ENGINE PULLEYS
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Wurzel, how you do quantify a hell of a difference? i dont want to be picky or start an argument, but my own car with a full set of pulleys and a 4.6KG flywheel has made a *small* amount of difference. Feels nice reving it at a standstill but actual performance is not really noticeable.
IMHO they are worth it as a bit of bling, but money is better spent elsewhere if you are after performance.
IMHO they are worth it as a bit of bling, but money is better spent elsewhere if you are after performance.
#4
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no mater what you decide stay away from 'Kent' pulleys (as in kent cams), i know of one court case going on due to part failure, also know about 4 or 5 people who have had them fail.
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Originally Posted by p1mark
Wurzel, how you do quantify a hell of a difference? i dont want to be picky or start an argument, but my own car with a full set of pulleys and a 4.6KG flywheel has made a *small* amount of difference. Feels nice reving it at a standstill but actual performance is not really noticeable.
IMHO they are worth it as a bit of bling, but money is better spent elsewhere if you are after performance.
IMHO they are worth it as a bit of bling, but money is better spent elsewhere if you are after performance.
I do not have many engine mods on my car but with the few I have my car was mapped to around 340ps by Bob Rawle, with 4 adults in the car at the time.
the mods I have are
Lightened flywheel 4.5kg
Perrin pulley 500g
SS decat DP
Prodrive PPP centre pipe
T75 back box
3port solenoid
VF24 Turbo
APS CAK
and mapped using a mixture of 95 and 100ron petrol as we get 100ron over here.
Result is a missile on wheels.
So TBH I can not answer why you got next to no benefit from your pulley and flywheel change but believe me I did.
Last edited by Wurzel; 05 April 2006 at 02:46 PM.
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I have had a 4.6 kilo flywheel fitted to my STi with no lightweight pulleys and that has made a great difference for the better.
What pulleys make the biggest change once lightened as I'm thinking it might be worthwhile
What pulleys make the biggest change once lightened as I'm thinking it might be worthwhile
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nice one - maybe my *** is too fat and insensitive to notice!
the theory actually says gear changes wont be as smooth. for the same reason the engine picks up RPM quickly, it will loose them quickly as well. hence more RPM drop when you dip the clutch and less off an even RPM/road speed match to slot the gear home.
I agree with everything you say (feels responsive, bit more difficult to launch etc ) about a pulley/flywheel combo, apart from the massive diference you can feel.
the theory actually says gear changes wont be as smooth. for the same reason the engine picks up RPM quickly, it will loose them quickly as well. hence more RPM drop when you dip the clutch and less off an even RPM/road speed match to slot the gear home.
I agree with everything you say (feels responsive, bit more difficult to launch etc ) about a pulley/flywheel combo, apart from the massive diference you can feel.
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It would be nice for someone to some dyno work before and after with flwheels/pulleys.
Alloy? you were on a dyno not so long ago , before you fitted the flywheel.
Alloy? you were on a dyno not so long ago , before you fitted the flywheel.
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Originally Posted by p1mark
nice one - maybe my *** is too fat and insensitive to notice!
the theory actually says gear changes wont be as smooth. for the same reason the engine picks up RPM quickly, it will loose them quickly as well. hence more RPM drop when you dip the clutch and less off an even RPM/road speed match to slot the gear home.
I agree with everything you say (feels responsive, bit more difficult to launch etc ) about a pulley/flywheel combo, apart from the massive diference you can feel.
the theory actually says gear changes wont be as smooth. for the same reason the engine picks up RPM quickly, it will loose them quickly as well. hence more RPM drop when you dip the clutch and less off an even RPM/road speed match to slot the gear home.
I agree with everything you say (feels responsive, bit more difficult to launch etc ) about a pulley/flywheel combo, apart from the massive diference you can feel.
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Originally Posted by p1mark
It would be nice for someone to some dyno work before and after with flwheels/pulleys.
Alloy? you were on a dyno not so long ago , before you fitted the flywheel.
Alloy? you were on a dyno not so long ago , before you fitted the flywheel.
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Thats the rooute I'll be going down so, when the time comes I will post my findings!
Underdriven or lightened pulleys which is the best for a 2001 WRX bugeye?
RR
Underdriven or lightened pulleys which is the best for a 2001 WRX bugeye?
RR
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Originally Posted by Rice Rocket
Thats the rooute I'll be going down so, when the time comes I will post my findings!
Underdriven or lightened pulleys which is the best for a 2001 WRX bugeye?
RR
Underdriven or lightened pulleys which is the best for a 2001 WRX bugeye?
RR
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Originally Posted by alloy
from what i've read lightened are better than underdriven but thats not gospel so wait for some one more clued up to pop along
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Originally Posted by BVM
Just remember even though boxer engines are 'naturally' more balanced than their in line counterparts, you are removing the harmonic balancer when installing a lightened crank pulley!
and what does this mean exactly..?
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I got a 5.4 kg kaiten chromoly flywheel on my MY03 WRX since last week. Definate difference, as per what is stated above really.
Can tell the car fires up a lot quicker. I dont have any problems inbetween gears but you do need more gas to match the revs. But i find the revs stay better matched? Anyway, that one could be just in my head.
More pro's that con's imho.
Can tell the car fires up a lot quicker. I dont have any problems inbetween gears but you do need more gas to match the revs. But i find the revs stay better matched? Anyway, that one could be just in my head.
More pro's that con's imho.
#17
Hi guys!
We have just finished out latest design for the crank pulley,
The are now stock size but weigh the same as underdrive pulleys-
Check them out in our store...
My WRX the home of WRX cars
Can offer discount on these,
Chris
CDF Racing, performance pulleys
We have just finished out latest design for the crank pulley,
The are now stock size but weigh the same as underdrive pulleys-
Check them out in our store...
My WRX the home of WRX cars
Can offer discount on these,
Chris
CDF Racing, performance pulleys
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pulleys....
they look nice, you will not feel much difference IMO, underdriven can cause problems with alternator loads etc etc.
you will feel a much better difference with a flywheel.
they look nice, you will not feel much difference IMO, underdriven can cause problems with alternator loads etc etc.
you will feel a much better difference with a flywheel.
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