Trying something different

[whooped]

Hello all,

1992 s15 jimmy 2dr 2wd+
200r4 (jake's performance billet built)+
3.42:1 built 10 bolt rear 7.625" eaton posi+
4.3 tbi .040 over+
rpm heated/ nitrided crank+
eagle esp h beam rods+
speed pro powerforged 9:1 pistons+
childs & ackerly file fit rings+
cleaned & gasket matched intake swirl port heads exh is hogged out+
1.6:1 full rollers self aligning+
screw in studs+
bullet custom ground cam on 1.5:1 = .498/.498, 218/226, 114lsa+
ceramic coated long tubes+
msd pro billed distributor+
whipple twin screw kit for tbi
discuss... Pictures to come.

 

[whooped]

Re: Trying something different

Really, not one opinion out there? I know it's not a syty, i know it's not a turbo. But it is boost. I wanna learn from ya'lls wisdom on the rotating assembly and other goodies. Btw that twin screw has an adiabatic efficiency of 81%.

 

[fauXGT]

Re: Trying something different

Where did you find the whipple? I've been looking for a year & half. Finally put in for a Wynjammer.

 

[whooped]

Re: Trying something different

Ebay. Picked it up last august. Seller said it was unused, from what i can tell it has nwver been used

 

[Bad Ass Black Trucks]

Re: Trying something different

Hello all,

1992 s15 jimmy 2dr 2wd+
200r4 (jake's performance billet built)+
3.42:1 built 10 bolt rear 7.625" eaton posi+
4.3 tbi .040 over+
rpm heated/ nitrided crank+
eagle esp h beam rods+
speed pro powerforged 9:1 pistons+
childs & ackerly file fit rings+
cleaned & gasket matched intake swirl port heads exh is hogged out+
1.6:1 full rollers self aligning+
screw in studs+
bullet custom ground cam on 1.5:1 = .498/.498, 218/226, 114lsa+
ceramic coated long tubes+
msd pro billed distributor+
whipple twin screw kit for tbi
discuss... Pictures to come.

What is your application? If you are trying to make lots of power consider short filling the block.

What heads? Those make a big difference on a 4.3. Stock LB4 heads were awful. L35's were descent and porting can make them flow very well. Vortec heads have a better combustion chamber that is supposed to reduce detonation and flow better than L35's. Unfortunately, there are hassles with converting to vortec heads, at least in a syty application.

Select your valve springs carefully, many that fit unmodified factory heads are limited to .500 lift. 1.6 rockers will take you over that total lift and into risky territory.

 

[whooped]

Re: Trying something different

i still intend for this thing to be a street/strip vehicle. I am considering short filling the block but i don't know if that would hinder it's drivability/longevity.

I'm using LB4 heads that have been worked on extensively on the exhaust side and cleaned up really well on the intakes. if you read here http://www.hotrod.com/techarticles/engine/113_0208_chevy_43l_262ci_v6_engine_build/index.html you'll see what Hot Rod got from the LB4 heads. Not amazing overall numbers, but when you consider what you start with it's jaw dropping. the valve springs will be appropriate for the cam. the heads will be machined to accept the new spring hardware w/ screw in studs. got a nice pushrod length checking tool so i can make sure my valetrain geometry is correct.