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Motorsports & Track Forum
From Auto-X to Trackday to Racing and Professional Motorsports this is the place to discuss making BMWs fast

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Old 10-13-2016, 12:07 PM   #1
imagine-02
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Join Date: Mar 2012
Location: WI
Posts: 39
My Ride: 330i
E46 330i NASA TT

In the planning stages of building my E46 for the TTD class in NASA Time Trials.



NASA Time Trial B-F Classes
2003 330i sport pkg (m-tech 1 bumpers and side skirts, 6 speed manual, etc)

3285 Base Weight / Listed Weight
3285 Minimum Competition Weight
TTE Base Class
7 Asterisk Points
245 Actual Largest Tire Size
235 Base Class Tire Size

39 of 39pts up one class to TTD
Tires
+7pts A6 (Hankook TD - Dry) or +6pts A7 (Toyo RA-1 or R888 - Wet)
+1pt A10 (10mm wider tires)
Engine
+1pt C4 (CAI)
+1pt C10 (ECS aluminum water pump pulley)
+5pts C22 (custom headers and exhaust)
Drivetrain
+3pts D5 (M-Factory LSD)
Suspension
+3pts E3 (Fortune Auto 500 Coilovers)
+2pts E5 (Fortune Auto 500 Coilovers)
Brakes/Chassis
+2pts F1 (front BBK)
Aerodynamics
+3pts G1 (m-tech 1 front bumper)
+3pts G2 (front splitter and bottom of m-tech 1 bumper could be considered a splitter too)
+1pt G7 (m-tech 1 rear bumper)

Other modifications
Fixed-back racing seats
Bolt-in roll bar
5 point Harnesses
OEM 5 series shifter lever
OEM M3 engine and transmission mounts
Turner rear subframe mounting points reinforcements
Poly RTAB (will probably switch to OEM Z3)
Z3 offset FCAB
Wheel stud conversion
Stainless steel braided brake lines
17x9 or 17x9.5 wheels (Dry) 17x8.5 wheels (Wet)

Dyno re-class
18.945? Adjusted weight/HP ratio
3400? Competition weight
190? WHP
+0.2 (4 door)
+0.8 (DOT tire 245 or smaller)

Class limits
10.50 TTB
12.00 TTC
14.25 TTD
16.50 TTE
19.50 TTF

Last edited by imagine-02; 10-13-2016 at 05:49 PM.
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Old 10-14-2016, 05:59 PM   #2
rsrdan
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Join Date: Sep 2013
Location: bedford PA
Posts: 57
My Ride: 1991 Bmw 2001 325ci
Looks good...I also may TT my 325ci..been going over points trying not to out class myself

I also may TT a Mini Cooper base.2315lbs with me,so around 2115 dry( might have a hard time getting it that light)

...time will tell!!
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Old 10-15-2016, 07:08 AM   #3
dji203
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Join Date: Jul 2009
Location: New York City
Posts: 337
My Ride: E86 N52, F25 N55
Are those class limits up to date?

TTB is gone in 2017, replaced by TT4 and while TTC-F remain I believe the adj wt/hp ratios for TTD is 15:1 and TTC is 14.5:1.
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Last edited by dji203; 10-15-2016 at 07:27 AM.
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Old 10-15-2016, 10:10 AM   #4
imagine-02
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Join Date: Mar 2012
Location: WI
Posts: 39
My Ride: 330i
The info I have is what can be currently downloaded from NASA. I'm not involved with NASA currently so I don't know anything about future rule changes. I've only done a few HPDE with a different organization so far. I'm hoping by the time I get my TT license this chassis is still competitive in letter classes.
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Old 10-15-2016, 02:54 PM   #5
Rob43
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Location: Richmond VA
Posts: 8,006
My Ride: 03 331Ci 5spd R1200R
Do you already own the "Fortune Auto 500 Coilovers", or is that a suspension you're considering buying ?



Rob43
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Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
I Know How To Fix The Rear "Bouncing" Problem On Your Cheap Coilovers Like: Jom RL FK SE & RK.
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Old 10-15-2016, 03:57 PM   #6
dji203
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Join Date: Jul 2009
Location: New York City
Posts: 337
My Ride: E86 N52, F25 N55
Quote:
Originally Posted by imagine-02 View Post
The info I have is what can be currently downloaded from NASA. I'm not involved with NASA currently so I don't know anything about future rule changes. I've only done a few HPDE with a different organization so far. I'm hoping by the time I get my TT license this chassis is still competitive in letter classes.
The excel file you downloaded will most likely be updated for '17. The info is scattered on their forums and few regional pages but here's one link:

http://nasane.com/time-trial/

Under 2017 seasonal information it has these ratios:

TT Unlimited
TT1 6:1 Average HP
TT2 8:1 Average HP
TT3 10:1 Average HP
TT4 12:1 Average HP
TTC 14.5:1
TTD 15:1
TTE 17:1
TTF No Ratio

Either way I think you'll be above the 15:1 ratio. For some reason I thought the 330i dyno'd higher but looks like you'll be competitive in TTD.

Last edited by dji203; 10-15-2016 at 04:08 PM.
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Old 10-17-2016, 06:01 PM   #7
imagine-02
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Join Date: Mar 2012
Location: WI
Posts: 39
My Ride: 330i
Quote:
Originally Posted by Rob43 View Post
Do you already own the "Fortune Auto 500 Coilovers", or is that a suspension you're considering buying ?
Rob43
Already have these with 8kg/10kg Swift springs and radial bearings. They ride and handle a lot better than my old setup, Tein springs with Koni yellows.

Quote:
Originally Posted by dji203 View Post
The excel file you downloaded will most likely be updated for '17. The info is scattered on their forums and few regional pages but here's one link:

http://nasane.com/time-trial/

Under 2017 seasonal information it has these ratios:

TT Unlimited
TT1 6:1 Average HP
TT2 8:1 Average HP
TT3 10:1 Average HP
TT4 12:1 Average HP
TTC 14.5:1
TTD 15:1
TTE 17:1
TTF No Ratio

Either way I think you'll be above the 15:1 ratio. For some reason I thought the 330i dyno'd higher but looks like you'll be competitive in TTD.
Well that's good to hear. Thanks for the info!
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