Dyno tune issues
#1
Safety Car
Thread Starter
Dyno tune issues
So my car is in the hands of dr pill right now.. But we are having issues with belt slippage still. Started with a 3.33 pulley and a green belt, which slipped really bad.. I am on a 3.6 pulley and a standard black v belt. and still starting to slip at 6k. I cant really afford a flip drive right now. is there any other options i can do ? Phil wants me to try and find a 3.47 pulley with teeth to help grab. like the A&A ones but they are 3.25 inch
#2
Team Owner
No reason a 3.6 should slip that bad. Looks like it maybe too long and lose tension. I would see if you can fit a smaller belt on.
#3
Safety Car
Thread Starter
That belt is insane tight.. is it possible i have a boost leak? Id think if i had a leak wouldnt it show before 5600rpm where its falling off.
#5
something else going on here imo. My car used to slip a normal 8 rib at 760whp a bit until I tore it all apart and laser aligned everything with properly calibrated laser tool. Now made 900whp with no flip drive on 8 rib gates belt. if your pulleys are not aligned properly and you bandait it with a notched pulley like that you will nuke your belts.
that wavy boost line looks like belt slip and not boost leak to me.
that wavy boost line looks like belt slip and not boost leak to me.
#6
Safety Car
Thread Starter
something else going on here imo. My car used to slip a normal 8 rib at 760whp a bit until I tore it all apart and laser aligned everything with properly calibrated laser tool. Now made 900whp with no flip drive on 8 rib gates belt. if your pulleys are not aligned properly and you bandait it with a notched pulley like that you will nuke your belts.
that wavy boost line looks like belt slip and not boost leak to me.
that wavy boost line looks like belt slip and not boost leak to me.
#7
I runa 3.47/8.0" (10% OD) setup with an A&A bracket, no flip drive, no slip.
922 belt works but I have been using a Band belt lately with good results that is in between a 922 and 915 gates.
922 belt works but I have been using a Band belt lately with good results that is in between a 922 and 915 gates.
#8
Safety Car
Thread Starter
neverstop u mentioned not being alligned right. last year had no problems on A&A bracket i am on ecs now.. maybe laser it
#9
#10
Safety Car
Thread Starter
u still got a link ill check it out.. worst case i can swap belts til i get a good one lol - ima grab a 3.47 pulley anyways
Last edited by UmX; 03-10-2017 at 01:56 PM.
#11
They usually are. The newest A&A bracket design is the best IMO but you should still be able to run a 3.47/8" combo on an 8 rib with no slip if the tensioners are working properly and the belt is aligned.
#13
Team Owner
Yes, but that is not needed for you setup. You have a different problem. Throwing special pulleys, etc doesn't fix your issue. It may mask it, but either way you have an issue that should be fixed.
There is a bunch of different coating/processes now. CPR has grip-tec pullies like that. They work good, but no reason it should be needed on a 3.5"+ pulley.
There is a bunch of different coating/processes now. CPR has grip-tec pullies like that. They work good, but no reason it should be needed on a 3.5"+ pulley.
#14
Team Owner
Get under the car and see how much room it has. Put a wrench on it and open it up. If it is very close to the crank pulley that is the problem. You are running out of autotensioner.
#15
I use the Griptech pulleys a lot on PD blower applications run 2.5" or smaller but never needed one for a centri.
#16
Safety Car
Laser align that badboy. I run a 8.190/3.85 combo with my D1 and new A&A bracket setup without a flip drive and have zero slip.
#17
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Not sure if this is our kit or not, but if it is you do not need any special coasted pulleys or a direct drive for the power you're making. Make sure the tensioner is fully opened.
#18
Safety Car
Thread Starter
fully open would be towards passenger side right? and if it is to close to the crank does that mean too small of a belt?
Last edited by UmX; 03-10-2017 at 03:49 PM.
#19
Team Owner
Means too long of a belt. Should be all the way to the passenger side.
#20
Safety Car
Thread Starter