how does this shortblock sound?

[jeremy stanke]

385 LT1 short block built by Kowalsky machine out of Lynchburg Va (www.kowalskymachine.com (http://www.kowalskymachine.com))
Scat forged 4340 crank 3.75 stroke
Eagle 5.7" H beams
JE forged pistons (12.5:1 w/64CC heads) 4.040"
SpeedPro hell fire rings
Program billet 4 bolt mains with ARP main studs
all coated bearings (std size)
Cloyes Hex-a-just double roller
Melling HVLP oil pump with welded on pickup for Milidon pan machine work
4.040 bore and hone
line honed
true 4 bolt block
rings gapped for nitrous
0 decked
lifter valley holes tapped and filled with pipe plugs and vent tubes to prevent windage
front and rear drain plugs screened

Milidon 7qt oil pan
SFI damper (pro products)
COMP cams custom grind solid roller cam installed and degreed in
24X*/25X* 63X"/64X" ( the lift is with a 1.65 intake and 1.75 exhaust rocker)
motor was almost the same before the rebuild and made 562HP and 527TQ at 6700 with 11.5:1 compression on motor on the engine dyno but is built for up to a 300 shot

[Fastbird]

Just curious, what heads are you planning on going with?? If you use a stock LTx casting your static compression ratio is going to be off the charts. I believe that TFS heads as cast are 64CC's. Definitely a high compression setup.

[jeremy stanke]

i was thinking about something from LE or AI

[Fastbird]

i was thinking about something from LE or AI

Just make sure it's an aftermarket casting like TFS or something with a larger chamber. THe LT1 head is a 54CC chamber. I'd honestly look at going with a smaller dome on the piston to help things out.

[Milk Man]

ya 11.5 was probably made with aftermarket heads. if you go with a stock head your CR will be way to high to run on pump gas. e85 on the other hand...

[jeremy stanke]

they were running stock heads ported to 300cc but it was converted to a carb at the time

[Fastbird]

they were running stock heads ported to 300cc but it was converted to a carb at the time

What was ported to 300CC??? Certainly not the stock heads. Hell, even the biggest AFR's won't open up to 300CC.

Were you talking CFM???? Completely irrelevant to what we're talking about here. CFM has no bearing on compression ratio.

[jeremy stanke]

thats what they said, here is the link

http://www.camaroz28.com/forums/showthread.php?t=509570

[Stroked96Bowtie]

Yeah the shortblock sounds good...like stated thats a little high compression for a pump gas motor. If you want a race only setup this would be good.

If you want to keep it on pump gas with this setup...your tuner will hate you:shiner:

Other than the compression being too high looks like a good setup...if you can find a corvette block (4-bolt) that will save you some bucks. I paid $400 to have my 2 bolt block converted to splayed. If you cant find a vette block cheaper than that just get the splayed mains.

[Fastbird]

thats what they said, here is the link

http://www.camaroz28.com/forums/showthread.php?t=509570

Ok, the stats on the heads that he posted don't mean jack. 300CFM at .650 lift means squat. What's the intake runner volume, what's the combustion chamber size, ect. What he gave doesn't help you out at all. Something else about that motor that didn't look right: he's saying HP peaked at 6700 RPM by what he stated. That's a bit shallow given the supposed size of the setup with that cam. That thing should peak closer to 7K+ I think.

On to your setup, if you go with the above motor you originally posted, I think a set of LE or AI Ported Trick Flow heads that are NOT milled down would probably do you quite nicely.

[jeremy stanke]

ok thanks guys, i dont understand this stuff. the link that i posted is the block that i bought. he sold it to his friend who had it rebuilt to raise the compression and i just bought it for 1700. i would like to keep it pump gas so what should i do to it? thanks

[Fastbird]

Well, short of a new set of heads, I don't think it's going to be pump gas friendly. If you want to change something in the block, you'll have to tear it down and put a new set of pistons in it.

[jeremy stanke]

it doesnt have any heads or intake right now, just the block. i would prefer not to have to touch the block so any suggestions on heads and stuff?

[Stroked96Bowtie]

Its not clear what you have an what you dont...the OP has a complete setup with heads.

So you bought the shortblock from that sale ad? You got the rotating assembly as well (crank, rods, pistons)? Please describe what you have so we can help.

If the setup requires a 64cc head to get 12.1CR, you're going to have a hard time keeping it on pump gas without pulling timing to avoid detonation. The car will run fine like this but when timing is pulled...so is some of the power.

[jeremy stanke]

sorry for the confusion. i bought the shortblock which has everything that i posted in the first page. the link that i posted is what the previous owner was running with. he also had it converted to a carb, i want to go back to fuel injected.

[Stroked96Bowtie]

sorry for the confusion. i bought the shortblock which has everything that i posted in the first page. the link that i posted is what the previous owner was running with. he also had it converted to a carb, i want to go back to fuel injected.

I see...you bought his crank and rods and used your own pistons? His shortblock had 11.1 SRPs that were .030 over (383). Your 385 has a .040 bore so you bought your own pistons. The shortblock is already built and ready to go? Just need heads and topend?

[jeremy stanke]

sorry i will try again, he sold the motor to his friend who had it rebuilt to a 385 and used different pistons, i guess. the list of specs. on the first page is what im getting, the link that i posted was what it used to be i guess. thanks and sorry for being so ignorant about all of this stuff

[jeremy stanke]

yes the block is already built and ready to go minus the topend and heads

[Stroked96Bowtie]

sorry i will try again, he sold the motor to his friend who had it rebuilt to a 385 and used different pistons, i guess. the list of specs. on the first page is what im getting, the link that i posted was what it used to be i guess. thanks and sorry for being so ignorant about all of this stuff


yes the block is already built and ready to go minus the topend and heads

:jest: Whew...what a long road that was.:jest:

No big deal...those pistons are made for a larger combustion chamber. You will have to have aftermarket heads no doubt. I went with AFRs for my setup and they can get the chamber just about any size you need it (up to 75cc I believe). I think most would suggest lowering the compression...for pump gas. Have a set of AFRs made with a slightly bigger chamber.

LT4 intake or single plane are going to be your intake options. Both intakes will work with aftermarket heads with some modifications. The single plane is going to cost around 1500 minimum to get it on the car, the LT4 intake would certainly be a lower cost direction....just depends on what you want to do.

[Speed Density]

Like sean said you need a bigger chamber for that setup. And I doubt thats gona hold 300hp hit for very long.

[jeremy stanke]

how much of a shot do you think it will hold?

if i go with AFR heads and a LT4 intake how much do you think that would cost?

also i only paid 1700 + another 300 or so for shipping, so for 2000 is this a good deal? i could have had a 400-450 whp 383 built with heads from a local shop around here for 4500.

[IronOutlaw]

i think its a good deal. Someone with more nitrous experience than me will chime in but i think it should take a 200 shot pretty easily, but with your combo youll be making really good NA power.

[jeremy stanke]

any guess on NA numbers?
i dont know if i even have the motor now, its relisted now after we had a deal

[IronOutlaw]

Well over 400 is all i could say.

I hope you didnt lose it that sucks when people do that shit. I know a guy who was going to buy a car and the guy told him it was sold and a week later it was on autotrader for 2000 more dollars.

[Speed Density]

Internals wise that thing should hold a 200 maybe a 250 pretty well. Id really like to see more specs on the pistons, rings, piston crown, material etc..

12.5:1 is a bit much on pump gas, you might be able to get away with it if oyu have 93.

At the cost of out of the box AFR's your better of getting your stock heads ported, but you also will get a small combustion chamber. Kinda catch 22.

You did get a deal on the short, but it just depends on how well its built. I can build you a shortblock for $200, doesnt mean its gona be quality.

Good Luck man, keep us updated.

[jeremy stanke]

we have 94 sunoco here, all i was told is that it has nitrous domes. he said they are a custom piston in a 522R JE casting. i was told that i couldnt use stock ported heads w/o race fuel

[Speed Density]

Your chambers will be small with stock heads on that setup. You could have run the same piston etc.. but you would have had to set it up for a small chamber, since its already assembled you might have to go aftermarket. I tried google'n 522R and didnt come up with anything.

Nitrous isnt just effecting your internals, your camshaft will decide how much gas you can run, big shots need a lot of exahust duration on the cam to get the gas out.

You have any pictures?

[Speed Density]

That car looks like a hugggge POS. Unless your making it a racecar id stay away 100%.

[jeremy stanke]

lol i sent you the wrong link. that is actually my car that im selling. i bought it without researching and was new to fbodies. i will send you the right one

[MeanGreen94Z]

HEY! thats my short block lol...i had AFR210CC heads for it but sent them back to get my 9"...i bought the motor from that guy you posted the link to on CZ28.com.... lol he is a good friend of mine lives 10 minutes from me. are you still going to get it? planning a meet in the middle still? any questions you have post them up and well deciper through them with the help of others :). the pistons have 522R and P on the bottom to differentiate the ones that go in the inside and outside due to the valve recesses being sized to the valves. IF you want to run stock heads you can pay a shop to tear it back down (everything is marked from the initial rebuild, and all clearences are set.) mill the pistons its not very expensive to do and worth it (they are derived off a flat top with the domes added by CNC.) hence the custom piston. they arent exactly .040 and neither is the block, and it was done this was so they could be honed .002 at a time so you could use the same block for a few seasons if you ran it hard. does it have to be rebuilt every year? no. if you run it hard and keep it full of nitrous 24/7 then lol maybe. it was built with the idea of using the same LT block every rebuild unless catastropic failure occured. rings were gapped at .022 top and i forget the last gaps but the motor was built with the intentions of using Pro topline SBC converted heads this go around the first build was using 374 castings that were hollowed out and welded up in a few spots to gain more flow, had a SBC intake with a carb. ther is NOTHING about this motor that says you havemto run a carb, thast all up to you, still has a LT chain cover you just HAVE to use 95^ optis :) anything else you need ?

[jeremy stanke]

yea i want to still get it, just waiting on the money and stuff. im also currently selling my car so i can get a better base to start building on but who knows. i was thinking about just having it shipped though, after paying for gas and stuff it may be around the same price. could you get me a quote? thanks

[MeanGreen94Z]

werd, ill say 220 for shipping. even if you paid 3k for this thing its worth it. i had some woman offer me 1800 shipped and i LOL'd haha i sent a not so nice message to her on Ebay and reported it

[Speed Density]

Sweet deal on Meangreen being the previous owner.

If you are willing to pull it apart to acheive the right CC for stock heads then buy it up

[MeanGreen94Z]

its not bad to tear it down , all you really need is the rod torque # and i can get that, then borrow a bolt stretch gauge ( i think you still need to use one, maybe not since they have been run before and have been torqued but im not sure. jsut tear it down yourself and then take them to get milled and put them back in yourself :) and all the world is happy again, heck you could probably call JE with the specs and return them or get them to work all the hard calculations for you and make them right for cheap. but your best bet is a machine shop than can mill them down and get the best CC out of them.

[MeanGreen94Z]

are you gonna get this thing or not? i have a few offers on the table, and soon its gonna be gone... lmk

[jeremy stanke]

yea sorry about that, for some reason i never received any notices that this thread was updated.i just sent you a email before i checked here.