[tippmann243]

built short block

mock up before i sent the heads out to get redone

couple pics of my MPFI intake manifold

 

[rat]

That double timing chain looks nice.

Love that intake manifold also. You making the rails yourself?

Edit, what comptuer you going to run?

 

[j894]

looks nice.

 

[tippmann243]

That double timing chain looks nice.

Love that intake manifold also. You making the rails yourself?

Edit, what comptuer you going to run?

yeah i dont know why but the double chain sets it off, just looks bad assed

i am machine my own rails, its one of my side projects in my engineering class, its been taking me a while because ive been really busy, but ive got a couple housr to spare this week so ill get some pictures

as for the computer, im still undecided

holley
megasquirt
or a chipped 2.8 mpfi ecu


i figure the holley and megasuirt would be easier, but the modded 2.8 ecu would be a lot cheeper and better for me since this truck is just a daily driver. i dunno, i just cant decide what route to go. im gonna talk to boosted thrills at nats and see how he like his holley and then ill try and make a decision

edit, i started kicking around the idea tonight to run a 96 and newer ecu, preferably a 2001(ls1 edit capable) and up 4.3 ecu and rewiring the truck

who knows this is all up in the air, im very indecisive as this whole computer thing

 

[tippmann243]

i guess i could give some specs

89 4.3 "Z' block .030
hi compression forged pistons (i got about 9.5cr with the headgasket im running)
stock rods shot peened(SP) with arp rod bolts
edelbrock camshaft
intake duration 210* exhaust duration 214* intake lift .479 exhaust lift .488 LSA 112
L35 cylinder heads casting number 209 ported and polished
mpfi

backed by an LT1 T56 with 35,000 original miles

its all going in my 93 4.3 5 speed sonoma

 

[TnHombre]

WHERE did you get those tails at? i know somebody looking for a set of those....

 

[MINTSICK]

Looking good, the edelbrock cam doesn't sound too bad at all!

 

[SwisS10]

how much hp are u expecting out of this?

 

[rat]

as for the computer, im still undecided

holley
megasquirt
or a chipped 2.8 mpfi ecu

I like the idea of an aftermarket unit. And, the megasquirt is really cheep(less than $300?). If you go with a factory unit you are probably stuck with narrow band o2 sensors.

The aftermarket units allow the use of wideband o2 sensor(s). With a wideband you can do closed loop wot fuel control(usualy). And, you can specify leaner than 14.7:1 afr's at cruise for fuel economy savings.

The newer comptuers, the tuning/scanning software is fairly expensive.

 

[tippmann243]

WHERE did you get those tails at? i know somebody looking for a set of those....

got them from a local guy for 30 bucks

Looking good, the edelbrock cam doesn't sound too bad at all!

yeah its a LOT better then the stock tbi cam but not wild enough to cause drivability issues since its my DD

how much hp are u expecting out of this?

hoping for about 200 tbi'ed then maybe like 230 ish MPFI'ed

I like the idea of an aftermarket unit. And, the megasquirt is really cheep(less than $300?). If you go with a factory unit you are probably stuck with narrow band o2 sensors.

The aftermarket units allow the use of wideband o2 sensor(s). With a wideband you can do closed loop wot fuel control(usualy). And, you can specify leaner than 14.7:1 afr's at cruise for fuel economy savings.

The newer comptuers, the tuning/scanning software is fairly expensive.

im still doing my research on the megasquirt so we will see where that leads me