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Pettit Racing’s Forced Induction System

 
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Old 02-09-2008, 08:16 PM
  #1201  
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Anyone going to that Deal's Gap rotary rally?

https://www.rx8club.com/deals-gap-rotary-rally-111/dgrr-2008-offical-list-attendees-130025/

I'm planning a trip up to TN/NC/VA that weekend, so the wife and I may stop by and check it out.
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Old 02-09-2008, 10:14 PM
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Originally Posted by dannobre
You need to get a logger to record your A/F...won't have to try and watch you little screen
suggestions on a logger?
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Old 02-09-2008, 11:16 PM
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Originally Posted by Charles R. Hill
Use Chuck's Hymee.
+1
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Old 02-10-2008, 08:45 AM
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Google crecorder--very interesting ob2 data collector(x 24 hrs) for $80.00
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Old 03-16-2008, 01:19 PM
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A sort of dyno....

Stage 2 with stock ECU reflashed (February 19, 2008 install by Pettit)
This chart shows a funny dip in the curve, I have spoke with another local owner who does not have this dip.
My blower drive belt was also loose in this run, I suspect it was causing the dip @~6k
Or, it may have been the Citgo gas I was forced to stop for on the way there.
(Claimed to be 93 octane)
I will post another chart later, when I can afford (and make time for) another dyno charge.
This chart is NOT an official chart from Pettit.
I found this Dyno near where I live. ($80.00 for two pulls)
And no I did not let them spin my lil baby to 9K while stationary; though I do "shift at the 9K beep" many times when driving.

Last edited by Rote8; 10-16-2009 at 05:12 PM.
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Old 03-16-2008, 01:46 PM
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APV opens up 2 additional ports at 6000 rpm. You usually see a dip at those point.

Are you MT or AT?
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Old 03-16-2008, 02:55 PM
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Originally Posted by mysql
APV opens up 2 additional ports at 6000 rpm. You usually see a dip at those point.

Are you MT or AT?
2007 Sport 6 speed MT
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Old 03-16-2008, 04:00 PM
  #1208  
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Java,

Thanks for sharing. Excuse me for asking, and my ignorance, but where is the other fiffy horsepower? I thought this unit was touted as 300? Perhaps the last 1000 RPM I guess.

Cheers,
C#
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Old 03-16-2008, 04:39 PM
  #1209  
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This post has nothing to do with the hp#. I just wanted to point out the obvious belt slippage. Not only is it consistently losing boost above 6k, the boost prior to that is inconsistent as well.
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Old 03-16-2008, 05:20 PM
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Originally Posted by morkusyambo
This post has nothing to do with the hp#. I just wanted to point out the obvious belt slippage. Not only is it consistently losing boost above 6k, the boost prior to that is inconsistent as well.
there is ~1 psi boost increase at 6,200 rpm, and that's the point where the hp/tq drop and afr's increase.

run #2 seems solid. No weird jumps at 4k rpm
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Old 03-16-2008, 05:51 PM
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Originally Posted by Hymee
Java,

Thanks for sharing. Excuse me for asking, and my ignorance, but where is the other fiffy horsepower? I thought this unit was touted as 300? Perhaps the last 1000 RPM I guess.

Cheers,
C#
is that a brown stain I see up your arm Hymee ?
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Old 03-16-2008, 06:02 PM
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Originally Posted by Hymee
Java,

Thanks for sharing. Excuse me for asking, and my ignorance, but where is the other fiffy horsepower? I thought this unit was touted as 300? Perhaps the last 1000 RPM I guess.

Cheers,
C#
I have stage 2, not the Stage 2 CS, my CAT is still the stock one.
The 307 HP was with a high-flow CAT.
Still 253 on a bad day, is not that bad.
Mazsport is shipping me a dual resonated cat-less mid-pipe soon.
Betsey; Mazsport...... Please soon.....
After I replace the exhaust I will trot on down and pay for a new dyno run.

Any thoughts on a meet with a dyno? (I can has group rate?)

Last edited by Rote8; 03-17-2008 at 03:54 PM.
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Old 03-16-2008, 06:31 PM
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Originally Posted by Java-fan
Any thoughts on a meet with a dyno? (I can has group rate?)
brotherz racing in tampa charges $30 a pull. Or you can go by the hour for around $100/hr. You can also try titan motorsports up in orlando, I think they had a dyno machine there, but don't know for sure.

If you need more places, go to maps.google.com, search for businesses, type in racing, and start calling the matches nearby.
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Old 03-17-2008, 03:57 PM
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Originally Posted by mysql
If you need more places, go to maps.google.com, search for businesses, type in racing, and start calling the matches nearby.
The DynoJet website has a list, that is where I found the last one:
DynoJet Dynos
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Old 03-18-2008, 08:49 PM
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One other thing with the Dyno....

I did NOT pull any fuses when I dyno'd the car.
I have since learned there is a fuse under the hood that MUST be pulled on the RX8 to get a correct reading.
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Old 03-18-2008, 08:50 PM
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I never pulled any fuses. Just disable traction control.
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Old 03-18-2008, 08:58 PM
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Yeah, pulling fuses isn't necessary.

What might be happening is you are reaching the end of the calcLoad range and the PCM is trying to do its torque-limit routine.
No way around that but a reflash, though.

I've never had the TSC/DSC/ABS interfere with a dyno run and I've pulled the fuses to see if anything improved, which it did not.
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Old 05-09-2008, 04:03 PM
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Latest HP

I now have the Racing beat cat-back, with the Mazsport dual resonated cat-less mid-pipe.
My car is too lean till I can get the thing tuned/flashed, but I am making 296 RWHP for now.
As far as the lean out, my solution is going to be LOT'S of Methanol for now. LOL
I will need to try some new injectors soon to get MO GAS going in.
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Old 05-09-2008, 04:42 PM
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dynojet?
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Old 05-09-2008, 05:47 PM
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what a/f's are you getting? Are you data collecting?
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Old 05-09-2008, 07:08 PM
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Originally Posted by MazdaManiac
Which dynomometer did you use?
www.realstreetperformance.com Model 224xLC
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Old 05-09-2008, 07:09 PM
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Originally Posted by olddragger
what a/f's are you getting? Are you data collecting?
olddragger
Will post a scan later.
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Old 06-10-2008, 01:09 PM
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HI !

Waiting for your scan...pettit products looks so impressive.

Last edited by JMKuco; 06-11-2008 at 07:30 AM.
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Old 06-10-2008, 08:19 PM
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^I'm confused
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Old 07-19-2008, 07:06 PM
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Originally Posted by JMKuco
HI !

Waiting for your scan...pettit products looks so impressive.
Sorry for the delay.
I will make data captures at the dyno meet on August 3rd in Kissimmee.
The dyno graph and the data capture should be nice.

I hope to have Snow Performance's Nitro-Booster by then as well.
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