Has anyone had trouble with the 2.80 slipping???????if so did you fix it or does anyone have a solution to the problem. Hate to reorder and go with the the lower pullie set.:bash:
2.80 pulley slip
- Thread starter chillfactor
- Start date
Concensus is a bigger pulley like a 3.1" upper or lower pulley.
How much travel does your tensioner have? And where in it's range does it sit?
So are you saying that most are switching back to the 2.93, and are still making the same boost as with the 2.80????
TruBlu03
New Member
How can you tell if your belt is slipping, can you feel it when driving or black(belt) residue on the engine?
Was just curious.
Was just curious.
When you change your boost gauge or when you hook up an external during your Dyno, you would be able to see the diffrence.
i couldn't tell until i installed an aftermarket boost gauge.
afterwards, i removed my pulley guard -- black soot caked on the inside! :gt:
i'm sure i'm loosing a bit of high-end power.
I swapped pulleys in the middle of my dyno tune/chip burn, between a 2.93 and 2.80. With no other changes than the pulley swap, that did two things:
1. Added 3hp and 8 ft/lbs peak.
2. Shifted the entire power curve to the left by about 300 rpm.
Between 2500 and 5200 I gained an even 15hp straight across and 10-20 tq, but by 5500 rpm it was dead even between the two pulleys up to about 5900 when the 2.80 power curve started dropping off slightly faster than the 2.93, especially form 6200-6500.
My TR6's are gapped at .043; i'll probably tighten that down to .038 or so before the track this weekend and see if it helps, but i'll probably drop back to the 2.93 or maybe even pick up a 3.10 DUB pulley from Terry.
1. Added 3hp and 8 ft/lbs peak.
2. Shifted the entire power curve to the left by about 300 rpm.
Between 2500 and 5200 I gained an even 15hp straight across and 10-20 tq, but by 5500 rpm it was dead even between the two pulleys up to about 5900 when the 2.80 power curve started dropping off slightly faster than the 2.93, especially form 6200-6500.
My TR6's are gapped at .043; i'll probably tighten that down to .038 or so before the track this weekend and see if it helps, but i'll probably drop back to the 2.93 or maybe even pick up a 3.10 DUB pulley from Terry.
So do you think it was because the belt was slipping or that is how the 2.8 works against the 2.9???????
Yes, was it the belt, or the inefficiency of the blower spinning at those speeds? Maybe an intake temp comparison would help determine that.
I think it was both- primarily the belt slipping. I've noticed that winding it past about 5500 or so and I'll get a burning smell. Smells like burning rubber. Couldn't figure out what it was for the longest time; I though something was frying from overspinning the blower, then i remembered this post and it hit me- It must be the belt. I'm hitting the track this w/e; then the 2.93" pulley goes back on!
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