Fazz73jr

iTrader: (3)

Quick story on the car and plan. I bought a 95 z28 M6 with 104k. Engine spun a bearing and the previous owner got a good running pullout out of a 96 TA. Deal is I'm going to go through the replacment engine and he's going to have it installed.

While the engine is out I decided I'll build the bottom end first with a forged 383 kit. And leave the stock top end.

Can anyone tell me if I should do something else while the bottom end is out. And will I NEED a tune if all else is stock? Should I expect ~300hp outta it with everything else stock? Also can I raise the comp. ratio to about 11:1 or higher or should I leave it about stock?

Any suggestions welcomed. I'm new to LT1s but not new to engines in general. Looks like it's a basic sbc for the most part.

This car will be my daily driver. So I need it to be reliable. The car only has a flowmaster and a k&n

Thanks alot
Jesse

Wicked94Z

iTrader: (26)

you live like 15 minutes from me, I'm in upland... i'd be happy to help you out.

BLK,97,T/A,M-6

add arp bolts, and a new oil pump and id say your about good. Remember to prime the pump. Welcome to the LT1 crowd... youll love everything about the car but the ignition system.

Fazz73jr

iTrader: (3)

Thanks for the responces guys. And wicked94z I may be taking you up on that! Your car looks sick BTW! are those the centerline wheels?

My mom has a 02 SS 35aniversary edition convertable M6. It's bone stock except for a lid and a flowmaster. Just with a 383 bottom can I expect to keep up at least with it?

Wicked94Z

iTrader: (26)

thanks man, they're billet specialties street lites, i love these wheels man!

first off... goals for the car? really there's nothing you can do with a 383 than you can't do with a 355 unless you really plan on pushing the envelope (450+ rwhp) where the driveability will definitely be in favor of the 383.

with a good heads/cam 355 i guarantee you will rape MOST of the ls1 cars we have down here in so cal. Gotta decide if you want to stay smog legal or not. I've got a great guy here in upland to build you a motor, his prices are very reasonable and his work is absolutely top notch. I'll PM you my number...

Fazz73jr

iTrader: (3)

Thanks man, just PM'd you.

I have no real hp goals yet. I just want to keep up with BPU ls1 cars for now. Once I get my nova dialed in I'm sure the mod bug will come bit me after.

Will tuning be required for a 383 bottom and the rest stock? Also should I stay with about 10.4:1 comprssion or can I go up to about 11:1?

Thanks guys

Wicked94Z

iTrader: (26)

yea you'll need to tune. if you buy a cable for your 95 i can help you on the tune. 11:1 compression will run fine.

Fazz73jr

iTrader: (3)

Where can I get the cable? I'll be on touch with you for help. Will I neeed a wideband 02?

Fazz73jr

iTrader: (3)

Bump!!!

Fazz73jr

iTrader: (3)

Bump!!

RamAir95TA

iTrader: (2)

www.akmcables.com

Fazz73jr

iTrader: (3)

^ thanks for the link!!

Any hp predictions with a 11.5:1 383 and stock heads and cam, tune cai and shitty flowmaster cat back?
Thx

RamAir95TA

iTrader: (2)

383 with stock heads and stock cam? It will be a dog, probably comparable to a stock car.

Purple Poncho

iTrader: (1)

If you are going to do all that at the very least put a used cam in there.

Fazz73jr

iTrader: (3)

Yeah I'm thinking of an xfi280. What do you think?

I know the stock heads are going to choke it down a bit, but I have plans for some AFR's soon. Just need it running first.

RamAir95TA

iTrader: (2)

Along with a new cam comes other expenses too, like valve springs, rockers, retainers, hardware, pushrods, lifters, guideplates, and most importantly a tune. Not to mention the other necessary bolt-ons like headers that you do not yet have. You're looking at at least a thousand dollars plus for the cam parts alone.

Fazz73jr

iTrader: (3)

Yeah I know I got expenses for pushrods springs etc. But I figure the headers can wait and ill probably get a mail order tune from pcmsforless.

Stock unported heads are really gunna hurt me tho huh?

speed_demon24

iTrader: (6)

Do headers when you put the motor in and do the h/c together as a package, and I would look at other options besides AFR if you want to make power in a street car. Also don't expect do be any faster than stock shortblock car with the same mods.

Fazz73jr

iTrader: (3)

well it should be a lil more torquey than a 350 right? also the compression is bumped up a lil over a point over stock @ 11.5:1

RamAir95TA

iTrader: (2)

Yeah, but without the valvetrain to support it, all that extra cylinder volume won't be utilized.