finally dyno tuned :) graph picture

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08-31-2010, 08:35 PM

#21

defconfire

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Join Date: Mar 2007

Location: Cary/Charlotte, NC

Posts: 3,791

Quote:

Originally Posted by ddmsgtr1

Is it just me or does this seem to show kind of a high bottom end for a centri blower that's probably being underdriven a bit to keep the peak boost down?

That was my thought especially being cammed as well. But underdriving the blower will not produce more bottom end. It will simply produce less boost across the board.

The only way to build/augment torque like that with a centrifugal blower would be to get a tiny pulley for the blower get a "relief valve" like what OXFORDGT had on his car before he got banned.

Last edited by defconfire; 08-31-2010 at 08:41 PM.

08-31-2010, 08:43 PM

#22

tbirdscwd

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Join Date: Sep 2006

Location: CA

Posts: 4,039

The graph doesn't look consistent with the mods this guy says he has at all. The bottom end looks really high for a centri car with heads and cams, the hp shouldn't be peaking that low either. Just cams alone had me peaking at like 6300rpm on 10psi procharged. And I made 421rwhp at that pressure running out of fuel and only seeing 14 degrees of timing. Don't really see a heads cam car running 9psi out of a D-1 only making 395 peak hp. Conservative tunes don't lean way the F out up top either.

08-31-2010, 08:47 PM

#23

defconfire

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Join Date: Mar 2007

Location: Cary/Charlotte, NC

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HOLY CRAP! I didn't even look at the AFR!!! that thing is gonna knock and blow itself to hell lol.

And I agree with the power being too low, MustangMan281's car is a cam-only AUTOMATIC which made 418rwhp on something like 8.43lbs with a safe tune aka (Rich).

Last edited by defconfire; 08-31-2010 at 08:56 PM.

08-31-2010, 08:48 PM

#24

gif4445

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Join Date: Apr 2008

Location: Nebraska

Posts: 1,546

Referring back to OP's original post.

Why would you even get a tune or have a car that has the potential to go BOOM if you "pound on it too much"????? It all just seems so shady to me

08-31-2010, 09:07 PM

#25

lizzyfan

Underboss

Join Date: Jan 2006

Location: Helaware

Posts: 20,273

Quote:

Originally Posted by quickndslick2

ok so i finally got my car back today like all of you stated with heads and cams on stock bottem end the tuner didnt want to give me such a harsh tune he said it wasnt even a mild tune he left it as baby as possible so i dont blow up my motor and even then he said i can still blow it if i pound on it too much im satisfied with what it made in the next couple of months i should be getting my built block in and switching pullies for a 15 pounds of boost

http://i128.photobucket.com/albums/p...untitled-3.jpg

08-31-2010, 09:46 PM

#26

defconfire

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Join Date: Mar 2007

Location: Cary/Charlotte, NC

Posts: 3,791

In all seriousness, all the BS calling and questionable numbers aside, just looking at the AFR. OP seriously needs to talk to his tuner.... Because that top end AFR is running lean like that is playing with fire. If not the bottom end is gonna look like this sooner than not.