my 5.3 swap

Dmarsh525 · 08-12-2007, 02:02 AM

Quote: Originally Posted by Big96Zr2

stock manifolds, 2.5" all the way back to a flow master 40 right by the rear bumper. definately has its own sound, hope to have some good wheelin vids soon! came across a wiring bug, but I think I can get it fixed easily.

Brian

just a single 40 or Duals?? i have 2.5" true duals into 2 40's dumped before the axle...i hope mine sounds like yers...

Big96Zr2 · 08-13-2007, 01:52 PM

single 40....yours should sound prett good with dual 40s. try and put an X-pipe or H-pipe in if you have room, it will make an awesome sound.

Brian

Big96Zr2 · 04-15-2008, 09:03 PM

ok, I am going to bring this back to the top....again...

I am apparently having some cooling issues still, only when I am going slow, high revs....since I am using it for crawling, that happens alot.
I am using 2 12" efans without a shroud, I know a shroud might help, but I really dont have a way to make a nice one. I am thinking about getting a taurus fan, if I can find one cheap.

question about the the water flow through the radiator....when I look in the filler hole, how much flow should I see after the tstat opens up? I wonder if the water pump is dieing.....? what lb. rating should my cap be?

I can drive this thing around all day to the beach, on the road, whatever, but when it is revving, it is building heat faster......cornfused......

Brian

AmericanMuscle · 04-16-2008, 03:39 AM

are the cam and springs all you need to put the ls6 cam in the 5.3?

Big96Zr2 · 04-16-2008, 10:08 PM

thats all I was going to do....until I screwed up the cam bearings. then I replaced all the top end seals, cam bearings and had the heads milled...

Brian

lilsonoma · 04-17-2008, 10:23 PM

Big96Zr2, do you have a body lift on that thing? If you do and don't mind losing A/C you can put the radiator into the core support and replace the little fans you have with a Lincoln Mark VIII 18" electric fan. Most say it flows upwards of 5000 CFM but really it's about 4000-4500. Either way, I'm willing to bet it's double what your 12" fans do combined and comes with it's own shroud. They're on eBay for about 60-100 bucks. I plan to do the same thing with my next project.

Big96Zr2 · 04-17-2008, 10:31 PM

haha...I havent had AC in 2 years. its all gone. whats the dimensions of that fan? I looked on ebay the other day for one of those and came up with nothing.....

thanks for the heads up though.

Brian

lilsonoma · 04-17-2008, 10:31 PM

http://cgi.ebay.com/ebaymotors/Mark-...QQcmdZViewItem

Edit: Be warned though that it does draw 100amps at start up and requires 33-35amps to run the fan at full speed, so make sure your electrical system is up to par.

AmericanMuscle · 04-20-2008, 05:50 AM

that thing sounds great! did you happen to get it tuned and put on a dyno? I'd love to see the numbers a stock 5.3 with an ls6 cam, head work and tune got. especially with it still running the truck manifold.

Big96Zr2 · 04-20-2008, 10:57 AM

after I posted that, I was lookin on ebay last night and found those fans......I must have used different terms or something, who knows. damn, those things pull some serious amps. do the taurus fans pull the same? I have been lookin at the LS1 fans as well. I wonder if those pull the same about of amps??

I have had it tuned, but I never put it on the dyno. I would like to know what kind of numbers it would put down though. I would have to find some smaller roller tires, dont thing running the 42s on a dyno would work good for good numbers.

Brian

lilsonoma · 04-20-2008, 12:49 PM

The Taurus fans pull about 3500 cfm I've read, and ya the Lincoln Mark VIII fans do pull some serious amperage. The 98+ LS1 Camaro/Pontiac fans are pretty pathetic as far as pulling CFM but yet they do cool 5.7L's and 6.0L's alright. Only problem when comparing what they can cool is that the LSx motors in those cars have aluminum blocks and aluminum heads to help out in the heat transfer process.

I think if you can clear the Lincoln Mark fan I'd order that since they are so cheap. Hunt around on Car-Part.com to find local fans near you, otherwise eBay has them for a reasonable price I think. Make sure to get the pig tail for the fans, otherwise that's another $30 bucks you'll have to buy to wire the fans.

I would venture to guess your 5.3L is putting about 320hp 350lb-ft at the flywheel.

Edit: Btw Big96Zr2, to support my Lincoln fan on this next build I have a 250amp alternator and an Optima Yellow top. You most definitely DO NOT need the high output alternator but I would suggest at least the heavy duty battery. For your winch and off-road use I'd vouch for the Red Top. The 5.3L's came with 105 and 130 amp alternators from the factory so if you have the 105 amp, the 130 amp could be a quick and easy "upgrade" by finding a used one in the junkyard.

mrfrostberry · 04-21-2008, 01:10 AM

is that the stock steering linkage?

***philntx*** · 04-21-2008, 07:16 PM

The key to using the Mark VIII fans is the wiring harness.

Go the two speed route, use 3 60 or 80 amp relays, good wire, solder every connection possible, use two thermostats (if you aren't using the PCM to control the fans),

I've seen several "wiring diagrams" for these that were, at best, not ideal for this unit.

Another fan is the C6 Vette assembly that used PWM to control fan speed.

lilsonoma · 04-21-2008, 08:59 PM

Phil how would you go about using the PCM to control the two speed fan version of the Lincoln Mark VIII fan? It's a wrinkle I have not yet ironed out.

***philntx*** · 04-21-2008, 09:09 PM

Quote: Originally Posted by lilsonoma

Phil how would you go about using the PCM to control the two speed fan version of the Lincoln Mark VIII fan? It's a wrinkle I have not yet ironed out.

The Fbody uses two fans, you use one circuit for the low speed and the high speed circuit for the the high speed on the ford fan.

These have to go through relays. The PCM is just giving the ground circuit, nothing to do with power. Identify the low speed and the high speed ground circuit on the PCM and use those as the grounds on the relays.

The ford fan is a little tricky because you don't want to have power going to both the low speed and the high speed circuit at the same time.

The corvette PCM/fans are different. It uses pulse wave modulation to control fan speed. There's a module on the side of this fan shroud.

The full size truck uses a single blade electric fan, I haven't looked at a diagram for this one yet.

**Kampz69** · 04-22-2008, 11:52 AM

Quote: Originally Posted by philntx

The full size truck uses a single blade electric fan, I haven't looked at a diagram for this one yet.

Youre talking about Silverados and such right? I thought they had two fans, similar to Camaros/Firebirds? Check out this ebay auction for a radiator fan out of a 05 Tahoe:

http://cgi.ebay.com/ebaymotors/05-06...QQcmdZViewItem

v8steel · 04-24-2008, 04:55 PM

Hey there Big96Zr2

Awesome project. I am just starting a 5.3 swap into a '60 Cadillac for cruising. The Caddy weighs about the same as the Silverado this motor came out of, so it should perform about the same. After I have it running, I will most likely do some motor mods to increase the performance a little. I'm not planning on going too wild since the Caddy is for my wife.

I got a wiring diagram from http://www.ahdol.com/ and it seems to be complete, but I haven't started the harness conversion yet. Where did you get your pin-out info and can you share any pointers before I start? Any help would be greatly appreciated.

BudRacing · 04-24-2008, 04:57 PM

Is the fan with more blades the low speed and one with fewer high?

Big96Zr2 · 04-25-2008, 08:56 PM

thanks for the replies guys. I still havent decided on what fan to try out. I still have the stock Alt, but I do have an optima yellow top and I am in the process of changing the wire from the batt to the alt, I think I used one that is too small for the distance it has to go. no biggie really.

I got the pinout diagrams from a buddy of mine, but I think they are pretty much year/model specific.....atleast I believe so.

Brian

BudRacing · 04-26-2008, 12:32 AM

You should also think about getting a separate trans cooler so you're not taxing the radiator as much.

flawlessfab · 04-26-2008, 01:40 AM

i got a buddy that has multiple mark vIII fans and we are located near tampa,FL. pm if interested and i can get you a price and shipping cost....

Big96Zr2 · 04-26-2008, 10:49 AM

I tried to send a pm, but your box is full......please get me a qoute with shipping to 32218. thanks

as for the trans cooler....I have an external cooler only. you would think with the Howe dual pass radiator, it wouldnt be getting hot. thats why I think it is the fans I have.....
like I said before, I can drive down the road no problems overheating at all....even with the fans OFF....but when i come to a stop light I have to turn them on.
with what I do, my truck will see a lot of time going slow, but high RPMs....

Brian

flawlessfab · 04-26-2008, 01:39 PM

sorry my box was full , pm sent to you .....anybody else interested in mark 8 fans let me know we got tons.

Big96Zr2 · 04-27-2008, 07:50 PM

thanks for the heads up. I will let you know.

08-12-2007, 02:02 AM	#51
Dmarsh525 Registered User Join Date: Jan 2007 Posts: 222 Location: User is: OffLine	Re: my 5.3 swap Quote: Originally Posted by Big96Zr2 stock manifolds, 2.5" all the way back to a flow master 40 right by the rear bumper. definately has its own sound, hope to have some good wheelin vids soon! came across a wiring bug, but I think I can get it fixed easily. Brian just a single 40 or Duals?? i have 2.5" true duals into 2 40's dumped before the axle...i hope mine sounds like yers...
	[Reply w/Quote]

08-13-2007, 01:52 PM	#52
Big96Zr2 Registered User Age: 29 Join Date: Oct 2002 Posts: 126 Location: Jacksonville, FL User is: OffLine	Re: my 5.3 swap single 40....yours should sound prett good with dual 40s. try and put an X-pipe or H-pipe in if you have room, it will make an awesome sound. Brian
	[Reply w/Quote]

04-15-2008, 09:03 PM	#53
Big96Zr2 Registered User Age: 29 Join Date: Oct 2002 Posts: 126 Location: Jacksonville, FL User is: OffLine	Re: my 5.3 swap ok, I am going to bring this back to the top....again... I am apparently having some cooling issues still, only when I am going slow, high revs....since I am using it for crawling, that happens alot. I am using 2 12" efans without a shroud, I know a shroud might help, but I really dont have a way to make a nice one. I am thinking about getting a taurus fan, if I can find one cheap. question about the the water flow through the radiator....when I look in the filler hole, how much flow should I see after the tstat opens up? I wonder if the water pump is dieing.....? what lb. rating should my cap be? I can drive this thing around all day to the beach, on the road, whatever, but when it is revving, it is building heat faster......cornfused...... Brian
	[Reply w/Quote]

04-16-2008, 03:39 AM	#54
AmericanMuscle its just greg Age: 23 Join Date: Dec 2005 Posts: 1,599 Location: az User is: OffLine	Re: my 5.3 swap are the cam and springs all you need to put the ls6 cam in the 5.3?
	[Reply w/Quote]

04-16-2008, 10:08 PM	#55
Big96Zr2 Registered User Age: 29 Join Date: Oct 2002 Posts: 126 Location: Jacksonville, FL User is: OffLine	Re: my 5.3 swap thats all I was going to do....until I screwed up the cam bearings. then I replaced all the top end seals, cam bearings and had the heads milled... Brian
	[Reply w/Quote]

04-17-2008, 10:23 PM	#56
lilsonoma S-series Member Join Date: Oct 2007 Posts: 520 Location: User is: OffLine	Re: my 5.3 swap Big96Zr2, do you have a body lift on that thing? If you do and don't mind losing A/C you can put the radiator into the core support and replace the little fans you have with a Lincoln Mark VIII 18" electric fan. Most say it flows upwards of 5000 CFM but really it's about 4000-4500. Either way, I'm willing to bet it's double what your 12" fans do combined and comes with it's own shroud. They're on eBay for about 60-100 bucks. I plan to do the same thing with my next project.
	[Reply w/Quote]

04-17-2008, 10:31 PM	#57
Big96Zr2 Registered User Age: 29 Join Date: Oct 2002 Posts: 126 Location: Jacksonville, FL User is: OffLine	Re: my 5.3 swap haha...I havent had AC in 2 years. its all gone. whats the dimensions of that fan? I looked on ebay the other day for one of those and came up with nothing..... thanks for the heads up though. Brian
	[Reply w/Quote]

04-17-2008, 10:31 PM	#58
lilsonoma S-series Member Join Date: Oct 2007 Posts: 520 Location: User is: OffLine	Re: my 5.3 swap http://cgi.ebay.com/ebaymotors/Mark-...QQcmdZViewItem Edit: Be warned though that it does draw 100amps at start up and requires 33-35amps to run the fan at full speed, so make sure your electrical system is up to par. Last edited by lilsonoma : 04-17-2008 at 10:32 PM.
	[Reply w/Quote]

04-20-2008, 05:50 AM	#59
AmericanMuscle its just greg Age: 23 Join Date: Dec 2005 Posts: 1,599 Location: az User is: OffLine	Re: my 5.3 swap that thing sounds great! did you happen to get it tuned and put on a dyno? I'd love to see the numbers a stock 5.3 with an ls6 cam, head work and tune got. especially with it still running the truck manifold.
	[Reply w/Quote]

04-20-2008, 10:57 AM	#60
Big96Zr2 Registered User Age: 29 Join Date: Oct 2002 Posts: 126 Location: Jacksonville, FL User is: OffLine	Re: my 5.3 swap after I posted that, I was lookin on ebay last night and found those fans......I must have used different terms or something, who knows. damn, those things pull some serious amps. do the taurus fans pull the same? I have been lookin at the LS1 fans as well. I wonder if those pull the same about of amps?? I have had it tuned, but I never put it on the dyno. I would like to know what kind of numbers it would put down though. I would have to find some smaller roller tires, dont thing running the 42s on a dyno would work good for good numbers. Brian
	[Reply w/Quote]

04-20-2008, 12:49 PM	#61
lilsonoma S-series Member Join Date: Oct 2007 Posts: 520 Location: User is: OffLine	Re: my 5.3 swap The Taurus fans pull about 3500 cfm I've read, and ya the Lincoln Mark VIII fans do pull some serious amperage. The 98+ LS1 Camaro/Pontiac fans are pretty pathetic as far as pulling CFM but yet they do cool 5.7L's and 6.0L's alright. Only problem when comparing what they can cool is that the LSx motors in those cars have aluminum blocks and aluminum heads to help out in the heat transfer process. I think if you can clear the Lincoln Mark fan I'd order that since they are so cheap. Hunt around on Car-Part.com to find local fans near you, otherwise eBay has them for a reasonable price I think. Make sure to get the pig tail for the fans, otherwise that's another $30 bucks you'll have to buy to wire the fans. I would venture to guess your 5.3L is putting about 320hp 350lb-ft at the flywheel. Edit: Btw Big96Zr2, to support my Lincoln fan on this next build I have a 250amp alternator and an Optima Yellow top. You most definitely DO NOT need the high output alternator but I would suggest at least the heavy duty battery. For your winch and off-road use I'd vouch for the Red Top. The 5.3L's came with 105 and 130 amp alternators from the factory so if you have the 105 amp, the 130 amp could be a quick and easy "upgrade" by finding a used one in the junkyard. Last edited by lilsonoma : 04-20-2008 at 12:57 PM.
	[Reply w/Quote]

04-21-2008, 01:10 AM	#62
mrfrostberry Registered User Age: 24 Join Date: Mar 2008 Posts: 6 Location: User is: OffLine	Re: my 5.3 swap is that the stock steering linkage?
	[Reply w/Quote]

04-21-2008, 07:16 PM	#63
*philntx* Build them right....Mod Age: 54 Join Date: Jul 2006 Posts: 2,123 Location: Plano TX User is: OffLine	Re: my 5.3 swap The key to using the Mark VIII fans is the wiring harness. Go the two speed route, use 3 60 or 80 amp relays, good wire, solder every connection possible, use two thermostats (if you aren't using the PCM to control the fans), I've seen several "wiring diagrams" for these that were, at best, not ideal for this unit. Another fan is the C6 Vette assembly that used PWM to control fan speed.
	[Reply w/Quote]

04-21-2008, 08:59 PM	#64
lilsonoma S-series Member Join Date: Oct 2007 Posts: 520 Location: User is: OffLine	Re: my 5.3 swap Phil how would you go about using the PCM to control the two speed fan version of the Lincoln Mark VIII fan? It's a wrinkle I have not yet ironed out.
	[Reply w/Quote]

04-21-2008, 09:09 PM	#65
*philntx* Build them right....Mod Age: 54 Join Date: Jul 2006 Posts: 2,123 Location: Plano TX User is: OffLine	Re: my 5.3 swap Quote: Originally Posted by lilsonoma Phil how would you go about using the PCM to control the two speed fan version of the Lincoln Mark VIII fan? It's a wrinkle I have not yet ironed out. The Fbody uses two fans, you use one circuit for the low speed and the high speed circuit for the the high speed on the ford fan. These have to go through relays. The PCM is just giving the ground circuit, nothing to do with power. Identify the low speed and the high speed ground circuit on the PCM and use those as the grounds on the relays. The ford fan is a little tricky because you don't want to have power going to both the low speed and the high speed circuit at the same time. The corvette PCM/fans are different. It uses pulse wave modulation to control fan speed. There's a module on the side of this fan shroud. The full size truck uses a single blade electric fan, I haven't looked at a diagram for this one yet.
	[Reply w/Quote]

LinkBacks (?) LinkBack to this Thread: http://www.s10forum.com/forum/f213/my-5-3-swap-278808/
Posted By	For	Type	Date
New England Motorsports - Came Accross A Deal I Couldnt Pass Up (5.3l)	This thread	Refback	05-10-2007 03:07 PM
New England Motorsports - Came Accross A Deal I Couldnt Pass Up (5.3l)	This thread	Refback	05-10-2007 12:08 PM
New England Motorsports - Came Accross A Deal I Couldnt Pass Up (5.3l)	This thread	Refback	05-10-2007 11:44 AM

04-22-2008, 11:52 AM	#66
Kampz69 Need LSx swap..... Age: 31 Join Date: Feb 2002 Posts: 2,074 Location: SW Chicago burbs User is: OffLine	Re: my 5.3 swap Quote: Originally Posted by philntx The full size truck uses a single blade electric fan, I haven't looked at a diagram for this one yet. Youre talking about Silverados and such right? I thought they had two fans, similar to Camaros/Firebirds? Check out this ebay auction for a radiator fan out of a 05 Tahoe: http://cgi.ebay.com/ebaymotors/05-06...QQcmdZViewItem
	[Reply w/Quote]

04-24-2008, 04:55 PM	#67
v8steel Registered User Join Date: Apr 2008 Posts: 1 Location: User is: OffLine	Re: my 5.3 swap Hey there Big96Zr2 Awesome project. I am just starting a 5.3 swap into a '60 Cadillac for cruising. The Caddy weighs about the same as the Silverado this motor came out of, so it should perform about the same. After I have it running, I will most likely do some motor mods to increase the performance a little. I'm not planning on going too wild since the Caddy is for my wife. I got a wiring diagram from http://www.ahdol.com/ and it seems to be complete, but I haven't started the harness conversion yet. Where did you get your pin-out info and can you share any pointers before I start? Any help would be greatly appreciated.
	[Reply w/Quote]

04-24-2008, 04:57 PM	#68
BudRacing Molon Labe Age: 23 Join Date: Aug 2004 Posts: 4,929 Location: Statesboro, Ga User is: OffLine	Re: my 5.3 swap Is the fan with more blades the low speed and one with fewer high?
	[Reply w/Quote]

04-25-2008, 08:56 PM	#69
Big96Zr2 Registered User Age: 29 Join Date: Oct 2002 Posts: 126 Location: Jacksonville, FL User is: OffLine	Re: my 5.3 swap thanks for the replies guys. I still havent decided on what fan to try out. I still have the stock Alt, but I do have an optima yellow top and I am in the process of changing the wire from the batt to the alt, I think I used one that is too small for the distance it has to go. no biggie really. I got the pinout diagrams from a buddy of mine, but I think they are pretty much year/model specific.....atleast I believe so. Brian
	[Reply w/Quote]

04-26-2008, 12:32 AM	#70
BudRacing Molon Labe Age: 23 Join Date: Aug 2004 Posts: 4,929 Location: Statesboro, Ga User is: OffLine	Re: my 5.3 swap You should also think about getting a separate trans cooler so you're not taxing the radiator as much.
	[Reply w/Quote]

04-26-2008, 01:40 AM	#71
flawlessfab Registered User Age: 26 Join Date: Jan 2007 Posts: 162 Location: User is: OffLine	Re: my 5.3 swap i got a buddy that has multiple mark vIII fans and we are located near tampa,FL. pm if interested and i can get you a price and shipping cost....
	[Reply w/Quote]

04-26-2008, 10:49 AM	#72
Big96Zr2 Registered User Age: 29 Join Date: Oct 2002 Posts: 126 Location: Jacksonville, FL User is: OffLine	Re: my 5.3 swap I tried to send a pm, but your box is full......please get me a qoute with shipping to 32218. thanks as for the trans cooler....I have an external cooler only. you would think with the Howe dual pass radiator, it wouldnt be getting hot. thats why I think it is the fans I have..... like I said before, I can drive down the road no problems overheating at all....even with the fans OFF....but when i come to a stop light I have to turn them on. with what I do, my truck will see a lot of time going slow, but high RPMs.... Brian Last edited by Big96Zr2 : 04-26-2008 at 10:51 AM.
	[Reply w/Quote]

04-26-2008, 01:39 PM	#73
flawlessfab Registered User Age: 26 Join Date: Jan 2007 Posts: 162 Location: User is: OffLine	Re: my 5.3 swap sorry my box was full , pm sent to you .....anybody else interested in mark 8 fans let me know we got tons.
	[Reply w/Quote]

04-27-2008, 07:50 PM	#74
Big96Zr2 Registered User Age: 29 Join Date: Oct 2002 Posts: 126 Location: Jacksonville, FL User is: OffLine	Re: my 5.3 swap thanks for the heads up. I will let you know.
	[Reply w/Quote]