Pettit Super Charger Owners
03-24-2013, 01:15 PM
I rest the ecu again. seems to be holding idle now and no white smoke. WEIRDNESS i tell u.
BTW does anyone have EFIdude software. I would like to email the files to someone if they would be welling to take a look at them for me. Short file of 1st, 2nd, and 3rd gear pulls. I'm looking at the logs and I'm seein AFR spikes of 20.26 when I'm coming of the gas and slowing down.
BTW does anyone have EFIdude software. I would like to email the files to someone if they would be welling to take a look at them for me. Short file of 1st, 2nd, and 3rd gear pulls. I'm looking at the logs and I'm seein AFR spikes of 20.26 when I'm coming of the gas and slowing down.
Last edited by NYC Drift King; 03-26-2013 at 08:39 PM.
03-24-2013, 03:12 PM
Counter intuitive I know..... but a post compressor vacuum leak will often cause air to escape post MAF due to intake timing and compressor airflow at low RPM idle. It will manifest itself as a high negative fuel trim at idle. If idle g/sec is close to 5, injector bank 1 hasn't been messed with and fuel trims are negative, check for vacuum / boost leaks.
03-24-2013, 04:07 PM
Not so much counter-intuitive as it is terminology. Post-compressor is a boost leak and pre-compressor is a vacuum leak is all. It's a matter of air entering or escaping as you mentioned.
03-24-2013, 04:54 PM
Valid point. Most people think of a boost leak as something that happens in boost only, and therefore lowers power. So I've gotten used to describing vacuum leaks as occurring when the motor is in vacuum.
03-24-2013, 04:59 PM
Well there must not be a vacuum if air is escaping outward unless they have an intake manifold that is capable of defying the laws of basic physics 
03-24-2013, 05:18 PM
Kane I am trying to wrap my head around what you are saying.....
At idle , of course , I am not "in boost" and I show 20 inches of vacuum. 7-8 grams per sec at 1.2K idle.
If I had a leak post compressor wouldnt that allow air to enter rather than escape? After all the engine is in vacuum??
Now if I have a leak within the bypass valve/supercharger itself--i can kinda see what you are saying--but otherwise--wouldnt it still be a vacuum leak?
Head hurts--need diet coke quickly....
At idle , of course , I am not "in boost" and I show 20 inches of vacuum. 7-8 grams per sec at 1.2K idle.
If I had a leak post compressor wouldnt that allow air to enter rather than escape? After all the engine is in vacuum??
Now if I have a leak within the bypass valve/supercharger itself--i can kinda see what you are saying--but otherwise--wouldnt it still be a vacuum leak?
Head hurts--need diet coke quickly....
03-26-2013, 06:39 PM
It depends where the leak is, that's the short answer.
Don't assume a high negative fuel trim cannot mean a vacuum leak, it can. If your airflow numbers are normal, injectors are good (and no adjustments made to them in the Cobb), then check for a vacuum leak.
Don't assume a high negative fuel trim cannot mean a vacuum leak, it can. If your airflow numbers are normal, injectors are good (and no adjustments made to them in the Cobb), then check for a vacuum leak.
04-02-2013, 07:43 AM
WHiV6
SCHEDULE OF EVENTS
FRIDAY MAY 17TH
MEET & GREET
Where: Circus Circus parking area behind The Adventure-dome theme park.
When: 3pm to 8pm
Greeting, registration and begin vehicle staging for car show.
PARTY AT THE CIRCUS CIRCUS
Where: Circus Circus Hospitality Suite
When: 8pm to whenever
Party will be BYOB with horderves, chips and dips supplied by WHiV6.
SATURDAY MAY 18th
ROTARY SHOW
Check-in begins at 7am
Show 8am to 1pm
This year the rotary show will be held in the parking area behind The Circus Circus Adventure-dome. There will be several categories depending upon the cars registered prior to the event. Repus, old school, 7’s, and 8’s will be judged separately. 7s may be broken up into first, second and third gen vehicles if preregistration shows a sufficient number. All rotary vehicles registered in the show will be eligible for trophies.
TROPHIES, RAFFLE, AND FOOD
Raffle tickets will be sold at the meet and greet on Friday and during the car show on Saturday. Drawing for raffle prizes, announcement of car show winners and presentation of trophies will be done at conclusion of car show.
For attendees convenience there will be food vendors available during the show as there will not be a lunch as in past years.
ANNUAL CRUISE
2PM
Be prepared for an approx. 3hr drive
Valley of Fire
(Tentative)
(there will be maps and SCR will pre-run the route)
At Hotel Party
In past years we have the Saturday night dinner get together at a local restraunt. This year we will have the party outside the adventure dome in a secure area. There will be a DJ or live band and plenty of seating.
When: 8pm to ????
This will BYoB
Other Elements to be confirmed
SUNDAY MAY 19th
SCENIC CRUISE
We will have a short cruise to a scenic area to be announced
Willow Beach
(Tentative)
AFTER CRUISE BBQ
At an area to be announced. Food and soda provided by a sponsor
burgers, hot dogs, chips, cold drinks
End of WHiV6...Hope you all had a good time
Attendie lists and other information will appear in this forum
Follow the link below for rates and reservations
https://resweb.passkey.com/Resweb.do...oupID=19224140
__________________
04-02-2013, 09:28 AM
Dongbag extrordinare
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So, I installed the Coils, wires, and plugs. I gapped the plugs to .030 as recommended by Pettit. I know they recommend that gap for Forced inducted 8's. I figure I would get it out of the way. this way I could log the car with the EFIdude and send Pettit the files with the new ignition compontents.
My problem: the car when warm dies at red lights, is not holding idle. Theirs a bit of white smoke and its back fireing alot.
When I screwed the plugs in I did till they were snug and I heard the crush washer. Wires are all snug and tight to their connectors. Coils are nice and snug too. I marked all the plugs and wires t1, l1, t2, l2 when I did the install. I'm lost....
My problem: the car when warm dies at red lights, is not holding idle. Theirs a bit of white smoke and its back fireing alot.
When I screwed the plugs in I did till they were snug and I heard the crush washer. Wires are all snug and tight to their connectors. Coils are nice and snug too. I marked all the plugs and wires t1, l1, t2, l2 when I did the install. I'm lost....
This was circa 2006/7 so no flaming please. I realize we have come a long way since then.
04-02-2013, 10:08 AM
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Its ALIVE!!
Figured out what was wrong with the car. Now i'm planning on sending it to Pettit for a low compression motor.
The car has been sitting for allmost three years. I put some octane boost and lucas injector cleaner in with a fresh tank. I have been driving it around the neighborhood with no issues.
It is doing this with the front O2 sensor disconnected while I wait for the new one from Mazmart. I have been informed that at worst it will just run the car very rich.
I am thinking about getting the combo waterpump/thermostat from Mazmart. Any thoughts on this? I put @50k boosted miles on the car with the stock system and never had any trouble. That includes hot, humid summers in AL, FL, and NC.
I have an AEM water/meth injector lying around that i'm thinking about having Cam put on while he has the car. What is the price on methonal these days? I have a couple of 10gal drums. Anyone know how long that will last?
What is the consensus on motor/tranny/blower oil these days?
Got a BMW 328 as the daily driver now. Its amazing how soft and sterile the 8 can make that car feel just tooting around the neighborhood
Figured out what was wrong with the car. Now i'm planning on sending it to Pettit for a low compression motor.
The car has been sitting for allmost three years. I put some octane boost and lucas injector cleaner in with a fresh tank. I have been driving it around the neighborhood with no issues.
It is doing this with the front O2 sensor disconnected while I wait for the new one from Mazmart. I have been informed that at worst it will just run the car very rich.
I am thinking about getting the combo waterpump/thermostat from Mazmart. Any thoughts on this? I put @50k boosted miles on the car with the stock system and never had any trouble. That includes hot, humid summers in AL, FL, and NC.
I have an AEM water/meth injector lying around that i'm thinking about having Cam put on while he has the car. What is the price on methonal these days? I have a couple of 10gal drums. Anyone know how long that will last?
What is the consensus on motor/tranny/blower oil these days?
Got a BMW 328 as the daily driver now. Its amazing how soft and sterile the 8 can make that car feel just tooting around the neighborhood
04-03-2013, 04:03 AM
Londons Yellow Peril
Hey as a bit of further positive feedback, we just did an airfield day in the UK (pics on the Pettit facebook page )
and on the short sprint course a Pettit charged RX8 crushed everyone completely, with the only sub 50 second time of the day. In fact Scott got a 48 second time which is really good. I have done the course many times and 50-55 is very good, with most getting between 55-65. I have only ever seen 2 or 3 other cars do under 50 seconds, and they have to be awesome and well driven. Considering on this day there was a bunch of TVRs and a couple of BMW M cars plus 2 Noble M12s there was some serious metal there that day too!
and on the short sprint course a Pettit charged RX8 crushed everyone completely, with the only sub 50 second time of the day. In fact Scott got a 48 second time which is really good. I have done the course many times and 50-55 is very good, with most getting between 55-65. I have only ever seen 2 or 3 other cars do under 50 seconds, and they have to be awesome and well driven. Considering on this day there was a bunch of TVRs and a couple of BMW M cars plus 2 Noble M12s there was some serious metal there that day too!
04-03-2013, 08:59 AM
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Hey as a bit of further positive feedback, we just did an airfield day in the UK (pics on the Pettit facebook page )
and on the short sprint course a Pettit charged RX8 crushed everyone completely, with the only sub 50 second time of the day. In fact Scott got a 48 second time which is really good. I have done the course many times and 50-55 is very good, with most getting between 55-65. I have only ever seen 2 or 3 other cars do under 50 seconds, and they have to be awesome and well driven. Considering on this day there was a bunch of TVRs and a couple of BMW M cars plus 2 Noble M12s there was some serious metal there that day too!
and on the short sprint course a Pettit charged RX8 crushed everyone completely, with the only sub 50 second time of the day. In fact Scott got a 48 second time which is really good. I have done the course many times and 50-55 is very good, with most getting between 55-65. I have only ever seen 2 or 3 other cars do under 50 seconds, and they have to be awesome and well driven. Considering on this day there was a bunch of TVRs and a couple of BMW M cars plus 2 Noble M12s there was some serious metal there that day too!
04-03-2013, 09:00 AM
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Did Pettit ever start making a wider pulley/belt combo, and/or a cogged setup?
I have been talking Cam's ear off and I don't want to call him again with just the one question
I have been talking Cam's ear off and I don't want to call him again with just the one question
04-04-2013, 07:28 PM
The Chief
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How's everyone doin'? Was researching the best methods to paint and stencil my Brembo's and it brought me back here? Thought I stop in and see what's going on. Denny, I can't believe you're still "tinkering." I figured that you'd have it perfected by now!
04-05-2013, 06:36 AM
your old car is still running like a champ and beautiful as ever
she's become a bit of a track ***** now though
04-05-2013, 06:58 PM
Hey Man,!!
Yep--still here--learned a lot. Car is tight and faster than it ever was.
BUT, been thinking a lot about a c6 ZO6 lately.................
How is all that power you are playing with?
Yep--still here--learned a lot. Car is tight and faster than it ever was.
BUT, been thinking a lot about a c6 ZO6 lately.................
How is all that power you are playing with?
04-06-2013, 09:05 AM
anyone know right off hand which way the aluminum spacer goes in the back of the SC pulley?
one side is ever so slightly thiner/rounded than the other side
one side is ever so slightly thiner/rounded than the other side