14.88@94mph with a single power mod (vid) - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Bahraini86 · 03-12-2013, 02:49 AM

Broke own personal record with a 14.88@150km/hr (best time and speed). Car has an injen intake as the only power mod. Running on 18" wheels

[ame="http://www.youtube.com/watch?v=0Yb4x5jF-oY"]Running 14.88@150km/hr in GT86 - YouTube[/ame]

rice_classic · 03-12-2013, 02:52 AM

Tire and tire size?

Bahraini86 · 03-12-2013, 03:00 AM

Quote:

Originally Posted by rice_classic

Tire and tire size?

GramLight 57xtremes 8.5x18 front and 9.5x18 rears with 225/40/18 and 255/35/18 respectively

rice_classic · 03-12-2013, 02:01 PM

I'd be curious if the 255 rears and 18x8.5" wheels hurt or helped your time. I'm sure the extra tire helped your launch but the significantly higher rotational mass.

From an science viewpoint, it'd be fun to take your stock wheels out and do back to back runs to see if the bigger wheels/tires are an advantage or disadvantage.

Good vid and nice burnout. That's my favorite part of drag racing.

u/Josh · 03-12-2013, 02:51 PM

Quote:

Originally Posted by rice_classic

I'd be curious if the 255 rears and 18x8.5" wheels hurt or helped your time. I'm sure the extra tire helped your launch but the significantly higher rotational mass.

From an science viewpoint, it'd be fun to take your stock wheels out and do back to back runs to see if the bigger wheels/tires are an advantage or disadvantage.

Good vid and nice burnout. That's my favorite part of drag racing.

The effect of extra wheel weight on straight line acceleration is not that much. I'd guess he is faster with the wider, stickier tires. Especially if he has stock tires on those stock wheels.

Chimpo · 03-12-2013, 03:00 PM

Quote:

Originally Posted by rice_classic

I'd be curious if the 255 rears and 18x8.5" wheels hurt or helped your time. I'm sure the extra tire helped your launch but the significantly higher rotational mass.

From an science viewpoint, it'd be fun to take your stock wheels out and do back to back runs to see if the bigger wheels/tires are an advantage or disadvantage.

Good vid and nice burnout. That's my favorite part of drag racing.

I thought you would want more sidewall when drag racing? The side wall gives more to lessen the tire breaking free? Granted, I am talking about slicks, but from all my drag racing days I don't remember the best times being cut with big rims/little sidewall.

[ame]http://youtu.be/HldiiDmvTxI[/ame]

SloS13 · 03-12-2013, 03:03 PM

That's hilarious. Minute long burnout on street tires for a 15 second run.

husker741 · 03-13-2013, 01:24 AM

It makes you wonder how some of these magazines got their 14.6 times on stock tires, with a stock car.

rice_classic · 03-13-2013, 01:30 AM

Quote:

Originally Posted by Chimpo

but from all my drag racing days I don't remember the best times being cut with big rims/little sidewall.

Are you theorizing that if he put on 16" wheels (even less weight) and used a tire of the stock width (taller sidewall) but is a much stickier tire like a treadwear rating of sub-200 he could accomplish both a better launch and reduced rotational resistance.

Alright Bahrain... time for some more testing!

Bahraini86 · 03-13-2013, 10:29 AM

Quote:

Originally Posted by SloS13

That's hilarious. Minute long burnout on street tires for a 15 second run.

At least I got this pic

bpracer · 03-15-2013, 07:11 AM

That's a great picture!

wparsons · 03-15-2013, 04:46 PM

Quote:

Originally Posted by SloS13

That's hilarious. Minute long burnout on street tires for a 15 second run.

Even worse, most street tires grip worse after a burnout. Best launch would be skipping the water box and just giving them a quick spin to throw any loose debris off them. You should only do a burnout with proper drag radials or slicks.

d1ck · 03-15-2013, 11:45 PM

Quote:

Originally Posted by wparsons

Even worse, most street tires grip worse after a burnout. Best launch would be skipping the water box and just giving them a quick spin to throw any loose debris off them. You should only do a burnout with proper drag radials or slicks.

Any good street tire will benefit from a small amount of heat. (Star Spec, RS3, Kumho XS, RT-615K are the ones I have experience with) Although, some are easier to overheat than others.

Bahraini86 · 03-16-2013, 12:04 PM

Quote:

Originally Posted by d1ck

Any good street tire will benefit from a small amount of heat. (Star Spec, RS3, Kumho XS, RT-615K are the ones I have experience with) Although, some are easier to overheat than others.

I have tried many techniques with these Nitto 555, and for it to hook at 6k RPM launch, it must be heated really well. And the guys wanted an extra few seconds for the cameras

03-12-2013, 02:49 AM	#1
Bahraini86 Senior Member Join Date: Mar 2012 Drives: Toyota GT86 Location: Bahrain Posts: 404 Thanks: 166 Thanked 307 Times in 101 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	14.88@94mph with a single power mod (vid) Broke own personal record with a 14.88@150km/hr (best time and speed). Car has an injen intake as the only power mod. Running on 18" wheels [ame="http://www.youtube.com/watch?v=0Yb4x5jF-oY"]Running 14.88@150km/hr in GT86 - YouTube[/ame] __________________ '73 240z Triple-Carbed '03 350z Supercharged (455whp) '09 135i Twin-Turbocharged (11.85@188km/hr) My 6MT GT86 Build Log My Naturally Aspirated 13.90@98.8mph run

03-12-2013, 02:52 AM	#2
rice_classic Senior Member Join Date: Jun 2012 Drives: Nevermorange FRS Location: Seattle, WA Posts: 4,160 Thanks: 755 Thanked 4,200 Times in 1,803 Posts Mentioned: 77 Post(s) Tagged: 1 Thread(s)	Tire and tire size? __________________ SCCA T4 - FRS

03-12-2013, 02:01 PM	#4
rice_classic Senior Member Join Date: Jun 2012 Drives: Nevermorange FRS Location: Seattle, WA Posts: 4,160 Thanks: 755 Thanked 4,200 Times in 1,803 Posts Mentioned: 77 Post(s) Tagged: 1 Thread(s)	I'd be curious if the 255 rears and 18x8.5" wheels hurt or helped your time. I'm sure the extra tire helped your launch but the significantly higher rotational mass. From an science viewpoint, it'd be fun to take your stock wheels out and do back to back runs to see if the bigger wheels/tires are an advantage or disadvantage. Good vid and nice burnout. That's my favorite part of drag racing. __________________ SCCA T4 - FRS

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SloS13 Senior Member Join Date: Feb 2013 Drives: 2013 FR-S whiteout Location: Columbia, SC Posts: 157 Thanks: 65 Thanked 165 Times in 59 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	That's hilarious. Minute long burnout on street tires for a 15 second run.

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