Before and After Dyno

[XfireZ51]

Dyno results from beginning of tuning to last session.

http://i187.photobucket.com/albums/x198/Z51Xfire/604Dyno.jpg

~+20rwhp/+10rwtq

Changes include:

SW Xpipe
DynoMax Ultraflow w Z06 flappers
Re-ported IH's

I think if I went back again I would lean out fuel just a bit morew some more timing at lower rpms. However, one thing that is disappointing is that it seems from the graph that the dyno operator was lifting at about 6800rpm rather than going thru 7K. Looking at the slope of the curve (blue), it looks like the trajectory may have gone a bit higher. Note how the before ad after lines are increasingly diverging.

[FU]

20 + 10 that's nice work 1

[scottfab]

good AB test with actual data.
Data always beats "feel" for accuracy.

[Tony Davila]

Dyno results from beginning of tuning to last session.

I think if I went back again I would lean out fuel just a bit more, some more timing at lower rpms. However, one thing that is disappointing is that it seems from the graph that the dyno operator was lifting at about 6800rpm rather than going thru 7K. Looking at the slope of the curve (blue), it looks like the trajectory may have gone a bit higher. Note how the before ad after lines are increasingly diverging.

Most of the Tachs are off by 1000 RPM up high. My tach is off by 1000 past 7000 and 200 off at idle.

[rhipsher]

Still Dom at 434rwhp I wouldn't be complaining at all. And I take it that's without head work.

[RHanselman]

Very nice! now it's time for some boost!

[-=Jeff=-]

Still Dom at 434rwhp I wouldn't be complaining at all. And I take it that's without head work.

no, he has a set of GVD Ported heads on it

[XfireZ51]

Most of the Tachs are off by 1000 RPM up high. My tach is off by 1000 past 7000 and 200 off at idle.

Tony,

This was the rpm output from the dyno connected to ignition. You can see it with the lifting at about 6800rpm.

rhipsher,
Just to clarify, the motor has Pete's regrind for the intake cams, GVD ported heads and DIY top end porting. A few months ago I listed measurements I made on the GVD porting. In comparison to what Pete and Marc do for porting, I would characterize it as "conservative"(not in the political sense ;) ). Starts out at 36.5mm on deck and then necks down to 34 or so at the bowl.
I think all of the examples we've seen in the last year or so suggests to me that an aggressive head porting (36mm+) is probably the best bang for the HP buck.
It's my opinion that my current heads don't take full advantage of the cams. Having said all that, the 434rwhp feels pretty damn good.
BTW due to time constraints, these hp #'s were done with coolant temps at
193F.

[rhipsher]

Tony,

This was the rpm output from the dyno connected to ignition. You can see it with the lifting at about 6800rpm.

rhipsher,
Just to clarify, the motor has Pete's regrind for the intake cams, GVD ported heads and DIY top end porting. A few months ago I listed measurements I made on the GVD porting. In comparison to what Pete and Marc do for porting, I would characterize it as "conservative"(not in the political sense ;) ). Starts out at 36.5mm on deck and then necks down to 34 or so at the bowl.
I think all of the examples we've seen in the last year or so suggests to me that an aggressive head porting (36mm+) is probably the best bang for the HP buck.
It's my opinion that my current heads don't take full advantage of the cams. Having said all that, the 434rwhp feels pretty damn good.
BTW due to time constraints, these hp #'s were done with coolant temps at
193F. I gotcha! I'll bet the hp does feel pretty good. You outta be running in the high 11's to very low 12's if at all in the 12's.

[XfireZ51]

I gotcha! I'll bet the hp does feel pretty good. You outta be running in the high 11's to very low 12's if at all in the 12's.

Gotta get the power to the ground. Need DRs altho I will say the Nitto Invos on the car are a sticky street tire.

[Kevin]

Gotta get the power to the ground. Need DRs altho I will say the Nitto Invos on the car are a sticky street tire.

what do you think of them overall? i'm needing to replace the gsd3's

[XfireZ51]

what do you think of them overall? i'm needing to replace the gsd3's

Actually like them quite a bit. I looked at them since I have Z06 wheels and the Z06 guys had very good things to say about them. They're very good in the wet. Softer compound, ride great, low noise, good handling albeit may not be the ultimate sport tire ala PZeros for example. I got 2 front 18s for $370, the rear 19s were $280 each.

[Paul Workman]

Actually like them quite a bit. I looked at them since I have Z06 wheels and the Z06 guys had very good things to say about them. They're very good in the wet. Softer compound, ride great, low noise, good handling albeit may not be the ultimate sport tire ala PZeros for example. I got 2 front 18s for $370, the rear 19s were $280 each.

So, Dom...When we gonna see you on the track again???

P.

[XfireZ51]

So, Dom...When we gonna see you on the track again???

P.

When I can put DRs on this thing.

[Bob G]

They Don,t make 22" drag radials

[-=Jeff=-]

They Don,t make 22" drag radials
:sign10:

[XfireZ51]

They Don,t make 22" drag radials

Bob,

Why? Have you been looking for them?

[cvette98pacecar]

They Don,t make 22" drag radials

That is two damm funny.

[Bob G]

You can't loose with 22's But you get all the whores with 24's

[FU]

Nice shot ! Mark up one for Bob ! :cheers:

[RHanselman]

So Frank, when are you getting 24's??

Heheheheheh...

[FU]

So Frank, when are you getting 24's??

Heheheheheh...

We don't do 24's here in the R\redneck part's :cheers:

[XfireZ51]

We don't do 24's here in the R\redneck part's :cheers:

OH YEAH FRANK. Like Bayshore, Long Island is Redneck Country!!! Give me a break! :sign10::mrgreen:

[RHanselman]

OH YEAH FRANK. Like Bayshore, Long Island is Redneck Country!!! Give me a break! :sign10::mrgreen:

I was thinking the same thing!

[WydGlydJim]

Frank's like a Redneck Guido or sumpin...........
:-D

[FU]

My buddy's and I are considered redneck's as to compared to the liberal gonad stroker's around here ,and we party like there's no tomorrow. Right Ron ?
Babylon & Bayshore are 2 different towns. Like comparing Bedsty and Bensonhurst.You haven't been gone that long Dom or have you ?

Now leave me alone.......Dr. Oz is on.

[RHanselman]

This morning i was reminissing of Boats, Vodka and LI friends... Got's to do it again!

[FU]

This morning i was reminissing of Boats, Vodka and LI friends... Got's to do it again!

The welcome matt is out. We were talkin about that night last week while picking on cousin Mikey.