Underdrive pulley question.
#1
Join Date: Oct 2007
Location: Up North, MN
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Underdrive pulley question.
As a warning to those who will post and saying one way or the other if they are good or bad without actually having a pulley done on you 4.0SOHC please do not reply.
For those of you who are running them I have a few questions (This means you Rich):
1-Do you feel that it is worth the cost?
2-What kind of power gains? (I have seen Riches sheet)
3-Any difference in fuel economy?
4-Is it worth the money to get the complete pulley kit? Or just the Underdrive Crank pulley?
Thank you
For those of you who are running them I have a few questions (This means you Rich):
1-Do you feel that it is worth the cost?
2-What kind of power gains? (I have seen Riches sheet)
3-Any difference in fuel economy?
4-Is it worth the money to get the complete pulley kit? Or just the Underdrive Crank pulley?
Thank you
#2
For those of you who are running them I have a few questions (This means you Rich):
1-Do you feel that it is worth the cost?
2-What kind of power gains? (I have seen Riches sheet)
3-Any difference in fuel economy?
4-Is it worth the money to get the complete pulley kit? Or just the Underdrive Crank pulley?
1-Do you feel that it is worth the cost?
2-What kind of power gains? (I have seen Riches sheet)
3-Any difference in fuel economy?
4-Is it worth the money to get the complete pulley kit? Or just the Underdrive Crank pulley?
2 Most impressive is tip in power at lower rpms.
3 A little but not too much.
4 I'm not sure. Do the other pullies speed up the accessories or do they further slow them?
I'd not slow them anymore. And if I lived in the south I'd want to speed the water pump up a bit.
tip 1: I've sped up my Park and Neutral idle speed to 800 rpms to help ac, cooling, and voltage performance. Last week I cruised woodward for 10hrs in mid 80s temps. I had the Drive idle set at 700 and the Neutral idle set at 900. Had absolutely ZERO problems. Hottest it got was 220F (e-fan set to come on at 215)
tip 2: Get a "84.5 belt" (not a 84.0 and not a 85.0 Trust me. I've got all three. The 84.5 is what you want)
Rich
#3
wondering the exact same thing.. not getting a programmer ( had a bad experience with one) so thinking this is my best bet to get a little more oomph... i believe the water pump pulley is also sped down? sent an enquiry to underdog performance ( they have kit that includes all 3 plus belt) but wondering if alternator pulley neccesary and get the tensior pulley instead...seems all fords have a problem with noisy pullies! lol though i think my p/s pulley maybe the noisiest
#6
#10
The 4.0L crank pulley **is a damper**
btw, it's simply a ASP 4.0L unit.
As far as a bad tuner experience... I've said it before and I'll say it again. A tune is only as good as the guy writing & researching it.
Doug had my engine tuned fine. But the tranny functions.. well those he completely ignored even though I specifically asked for changes.
I got fed up with all these so called "tuners" and just bought the software to do it myself. Glad I did too.
Rich
btw, it's simply a ASP 4.0L unit.
As far as a bad tuner experience... I've said it before and I'll say it again. A tune is only as good as the guy writing & researching it.
Doug had my engine tuned fine. But the tranny functions.. well those he completely ignored even though I specifically asked for changes.
I got fed up with all these so called "tuners" and just bought the software to do it myself. Glad I did too.
Rich
#11
#15
#17
I have been hearing this allot! Ive heard they do and that they don't. Not sure what to believe. I know it will draw the same temp. air from the same location but seems like the k&n cone filter will increase the volume of air. Anybody who has one that can verify no gains?
#18
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I have been hearing this allot! Ive heard they do and that they don't. Not sure what to believe. I know it will draw the same temp. air from the same location but seems like the k&n cone filter will increase the volume of air. Anybody who has one that can verify no gains?
#20
what one u looking at?
http://www.knfilters.com/search/prod...x?Prod=57-2561
#21
#22
This k&n site say 13.45 hp gain.
what one u looking at?
http://www.knfilters.com/search/prod...x?Prod=57-2561
what one u looking at?
http://www.knfilters.com/search/prod...x?Prod=57-2561
SOHC must be 13.45hp gain
http://knfilters.com/search/product.aspx?Prod=57-2527
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