buffhomer

ahahaha Holy hell that's a good one!

InsomZ

iTrader: (1)

i did watch the car dyno.. and no i didn't hear the system come on.. i didn't claim that they sprayed. I just mentioned that the NX kit was there.

i did notice the air fuel got gradually leaner each run.. stayed in the 14.0-14.4 range

Lou claimed on the vette site it was 13.7 air fuel which is still lean but i watched each run and didn't see 13 anything.. that is all.

to be honest i'll buy the heads myself if they prove to consistently get 30rwhp+ gains on customers cars once they are finnally released.

KAOS

iTrader: (5)

look at dyno sheets of AFR heads on old 350s and 400 small blocks. AFR heads are no joke they dont play around, these numbers are the real deal. just watch how everybody else does on the dyno, it will be close numbers all the way around

kumar75150

what about the LT1 AFR heads?

no joke huh

verbs

KAOS

iTrader: (5)

my bad, its not my fault that afr heads for the lt1 arent that great. just have a little faith in AFR it will work out, at least i hope so

under_construction

iTrader: (1)

FWIW the car was running cats and a full exhaust system - magnaflow C5 cat backs, which do not have a reputation for being the most free flowing. On the dyno it was quiet, but quick. Good numbers, mybe not great, but then again they do not cost $3500 either. The cnc port work and chamber finish were very good. We should know more soon as they hit the ground in the next few weeks.

Elysian

Those are some spetacular numbers for such a small cam. I'd want to see more setups like this before I'll believe it. Question - the heads started off at 205cc, but is that before or after they are ported? Patriot LS6 heads are pushing ~230cc & flowing around 320cfm. Has anyone hit hp & tq #'s like these with Patriot heads and a 224 cam?

verbs

BTW, no one mentioned what compression ratio this car was running at?

Those numbers are great, but running at a 14.2-14.4 A/F ratio using a shortbelt, and running cats make it hard for most of us to really compare. Just seems like an odd combination. Again, it'd be great to see before and after heads numbers with identical mods in both scenarios.

BurnOut

iTrader: (1)

The deal is that the heads are cast to 200cc, and the CNC program takes them to 205cc, hence the high velocity (look at the torque).

I have heard that there may be an AFR 205/big(-ish) hydraulic cam setup being assembled within the next week or two. I don't want to steal anyone's thunder nor make any promises, so I'll let 'em post up if they want to.

SScam68

iTrader: (20)

Vital Specs..................LS1......AFR
Intake Port Volume......201......205
Intake Valve Size..........2"......2.02"
Exhaust Valve Size......1.6"....1.55"
Chamber Volume........67cc.....66cc

JZ'sTA

iTrader: (23)

I have never seen that high of a dyno with that cam. The best numbers I have seen are in the 430 range and that was with a M6 stock rearend, and open headers.
BTW it was a stage 2.5 6L head from AS and was 10.5:1 Compression. (Somewhere in that area cant remember exactly) I really dont believe these heads are 30+ HP better then the top LSx porters heads. Not saying they aren't better but think of it this way.

How many of us have done complete bolton's using the most popular 224 cam and stock heads? Then we save some more cash up and but heads. We are going from a stock LS1 head to a stage 2 or better 5.3/6.0/ or LS6 head. How many of us have then gained a extra 30+ HP just by adding heads? There are quite a few.
As said before the top dyno numbers are in the 430-440 area. This would mean that the AFR heads would have to be twice as good as stage 2+ heads from AS or TEA to achieve another 30+ on top of the best porters.
We all know the more power you make the harders it is to get every HP.

For us LS1men hopefully other's get the same dyno results but I would defentially drop a cnote against that.

Ravenous T\A

iTrader: (12)

i think they had a 50 shot on that puppy, insom said never did they mention the noid at the dyno until he brought it up to them, then they said they wouldn't be spraying. Then he asked them if they were running out of fuel injector cause of how lean it was running and they said "it makes the most power runnin that lean". Yea if you like a hole in your piston!! it hard for me to trust those BIG numbers with all the sneaky stuff around it, makes me think twice

C4VetteLS1

I think you all are just looking for reasons to pick apart something you dont understand.

Comparable flow #'s with 205cc port volume can = BIG #'s with a smaller cam.

Basically allowing a smaller cam to be more effecient with head optimized for it (I.e. AFR 205cc's)

What till 225CC AFR's come out and 500 rwhp stock bottom ends become a reality (the ones that have done it wouldnt make 500 rwhp without dyno tricks and on a more "realistic dyno").

So when people start making 500 rwhp on my dyno with AFR 225cc setups...im going to cry after all the money ive spent on ported ls1 heads...but hey im just happy AFR stepped up with these new heads. If it wasnt for them we'd be stuck with what we have, AFR's are giving us all a whole new realm of horsepower gains. What till TEA gets thier hands on a set, its going to be scary fast.

Have you ever seen TEA's stuff on SBF's? No stock head will touch thier #'s in that realm, so what till they get 350-360 CFM out of street AFR heads with 220-230cc port volumes (about the same as current ported ls1/ls6's)


Everyone just step back, quit calling "BS" and wait a few months till we see dyno #'s popping up everywhere with AFR's...

Cobraeater

I was there at LG Motorsports when Tony dynoed the Vette, and there was something strange going on.

Right before Tony dynoed, he drove the car out of the shop and was gone for about 15-20 minutes before he threw the car on the dyno.

I think he said he was getting gas, but the car would have had enough for the dyno.

He also didn't mention anything about the NX kit on it, and on the dyno it was hard to tell if he was spraying since he had cats on it with a quiet exhaust.

I would wait for numbers from other cars just testing the heads alone before buying them myself.

I saw the dyno graphs of the runs and the a/f was 14.1-14.5 on all the runs.

Ravenous T\A

iTrader: (12)

alright I shall hold my tongue for now, but don't get mad at me if people don't produce those great numbers with that same set-up and I say "I TOLD YOU SO", I just want companies to be honest when they go to show off their product and not paint nitrous noids black and hide the wires, that stuff makes me distrust that company. That kind of stuff is for street racing not product display.

z98

R>C>P

Even a 50 hp nitrous hit would add 80+ ft/lbs at 2800 RPMS.

There was probably no shot of nitrous during that run.

Ravenous T\A

iTrader: (12)

Oh lemme ad too, I was there with Insom, I saw the dyno, I saw the noid, I saw the AFR, it 14.7 on one run, and it was strange about him leaving the shop for 20min, maybe he did get gas, maybe the bottle wasn't warm who knows, but I know he was kinda peeved about insom pointing the black noid out and acted little pissy when we asked if he was running out of injector cause how lean he was runnin.

InsomZ

iTrader: (1)

i don't think they went to get gas cause they complained to Lou about it having the california 91 octane in it during the dyno runs..

i jokingly said their going to change the jets when they left for 20min.. just about all of the vette guys there were crackin up

there is a jump of 50 rear wheel torq from 2,800 to 3,000rpm on the dynosheet they were handing out. 200 rpm 50rwtq.. i dunno maybe thats normal. the AFR guys did act kind of ticked after i pointed out the NX kit.

SScam68

iTrader: (20)

it looks like they didn't even go WOT until 3500rpms, notice how the torque is constant and the power is almost linear

do a search and learn how the power is calculated

I suppose the head shootout done by MM&FF with AFR'S heads on top on almost all catorgories was also just a fluke

NOW THIS is a nitrous spike http://www.fototime.com/F3DC50D0EA6C377/standard.jpg