Elysian

379.2rwhp @ 6400rpm & 334.9rwtq @ 5300rpm on the Mustang Dyno at AP Engineering. I have 300 ft/lbs above 2700rpm and the torque "curve" is more like a flat line.

Stock shortblock, and here are the mods:
Race ported AFR LT4 heads, 280cfm @ .6; port matched intake; 58mm TB.
233/239 .569/.577 XER Comp Cam.
Hooker longtube headers; "catless" y-pipe; Corsa catback.
K&N filter & airbox.

A while back, I was having some valve-float issues. I got some new springs put in and went back to AP to make sure the problem was corrected. The motor pulled strong to 7000rpm.

Chris at AP Engineering said he's never had a stock-cube LT1 car put down 400rwhp on their dyno. I think I could get pretty close. For one - I have a Ford 9" - I'm thinking that sucks up a little more power than a 10 bolt. For two, I could swap over to 1.7 ratio rocker arms from the 1.6's on there now. For three, I have some KOOKS 1 7/8 stainless headers waiting to go on. I could also throw on some underdrive pulleys and an electric water pump. Anyone else think 400 at the wheels is attainable?

Worm

iTrader: (2)

I would say its definately attatinable, that cam is weird are all LT1 cams like that?

BizZzatch350

iTrader: (33)

Thats making some power for a 9 inch and on a Mustang dyno. That 9 inch is killing some power, but oh well who needs dyno racing. Great numbers, esp for such a medium size cam

Elysian

They are usually split in favor of the exhaust b/c LT1 exhaust sides suck. With the AFR heads it really wasn't necessary, but it was a cheap shelf cam.

stik6shift93

I don't know if you were being sarcastic about the 9inch taking a little more power than the 10 bolt, they suck up around 15hp at the wheels on a dynojet. Right there you'd almost be at 400. Very impressive numbers what size were the heads?

Elysian

195cc's. 203 after porting.

Beast96Z

iTrader: (21)

I don't think you'll get to 400 on a mustang dyno with the stock bottom end. The 1.7's will prolly hurt more than help your situation. The same thing goes for the 1 7/8 headers, then again the LT-1 headers should be stepped to 1 7/8 which would be better than straight 1 7/8 on a SBE. Your deffinatlly making damn good power like you are, and personally, I would leave a good thing alone.

Worm

iTrader: (2)

I was referring more to the duration seeming alot compared to the relatively small lift #s. For instance my cam going in this month is 232/234 .598/.598 112LSA.

Elysian

The heads stall out at 280cfm at .600 lift. I had them flowed up to .700 (in case I ever wanted to go solid roller) and they picked up 2cfm. At the lift I'm running, they're flowing around 275cfm. Not too much need for radical lift on these heads, IMO.

GTS346

iTrader: (1)

58mm throttle body would be holding back a bit of HP wouldnt it?

Elysian

Arizona Speed and Marine offers a "monoblade" throttle body that, in theory, flows a little more air than the twin 58mm, but I've never seen any documentation to the effect that you pick up power on a stock cubic inch motor by switching to it. And the cost is prohibitive - like ~$600. It looks nice, though . . .

You can find a picture of one on the site below:

http://www.tbyrnemotorsports.com/lt1...tionsuper.html