Benefits of Underdrive Pulley?????
Originally posted by ejj5875
So now that there are perfectly legit numbers on the table that's all you can say? A waste?
What do you think account for his 6hp gain? Magic?
So now that there are perfectly legit numbers on the table that's all you can say? A waste?
What do you think account for his 6hp gain? Magic?
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Posts: n/a
Originally posted by SprintMax
muhahah ...
8 - 10 at the wheels... muhahhaha
what kind of dyno is that? canadian dyno with metric mesurements.. muhahhahaha.. you talking Horsepower? or pony power?
muhahah ...
8 - 10 at the wheels... muhahhaha
what kind of dyno is that? canadian dyno with metric mesurements.. muhahhahaha.. you talking Horsepower? or pony power?
Senior Member
Joined: Dec 2000
Posts: 8,765
From: Westchester County, NY
Originally posted by PhatGuy
Hmmm Canadian dyno?? Well Canada as well as 90%+ of the countries on the planet earth use the metric system. USA is the only country I know of personally that still uses the imperial system.
Hmmm Canadian dyno?? Well Canada as well as 90%+ of the countries on the planet earth use the metric system. USA is the only country I know of personally that still uses the imperial system.
Originally posted by PhatGuy
Hmmm Canadian dyno?? Well Canada as well as 90%+ of the countries on the planet earth use the metric system. USA is the only country I know of personally that still uses the imperial system.
Hmmm Canadian dyno?? Well Canada as well as 90%+ of the countries on the planet earth use the metric system. USA is the only country I know of personally that still uses the imperial system.
Not DAVEB the parts guy
Joined: Aug 2000
Posts: 8,549
Originally posted by medicsonic
So we have one person that dynoed it and got a 6 HP difference, but he hasn't been to the track IN THE SAME CONDITIONS to see if he got 'any faster'. Then we have someone who got .06 faster(), but again hasn't run UNDER THE SAME CONDITIONS, but hasn't dynoed the car. Until you have both dynoed AND run under the same conditions, your emperical data will stay unproven.
So we have one person that dynoed it and got a 6 HP difference, but he hasn't been to the track IN THE SAME CONDITIONS to see if he got 'any faster'. Then we have someone who got .06 faster(
), but again hasn't run UNDER THE SAME CONDITIONS, but hasn't dynoed the car. Until you have both dynoed AND run under the same conditions, your emperical data will stay unproven.
Who here thinks Sprint and Med will be in line to buy UDPs once they ride in a Max with one installed, more less get pulled on by one
Dave
Originally posted by Dave B
Who here thinks Sprint and Med will be in line to buy UDPs once they ride in a Max with one installed, more less get pulled on by one
Dave
Who here thinks Sprint and Med will be in line to buy UDPs once they ride in a Max with one installed, more less get pulled on by one
Dave
:
so i am not worried about it..
Senior Member
Joined: Dec 2000
Posts: 8,765
From: Westchester County, NY
Originally posted by Dave B
Alright, the NHRA has said that for every 10 degrees in temp over 60 degrees, you loose about 2% of your power. Ideal racing temps are between 50-60 degrees. With all that said, I've run much higher trap speeds WITH the UDP in MUCH warmer temps than I ran my best. I'm only 0.02 off my best and I was exceeding my best trap speeds by over 1mph. Without the UDP I NEVER got any better than 94.01mph. With the UDP, I've run almost all 94-95mph+ trap speeds (unless I had a bad launch or shift). That right there says my car is stronger especially when I'm running in warmer weather (70s+) vs my best in cooler weather (40s). By your post, it appeats you're suggesting that I will probably run slower in cooler weather. What kind of racer are you? Benchracer? Most gearheads know that trap speed is a clear indicator of how fast the car can really be. I will be dynoing next Saturday and I plan on putting this debate COMPLETELY to rest.
Who here thinks Sprint and Med will be in line to buy UDPs once they ride in a Max with one installed, more less get pulled on by one
Dave
Alright, the NHRA has said that for every 10 degrees in temp over 60 degrees, you loose about 2% of your power. Ideal racing temps are between 50-60 degrees. With all that said, I've run much higher trap speeds WITH the UDP in MUCH warmer temps than I ran my best. I'm only 0.02 off my best and I was exceeding my best trap speeds by over 1mph. Without the UDP I NEVER got any better than 94.01mph. With the UDP, I've run almost all 94-95mph+ trap speeds (unless I had a bad launch or shift). That right there says my car is stronger especially when I'm running in warmer weather (70s+) vs my best in cooler weather (40s). By your post, it appeats you're suggesting that I will probably run slower in cooler weather. What kind of racer are you? Benchracer? Most gearheads know that trap speed is a clear indicator of how fast the car can really be. I will be dynoing next Saturday and I plan on putting this debate COMPLETELY to rest.
Who here thinks Sprint and Med will be in line to buy UDPs once they ride in a Max with one installed, more less get pulled on by one
Dave
Supporting Maxima.org Member
Joined: Aug 2001
Posts: 1,362
Originally posted by Dave B
The only downside to the UDP with a 5 speed is the fact that it is harder to start smoothly off the line and on the 1-2 shift.
Dave
The only downside to the UDP with a 5 speed is the fact that it is harder to start smoothly off the line and on the 1-2 shift.
Dave
Edit - BTW I have a 5 speed. (forgot the sigs where still down)
Originally posted by Anachronism
Anyone else with an UDP notice this? I am considering this Mod in the future and you guys almost have my convinced it's worth it, but I do not want to do anything that hurts the smoothness and drivability of my 'family car'.
Anyone else with an UDP notice this? I am considering this Mod in the future and you guys almost have my convinced it's worth it, but I do not want to do anything that hurts the smoothness and drivability of my 'family car'.
Not a big deal. Oh, and I'd imagine that it would only apply to 5-speeds.
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