88BlackZ-51

Yes the Miniram has a larger plenum. Are you eliminating the Opti? I would think Jim would suggest this. I ran an aftermarket distributor!

Let me know when your ready to sell the car.

DVNCI

Opti is long gone, I installed a 24x a while back, I'll get some pics posted in the near future hopefully.

Everything I have is for sale - for the right price!

1993C4LT1

Props for not going LS. I know it's a "better" engine, but it is every where. And I'm no hipster, but I like having something most don't have. Sorry man, can't give you any tips. I'd be happy with a cam, LT's, and roller rockers Badass car btw, I love your choice of wheels. Of course, I may be a bit biased

tpi 421 vette

It's easy to get caught up in hp numbers. But I talked to Kevin and explained 750 to 800hp is more realistic for a pump gas hyd roller street engine. We aren't using a solid roller,race gas and super high rpm. It's actually getting a hyd roller Bullet cam 238/244 .605/.605 on a 114lsa. So it will be a drive it anywhere car with good street manners. We are doing a 396, I'll use a 5.85 Crower billet rod so we have room for a dish and have room to move the ring package down a little so the ring land is thicker. We'll use custom JE pistons, and a Callies Dragonslayor crank. The block has splayed 4 bolt mains and a low fill. With the AFR 227 heads, the biggest chamber size we can get is 65cc's, so we have to run a bit of a dish. We'll use a Crower shaft system with the heads for total durability. And I'm thinking 12 to 14lbs with meth and let the power numbers fall where they are. One thing a street engine with moderate boost should have a fairly long life to it. Running 20-25lbs boost is going to shorten engine life and this is a street engine first off.

KSA Aaron

So I have been down this path, but with an L98 vs LT1. And an LT1 is not so different from the old L98.


My thoughts, build the engine assy as bulletproof as possible. My bottom end consisted of a 4" stroke Crower Super-Lite crank, Oliver billet rods, JE Custom pistons, block was bored 0.030, fully relieved, splayed billet caps, half-fill and set with 9.7 scr. I used Swains-coating extensively in the engine build.


I used AFR220 with shaft rockers, large SR cam (248/254 @ 0.50, 0.7xx lift) and a modified single plane intake with mono-blade TB. 1-7/8" headers.


Initially I went with Bosch 85 lb/hr, but fell short on fuel (even with MeOH injection) with the R series blower. I later changed to 120 lb/hr injectors.


I ran steady in the 25+psig range, but during the winter it will exceed a 3BAR MAP.


All is tuned with FAST programming.


Build the bottom end as strong as possible so you only have to do it once. You can easily exceed 1000WHP with the proper combination of parts and enough boost.


Best of luck,
Aaron

bill mcdonald

I was going to mention, most builds of years past always ended up with a dyno pull that had to be cut short because of fuel issues. lines/pump/injectors 100% duty cycle.

It seems the math for power vs fuel injectors needs to be bumped up a little in the real world.

I was also being sarcastic about the LSX... I still have my l98, and would not swap it, even though all the BS I got for it, might make a little more hp then my supercharged LS6 that is street legal and passes ca emissions. I would not want the headache of swapping in an lsx series for a C4 anyhow. mo money for mods.

Also the LSx series also has distribution issues in the intake as well. I think it is #7 cylinder that has the issue.

KSA Aaron

I had plenty of fuel once I upgraded the complete system. Weldon Pump, All large braided stainless or hard lines and the larger injectors. The components are out there to build big power; it just costs money.


So true... I just replaced #7 slug over Christmas on my TT LS car. The C6 runs great now, but already initiated an ERL Superdeck 427 that will likely hold anything that I choose to throw at it in the foreseeable future. For now the engine will be tucked away, but I feel certain it will have a use soon enough.

STEVEN13

Following this thread.

Looking forward to the results.

I also have a solid axle C4 with 6 speed. I am in the process of installing a p600B. Will try to run it on e85.

Good luck!
Steve

cv67

Sounds like fun dont get too caught up in #s they dont win races
Follow your builders lead and stick with it.