Torque dip .. suggestions?
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Intermediate
Joined: Jan 2020
Posts: 47
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From: Indiana
We did not put a clutch in it he just added plates.. the only time I feel this dip is in high speeds . 5th gear mainly.. could this be the clutch slipping? Should get the afr and timing reports from Dyno run in the next couple days.. thanks everyone for your input.. much appreciated..
HDF Community Team
Joined: Jun 2006
Posts: 12,776
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From: san antonio
I agree with marcodarq, clutch slippage could be an issue. Looking at the squiggly lines as power increases and the fall off between 3500-4500 where power peaks makes it an issue to be looked, particularly if the clutch is OEM. I have see OEM clutch slippage in 95"/98" motors with much less power.
Thread Starter
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Intermediate
Joined: Jan 2020
Posts: 47
Likes: 0
From: Indiana
I agree with marcodarq, clutch slippage could be an issue. Looking at the squiggly lines as power increases and the fall off between 3500-4500 where power peaks makes it an issue to be looked, particularly if the clutch is OEM. I have see OEM clutch slippage in 95"/98" motors with much less power.
Grand HDF Member
Joined: May 2014
Posts: 3,843
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From: florida
not so much a clutch plate issue as a clutch spring issue. if the spring cant hold it together at the torque peak, thats all there is too it. that is why i wanted to see the afr at the point where the dip is. if afr and timing are good it's not tune but something else mechanical. such as clutch belt skip traction loss on drum etc.
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Thread Starter
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Intermediate
Joined: Jan 2020
Posts: 47
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From: Indiana
yes only when I go wot will I really feel the difference.. it just didn't seem to pull even close in that rpm range
Thread Starter
|
Intermediate
Joined: Jan 2020
Posts: 47
Likes: 0
From: Indiana
not so much a clutch plate issue as a clutch spring issue. if the spring cant hold it together at the torque peak, thats all there is too it. that is why i wanted to see the afr at the point where the dip is. if afr and timing are good it's not tune but something else mechanical. such as clutch belt skip traction loss on drum etc.
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