Steal of a Deal! LT4

[MunsterZ28]

ive seen that on craigslist, wish i coulda picked it up

[kyleozzie]

Btw, a splayed 2-bolt main block, is stronger than a stock 4-bolt block.

hmm well i might just go that route then... but i have changed my mind on building the 383.. i just cant afford it right now so i am just going to make it into a 355.. and just rebuild it.. would love the 383 but i want something that i can drive and not worry about to much going wrong..

[ThreeHonks]

Now send those heads and intake off to A.I. and get a CNC port job on them! Those LT4 heads are really potent when ported

[MunsterZ28]

Now send those heads and intake off to A.I. and get a CNC port job on them! Those LT4 heads are really potent when ported

u r correct sir, i have seen it first hand

[ThreeHonks]

Horsepower is in the heads. If you have the money to do a 383 and do it right then go for it!! But if you send the topend out to A.I. and got a bigger cam to go with it you could make some serious power on a stock shortblock.

Just rebuild the motor with new bearing, rings, and ARP rod bolts. Get everything checked by a QUALITY machine shop. Have them balance the rotating assembly again, it can go a looong way.

This is just my opinion on what I would do. Good luck with your build

[kyleozzie]

Horsepower is in the heads. If you have the money to do a 383 and do it right then go for it!! But if you send the topend out to A.I. and got a bigger cam to go with it you could make some serious power on a stock shortblock.

Just rebuild the motor with new bearing, rings, and ARP rod bolts. Get everything checked by a QUALITY machine shop. Have them balance the rotating assembly again, it can go a looong way.

This is just my opinion on what I would do. Good luck with your build

I Feel stupid for asking but what is A.I?

[DETROITMUSCLE]

I Feel stupid for asking but what is A.I?

A.I. is a shop that does head porting and other stuff it stands for Advanced Induction, I have only seen amazing results from their port work.

[JoeliusZ28]

I Feel stupid for asking but what is A.I?

advancedinduction.com

i have one of their cam kits

[kyleozzie]

advancedinduction.com

i have one of their cam kits

how do you like them? but i believe it was adam green that told me to talk to you about a cam for my car because i am not going to use the lt4 hot cam i want a better one so i have been looking up cams and i see there are 3 basically people use cc503,cc306 and gm847 what one do you recomend or another one? i have been leaning twards gm847 but its a pretty radical cam and even with my lt4 heads i dont know if that would be good enough it might actually hurt me power wise???

[Boost Addict]

I've got the 847 and am running Dart 200cc heads

[kyleozzie]

I've got the 847 and am running Dart 200cc heads

200cc hmm i think the lt4 heads are only 185cc from the factory.. so would i need to get them ported and polished?

[Boost Addict]

200cc hmm i think the lt4 heads are only 185cc from the factory.. so would i need to get them ported and polished?

I couldn't tell you. I just figured I'd throw that out there. Then again I'm F/I so it's probably a whole different ball game.

[Fbomb]

I've heard not to go bigger than 190cc intake runners for a sbc but it's all about torque and how well your motor will breathe in the upper revs. With 200cc runners you might lose bottom-end due to less velocity but it will flow better at the top. Then again if you put a more torquey gear in the rearend you could get away with it.
I think it'd be fine with 200cc

[ThreeHonks]

I have their 200cc heads and am happy with them. The ported LT4 heads from advanced induction flow about 300cfm at .600 lift. Call either a.i. or Lloyd Elliot and get a cam made for you. If you put that hotcam in, everything else would be a waste IMO

[JoeliusZ28]

all depends what you want. My cam is considerably smaller than an 847 but probably doesnt run all that much slower. ive got the 226/234 and my car really pulls from 2500 RPM up... whereas bigger cams are much more peaky. for a while i thought i wanted bigger but the midrange power really makes the car fun to drive.

I ran a best of 12.96 @ 112 this weekend but my fuel pump was dying and i actually lost power momentarily on that run... let alone the fact that my tune is a blind guess until i get a wideband.

here are a couple of vids of my cam

http://www.youtube.com/watch?v=7h1sKiD8ZL8
http://www.youtube.com/watch?v=C1GYws9Wso0