popo8

Ok... my friend is now buying all of my stuff that I was gonna use on my build, and is planning a build on his Z28. Gonna be a 383 Stroker LT1.
Build sheet listed below. Let me get some of ur Educated guesses on what kinda power at the rear wheels through his M6...please.


BUILD SHEET:

PSC1 Procharger 10-12 lbs of boost
INTERCOOLER
MSD 6AL
MSD Blaster coil
MSD BILLET OPTI
60lb Motron injectors
4 bolt main corvette block
cleaned
bored .030
align honed
square decked
cam bearings and freeze plugs installed
scat 4340 forged crankshaft
scat pro series I beam rods - 2-ICR6000-7/16
srp forged pistons - 14cc inv. dome
clevite 77 H-series rod and main bearings
Total seal rings
rotating assembly balanced within .1 gram
melling hv oil pump
melling pick up screen
melling hardened oil pump driveshaft
fel pro gaskets
custom ground hyd. roller camshaft
comp cams roller lifters
comp cams hardened pushrods
aluminum full roller rocker arms
chrome valve covers
clevite 77 hp cam bearings
pioneer brass freeze plugs
cloyes roller timing set
lt1 timing cover
lt1 oil pan
arp head studs - 12pt.
fully ported lt1 heads
2.02/1.6 valves
stainless steel valves
isky .600 lift springs
combustion chambers polished
will out perform lt4 heads.
fully ported lt1 intake
runners matched to heads
BBK 58mm throttle body

VK

600-700 assuming a perfect tune.

joe-96z1le

Unless I'm missing something, the CR looks like it's gonna be a bit high. A 383 w/ 12 lbs boost and only -14cc on the pistons? CC's on the heads?

popo8

not sure...got a guy that "knows what hes doing" working a set of stock heads. Syas he can make em better than LT4 heads....

And Im thinking compression is like 9:1 ish

blown383

Mid 600hp. =)

Few notes:

1) You might look into the piston selection. On my 383 I went with a set of -22 to get 8.6 to 1 compression ratio.

2) Check and see which Melling high volume pump he is going with... go with the "Select" series which has 5 digit code because the standard high volume pumps have a thinner casting and prone to failure.

3) Make sure the engine builder tacks on the pick up tube to the oil pump since they're prone to falling off.

4) If you're going with a high volume pump you're going to need a larger pan like a Canton or moroso... or risk sucking it dry.

5) Do you have a fuel pump to feed those 60lbs mototrons?

6) Consider ARP studs for the mains.

-B

popo8

1, Im pretty satisfied with 9: 1 compression but I appreciate the insight
2, I believe that is the oil pump he is using
3, wasnt really concerned with it, because soon as the motor arrives, I plan on pulling the pan to check it out, and if its not tacked, Ill do it myself.
4, As far as oil volume goes, I was going to add another remote filter to bump up volume, car is lowered 2" with a tubular kmember, so I risk damaging a bigger pan.
5, Ill run the stock one in the tank as well as an aftermarket one in line.
6, all studs will be ARP

Thanks I really appreciate all the feedback so soon.

joe-96z1le

Without knowing the combustion chamber volume you don't know the CR. But with a 383 and -14cc pistons, zero deck block, bet you're easily over 10:1 no matter how much work is done to those LT1 heads.

popo8

None the less... I still started this thread to get guestimates on RWHP, so what do u think....

leadfoot94

Right around 10.8:1 from what I computed. Defintely not the most boost friendly. That's assuming:

Combustion chambers are ported to 58cc's.
4.030 Bore
3.75 stroke
0 decked block
Felpro Head gasket (.039)
-14cc pistons

I would certainly look into a meth/water injection set-up with that CR, if he's lookin for that much HP - just to be safe.

joe-96z1le

To give a good est. you leave out some important factors. Will this be pump gas or race fuel? Large FMIC or the twin hi-flows for an LT1? Cam mild or wild? Is your friends car an M6 or auto?

If you run pump gas only, I think you'll crack those SRPs and never finish the dyno tuning. If you run race fuel or/and water-meth inj. I think you'll hit the mid 500s on an M6 car.

popo8

I wrote that its an M6 in the beginning. Plans on staying 93 octane (hence the lower compression) with the option of race fuel..... Its a single itercooler mounted in the center, and i have pics of the build on my cardoamin in signature....