I went to the corvette dyno day today.. i have a few pics.. including the AFR dyno sheet.. sorry for the poor quality.. camera phone..

i noticed a few things on the AFR car.. that could inflate the #'s a little..
LSX 78mm port matched intake
Meizer Eletric water pump
Short belt
NX wet kit.. black wire loom.. stealthy install but i noticed the black solienoid and black wire loom covering everything going up to the power plate
I pointed it out and they said they wouldn't be spraying today.. jetted to 150 shot they said..
specs on the cam i believe were 224/222 .581/.581
the car dynoed very lean 14.2-4 AFR @ WOT i asked why its running so lean they said it likes to run lean..

the car dynoed 468rwhp/429torq w/ this setup.. so if thats on motor w/ the 150 shot it should be over 600rwhp

i'm not knocking the heads at all seeing in person their great quality.. i'd just like to see before and after dyno's where the only difference is the heads.. all those lil extras add up.

the cam they have is the same spec pretty much as my friends TR224 thats making 380rwhp.. i doubt a set of heads alone would get that to 468rwhp.. 88rwhp gain

 

Sounds pretty impressive to me considering the size of the cam, even despite the "tricks".

Josh

 

That is very lean, but those #'s are great for that cam. I wonder how lean the car is on the street????

 

i loved out the g5x3 in the black z06 sounded .. sounds sooo mean

 

This was where?

Tony Mamo's personal car?

 

it was the Silver c5 w/ z06 chromies

 

Low/mid tq looks really good assuming it's a 346.

 

agreed. i'd like to see the dyno with ls6 intake, stock waterpump, and no shortbelt.

 

Corvette Fever or Vette Mag has engine dyno results going from a stock engine with exhaust full bolts ons etc to just an AFR head swap to an AFR and "224" cam.

Here is a link to a writeup in CF

http://forums.corvetteforum.com/zerothread?id=819571

Difference in power between the AFR and LS1 head, tabulated form
Power
RPM..........LS1..........AFR......AFR w 224.....LS1-AFR...LS1 -AFR 224
3.0............214..........217...........229..... ......3................15
3.5............257..........262...........274..... ......5................17
4.0............307..........323...........330..... ......16..............23
4.5............361..........375...........381..... ......14..............20
5.0............401..........427...........447..... ......26..............46
5.5............415..........451...........486..... ......36..............71
5.8............421..........455...........499..... ......34..............78
5.9............420..........458...........502..... ......38..............82
6.0............415..........457...........505..... ......42..............90
6.5............393..........451...........507..... ......58..............114

Torque
RPM...........LS1...........AFR....AFR w 224..LS1-AFR.....LS1 -AFR 224
3.0............375..........379...........401..... ......4.............26
3.5............385..........392...........411..... ......7.............26
4.0............403..........424...........433..... ......21...........30
4.5............421..........437...........441..... ......16...........20
4.8............426..........452...........462..... ......26...........36
5.0............421..........448...........469..... ......27...........48
5.5............396..........430...........464..... ......34...........68
6.0............363..........400...........442..... ......37...........79
6.5............317..........364...........410..... ......47...........93

 

cant wait to see some track times w/ those heads.

 

when the hell are they supposed to go on sale?

 

I've been wondering this also. These heads are the reason I still have a bolt on only car. They need to give us atleast an estimate on a release date.

 

The heads are on sale.
Yep thats right you can buy them right now from a number of places.
The problem is geting them.
J/K guys.
I cant wait to see some new numbers as well.
I spent 5 G's in heads in the last 6 months for my 2 cars and damn am I gonna be pissed if these heads kill the ported LS6's. I will have to spend more money again.

 

Has anybody noticed they had a hiddin nitrous noid!!!! to me those numbers maybe a little inflated. No telling how big of a shot they ran.

 

We would have to factor that into any track times they produce with this car.

 

But look at the dyno sheet, look how it spikes right above 2800rpm's(torque). To me it looks like those guys hid a nitrous system to hype there numbers up.

 

Lol, that motor wasn't sprayed. The graph looks nothing like one on the bottle.

 

oh brother , I supposed they juiced the engine in the Vette rag to.

 

draw your own conclusion.. i know for a fact I and several other saw the NX kit on the car.

they might not of used it.. but i'm waiting for some #'s from customers before i draw any conclusions

the same cam in a full bolt on car w/ stock heads would be around 380 to 400rwhp... ported lsx maybe 410.. mezier pump what maybe 5.. short belt another 5.. so lets say w/ all that stuff on stock heads 420rwhp...

so lets see if others get a 48rwhp or more gain from these heads.

 

Insomniak did you watch the car dyno?

Did you hear the system come on?