tufesp351

hi im looking at getting a set of Underdrive pulleys for my xr8 just wondering what peoples addvice on them are and if any one as had trubble with them on the 6spd box . What brand would u recomend and should i got for the street or race series

CanberraDave

I'm running bpt race underdrives, had them fitted by Michael at omega automotive in Guildford, Sydney(really knows his stuff). No probs so far on my 5 spd box but they've only done about 5,000km. From what I understand a clutch upgrade is more or less inevitable with these cars if you mod them and give them a bit - as you would expect with any car. Underdrives seem to work well though - motor tends to rev up a lot quicker, as if you were in a lower gear.

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BA Mk1 XR8 manual, bpt underdrives, coated paceys, 3inch zorst, ss cai and bmc filter, bpt powerpipe and powerstat, herrods helix, hi flo cats, Bluepower/Xtreme Edit - 248.9rwkw - thanks guys

RATT

I can back Daves recommendation of Omega Automotive. Give Michael a call and he;ll let you know. No known issues with a 6 speed as a number have already been done without any problems.

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BF XR6 Turbo

XR8ME

What sort of Dollars would you be looking at to have one supplied and fitted?

IW84NO1

i had problems with my underdrives would suck the clutch to the floor aparently very few do it and the only way to fix it was too upgrade clutch

xr220

In the last issue of Blueprint FPV suggested (in fact it was a full page article) that modifying your underdrive pulley was very risky as it impacted on the balance of the engine and it's ability to run correctly.

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HSV, I don't want one

Noboss

Keep away from them all together, They are more trouble than there worth.
Nearly all the so called Ford enhancment joints have them & have had trouble in one sort or an other.. They also give very little in the way of power increase.
As has been mentioned: read the last issue of blueprint that will open your eyes to the trouble they can cause...

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TS50 no-125
TE50 no-94
"The TE50 is the best high performance sedan Australia has ever produced"
Street machine Feb 2002
TE50T3 Remember the GTHO? well your getting close.
Motor mag Jan 2002
Wouldn't you love to say that about your car?You loosers

Goldenboy

I think you you will find they give a better power increase to a Auto and probly less trouble.

ratter

Some of the underrive pulleys available, use no apparant harmonic balancer weight which has been blamed for some of the problems and they are meant for 4.6 motors not our 5.4, powerbond make a underive pulley that still retains a full balancer and I have not heard of any problems with these ones, but not to say there has been no problems.



If you beleive everything ford try to tell you, we would all leave our cars dead stock knowing that is the best power we will get and they will never be a problem.

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There is no substitute for cubic inches but my pursuit sure closes the gap




*UPDATE * Pursuit has just run 11.763 and 116.18 mph making it Australias Quickest and fastest unopened boss as well as Australias Quickest and fastest naturally aspirated Boss

DABOSS

I for one can say that in using both UD bpt and powerbond, That the BPT under drives are in fact made fo the 4.6 not 5.4 and will 100% cause your engine to fail due to the oil pump gears even though they are a known issue, It just speeds up this process.

The Powerbond UD on the other hand are in fact fantastic once I'd fitted the UD I noticed that the engine was nicer on idle and thoughout the rev range , As for power I haven't lost anything in the way of performance , Still one of the quickest street trim GT out there. So I would have to say there a good thing.