Max power for factory drivetrain and engine internals - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

solidONE · 09-14-2013, 09:01 PM

What would you guys say is the max amount of power the factory drivetrain and engine block will hold reliably on a street machine that sees track time often? I'm talking stock engine internals with upgraded cooling and fueling only, reliable pump gas fuel and ignition tune. Supercharged or turbo charged boost. And maybe a clutch, all else factory components.

Muskokan · 09-14-2013, 09:22 PM

Tranny is "medium" torque rated... I would think you'd start having problems around 300-350 whp. But that's just my ballpark idea from a couple threads on here.

SmsAlSuwaidi · 09-14-2013, 09:46 PM

Nobody knows any hard facts but I'll throw my opinion

A properly tuned motor could run on e85 with 500whp or so

A gearbox won't last long over 300tq ( with my driving style such as flat hard ass shifting daily )

The diff with an upgraded CF shaft only would last some time if you don't launch it with stickey ass slicks

Clutch would start bitching over 270~

Fuel system at 300 ?

Everything I stated is just me assuming stuff.

FT_Monk · 09-14-2013, 09:57 PM

200 hp...

solidONE · 09-14-2013, 10:40 PM

Quote:

Originally Posted by FT_Monk

200 hp...

K ttks bye

regal · 09-14-2013, 10:41 PM

Quote:

Originally Posted by FT_Monk

200 hp...

The oil pump has a variable gear to save gas. In the torque dip its actually designed for lower pressure rate of increase than the typical 10 psi per 1k rpm. So add a bunch of torque in that rpm range with boost ? Weird things like this are just now being uncovered and dealt with.

If you really drive the car (more than a few daily WOT pulls on the highway) follow Dezoris's build videos, it is a very smart approach, I think he is around 220 rwhp.

solidONE · 09-14-2013, 10:49 PM

Quote:

Originally Posted by SmsAlSuwaidi

Nobody knows any hard facts but I'll throw my opinion

A properly tuned motor could run on e85 with 500whp or so

A gearbox won't last long over 300tq ( with my driving style such as flat hard ass shifting daily )

The diff with an upgraded CF shaft only would last some time if you don't launch it with stickey ass slicks

Clutch would start bitching over 270~

Fuel system at 300 ?

Everything I stated is just me assuming stuff.

Fuel and clutch will be accounted for with up rated/upgraded pieces as with the engine cooling systems oil and coolant. Only thing you cannot touch is the engine block and trans/diff hard parts.

I realize that guys have gone way over 400WHP with the factory engine with boost and E85 tunes, but the reliability and longevity of this type of setup is questionable especially under the rigors of track time. For this hypothetical situation I'm only concerned with boost and pump gas. No E85, no alcohol/meth injection, no race fuel, just pump gas.

solidONE · 09-14-2013, 10:56 PM

Quote:

Originally Posted by regal

The oil pump has a variable gear to save gas. In the torque dip its actually designed for lower pressure rate of increase than the typical 10 psi per 1k rpm. So add a bunch of torque in that rpm range with boost ? Weird things like this are just now being uncovered and dealt with.

If you really drive the car (more than a few daily WOT pulls on the highway) follow Dezoris's build videos, it is a very smart approach, I think he is around 220 rwhp.

Yes I've read about and seen his set up. Very high quality and well thought out, but also very "safe." A little too conservative for my taste. This car can handle more abuse than that. His is more of a "trackable street tune" I looking for something closer to a "streetable track tune" than that, but something more livable and reliable than a full on track setup with functioning lights.

scraejtp · 09-14-2013, 11:07 PM

Quote:

Originally Posted by solidONE

Fuel and clutch will be accounted for with up rated/upgraded pieces as with the engine cooling systems oil and coolant. Only thing you cannot touch is the engine block and trans/diff hard parts.

I realize that guys have gone way over 400WHP with the factory engine with boost and E85 tunes, but the reliability and longevity of this type of setup is questionable especially under the rigors of track time. For this hypothetical situation I'm only concerned with boost and pump gas. No E85, no alcohol/meth injection, no race fuel, just pump gas.

Then I wouldn't see much concern. You aren't going to make much more than 300-350 whp with pump gas anyways. Without slicks I wouldn't expect much issue.

lexusb3 · 09-14-2013, 11:09 PM

I have been trying to push the car more and more the stock tranny is still on my car and I'm abusing 400whp++ daily and redline daily 16,500 miles been boosted since a week after purchase of the car

internals hold well! So far

phloozy · 09-14-2013, 11:11 PM

Quote:

Originally Posted by lexusb3

I have been trying to push the car more and more the stock tranny is still on my car and I'm abusing 400whp++ daily and redline daily 16,500 miles been boosted since a week after purchase of the car

internals hold well! So far

With great balls comes great cars

Rayme · 09-14-2013, 11:54 PM

Quote:

Originally Posted by regal

The oil pump has a variable gear to save gas. In the torque dip its actually designed for lower pressure rate of increase than the typical 10 psi per 1k rpm. So add a bunch of torque in that rpm range with boost ? Weird things like this are just now being uncovered and dealt with.

If you really drive the car (more than a few daily WOT pulls on the highway) follow Dezoris's build videos, it is a very smart approach, I think he is around 220 rwhp.

Can you elaborate on that oil pump "issue" ? I never heard of anything like this.

regal · 09-15-2013, 12:06 AM

Quote:

Originally Posted by lexusb3

I have been trying to push the car more and more the stock tranny is still on my car and I'm abusing 400whp++ daily and redline daily 16,500 miles been boosted since a week after purchase of the car

internals hold well! So far

You aren't going to test the car fully in florida, its flat with nothing but miles of straight roads. Take her up for a trip to the appalacians and find some backroads, fun stuff.

Quote:

Originally Posted by Rayme

Can you elaborate on that oil pump "issue" ? I never heard of anything like this.

http://www.ae86drivingclub.com.au/fo...OOOOOM!http://

Its post #3

Raven604 · 09-15-2013, 12:58 AM

Quote:

Originally Posted by regal

You aren't going to test the car fully in florida, its flat with nothing but miles of straight roads. Take her up for a trip to the appalacians and find some backroads, fun stuff.

http://www.ae86drivingclub.com.au/fo...OOOOOM!http://

Its post #3

First I've heard of this... Interesting

Sent from my SGH-I337M using Tapatalk 4

09-14-2013, 09:01 PM	#1
solidONE Senior Member Join Date: Dec 2012 Drives: FR-S Whiteout Location: California Posts: 2,863 Thanks: 1,808 Thanked 790 Times in 611 Posts Mentioned: 42 Post(s) Tagged: 0 Thread(s)	Max power for factory drivetrain and engine internals What would you guys say is the max amount of power the factory drivetrain and engine block will hold reliably on a street machine that sees track time often? I'm talking stock engine internals with upgraded cooling and fueling only, reliable pump gas fuel and ignition tune. Supercharged or turbo charged boost. And maybe a clutch, all else factory components. __________________ Intent > Content cowardice is the mother of cruelty.

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09-14-2013, 09:22 PM	#2
Muskokan Senior Member Join Date: Aug 2013 Drives: white Sport-tech Location: Ontario Posts: 676 Thanks: 204 Thanked 320 Times in 149 Posts Mentioned: 2 Post(s) Tagged: 1 Thread(s)	Tranny is "medium" torque rated... I would think you'd start having problems around 300-350 whp. But that's just my ballpark idea from a couple threads on here.

09-14-2013, 09:46 PM	#3
SmsAlSuwaidi Boosted Join Date: Feb 2013 Drives: Not a supra....yet Location: Riverside,CA/ Abu Dhabi,UAE Posts: 2,925 Thanks: 487 Thanked 1,203 Times in 812 Posts Mentioned: 90 Post(s) Tagged: 2 Thread(s)	Nobody knows any hard facts but I'll throw my opinion A properly tuned motor could run on e85 with 500whp or so A gearbox won't last long over 300tq ( with my driving style such as flat hard ass shifting daily ) The diff with an upgraded CF shaft only would last some time if you don't launch it with stickey ass slicks Clutch would start bitching over 270~ Fuel system at 300 ? Everything I stated is just me assuming stuff. __________________ https://www.facebook.com/Smsalsuwaidiracing/

09-14-2013, 09:57 PM	#4
FT_Monk Member Join Date: May 2012 Drives: Over the hill WRX Location: Socal Posts: 67 Thanks: 0 Thanked 10 Times in 9 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	200 hp...

09-14-2013, 11:09 PM	#10
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 have been trying to push the car more and more the stock tranny is still on my car and I'm abusing 400whp++ daily and redline daily 16,500 miles been boosted since a week after purchase of the car internals hold well! So far

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