Pettit Super Charger Owners
03-12-2008, 05:33 AM
#1451
I'm not sure if the vehicle that I just worked with had a screen or not.
Since the idle is so high on the Pettit application, the accuracy of the low-end flow isn't as important.
I'd suggest it, but getting the MAF tube out to a proper length is going to be more important.
Since the idle is so high on the Pettit application, the accuracy of the low-end flow isn't as important.
I'd suggest it, but getting the MAF tube out to a proper length is going to be more important.
03-12-2008, 10:57 AM
#1453
I must be lucky. My idle has always been stable and "rock solid" at 1100 rpm after the SC install, everytime, even after I reset the PCM (pull the room fuse). And I'm running a screen.
03-12-2008, 12:27 PM
#1455
As the S/C places more load on the engine, as does an A/C compressor or alternator, the speed of idle need not change. The trick is to automatically get more thottle opening to conteract the load, but not exceed it, so the target RPM remains the same.
Cheers,
Hymee.
Cheers,
Hymee.
03-12-2008, 12:40 PM
#1457
I assume what your getting at is the concept of "reversion" (i.e. the S/C creating pulses back up the MAF tube), which needs more study I guess, rather than postulation.
That said, the engine still has a net postive flow of air that is all being measured by the MAF...
Cheers,
Hymee.
03-12-2008, 12:55 PM
#1460
Dongbag extrordinare
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I'm not sure if the vehicle that I just worked with had a screen or not.
Since the idle is so high on the Pettit application, the accuracy of the low-end flow isn't as important.
I'd suggest it, but getting the MAF tube out to a proper length is going to be more important.
Since the idle is so high on the Pettit application, the accuracy of the low-end flow isn't as important.
I'd suggest it, but getting the MAF tube out to a proper length is going to be more important.
03-12-2008, 01:07 PM
#1461
Yeah, it has to be kept up to 1100 because of the way the kit is designed.
If it had been done right, there wouldn't be a load at idle.
I can set the idle anywhere I want, but it seeks pretty heavily at anything under 1k.
The BPV flutters, too, which makes it even more difficult.
A clutch (like the OEMs) would have fixed this.
If it had been done right, there wouldn't be a load at idle.
I can set the idle anywhere I want, but it seeks pretty heavily at anything under 1k.
The BPV flutters, too, which makes it even more difficult.
A clutch (like the OEMs) would have fixed this.
Last edited by MazdaManiac; 03-12-2008 at 01:10 PM.
03-12-2008, 01:40 PM
#1462
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.
03-12-2008, 01:47 PM
#1463
Northeast Pimpin'
Join Date: Aug 2005
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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.
03-12-2008, 01:50 PM
#1464
first run? greddy never fixed anything of substance even today. That's why we replace the fuel management, and better yet, replace the turbo. Then it's a damn fine kit.
03-12-2008, 02:03 PM
#1467
Think stupid idea to place a city...
Think nature...
Even after centuries and countless lives lost...humans still have not learned...
Stupidity trumps politics every time...
Carry on...
03-12-2008, 02:07 PM
#1468
I'm not sure if the vehicle that I just worked with had a screen or not.
Since the idle is so high on the Pettit application, the accuracy of the low-end flow isn't as important.
I'd suggest it, but getting the MAF tube out to a proper length is going to be more important.
Since the idle is so high on the Pettit application, the accuracy of the low-end flow isn't as important.
I'd suggest it, but getting the MAF tube out to a proper length is going to be more important.
WTF, can someone please get him back on track. Bastage, Shinka, OD, anyone...pleaseeeee. 
03-12-2008, 05:08 PM
#1472
03-12-2008, 06:42 PM
#1475
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.