ls2pontiac

iTrader: (1)

Can't figure out what to get, any suggestions would be appreciated. Right now I have 200cc heads from AI and not sure if thats enough. They were hogged out for N/A, but they told me they are good for 15psi and over 600 at wheels. Really no limit on cost, the higher it is will just take longer to build the motor. Hoping to get close to 700rwhp out of a 355..well, perhaps as close as possible like 670-680. Might add a 200 shot of nitrous on top of the boost if needed.

The blower is a D1 (oil-fed) unit with a custom FMIC and race blow-off valve...and I may send it to procharger and have them build it into a D1R as long as it doesn't hurt streetability too much and reduce reliability to a point of undriveable for more than an hour.

ahritchie

iTrader: (1)

I don't see any reason why the Ai 200cc would not be enough....with boost you are pushing air, not pulling it; so huge flowing heads are not as big of a restriction on FI motor; at least that's my understanding. Correct me if wrong FI experts...

Wicked94Z

iTrader: (26)

Silly, these heads will make over 1100hp in a streetable setup

ahritchie

iTrader: (1)

He's right: http://advancedinduction.com/Results/AiResultsMain.php

Why limit yourself to "just" 700hp

"FI's 9 Second LT1 Street Car! - Forced Inductions has pounded the rollers with 1012 rwhp / 909 rwtq SAE with their PTK 88mm Turbo setup on an ordinary budget Eagle 355 rebuild. This street terror runs our 200 cc ported GM LT1 castings, a 218/218 .544/.544 cam, 12 bolt rear end, and a D&D T56 6-speed. This is a full weight street car with a 3680lb raceweight! With Jose @ FI's experience its run a best of 122mph in the 1/8th and 9.871 @ 156.74 mph in the quarter! The fastest LT1 powered LT1 F-body ever! Click here for a timeslip of this record setting pass!"

Sc0tt30

iTrader: (6)

AI specifically told me their 200cc heads would not be a bottleneck with my F1A. I ended up going with their ported trickflows. It was purely my choice to opt for the trickflows.

Valkyn

iTrader: (8)

Not to hijack, but is the only difference between like an AFR 210 head and an AFR 227 the combustion chamber size? Or are they completely different castings?

And if you can pick any size for boost is bigger always better?

Wicked94Z

iTrader: (26)

227 is a different casting

ls2pontiac

iTrader: (1)

Well I just wanted to make sure because I noticed everyone seems to go with TrickFlows when doing a blower so I thought maybe i was missing something. I think I can squeeze 18psi out of the D1 oil-fed blower, or 20psi not sure as long as there are no other restrictions. Anything else I should be doing?

Wicked94Z

iTrader: (26)

I personally would like a thicker casting, just for the sake of head gasket sealing and maintaining a true deck surface.

Z28Roxy

iTrader: (4)

Those heads will flow enough but the big problem will be the CC size. If he has a 383 and "only" -20cc dished pistons he will have too high of CR for those heads.

Go with AFR 227s - I wish I had but I bought trickflows instead.

05HD

If you are set on a particular boost number, you should put more restrictive heads on.

If you are after 700 hp, the D1 will do it and so will those AI ported stock heads.