Restoring Torque
18 February 2002, 08:36 PM
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Fitted a Jetex 3" system to a UK MY96, gained a nice burble but lost some low end torque. Does anyone have any suggestions on restoring (and possibly improving) the torque.
Martin
Martin
18 February 2002, 08:54 PM
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Put the old exhaust back on 
I posted a similar question a while back, you'll gain torque higher up the rev band with a less restrictive exhaust. So what you loose in the low's you'll gain in the high's
I posted a similar question a while back, you'll gain torque higher up the rev band with a less restrictive exhaust. So what you loose in the low's you'll gain in the high's
18 February 2002, 09:09 PM
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The only way would be to add a restriction somewhere in the engine inlet or exhaust.
Say hot dog muffler, in the mid section. Or modify the header pipes.
[Edited by submannz - 2/18/2002 9:11:32 PM]
Say hot dog muffler, in the mid section. Or modify the header pipes.
[Edited by submannz - 2/18/2002 9:11:32 PM]
18 February 2002, 09:27 PM
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Thanks mega_stream - I wondered who would be first to suggest putting the old one back on!.
I have a Dawes to fit once I receive my AFR and had thought about getting a 2.5" section made to replace part of the 3" centre section. I don't know what effect that would have or how successful it would be (3" to 2.5" and back to 3"). Any posts I've seen seem to a smaller diameter rear section for torque (3" to 2.5").
I have a Dawes to fit once I receive my AFR and had thought about getting a 2.5" section made to replace part of the 3" centre section. I don't know what effect that would have or how successful it would be (3" to 2.5" and back to 3"). Any posts I've seen seem to a smaller diameter rear section for torque (3" to 2.5").
19 February 2002, 12:29 PM
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Have you done a before and after on the Dyno or rolling road? You might be surprised and find that what you think is lost torque is just a bigger difference between off and on boost due to the more free flowing exhaust.
Brett
Brett
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How exactly does a heavier flywheel increase the torque output ?
21 February 2002, 12:31 AM
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Rev it to 8k and dump the clutch 
that's the only time a heavier flywheel will give you more torque to transfer.....and then it's only for less than a second (if the box lasts)
I suppose the engine would take 'slightly' longer to slow down when you hit a hill but this would barely be measurable IMHO.
Assuming you want better acceleration at low rpm (or any rpm) then a lighter flywheel would actually help, not a heavier one .
cc
that's the only time a heavier flywheel will give you more torque to transfer.....and then it's only for less than a second (if the box lasts)I suppose the engine would take 'slightly' longer to slow down when you hit a hill but this would barely be measurable IMHO.
Assuming you want better acceleration at low rpm (or any rpm) then a lighter flywheel would actually help, not a heavier one .
cc
04 March 2002, 02:19 PM
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Dawes has restored torque & responsiveness!!. Now running peak .95 bar (want to stay sensible & safe). Dawes AFR runs blue on part and full throttle - is anyone with the Dawes AFR getting similar results?
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