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Old 04-25-2010, 01:19 AM   #1
Innovative Tuning
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Default Skyline GT-R powered E30 BMW - sharing something different...

I know it's not a Subaru, but it's a cool car I thought some of you might want to have a look at.


Event: dyno tuning
Location: Innovative Tuning. Buffalo, NY 14216
Ambient Temp: ~72
Elevation: ~700 feet above sea level
Weather: partly cloudy
Tires: all seasons

Car: 1986 BMW 3 series
Tuner: Mike at Innovative Tuning
Dyno Info: Mustang AWD 500 SE
Peak HP at RPM: 495
Peak Torque at RPM: 399
Baseline hp/tq for a stock on same dyno: ~180 whp for AP1 S2000
Target Boost: 26 psi spike then 25 psi mainly due to some wheelspin
Target AFR: ~11.4 at 24 psi, 11.2 at 25 psi
Fuel: 93 unleaded. No external injection.
Engine/Power Modifications:
R32 Skyline GT-R RB26DETT with GT35R single turbo conversion.
Driveline Modifications: RB26 AWD tranny converted to RWD, custom driveshaft, etc. etc.
Suspension Modifications: not relevent
Other Modifications: ViPec standalone ECU



A few weeks ago I tuned the car for break in and so the owner could go over the car and get used to it before cranking the boost up. Today the boost went up.

It's an E30 chassis BMW with a Skyline GT-R RB26DETT engine in it:




After checking to make sure the car was running as I left it, I started bringing the wastegate duty cycle up until the boost went over the 8 psi wastegate spring pressure. As the boost started to go up it was clear that I would be able to achieve Newman's goal of 450 whp on 93 octane with no external injection.




Here's a graph showing some of the pulls during the tuning process. I've chosen these ones since they're close to the boost levels we decided on for the boost by gear setup I've calibrated via the ViPec standalone ECU.




After the pull to 449 whp shown above Newman and I decided we had to go a bit further to break the 450 whp barrier. I knew there was a good amount of room left to grow so I bumped the boost up a bit and made a small timing adjustment which resulted in a pull that I aborted because the car spun the tires hard on the dyno.

After adding some weight to the trunk and adding some volunteer "passengers", we were able to get a pull in with less wheelspin. You can still see when it spins going into boost in the following video:

high quality vimeo video:


low quality youtube video:
http://www.youtube.com/user/Innovati.../0/Pxia2HzC3QA


And here's the graph of the high pull in the video:





After dyno tuning was complete, I set up gear calculation and then boost by gear which is now set to provide 12 psi in 1st and 2nd gear, 16 ish in 3rd gear, 22 ish in 4th and a little more in 5th gear. In the future if Newman adds a wheel speed sensor on a non driven wheel I can set up active traction control for him using % slip calculation based response to get the most performance out of the available traction.

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Last edited by Innovative Tuning; 05-02-2010 at 01:46 PM.
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Old 04-25-2010, 01:41 AM   #2
maxpowr
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thats ill.
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Old 04-25-2010, 01:52 AM   #3
RexMex
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yep. ill.
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Old 04-25-2010, 01:53 AM   #4
jasv11
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Awesome Work!!
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Old 04-25-2010, 01:58 AM   #5
1_STi_2NV
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That's pretty awesome....
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Old 04-25-2010, 02:09 AM   #6
verc
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wow - projects like these are basically the textbook definition of automotive badassery.

Send my compliments to the owner! He's a true car nut
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Old 04-25-2010, 02:18 AM   #7
under5
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boss.
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Old 04-25-2010, 02:25 AM   #8
El_Terible
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mid 2000lb platform with all that power. Looks tons of fun.
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Old 04-25-2010, 02:35 AM   #9
jigga
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Impressive stuff! I need a ride in that one now
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Old 04-25-2010, 03:10 AM   #10
CKxx
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Your BOV sounds lame
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I'm surprised a 35r spools that late on a 6cyl. That is probably a fun ride. Did you get to road test it?
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Old 04-25-2010, 07:31 AM   #11
KP
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6 cylinder yeah, but it's still only 2.6l....
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Old 04-25-2010, 11:07 AM   #12
Innovative Tuning
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and 06 STI daily

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Fixed vimeo video permissions.

Last edited by Innovative Tuning; 04-25-2010 at 11:18 AM.
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Old 04-25-2010, 11:08 AM   #13
Innovative Tuning
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and 06 STI daily

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It actually makes 25 psi at 4500 rpm on the street in 4th gear, but I did make the boost ramp less violent which slows reaching peak boost a little. Initial torque spikes break the tires loose and once they spin hard they'll just keep spinning through the whole gear. The car is more drivable and faster with boost coming on in a more linear fashion rather than ramping up like a wall.

I made the owner drive for the road test and only did enough to get the boost by gear settings dialed, then had him drop me off. He had me set it so the car spun a manageable amount in each gear when rolling into it going straight. After I got out he tested the car at higher speeds and said at 120 in the middle of 4th it spun badly so he may have me lower the 4th gear boost.

Last edited by Innovative Tuning; 04-25-2010 at 11:29 AM.
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Old 04-25-2010, 11:14 AM   #14
LatentWagen
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Care to share any underhood shots? I-6 replacing I-6, right? How much room is in that engine bay

Also, any idea as to the current F/R balance of the car with the TT motor in there?
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Old 04-25-2010, 11:49 AM   #15
squashman
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What is the weight of the car? 299lbs ? No really, 500WHP is serious, but there are many cars out there with 500WHP (legitimate, not brojet #'s) that don't have such bad wheel spin problems. I assume this thing must be really light if you couldn't even strap it down tight enough on the dyno...?
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Old 04-25-2010, 11:51 AM   #16
Kastley85891
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That is just great
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Old 04-25-2010, 11:54 AM   #17
jigga
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Quote:
Originally Posted by midnite_wrex View Post
Care to share any underhood shots? I-6 replacing I-6, right? How much room is in that engine bay

Also, any idea as to the current F/R balance of the car with the TT motor in there?
I believe that the car came with a 4 cylindr engine initially...
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Old 04-25-2010, 11:56 AM   #18
Gilmore25
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Nice Project owner is going to need to invest in some tires to handle that power
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Old 04-25-2010, 12:27 PM   #19
LatentWagen
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Quote:
Originally Posted by jigga View Post
I believe that the car came with a 4 cylindr engine initially...
Well the E30 325i has an I-6, so the 6 fits without a doubt (not sure whether this car was a 4 or 6)... I'm just curious to see what an RB looks like under there.
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Old 04-25-2010, 12:29 PM   #20
LatentWagen
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Quote:
Originally Posted by Gilmore25 View Post
Nice Project owner is going to need to invest in some tires to handle that power
Those look pretty capable for 350 wtq, not everybody has a lead right foot
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Old 04-25-2010, 01:41 PM   #21
PHATsuby
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This is a sweet car.

On the 495 run was there some knock? Looked like a few puffs mid way through the pull which I assume was knock correction pulling timing/adding fuel? Doesn't show on the graph though so that's why I am curious.

Awesome job, truly a sweet car and project.

Ben
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Old 04-25-2010, 02:29 PM   #22
DSM_Outback
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Quote:
Originally Posted by midnite_wrex View Post
Care to share any underhood shots? I-6 replacing I-6, right? How much room is in that engine bay

Also, any idea as to the current F/R balance of the car with the TT motor in there?
http://forums.nasioc.com/forums/show....php?t=1972166
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Old 04-25-2010, 02:29 PM   #23
jigga
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Quote:
Originally Posted by midnite_wrex View Post
Well the E30 325i has an I-6, so the 6 fits without a doubt (not sure whether this car was a 4 or 6)... I'm just curious to see what an RB looks like under there.
My mistake... I could have sworn it was mentioned that it had a 4.

There is another thread around here with more pics of the car.. I'll dig it up

Edit:
here
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Old 04-25-2010, 02:50 PM   #24
PhatBotti Tuning TKR
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Awesome job guys. I always love seeing something out of the norm in this community.

Will this car be entering in any drag racing / drifting competitions in the tri-state area?

I'd love to come out and see it in person.

-Mikey
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Old 04-25-2010, 06:11 PM   #25
WREX88
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so cool!
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