Location: chrome feet down low an my saleen wet black
Posts: 467
power/slipping question
with my mods, i definately can tell a difference, 40hp upgrade, mac headers, bassani x pipe
now heres the question, its gotten colder here ,soon i will be puttin the car away for winter storage, its not an everyday driver , just sundays for the most part, i donot race it or beat on it, but sometimes like to get on it
has anyone else had like a slipping feeling, kinda like by 3rd gear if im on the throttle i get a slipping feeling, supercharger belt? clutch? any suggestions?
if I let off the throttle an rethrottle it goes away, i dont hear nothing whine or such, i have about 1600 miles on the car now
i mean id hate to have to replace the clutch already, but if thats the case is there a heavy duty one to replace it with? if its supercharger belt slippage? whats the fix?
also wanted to note. it only does it once in awhile not everytime. for instance, if the car sits all week i get in it. take off ,it will do it, but after its heated up fully it wont do it
thanks
__________________
06 black SC 281 coupe #538
pioneer avic z3 nav/sirrus,bluetooth,ipod,backupcam,
40hp upgrade ,mac headers,bassani xpipe w/cats
JDM tune/3.2 pulley/JDM airbox/98maf/gt pump/tb
Racing Quarter windows
16 others of various breeds
Sponsored Links
This ad is not displayed to registered members. Register your free account today and become a member on Mustang Forums!
I have the Saleen supercharger in my car and I'm experiencing the same thing. I've heard a whole host of possible things this could be..........but it honestly feels like slippage. And I'm running the stock Saleen boost (4psi). Its not your clutch. And like you, I don't beat on my car hardly at all..........just a few fun stabs at the loud pedal here and there. I do find alot of times that once I get on it a few times the apparent slippage tends to become more limited....but it does aggrivate me from time to time. I was considering doing an 8 rib pulley kit to my car to fix this problem....but the guy who does these kits doesn't offer a blower pulley less than 10psi. And I've heard alot of ppl are having issues with broken tensioners from running 10psi or higher on these 8 rib kits. Of course, most of those guys race their cars on the track regularly, so I'm not sure if guys like us would have to worry about this problem.
I am keepin an eye out on this issue, and I'll let you know if I find out anything.
Keep us posted on this. Hopefully it does not become to serious.
You don't happen to know if Saleen puts its own custom tensioner on the E cars do you? Or do they still use the stock Ford tensioner? I'm just curious if Saleen has addressed this issue for its E cars.....doesn't seem like they'd overlook a potentially disastrous problem such as this. Then again, as I said, alot of the guys having tensioner issues like to beat the hell outta their cars...on the street and the track. And not everyone that is running these 8 rib or high boost setups on their Saleen s/c'd cars are having these issues. So I'm starting to think that reasonable street drivers like myself may not have to worry about this.
Either way, if I can get away with it safely, I will be putting an 8 rib kit on my car. I'm tired of downshifting into 3rd and punching it only to have the car "wind up" before the boost builds back up. At times I almost feel like I'm driving a car with an oversized turbo.[&:]
I wonder if you got some grease, lubricant, coolant, on the belt? Have you inspected it to make sure it is dry and grease free?
Oh yea.....definitely. I spent nearly 2 hours under the hood the first time the slippage happened. The belt looks clean, as do all the pulleys. Weird thing is that my car didn't start doing this until after I had it dynoed. Of course, I didn't really wring it out before the dyno either, because I wanted to make sure the A/F and tune checked out before I got too much into the boost. So maybe thats why I didn't notice it until after.
I've heard of Saleen s/c'd guys having this problem........but it seems sporadic. Not everyone seems to have it. But as 06SaleenX pointed out, once the car and belt are warmed up properly, it doesn't seem as noticable. There are some ppl that are suspecting that the tensioners may be the culprit.....and that the ones that are breaking at higher boost levels are an indication of this. But that's all just speculation at this point.
For the most part it's really not enough boost to encounter slippage. Interesting though. I will find out if the E cars runa different tensioner but I doubt it. Are you running the completely stock Saleen canned 435 tune with no other mods? And if so, can you post your dyno sheet? Interested on Saleen's canned Powerflash numbers on the stock 435 tune.
For the most part it's really not enough boost to encounter slippage. Interesting though. I will find out if the E cars runa different tensioner but I doubt it. Are you running the completely stock Saleen canned 435 tune with no other mods? And if so, can you post your dyno sheet? Interested on Saleen's canned Powerflash numbers on the stock 435 tune.
No, I never ran the Saleen tune on my car. I run an SCT2 tune from JDM Engineering with some other supporting mods (CAI, 90mm MAF, 39 lb injectors, HTO plugs). I'll put up my dyno sheet below.
I kind of agree about it not being enough boost to be seeing slippage....and even my installer said the same. But I"ve investigated every other possible cause and just haven't found anything wrong. I've also checked with other Saleen s/c'd guys running the same tune and most of them haven't had any issues either. But.........most all of them are not running stock boost. And I wouldn't suspect the JDM tune anyways, considering that a few stocker S281SC guys have reported the same problem as me.
Either way, I'm gonna stay at 4 psi on the 6 rib setup for now. The slippage only seems to come on in certain situations...and I'm learning how to drive around those situations to avoid it. When I'm done with all the suspension and drivetrain mods that I want to do, I'll go to an 8 rib setup and pulley down to 10 psi. Slippage should be a thing of the past then. I just hope a tensioner issue doesn't replace it as my next hassle.[&o]
How could slippage be either the SC belt or a clutch. These are two entirely unrelated things
If the Belt starts slipping you'll get a reduction in Boost & Power and possibly RPM dependant on scenario. If it's a slipping clutch you'll get RPM surge.
Two completely different symptoms for two completely different issues.
Is the boost dropping off considerably during the slippage? Yes? - S/C belt
Are the revs surging? - Yes? - Clutch
Boost will drop slightly if wheels break traction as the motor load reduces, but not significantly.
Checking for clutch slippage is easy. Get the motor up to 2500rpm in 3rd gear, hit the gas and at the same time just feather the clutch to initiate a slip, then immediately release the clutch pedal. The clutch should regain control of the motor. Don't let the motor get too much RPM before dropping the clutch though, with 450hp+ even a good clutch might not be able to grab in a tall gear.
__________________ www.mkeeler.com/mustang/
Minority group member - Got three pedals and I like going round corners
power/slipping question
I do find alot of times that once I get on it a few times the apparent slippage tends to become more limited....but it does aggrivate me from time to time. I was considering doing an 8 rib pulley kit to my car to fix this problem....but the guy who does these kits doesn't offer a blower pulley less than 10psi. And I've heard alot of ppl are having issues with broken tensioners from running 10psi or higher on these 8 rib kits. Of course, most of those guys race their cars on the track regularly, so I'm not sure if guys like us would have to worry about this problem. 
