427THIS

You guys kill me. When AFR heads first came out everyone was crying for some stock dyno numbers on a stock car. Well now you have them and your still crying about this and that. We now have stock numbers and now can calulate hp potential from bolt ons etc.

mrr23

iTrader: (3)

this wasn't a test to compare it to other aftermarket heads. but other are making those conclusions. it was to compare it against a stock 03 LS1 head. in talking with roger, he thinks the the runs were made in 2nd gear. the reason for dynoing in 2nd gear is to give the longest/ broadest graph possible. he won't be back in the office until monday to verify this either. this would explain the so called low numbers. i will post when i get this answer. just another reason to not worry about the actual numbers. just the actual gains.

66deuce

iTrader: (1)

good gains IMO.some people are caught up in peak numbers,i'd bet the low-mid range showed a greater improvement.DYNO NUMBERS AREN'T EVERYTHING.yes,the AFR are expensive and are not for everyone,(i don't have the money for them)but high 12's with the factory cam, exhaust and tuning is pretty good.

mrr23

iTrader: (3)

i don't know for sure. but isn't high 12s in the Z06 area stock?

mrr23

iTrader: (3)

well, car and driver posted up 12.7 for a 2001 385 hp Z06 and 12.4 for a 2002 405 hp Z06.

Sport Side

iTrader: (6)

Nice gains. Great comparison. Test really shows what these heads are capable of. Props to you guys for doing it.

66deuce

iTrader: (1)

yes,Z06s are around mid-high 12s stock.but they are also a little lighter than a standard vette,and have a little more gear(3.42s or more?).so you have vette with an A4,2.73 gears with the only mod being the AFRs running high 12's.pretty good IMO.

DanZ28

iTrader: (5)

Couple questions since you cleared up the tuning:

What was the AFR before and after?
What was the DA and temp before and after at the track?

Thanks,
Dan

bigdsz

iTrader: (1)

mrr23, I'll tell you what is irritating is that for the past year or so that Vinci High Performance has been a sponsor on this site you have been a product ***** and it is really disgusting. Vinci makes none of the parts that you and a few others tout. All I hear is Vinci this and Vinci that, They are installers and that's it. You titled this post Vinci AFR heads, did Vinci do any port work,or any other type of work on these heads, I doubt it. You talk about Vinci cams, Vinci accelerated lift rocker arms, Vinci valve spring compression tool, ad nauseum. These are Crane Engineering products, tell it as is. People DO respect honesty, not HYPE.

Lady Redhawk

iTrader: (6)

I read this whole thread. What is so hard to understand about apples to apples comparison? Sorry, I don’t “get it”. 40 RWHP gain with heads only and nothing there to help them breath is great. Thanks mrr23 for the test, and I do “get it”.

PREDATOR-Z

But that is why I'm sitting here, both scratching my head and laughing at the narrow mindness of some poeple.
The whole point is NOT how much hp the vette made but IS how much difference in hp between UNTUNED stock VS UNTUNED AFR swap >>>>>40 hp.
Now how hard is that to understand?

Sport Side

iTrader: (6)

Too hard to comprehend

bigdsz

iTrader: (1)

No, the point is that the car should have been optimized, tuned if you will, before and after the install. Think about it logically. It's clear that the before performance was subpar.

Lady Redhawk

iTrader: (6)

I don't know.....maybe too much Happy in the Happy New Year or something. Give them some time....they will be all right!

Lady Redhawk

iTrader: (6)

Bad tune vs. Bad tune = apples vs. apples

Stock heads vs. AFR heads = 40 hp gain

PREDATOR-Z

Is it a VINCI tool???

WTF does mrr23 advocating a sponsor has to do with this post?

And for your info VINCI and CRANE did R&D for the programmer, Accel Lift Cams and rockers.
Otherwise TR cams are not TR they are Comp Cams. So your arguement is meaningless and inferior.

You are personally attacking mrr23 for posting about an independent 1 for 1 head swap. Why? I don't know, but it is not warranted IMO. So unless you have something smart or perhaps other AFR (or any other heads) comparison to post. Relax, you are making a fool (s) of yourself (s).
That being said mrr23, please let us just ignore these folks and concentrate on these interesting findings. You have nothing to prove to them anyways.

PREDATOR-Z

What head gasket was used in the swap??

SouthFL.02.SS

Exactly.

bigdsz

iTrader: (1)

There is no problem with anyone promoting a sponsor's product, that's why we are here on this board to learn about what we can do to improve our cars performance. However, when some one repeatedly touts product[s] and it becomes obvious that all they are interested in is promoting one firms products, then someone has to call BS. It surely would be in VHP interests to request this over promotion to cease.

mrr23

iTrader: (3)

well it's not their product. it's an independant test of anothers product. besides, what do advertisers pay for on this site? just to have their name on the right side? and no, someone doesn't have to call BS just because someone is promoting their products when they pay to. only you seem to want to call BS for that reason. maybe because you are a fan of norris, a competitor in the same location of vinci. i don't see you calling BS on NLP (mike no jab at you, just a comparison) stuff. like when he promoted the cam and blower he put on larry skippers car. to you it might be an over promotion. it's nothing more than a discussion. if you don't like the so called over promotion, then do what you have the legal right to do. don't click the thread. just like TV. don't like the programming, change the channel. the rest of us will just keep on discussing the matter.