Pettit Super Charger Owners
A couple of points (before people get their panties in a wad):
The cause of the bad idle is not totally clear to me, but it appears to be a combination of "chopping" from the blower, odd spring tension on the BPV, bad MAF housing design and load.
That said, at 1100 RPM, it is quite nice.
I don't know that I hate it. lol.
Honestly, the twin-screw makes some really musical noises and the power delivery is more than satisfactory.
From the beginning, my assault on the Pettit is not because it is an SC but because the engineering of the kit was so lax.
Fortunately, the issues are being met one by one and it will ultimately be an excellent system.
Its just too bad that the owners need to bear the brunt of this re-engineering effort.
The cause of the bad idle is not totally clear to me, but it appears to be a combination of "chopping" from the blower, odd spring tension on the BPV, bad MAF housing design and load.
That said, at 1100 RPM, it is quite nice.
I don't know that I hate it. lol.
Honestly, the twin-screw makes some really musical noises and the power delivery is more than satisfactory.
From the beginning, my assault on the Pettit is not because it is an SC but because the engineering of the kit was so lax.
Fortunately, the issues are being met one by one and it will ultimately be an excellent system.
Its just too bad that the owners need to bear the brunt of this re-engineering effort.
Yeah, **** me, what a piece of **** this Pettit kit is, especially after that Moon guy came and gave me that crappy install - I should have listened to all the advice I got here. I've been pissed about the idle since day one. I'm actually thinking about an IntX and Greddy, or maybe something reliable like a Turbinator. Anything to get me away from the driveablility and 20 mpg, ANYTHING. Dear God, save me from my supercharger!
.....
Not.
Last edited by zenrx8; Mar 12, 2008 at 08:09 PM.
J/K Phil
It's on the mazdausa website now too:
http://www.mazdausa.com/MusaWeb/disp...SweepstakesRX8
and the mazdaespanol site:
http://www.mazdaespanol.com/mazdausa...=tuningShows52
BTW Moon, we'll be down there on the 28th, we'll buy the Pizza this time.
Last edited by Bastage; Mar 12, 2008 at 08:46 PM.
Thread Starter
FI by Pettit-BHR-Cobb AP
iTrader: (3)
Joined: Aug 2004
Posts: 3,026
Likes: 2
From: Sin City, Nevada
I sent them an email a month or two ago asking the question, and they have not responded. I'm guessing their using the car as a promotional tool all over the country... too bad it's an auto
J/K Phil
It's on the mazdausa website now too:
http://www.mazdausa.com/MusaWeb/disp...SweepstakesRX8
BTW Moon, we'll be down there on the 28th, we'll buy the Pizza this time.
J/K Phil
It's on the mazdausa website now too:
http://www.mazdausa.com/MusaWeb/disp...SweepstakesRX8
BTW Moon, we'll be down there on the 28th, we'll buy the Pizza this time.
Registered
Joined: Jan 2006
Posts: 1,257
Likes: 0
From: Maryland
I got inspired and started playing with the Electronic Throttle Control stuff a bit. I had the idle down to 950 and the ETC caught the rapid throttle off about 85% of the time after a hard pull but it would still stall from time to time.
I know, I know…. That is not good enough and I agree but it was a lot better. You can also let the clutch out now without touching the gas and it will drive away (like a proper ETC car should).
I'll keep at it when I find spare time and maybe I will get lucky.
I know, I know…. That is not good enough and I agree but it was a lot better. You can also let the clutch out now without touching the gas and it will drive away (like a proper ETC car should).
I'll keep at it when I find spare time and maybe I will get lucky.
Registered
Joined: Jan 2006
Posts: 1,257
Likes: 0
From: Maryland
I sent them an email a month or two ago asking the question, and they have not responded. I'm guessing their using the car as a promotional tool all over the country... too bad it's an auto
J/K Phil
It's on the mazdausa website now too:
http://www.mazdausa.com/MusaWeb/disp...SweepstakesRX8
and the mazdaespanol site:
http://www.mazdaespanol.com/mazdausa...=tuningShows52
BTW Moon, we'll be down there on the 28th, we'll buy the Pizza this time.
J/K Phil
It's on the mazdausa website now too:
http://www.mazdausa.com/MusaWeb/disp...SweepstakesRX8
and the mazdaespanol site:
http://www.mazdaespanol.com/mazdausa...=tuningShows52
BTW Moon, we'll be down there on the 28th, we'll buy the Pizza this time.
What an auto hating Bastage you are, dam you to hell.
And just in case you haven't read well 'tween the lines, Moon ******* rocks.
Last edited by zenrx8; Mar 13, 2008 at 08:23 PM.
Cheers,
Hymee.
Pettit fangurl <3
Joined: Mar 2005
Posts: 5,386
Likes: 0
From: Aston, PA
wanted to check the AFRs and the timing...for starters
i did a couple of runs today....got 2 good pulls in ..just over 8k....traffic was a little tight...
the software is really cool...does lots of neat stuff .....
on the first pull...2nd at 8066 the AFR was 11.51
on the second pull...2nd a 8002 the AFR was 12.49
these #s are coming from the first pettit flash
i did a couple of runs today....got 2 good pulls in ..just over 8k....traffic was a little tight...
the software is really cool...does lots of neat stuff .....
on the first pull...2nd at 8066 the AFR was 11.51
on the second pull...2nd a 8002 the AFR was 12.49
these #s are coming from the first pettit flash
Kind of lean - did you hold the RPM or were you at WOT gunning it.
Did the AFR come off your Cobalt or the stock Wideband?
Both have latency; so a quick run might screw with the info.
Did the AFR come off your Cobalt or the stock Wideband?
Both have latency; so a quick run might screw with the info.
Pettit fangurl <3
Joined: Mar 2005
Posts: 5,386
Likes: 0
From: Aston, PA
readings came from the efi dude data logger...
plugged it into the opd port...
i cant really get an accurate read on the cobalt while im driving...there's too much change...and i'd rather keep my eyes on the road...
basically it was a pull in 2nd from a stop sign to the next...i ran out of room to take it further...
these were my first runs with the DUDE...next run, i will spend some time on the highway etc...to get a better over all pic
plugged it into the opd port...
i cant really get an accurate read on the cobalt while im driving...there's too much change...and i'd rather keep my eyes on the road...
basically it was a pull in 2nd from a stop sign to the next...i ran out of room to take it further...
these were my first runs with the DUDE...next run, i will spend some time on the highway etc...to get a better over all pic
Yeah, try to load it up and hold it for a second or two - the tail end of that will be more accurate.
If it is still reading high 12's at 8000 RPM, then you might want to address it...
If it is still reading high 12's at 8000 RPM, then you might want to address it...
There are options to send the AFR info to an external logger.
http://www.autometer.com/download_instruction/1143A.pdf
http://www.autometer.com/download_instruction/1143A.pdf
Registered
Joined: Jul 2005
Posts: 153
Likes: 0
From: Mount Holly, NJ
More Installation questions
We are alomst done and as usually with each step I have a few more questions.
1) The picture below shows a wire clip that I can't seem to find what it attaches to. Can someone please point me in the right direction.
2) How long does it take for I/C pump to start cycling coolant? It doesn't seem to be doing anything, When we first hooked it up it wasn't even pumping just overheating. Then after disassembling it we got it to start to pump. But it isn't cycling the coolant back around.
3) What are good AFR's going to be when running?
1) The picture below shows a wire clip that I can't seem to find what it attaches to. Can someone please point me in the right direction.
2) How long does it take for I/C pump to start cycling coolant? It doesn't seem to be doing anything, When we first hooked it up it wasn't even pumping just overheating. Then after disassembling it we got it to start to pump. But it isn't cycling the coolant back around.
3) What are good AFR's going to be when running?
Registered
Joined: Jul 2005
Posts: 153
Likes: 0
From: Mount Holly, NJ
Registered
Joined: Jul 2005
Posts: 153
Likes: 0
From: Mount Holly, NJ
Yeah that is what happens when it has been 20 straight hours in the garage and your fried.
Thought that might be the case with the pump. Figred I would check first.
Will check the A/C it is right next to it so makes sense.
I do have one more question regarding the VDI connection from the Vacuum box. When I spoke to CAM last week he said to pull the hose that connects between the Vacuum box and the VDI. I just wanted to make sure which one he was talking about and find out what VDI stands for.
Thought that might be the case with the pump. Figred I would check first.
Will check the A/C it is right next to it so makes sense.
I do have one more question regarding the VDI connection from the Vacuum box. When I spoke to CAM last week he said to pull the hose that connects between the Vacuum box and the VDI. I just wanted to make sure which one he was talking about and find out what VDI stands for.
Last edited by Dogpound48; Mar 16, 2008 at 10:06 AM.