Highest HP on stock motor using only 93/94 octane? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

hmong337 · 09-07-2013, 11:34 PM

I generally don't care for E85 as I can't get it. But I do have access to 94 octane which is readily available where I live.

I'm curious to know how far the stock internals on pumpgas 93/94 have been pushed with forced induction.

It's looks as though FullBlown holds the record on stock internals but they did it on E85. I wonder if ~400whp is possible on straight 93/94 (obviously with all supporting mods). Also, is there a record holder for most power stock internals on regular pumpgas?

Thanks.

sw20kosh · 09-08-2013, 12:59 AM

The problem becomes knock threshold not engine internals.

On pump fuel you will run into a ceiling where you can increase the boost but you must decrease the ignition timing to compensate for knock. At this point there would be no benefit to running more boost.

This ceiling is different for every kit. A big turbo will produce the best peak whp as it doesn't have to run crazy high boost to do it. I have seen several Full Blown kits running 300-330 on pump. Looks like ptuning's GT3076r is running about the same on pump fuel (and more power with meth injection).

I will say that it is too simplified an approach to say "I want the highest HP kit". There are many other factors to consider like spool, daily driveability, mounting locations, turbo used and what application you want it for.

hmong337 · 09-08-2013, 01:09 AM

Quote:

Originally Posted by sw20kosh

The problem becomes knock threshold not engine internals.

On pump fuel you will run into a ceiling where you can increase the boost but you must decrease the ignition timing to compensate for knock. At this point there would be no benefit to running more boost.

This ceiling is different for every kit. A big turbo will produce the best peak whp as it doesn't have to run crazy high boost to do it. I have seen several Full Blown kits running 300-330 on pump. Looks like ptuning's GT3076r is running about the same on pump fuel (and more power with meth injection).

I will say that it is too simplified an approach to say "I want the highest HP kit". There are many other factors to consider like spool, daily driveability, mounting locations, turbo used and what application you want it for.

So it's a pretty sure bet to say that the pumpgas limits on the stock motor is in the low 300whp range?

I'd just like to get an idea of what can be achieved without having to rip apart the motor to swap in some lower compression pistons.

Cool SN btw...

Sonolin · 09-08-2013, 01:14 AM

Quote:

Originally Posted by hmong337

So it's a pretty sure bet to say that the pumpgas limits on the stock motor is in the low 300whp range?

I'd just like to get an idea of what can be achieved without having to rip apart the motor to swap in some lower compression pistons.

Cool SN btw...

That's definitely what it seems like. I've seen some do 350 whp on pump, I believe ptuining as well as full blown. But I wouldn't go past ~300whp on pump personally, without lower compression. I bet its doable if you have a good tuner & reliable gas though.

EDIT: Honestly I think the sweet spot for the 86 is 280-320whp which should be doable on pump with most turbo kits. I've also seen a vortech get 300 on fa20club dyno with their header + smaller pulley.

nix · 09-08-2013, 04:14 AM

I agree 280-320 whp is a great power range.

@sw20kosh & @Sonolin comments are good.

It depends what you do with the car but I have a great tuner and on 98 ron we personally feel 300+ is pushing it.

jamesm · 09-08-2013, 11:39 AM

I have 280ish now and I'm already needing more. Just get a turbo so you can up the boost a few times as it gets boring, extend the excitement as long as possible lol.

Hawaiian · 09-08-2013, 02:01 PM

I've seen the P&L kit dyno at 320 on pump

dabocx · 09-08-2013, 03:07 PM

300-320whp is the highest ive seen on pump. Ive seen higher on meth+93 if you want to go that route.

lexusb3 · 09-08-2013, 04:15 PM

i made 337 on pump

lexusb3 · 09-08-2013, 04:15 PM

it was fun untill i got bored and went e85 and then 16 lol

AVOturboworld · 09-08-2013, 04:16 PM

On our kit, we've 300~320 on pump 92 (10% ethanol). With a pure 93/94, we could push it a bit further. But realistically, if you are planning to run pump gas, you'd give yourself a bit of margin to not only deal with possible gas issues in your area, but in case you go to areas that only have 92 or 91 octane.

King Tut · 09-09-2013, 10:53 AM

330 to 340 whp is about the limit on 93 octane. Pretty much any turbo kit can hit over 300 whp on 93 octane.

09-07-2013, 11:34 PM	#1
hmong337 Emperor JDM Join Date: Jun 2013 Drives: '91 MR2 Gen3 3SGTE, '13 FRS Location: Onterrible, Canada Posts: 1,750 Thanks: 3,498 Thanked 909 Times in 495 Posts Mentioned: 20 Post(s) Tagged: 3 Thread(s)	Highest HP on stock motor using only 93/94 octane? I generally don't care for E85 as I can't get it. But I do have access to 94 octane which is readily available where I live. I'm curious to know how far the stock internals on pumpgas 93/94 have been pushed with forced induction. It's looks as though FullBlown holds the record on stock internals but they did it on E85. I wonder if ~400whp is possible on straight 93/94 (obviously with all supporting mods). Also, is there a record holder for most power stock internals on regular pumpgas? Thanks. __________________

09-08-2013, 12:59 AM	#2
sw20kosh Senior Member Join Date: Jul 2012 Drives: 2013 Black FR-S Location: SF Posts: 3,030 Thanks: 881 Thanked 2,014 Times in 990 Posts Mentioned: 153 Post(s) Tagged: 1 Thread(s)	The problem becomes knock threshold not engine internals. On pump fuel you will run into a ceiling where you can increase the boost but you must decrease the ignition timing to compensate for knock. At this point there would be no benefit to running more boost. This ceiling is different for every kit. A big turbo will produce the best peak whp as it doesn't have to run crazy high boost to do it. I have seen several Full Blown kits running 300-330 on pump. Looks like ptuning's GT3076r is running about the same on pump fuel (and more power with meth injection). I will say that it is too simplified an approach to say "I want the highest HP kit". There are many other factors to consider like spool, daily driveability, mounting locations, turbo used and what application you want it for. __________________ 86DRIVE Challenge

09-08-2013, 02:01 PM	#7
Hawaiian That guy Join Date: Feb 2012 Drives: Ultramarine mt FR-S Location: chicago Posts: 2,370 Thanks: 692 Thanked 1,389 Times in 730 Posts Mentioned: 71 Post(s) Tagged: 0 Thread(s)	I've seen the P&L kit dyno at 320 on pump __________________ Ultramarine mt FR-S P&L stage 1 turbo Prime Motoring Flex fuel Jr Tuned 506whp @17psi (e73)

09-09-2013, 10:53 AM	#12
King Tut NASA SpecE30 Racer Join Date: May 2012 Drives: 2006 Honda S2000 Location: Gulf Breeze, FL Posts: 7,279 Thanks: 607 Thanked 5,759 Times in 3,055 Posts Mentioned: 274 Post(s) Tagged: 10 Thread(s)	330 to 340 whp is about the limit on 93 octane. Pretty much any turbo kit can hit over 300 whp on 93 octane. __________________ - King Tut Street/Track Car: 2006 Honda S2000 TT3 \|\| Race Car: 1987 BMW 325is SpecE30 \|\| Tow Vehicle: 2014 RAM 1500 EcoDiesel Sold Cars: 2012 BMW M3 \|\| 2013 Subaru BRZ \|\| 2012 Porsche Cayman R \|\| 2009 Chevrolet Z06 \|\| 2009 BMW M3 \|\| 2004 BMW M3 \|\| 2004 Nissan 350Z

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09-08-2013, 11:39 AM	#6
jamesm Banned Join Date: Mar 2013 Drives: 2013 FR-S Location: Orlando, FL Posts: 2,929 Thanks: 1,166 Thanked 2,293 Times in 1,180 Posts Mentioned: 313 Post(s) Tagged: 4 Thread(s)	I have 280ish now and I'm already needing more. Just get a turbo so you can up the boost a few times as it gets boring, extend the excitement as long as possible lol.

09-08-2013, 03:07 PM	#8
dabocx Senior Member Join Date: Jan 2012 Drives: Scion FRS Location: United States Posts: 1,267 Thanks: 564 Thanked 261 Times in 191 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	300-320whp is the highest ive seen on pump. Ive seen higher on meth+93 if you want to go that route.

09-08-2013, 04:15 PM	#9
lexusb3 Banned Join Date: Feb 2013 Drives: FRS Location: florida Posts: 1,478 Thanks: 736 Thanked 570 Times in 434 Posts Mentioned: 110 Post(s) Tagged: 1 Thread(s)	i made 337 on pump

09-08-2013, 04:16 PM	#11
AVOturboworld Join Date: Jan 2012 Drives: 2013 "AVO Orange" FR-S Location: Seattle, WA Posts: 1,067 Thanks: 69 Thanked 2,277 Times in 636 Posts Mentioned: 108 Post(s) Tagged: 2 Thread(s)	On our kit, we've 300~320 on pump 92 (10% ethanol). With a pure 93/94, we could push it a bit further. But realistically, if you are planning to run pump gas, you'd give yourself a bit of margin to not only deal with possible gas issues in your area, but in case you go to areas that only have 92 or 91 octane.

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