I bought my old 93 Z28 back, now it needs some TLC

[birdie2000]

Personally I think your numbers are pretty good for cam only, great torque! I agree with the doctor, drive the crap out of it and enjoy it.

Just throwing this out there, but if you want to build a boosted motor, I've got a pretty awesome boost-ready lt1 shortblock that I'd sell. Needs assembly but all the machine work is done and such. It would hold just about anything you could throw at it.

Also, I've got a spare 93 shortblock sitting around that is prime for rebuilding. Kept it for a rainy day. Wouldn't mind getting it out of my garage either.

[ryanwarby01]

Personally I think your numbers are pretty good for cam only, great torque! I agree with the doctor, drive the crap out of it and enjoy it.

Exactly. Who cares about numbers anyway? Your car looks great and I'm sure it's fun to drive the way it is.

[mcalus]

I just want more! Lol. I'm glad to hear I can throw a 100 shot at it. Do my rings have to be anything special?

Jim, shoot me a pm on some prices. [MENTION=1248]birdie2000[/MENTION]

[ryanwarby01]

Jim's got the good stuff.

[birdie2000]

Michael, I'll shoot you some prices tomorrow. Gotta dig up the info first. Bug me about it if I don't remember tomorrow for whatever reason.

[mcalus]

Here is the update!

I'm going to be picking up a new (to me) used shortblock from Jim.

I'm going to need some advice from you fine folks on what I should put into the bottom end.

My plans are to make this a turbo motor for hopefully one of jonnys kits when he comes out with one. I don't plan on moving very fast since I'm now a home owner (bitter sweet). lol I dont have the money to blow like I did on the last one when I was living with mommy and daddy.

One thing I am going to do is pay attention to the detail on the engine bay. Mine is absolutely horrid. I thought last time around it was going to look mint since I powdercoated and painted so many things but it was the stuff I didn't do that really made it look bad. The engine bay will definitely be getting painted, what color yet im just not sure yet, and by that I don't mean black your imagination can do the rest.

So! Back to the motor, what kind of compression do I need for a boosted motor? I want something that will hold up to the abuse but not cost an arm and a leg. Something in the middle....If that makes sense. What do I go forged on? Pistons? Connecting rods? Crank? What rings? Arp hardware throughout I would assume? Studs or bolts?

Are these any good?
http://www.summitracing.com/parts/sl...6f30/overview/

Hopefully you guys can point me in the right direction.
@FASHOOTER @birdie2000 @ryanwarby01 @jderry [MENTION=254]JoeliusZ28[/MENTION]

[birdie2000]

How much power you want it to handle? Regardless, I would get a different piston IMHO. I'd also shoot for around 9.5:1 compression. I'd also seriously consider a 24x conversion.

[mcalus]

Not sure. I think Id be happy with high 400rwhp? Low 5's?

Also, what style of piston do I need to achieve lower compression?

24x will mostly be in the plans for 2 reasons, getting rid of the damn opti and tuning.

If I cant sell this car I need to make it into the car I will really enjoy the rest of my life.

[birdie2000]

Yeah, I mainly suggest the 24x for tuning options. You can make the opti work, but tuning options are sparse for LT1s these days (especially 93's) and you definitely want a dyno/street tune vs. mail-order. Plus, they're just flat out more reliable.

For those goals you'd probably be fine with a stock crank. General consensus is that they're pretty stout around that power level, but more than that and I'd start considering forged options. Rods I'd go with 4340 SCAT or Compstar H-beams for something budget-friendly and keep it at 5.7" rod length. Pistons I wouldn't skimp out on. Pay the extra money and get a good piston designed for forced induction, preferably 2618 aluminum. I'd probably go with a 24cc dished piston so you can keep your head choices open and still have a decent compression ratio. Use studs throughout the engine and use ARP2000 rod bolts. Never used L19 rod bolts myself but I've heard that L19 is a pain to handle and it's not necessary for what you want. Also, some may disagree, but I'd also get a 4-bolt main conversion done too.

[JoeliusZ28]

definitely stock crank for a budget. I'm not really an expert on bottom end builds but i prefer a true 4 bolt block over a splay. Talk to an engine builder.

24x for the win, just do it right and get it over with.

[jderry]

My car runs 12.30s on motor.
I ran a 11.44 a few weeks ago on the 100 shot.

I would just drive the snot of it and have fun for a bit.

FWIW I still have stock
Intake
Throttle body


If you're looking to build another LT1 buy a spare block and build it as you can.

If I had money now I would like to build a bada$$ 383 LT1 with some AI or LE H/C/I setup.

[nascarnate326]

I think a nice rebuilt low boost LT1 would do you well.

How much boost do you want to run? From what I have read on tech, 10psi can be handled from a basically stock motor.

Money into the heads would be my first priority.

[mcalus]

Whatever gets me to 500 rwhp reliable I'll be happy.

I'm gonna start with the bottom end and work my way up and continue to research.

Thanks for all the help so far guys.

[birdie2000]

Yeah, I'd worry about the bottom end first. Stock LT1s don't necessarily like boost and I think 10psi would be on borrowed time on a stock rebuild. Now with good rods and pistons that's another story. Stock heads IMO won't hold you back from your goals, porting would just make it easier to get there. For me, ported heads would be a "down the road" thing for your goals although it's certainly worth it if you have the budget.

[JoeliusZ28]

Yeah, I'd worry about the bottom end first. Stock LT1s don't necessarily like boost and I think 10psi would be on borrowed time on a stock rebuild. Now with good rods and pistons that's another story. Stock heads IMO won't hold you back from your goals, porting would just make it easier to get there. For me, ported heads would be a "down the road" thing for your goals although it's certainly worth it if you have the budget.

Agreed and looking forward to this build!