Cam & gear matching, does this make sense?
#1
Cam & gear matching, does this make sense?
I have a 4600 stall and 3.23 gears, which means it's unGodly loose on the street.
Let's say I have a TR224 making 345 ft/lbs of torque @ 3k RPM. Let's also say that hypothetically, I went to a bigger cam which makes 320 ft/lbs of torque @ 3k.
So 320/345=.93, meaning I'll be making 7% less power at 3k.
Now let's also say I have a set of 3.42s sitting in my garage which I can throw in to help with the looseness.
So 3.23/3.42=.94 meaning I'll have 6% more gear.
Since 6%<7%, does this mean the converter will feel even more loose or does this equation not work in this situation?
Sorry for all the math and hypotheticals
Let's say I have a TR224 making 345 ft/lbs of torque @ 3k RPM. Let's also say that hypothetically, I went to a bigger cam which makes 320 ft/lbs of torque @ 3k.
So 320/345=.93, meaning I'll be making 7% less power at 3k.
Now let's also say I have a set of 3.42s sitting in my garage which I can throw in to help with the looseness.
So 3.23/3.42=.94 meaning I'll have 6% more gear.
Since 6%<7%, does this mean the converter will feel even more loose or does this equation not work in this situation?
Sorry for all the math and hypotheticals
#2
Banned
iTrader: (2)
Originally Posted by BADFNZ
I have a 4600 stall and 3.23 gears, which means it's unGodly loose on the street.
Let's say I have a TR224 making 345 ft/lbs of torque @ 3k RPM. Let's also say that hypothetically, I went to a bigger cam which makes 320 ft/lbs of torque @ 3k.
So 320/345=.93, meaning I'll be making 7% less power at 3k.
Now let's also say I have a set of 3.42s sitting in my garage which I can throw in to help with the looseness.
So 3.23/3.42=.94 meaning I'll have 6% more gear.
Since 6%<7%, does this mean the converter will feel even more loose or does this equation not work in this situation?
Sorry for all the math and hypotheticals
Let's say I have a TR224 making 345 ft/lbs of torque @ 3k RPM. Let's also say that hypothetically, I went to a bigger cam which makes 320 ft/lbs of torque @ 3k.
So 320/345=.93, meaning I'll be making 7% less power at 3k.
Now let's also say I have a set of 3.42s sitting in my garage which I can throw in to help with the looseness.
So 3.23/3.42=.94 meaning I'll have 6% more gear.
Since 6%<7%, does this mean the converter will feel even more loose or does this equation not work in this situation?
Sorry for all the math and hypotheticals
Bret
#3
Originally Posted by SStrokerAce
Are we just talking about street driving or are you concerned more with track performance?
Bret
Bret
#4
Banned
iTrader: (2)
Well the lower TQ around stall will bring down the stall RPM, and the bigger gear will let you drive around at a higher RPM where there is less slippage so it will not feel as loose.
That help?
I'm just thinking about the match of the cam to the RPM range of the motor (stall to shift point) and how the gears should be matched to that in terms of weight, power, tire size etc....
Bret
That help?
I'm just thinking about the match of the cam to the RPM range of the motor (stall to shift point) and how the gears should be matched to that in terms of weight, power, tire size etc....
Bret
#5
Originally Posted by SStrokerAce
I'm just thinking about the match of the cam to the RPM range of the motor (stall to shift point) and how the gears should be matched to that in terms of weight, power, tire size etc....
Bret
Bret
And considering the small RPM range and slippage, I don't think there will be that much of a difference in RPM through the traps from a 3.42 to say a 3.73 or something. This is with a pretty much stock weight and a 26" tire. Yeah I might get a slightly better advantage with the 3.73, but since I'm still on the 10-bolt, I think the 3.42 might be a better choice.
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#9
TECH Senior Member
3:42's will not help much IMO, I would go minimum 3.73
I drive a similar range cam 224/220 and a VIG 3200 2.5 str with 3.73's and at proper idle you can feel some looseness but it does fine.
For A4's 3.73's are good gears.
I drive a similar range cam 224/220 and a VIG 3200 2.5 str with 3.73's and at proper idle you can feel some looseness but it does fine.
For A4's 3.73's are good gears.