Scion FR-S / FT-86 / Subaru BRZ Specs and Options. 200hp / 151 lb-ft tq - Page 31 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

no_name · 11-02-2011, 12:49 PM

Quote:

Originally Posted by Dave-ROR

You will be able to run less. The ECU will retard timing. You will lose performance AND fuel economy so it's completely pointless to do so though.

I don't mind being down on performance to save some money but if it's going to lose economy also then yeah, no point at all.

ryridesmotox · 11-02-2011, 12:54 PM

Quote:

Originally Posted by no_name

I don't mind being down on performance to save some money but if it's going to lose economy also then yeah, no point at all.

It's not worth running a lower grade... #1 fuel economy, #2 if you try and get on it, you will have increased knock retard in the timing, and #3 at tip in on the road (when you go to pass someone on the freeway) your car will knock. That will seriously mess with the motor and can cause ring damage. Run what's recommended, or don't be pissed if you are unlucky enough to ruin a piston's rings.

no_name · 11-02-2011, 02:04 PM

Not all cars that recommend premium actually require it, but they have better performance if you do put it in. The ECU just compensates and you lose some power. I was hoping for a similar case here.
Also, single folding rear seat? No 50/50? I use that to seat 3 people + stuff all the time in my car. This keeps getting worse as a DD. My old 86 was a great DD.

Dragonitti · 11-02-2011, 02:33 PM

Didn't see if anyone posted, not going back, but 1/4 mile calculators based on the 2662lbs @ 200hp should net a 14.5 ET Another calc estimated a 13.6 though.

Sparkplug · 11-02-2011, 02:47 PM

Quote:

Originally Posted by Dragonitti

Didn't see if anyone posted, not going back, but 1/4 mile calculators based on the 2662lbs @ 200hp should net a 14.5 ET Another calc estimated a 13.6 though.

14.5 is probably more like it. 13.6 for those stats is WAY too quick. Maybe with some crazy gearing...

Allch Chcar · 11-02-2011, 03:29 PM

Quote:

Originally Posted by no_name

Just read the newest translation of the spec sheet. Premium fuel? Crap. I hope that's optional and only required for maximum performance.

If it makes you feel any better I'm going to be paying the equivalent of $4.06 a gallon to run E85 (based on BTU content) when 93 octane is only $3.55. ;p

Quote:

Originally Posted by Dave-ROR

You will be able to run less. The ECU will retard timing. You will lose performance AND fuel economy so it's completely pointless to do so though.

^This +1.

Quote:

Originally Posted by Dragonitti

Didn't see if anyone posted, not going back, but 1/4 mile calculators based on the 2662lbs @ 200hp should net a 14.5 ET Another calc estimated a 13.6 though.

I'm surprised no one did that recently. And since you did, no one lambasted you for it yet!

"Get Thee Out, drag racer!"

Dragonitti · 11-02-2011, 05:11 PM

Quote:

Originally Posted by Sparkplug

14.5 is probably more like it. 13.6 for those stats is WAY too quick. Maybe with some crazy gearing...

I agree, 13.6 is to quick for the specs. 14.5, I can live with that still. It would be getting quicker over time anyway after the mods.

Quote:

Originally Posted by Allch Chcar

I'm surprised no one did that recently. And since you did, no one lambasted you for it yet!

"Get Thee Out, drag racer!"

It's still relevant performance #'s for the track too. Lets you know how quick on the straights you will be.

SUB-FT86 · 11-02-2011, 06:31 PM

Quote:

Originally Posted by Dragonitti

I agree, 13.6 is to quick for the specs. 14.5, I can live with that still. It would be getting quicker over time anyway after the mods.

It's still relevant performance #'s for the track too. Lets you know how quick on the straights you will be.

I think this car will do 14.7-8.

Dave-ROR · 11-02-2011, 06:51 PM

Quote:

Originally Posted by SUB-FT86

I think this car will do 14.7-8.

It shouldn't be that slow. An ITR with a good driver stock could do high 13s, so this has a little more weight, but a little more traction for launching.. I'd guess 14.3-14.5.

NESW20 · 11-02-2011, 07:31 PM

FWIW i will get better performance out of my truck's engine if i run premium. according to wikipedia i would pick up 3hp and 12lb.ft. of torque if i switched to 91. however, that's with my truck's 10:1CR. also, i don't know how much better my mileage would be. if i ever pull a trailer with my truck, it will get premium.

my FRS/BRZ will ONLY get premium.

GotBoost? · 11-02-2011, 07:46 PM

I think it could manage 13's, I took a bone stock 07 WRX at 224HP/226TQ weighing 3252lb's and ran a 13.7, the lack of TQ might be the problem though. Just need a really good launch

ryridesmotox · 11-02-2011, 07:55 PM

Quote:

Originally Posted by NESW20

FWIW i will get better performance out of my truck's engine if i run premium. according to wikipedia i would pick up 3hp and 12lb.ft. of torque if i switched to 91. however, that's with my truck's 10:1CR. also, i don't know how much better my mileage would be. if i ever pull a trailer with my truck, it will get premium.

my FRS/BRZ will ONLY get premium.

I would always be skeptical of what you read on there... the performance is based on many more things than just engine octane... you have to account for volume of air (density, pressure, temperature), compression ratio, fuel temp, fuel pressure, engine temp, cam and valve operation... and many more things. IT's not just throwing higher grade fuel in and calling it good.

Allch Chcar · 11-02-2011, 08:17 PM

Quote:

Originally Posted by ryridesmotox

I would always be skeptical of what you read on there... the performance is based on many more things than just engine octane... you have to account for volume of air (density, pressure, temperature), compression ratio, fuel temp, fuel pressure, engine temp, cam and valve operation... and many more things. IT's not just throwing higher grade fuel in and calling it good.

It's not unusual to gain power just by switching octane in a modern engine designed and built for Regular fuel. Plenty of economy cars have higher than optimal compression ratios to improve FE and are tuned to run rich or retard timing under moderate-heavy loads and will run better on Premium. The honda fit's engine for example, dinky little economy tuned engine, will take advantage of premium up to(I believe) 100 Octane. I'm not 100% if that was RON or not but I read a source material on it. Pretty neat stuff.

serialk11r · 11-02-2011, 09:59 PM

Quote:

Originally Posted by Allch Chcar

If it makes you feel any better I'm going to be paying the equivalent of $4.06 a gallon to run E85 (based on BTU content) when 93 octane is only $3.55. ;p

^This +1.

I'm surprised no one did that recently. And since you did, no one lambasted you for it yet!

"Get Thee Out, drag racer!"

Hehe but E85's high latent heat of vaporization and higher stoichiometric ratio (about 3% of its heat of combustion) gives you about 2% more free power over gasoline, and then improving ignition timing gives you a tiny bit more, so it closes the gap a tiny bit.

And WHAT 93 octane is only 3.55? In California it's like 4 bucks.

11-02-2011, 02:04 PM	#423
no_name Senior Member Join Date: Oct 2009 Drives: 2005 Hyundai Accent Location: Ottawa Ontario Posts: 306 Thanks: 27 Thanked 15 Times in 7 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Not all cars that recommend premium actually require it, but they have better performance if you do put it in. The ECU just compensates and you lose some power. I was hoping for a similar case here. Also, single folding rear seat? No 50/50? I use that to seat 3 people + stuff all the time in my car. This keeps getting worse as a DD. My old 86 was a great DD. Last edited by no_name; 11-02-2011 at 02:17 PM.

11-02-2011, 07:31 PM	#430
NESW20 2.1L 3SGTE Join Date: Oct 2009 Drives: MR2 Turbo & Tacoma Location: Columbus, IN Posts: 1,248 Thanks: 29 Thanked 24 Times in 22 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	FWIW i will get better performance out of my truck's engine if i run premium. according to wikipedia i would pick up 3hp and 12lb.ft. of torque if i switched to 91. however, that's with my truck's 10:1CR. also, i don't know how much better my mileage would be. if i ever pull a trailer with my truck, it will get premium. my FRS/BRZ will ONLY get premium. __________________ 1991 MR2 Turbo - 2.1L high compression stroker 3SGTE 2006 Tacoma 4x4 TRD Off Road - All-Pro front bumper, Old Man Emu shocks, Old Man Emu HD front coils, All-Pro leafs 1990 240SX Coupe - sold 2008 Civic Si Sedan

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11-02-2011, 02:33 PM	#424
Dragonitti Banned Join Date: Nov 2010 Drives: Boosted Scion tC, 350z Location: TN Posts: 1,779 Thanks: 0 Thanked 2 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Didn't see if anyone posted, not going back, but 1/4 mile calculators based on the 2662lbs @ 200hp should net a 14.5 ET Another calc estimated a 13.6 though.

11-02-2011, 07:46 PM	#431
GotBoost? Member Join Date: Oct 2011 Drives: 2007 OBP STI (SOLD) Location: SD Posts: 14 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I think it could manage 13's, I took a bone stock 07 WRX at 224HP/226TQ weighing 3252lb's and ran a 13.7, the lack of TQ might be the problem though. Just need a really good launch

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