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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Performance Numbers, Which Ones Matter Most to You?



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      09-03-2016, 08:45 AM   #1
pits200
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Performance Numbers, Which Ones Matter Most to You?

With all the big hp builds(relative to this platform) and rapid growth over the past year, we still don't see the hp numbers translating except in roll races.

So for the people who have done builds or people who plan, what numbers matter most to you from most to least.(strictly speed related)

WHP
0-60
1/8th
1/4th
60-130
Trap


For me
1/4th
Trap
1/8th
0-60
WHP
60-130
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      09-03-2016, 09:22 AM   #2
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These engines are solid, but the drivetrains are weak so not many people are willing to take their cars to the drag strip.
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      09-03-2016, 10:03 AM   #3
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Trap speeds
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      09-03-2016, 11:41 AM   #4
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trap speed all the way. Even if you have the worst launch in the world, your trap speed will show the true potential. You can estimate WHP and 1/4 mile time based on trap speed.
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      09-03-2016, 01:29 PM   #5
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Quote:
Originally Posted by pits200 View Post
With all the big hp builds(relative to this platform) and rapid growth over the past year, we still don't see the hp numbers translating except in roll races.

So for the people who have done builds or people who plan, what numbers matter most to you from most to least.(strictly speed related)

WHP
0-60
1/8th
1/4th
60-130
Trap


For me
1/4th
Trap
1/8th
0-60
WHP
60-130
Lap times, these cars are made to turn!

Last edited by Shane303; 09-03-2016 at 01:42 PM..
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      09-03-2016, 01:40 PM   #6
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Trap Trap Trap...
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      09-03-2016, 02:25 PM   #7
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Traps are good but I prefer 30-130, 60-130, 100-200kph, etc. It takes all the variables of a launch out of the equation and leaves pure acceleration #'s. Of course you need to have a Vbox, which I do. I use it on all my logs, tune revisions, 1/4 runs, etc. Along with recording the DA, it really quantifies the data and gives you a complete picture of exactly how your car is running.
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      09-03-2016, 04:30 PM   #8
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ET is what matters to me and is what wins races. Trap speeds can be artificially high with excessive wheel spin so means nothing without a good ET to go with it.
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      09-03-2016, 07:22 PM   #9
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Quote:
Originally Posted by blown07 View Post
ET is what matters to me and is what wins races. Trap speeds can be artificially high with excessive wheel spin so means nothing without a good ET to go with it.
So what about no wheel spin ?

ET just mean good traction from a dig and getting off quicker if you have a low trap. It does not mean an ET of 11.7 @ 116 mph is faster than a car doing an ET of 12.5 @ 121 mph

Traps speed differences also tells you the difference in power.

To settle any of this though vBox numbers would be better since it does not require any special launch technique or skill as you do in drag racing
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      09-03-2016, 09:41 PM   #10
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Quote:
Originally Posted by ******** View Post
So what about no wheel spin ?

ET just mean good traction from a dig and getting off quicker if you have a low trap. It does not mean an ET of 11.7 @ 116 mph is faster than a car doing an ET of 12.5 @ 121 mph

Traps speed differences also tells you the difference in power.

To settle any of this though vBox numbers would be better since it does not require any special launch technique or skill as you do in drag racing
Once again my opinion - Quicker ET matters most to me but then again I've been into drag racing for 35years so my opinion is biased....but I do love a roll race every now and again
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      09-03-2016, 10:00 PM   #11
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If you spin.......trap speed means absolutely nothing.
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      09-03-2016, 10:04 PM   #12
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Trap and 60-130
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      09-03-2016, 10:39 PM   #13
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Trap speed... Id prefer a 12.5@127 vs a 11.9@119.

Trap speeds then whp
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      09-04-2016, 01:44 AM   #14
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60-130
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