hows my heads look?

[The_Raven]

Quote: Originally Posted by ezrollin

Yes,one of the cams even is recommended for mild turbo charging,the 112* I believe.Not to insult you but have you done any reseach on turbo charging? Some people think it's as simple as bolting in a turbo.

That would be the cam I used, and worked well.

[pearl91chevy]

yes, i spent hours researching about adding this turbo. i've checked all forums with people who has added turbo's to there 3.1L. i was just curious about the cam since im not to familer with what im gonna need with it

[pearl91chevy]

i've started tearing into the motor and finding out how im gonna run this turbo, it seems best bet i have is locating the turbo where the orignial alternator bracket was, and relocating the alternator to the a/c compressor spot.. Would be much easier for the exhaust end and i can make it a hell of alot cleaner look! let me kno what ya guys this so far about this idea.. and any help on mounting the alternator on the other side would be great!

orignal location:


look at the space between there! im sure i could get even more room if i cut up the wall a bit if needed.


No room on other side, would be a major pain in the ass..


and rough idea of mounting location of the turbo..

[The_Raven]

I mounted my turbo on the passenger side as well, retained the stock inner wheel well, though it did need a little bit of massaging to make sure the turbo drain didn't hit with engine movement.

I moved the alternator to the A.I.R. pump location.

The down pipe went right passed the crossover pipe, in that area where the original passenger side exhaust originally was. It was a tight fit, and next time I think I would design the headers a bit differently, and bring the driver sie exhaust under the or around the front of the engine, to allow for a larger downpipe from the turbo. I was limted to about 2.25" downpipe.

Here are a few pictures:









BTW, I would be willing to sell the headers, they are just hanging on the wall right now. The crossover would need to be rebuilt, or built new, since I used the flanges for another project.

[pearl91chevy]

hmm.. those pictures really help out alot, i didnt know if i should get rid of my smog pump since its just there for the hell of it, so maybe ill consider that..

and since i cant run the pipe under because the trucks bagged and it will crush the pipe, im thinkin about running it between the motor and cab, and the other exhaust pipe down normallly like the original y pipe is ran.. just curious how much want want for those headers? and what u mean the crossover?

[pearl91chevy]

and also how did you do the oil lines with the turbo? from what i seen on thirdgen.org he "t"'d off where the oil sensor goes and ran a line off that to the turbo, then a line from turbo down to a bung and a fiting on the oil pan..

[The_Raven]

The crossover that connects the driver side header to the passenger side header. It's the silver tube in the 2nd picture in my above post. PM me to discuss more details on that.

Yes, the oil feed was made by adding a T fitting to where the oil pressure sender is originally. I used an NPT close nipple, and plumbing cast "T". In my case I used these parts in 1/4" NPT, since I drilled the oil filter adaptor for a larger fitting for higher flow. Original 2.8 in the S-10, at least in the '80s were 1/8" NPT. I'm not sure if later RWD 2.8s used a larger thread, like the FWD 660 used when they went to the 3.1 in 1990.

Oil return was made from -10 AN, and a bung welded to the oil pan, with a couple 45* NPT to AN adaptors. I also have these parts for sale, again PM me for more info.

[pearl91chevy]

alright after checkin out those pics, i gave a try at stickin the alt. there and it works out great! just a lil work to get it to align up but no biggie..



and i got the wiring harness out of the engine compartment, im probly gonna run them inside the cab to clean the engine bay up..

[pearl91chevy]

alright me a my friend "the one thats helping me build this thing" and thought we should stick on the safe side when we finally get to start this thing. Im getting the turbo mounted first and all the piping ran, then once thats done i will be pulling the motor and installing the cam/misc other things. But what would be some good things to do when we first start it? whats a good timing setting? will my fuel pump be alright, its a new stock one and i've read since my turbo is small enough i wont have problems with it.

[The_Raven]

Why would you do 3 times the work?

Why don't you just install the cam "and other things" now, and be done with it?

[pearl91chevy]

i must have no worded that right lol.. i meant to say is, im gonna get that turbo mounted and all the clearance work done if any needed on the cab, once i get it correct, thats when i will pull the motor and build it since im gonna be painting the truck in this time period.. the truck will not run again until its fully built with turbo installed..

[Deeze49686]

did you pick a cam that will work well with a turbo?

and the only other thing is how much boost? under 5 psi?

if its over that with the stock exhaust valves, you might overtemp flash from the cylinder temp being to high.

it took me a long time to figure out why the hell i was getting boost knock on an old 2.2 turbo, and thats cause the assholes at the machine shop didnt use filled valves when they did my head work.

[pearl91chevy]

Quote: Originally Posted by Deeze49686

did you pick a cam that will work well with a turbo?

and the only other thing is how much boost? under 5 psi?

if its over that with the stock exhaust valves, you might overtemp flash from the cylinder temp being to high.

it took me a long time to figure out why the hell i was getting boost knock on an old 2.2 turbo, and thats cause the assholes at the machine shop didnt use filled valves when they did my head work.

i havent chose a cam yet, but i been checking this one out, its the same one "the raven" used. and he knows his shit about these motors and i know i need to listen to him about it. http://store.summitracing.com/partde...5&autoview=sku

not sure how much boost but i've read the stock boost for this turbo is around 4-5psi if its right, im not looking for crazy power outta this motor either with the turbo.. but when i was looking to see how much boost my turbo has i found this

First some theory: A stock 300ZX has one of the most basic turbo systems available. It is a single, fixed pitch turbocharger (Garret T-3), with a stock boost of 4-5psi. There is no intercooler or compressor bypass valve, and the wastegate is built into the turbocharger assembly(internal). There is an external pop-off valve (not the same as a bypass valve), which is in the intake manifold. Why is the system so simple? Because it is only made to handle low boost situations. I once had some yahoo go on and on about intercoolers, saying how they are so great, why doesn't the Z have one... nanana... An intercooler is NOT EFFECTIVE below 8 psi, the costs/losses from an intercooler would exceed any possible gains; dumb guy still doesn't understand it. Same for a bypass valve. What this means for us is that there is a lot of room for improvement..

so what this is saying i wont need to buy a wastegate, and possibly i wont need to run a intercooler? and btw the trucks getting some head work done lol so no worries

[Deeze49686]

maybe have them use the 3.1 turbo exhaust valves?

[The_Raven]

Quote: Originally Posted by Deeze49686

maybe have them use the 3.1 turbo exhaust valves?

Same as non turbo 3.1 exhaust valves, for the genII, besides they won't fit the iron heads.

I also wouldn't use a blanket statement like:

Quote:

An intercooler is NOT EFFECTIVE below 8 psi, the costs/losses from an intercooler would exceed any possible gains

Once you realize that "boost pressure" measured in PSIG is JUST a measurement of restriction in relation to the flow of air, then you can start to realize that it really is an irrelevant measurment, when comparing one engine or turbo set-up to another.

One engine could make 200 HP at 7 PSIG, while another makes 1000 HP at 7 PSIG, the difference is flow, and believe me, that 1000 HP engine can certainly benefit from the IC. I would also say the 200 HP engine would benefit from an IC of proper size and placement, since anytime air is compressed it gets heated up, removing as much of this heat as possible, will provide gains.

I ran an FMIC on my set-up, and would max out the injectors at 7 PSIG, I didn't run it without, but I'm sure I would have lost some power if I had, or worse yet, had pre-ignition start from the heated intake charge.

[pearl91chevy]

so it is a better idea running the intercooler?

[The_Raven]

Quote: Originally Posted by pearl91chevy

so it is a better idea running the intercooler?

Yes, removing any heat from the intake charge is better than removing none at all.

[pearl91chevy]

oki, thanks for the advice, im waitin on the headers before i start doing anything else to the motor..

[pearl91chevy]

alright, i havent had much time to work on the truck, but im just trying to get a parts list made up so i can start ordering stuff. hows this look so far? and please add ANYTHING that you guys might think im gonna need, i already have the msd coilpack so no worries there. Should i go pick up a tb off a 4.3L? and if i use that 4.3L tb, will i need to use the injectors from that or from my 2.8L?

intake:
http://store.summitracing.com/partdetail.asp?part=EDL%2D3785&N=700+4294908216+42 94908198+4294869665+4294925239+115&autoview=sku

Cam and lifters:
http://store.summitracing.com/partde...5&autoview=sku

cap and rotor:
http://store.summitracing.com/partde...5&autoview=sku

Spark plugs, would these be over kill?
http://store.summitracing.com/partde...5&autoview=sku

[34blazer]

i think that intake is a waste of money, the only thing i did was bore mine out and port it

[neo71665]

Went a bit overboard hogging out under the Tb did we?

[34blazer]

Quote: Originally Posted by neo71665

Went a bit overboard hogging out under the Tb did we?

a little

[neo71665]

Notice a good bit of drop in the bottom end but replaced in the top end?

[pearl91chevy]

i was wondering that, it looked like that was a huge difference lol, was it worth it?

[34blazer]

Quote: Originally Posted by pearl91chevy

i was wondering that, it looked like that was a huge difference lol, was it worth it?

dont know yet, i shipped out before i could finish it. and at this rate, i wont be able to finish til next summer with the cam i bought, i figured i threw any bottom end tork out the window. in this case i wanted to add plenum volume. soon enough ill be asking you guys for advice as you can see i have an extra manifold, well a few actually. Pearlchev, are you boosting your tbi?

[neo71665]

Quote: Originally Posted by 34blazer

dont know yet, i shipped out before i could finish it. and at this rate, i wont be able to finish til next summer with the cam i bought, i figured i threw any bottom end tork out the window. in this case i wanted to add plenum volume. soon enough ill be asking you guys for advice as you can see i have an extra manifold, well a few actually. Pearlchev, are you boosting your tbi?

Well from the looks of it you just changed it out to a single plane intake damn near. I don't know about them on these small motors but on our drag truck we ran one for a bit and it wasn't worth a crap without a ton of NOS off the line. We soon swapped back to a dual plane cause we couldn't afford to loose all the bottom end we did only running 1/8th mile.

Good luck and keep us posted on it. I also got 3 intakes but only playing with one, porting/polishing and also smoothing down the outside and might polish it up.

[pearl91chevy]

Quote: Originally Posted by 34blazer

dont know yet, i shipped out before i could finish it. and at this rate, i wont be able to finish til next summer with the cam i bought, i figured i threw any bottom end tork out the window. in this case i wanted to add plenum volume. soon enough ill be asking you guys for advice as you can see i have an extra manifold, well a few actually. Pearlchev, are you boosting your tbi?

yes thats the plan with boosting it, im hopefully buying some headers from THE RAVEN soon, i just been waiting on him to get me a price so i can get them shipped out..

[34blazer]

Quote: Originally Posted by pearl91chevy

yes thats the plan with boosting it, im hopefully buying some headers from THE RAVEN soon, i just been waiting on him to get me a price so i can get them shipped out..

you may want to run a different fuel pressure reg. the factory fpr has no way of sensing boost. same goes with the map sensor.

[34blazer]

Quote: Originally Posted by neo71665

Well from the looks of it you just changed it out to a single plane intake damn near. I don't know about them on these small motors but on our drag truck we ran one for a bit and it wasn't worth a crap without a ton of NOS off the line. We soon swapped back to a dual plane cause we couldn't afford to loose all the bottom end we did only running 1/8th mile.

Good luck and keep us posted on it. I also got 3 intakes but only playing with one, porting/polishing and also smoothing down the outside and might polish it up.

im also running nitrous on my 3.4. gotta hurry up and blow it up so i can put the 3400 in there. ok not really but its still gettin nitrous. i was thinkin about runnin a spray bar in my 2in spacer, otherwise its just another piece of scape metal. have fun good luck cheerio