lusting4ls1

iTrader: (15)

Going with a 383 ls1 for my TA and don't have the coin for AFR or trick flows. Would these heads along with a Fast or Bbk intake and custom cam be a good combo?

Would like upper 400hp range with a good healthy tq curve. Compression will be around 11:1 and be a mostly street driven car.

Or would the AI 232cc heads be better or am I way off track? I tried searching,but everyone is iron block 4" bore crazy, so not a lot of info anymore on the little aluminum 383.lol

Grr

iTrader: (2)

Would work just perfect in that setup. Not a whole lot of difference between the 226, 232. I would personally use the 232 for that motor. It wont have a problem getting around 500whp I think
Staying with teh TR230?

badazz81z28

iTrader: (6)

I think if you are on a budget, Texas Speed PRC LS6 heads will be the best bang for the buck and over all less money than AI.

You will be comfortably over 400 hp with a mild cam.

garcr4

iTrader: (1)

Our carbureted 383 with AI 226 heads and 600 lift cam made 570 flywheel HP and almost 500 lbs ft of torque. Compression was 11 to 1. This was used in a road race application.

My view is that the 226 heads will be excellent for what you are looking for.

badazz81z28

iTrader: (6)

Ehhh....I think 500 ponies to the ground is pushing it for a 383. I think you would be close at upper 400s.

lusting4ls1

iTrader: (15)

Great info guys. I was hoping I was on the right track.

Nah, the tr230 won't be going in the 383. Too small, even though I love it in stock cubes. I'll be getting in contact with Predatorz or PatrickG for cam selections.

lusting4ls1

iTrader: (15)

I would definitely be happy with upper 400's as long as the tq was close too. I know a lot of that will depend on the cam, just want to make sure I have the right idea for head selection.

Grr

iTrader: (2)

in a properly setup M6 car on a dynojet with 226's or 232's and a decent cam, it should be EASY 470+, and I dont see 490-500 out of the question. Hell the AI heads/cam package on a 346 will do 460-470

lusting4ls1

iTrader: (15)

That's definitely encouraging.

01ssreda4

iTrader: (96)

The AI heads make tons of SOTP midrange torque.

dr_whigham

iTrader: (49)

On a 383 I'd go with the 232 hands down. I don't think the mystical 500 is out of the question at all. Depends on what you're willing to spend... The fine details.

RTBenny

I'd be interested to see what this makes. I'd love to ditch my supercharger and make 500whp NA with my 383.

JakeFusion

iTrader: (7)

People make 500+ on LS2s with Ai 226s and 230 duration cams. 500 with the 226s on a 383 is no problem. I wouldn't worry with the 232cc unless Phil says it's worth more than 5HP.

RTBenny

I wanna make it through a stalled 4l60 though. Still doable?

dr_whigham

iTrader: (49)

It's the same price

This is a slightly larger version of our 226cc CNC work that has consistently outperformed other CNC'd GM castings on the market, as well as most aftermarket casting based heads. The 226cc work being only slightly larger than the as cast port, would often leave some areas in the intake port untouched by the CNC cutting tool. While this is aesthetic and does not negatively affect performance, this slightly larger version will minimize or eliminate these areas of "non-cleanup." Most applications will not be negatively affected by the slightly larger intake port, and LS2's & strokers will pick up another few HP over the standard 226cc CNC work.

JakeFusion

iTrader: (7)

Either way the 226 will get you there.

lusting4ls1

iTrader: (15)

I saw the 232's and thought about them, but couldn't find anyone using them. I wondered if the 232's would better suit the cubes?

JakeFusion

iTrader: (7)

It won't hurt anything, that's for sure. But the point I was making is that with a smaller engine (albeit with a slightly larger bore) and a pretty mild cam (232/236) you can do 500+ with the 226s. You just have to make sure the rest of the setup is good.

You can't go wrong with Ai.

dr_whigham

iTrader: (49)

Jakes right, but at the same price and a stroker motor no less, I'd go 232. Send an email to Phil or call. He definitely won't steer you in the wrong direction.

muttstang

iTrader: (1)

I sent Phil a pm a week ago about the 226 and 232s on my lq4 build...but no reply yet. I like the idea of the 232s though for sure!