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86TOYO2k17 01-31-2020 01:43 PM

Quote:

Originally Posted by Clutch Dog (Post 3295599)
BTW this is mostly correct


the parts list i threw together is a completely reliable. clutch drop and rip everyday all day 1 hour lap sessions, no worries over built project

ive seen supercharged bolt on E85 86's dyno 300 whp and with 4.3 gears makes for a really fun time. but admittedly its just a matter of what breaks at that power level.

the real sweet spot as mentioned is about 240-260 whp. the car would do that nearly all day.

yeah, 300whp sc 4.3gear would be a blast and enough for most,

Another thing people forget when mentioning power goals, is power to weight, 200lbs weight reduction can go a long way, and also have benefits in other areas like braking and handling. As well as helping get to a level of acceleration performance that an unreliable amount of whp would need.

Cost sky rockets for same WHP if its for spirited driving, vs tracking.
and cost sky rockets from 300whp or below vs 350whp and up.

So many factors and variables to make generalized statements unless we know his specific intentions and specific budget.

Clutch Dog 01-31-2020 02:18 PM

Quote:

Originally Posted by 86TOYO2k17 (Post 3295610)
yeah, 300whp sc 4.3gear would be a blast and enough for most,

Another thing people forget when mentioning power goals, is power to weight, 200lbs weight reduction can go a long way, and also have benefits in other areas like braking and handling. As well as helping get to a level of acceleration performance that an unreliable amount of whp would need.

Cost sky rockets for same WHP if its for spirited driving, vs tracking.
and cost sky rockets from 300whp or below vs 350whp and up.

So many factors and variables to make generalized statements unless we know his specific intentions and specific budget.

didja check the TRD Giffon? ;)

stock 200 hp engine, but it laps tsukuba under a minute. that cf roof...

86TOYO2k17 01-31-2020 02:24 PM

Quote:

Originally Posted by Clutch Dog (Post 3295624)
didja check the TRD Giffon? ;)

stock 200 hp engine, but it laps tsukuba under a minute. that cf roof...

Yeah thatís crazy. I want to know how they got that weight down so much. Probably cost a lot, but still good illustration on what weight reduction can do for overall performance.

NoHaveMSG 01-31-2020 02:39 PM

Quote:

Originally Posted by Clutch Dog (Post 3295580)

then the next weakest link becomes the differential. its just a small subaru 7 inch unit. never meant to take a whole bunch of power. the best idea would be a mustang IRS rear end from the newer 2016+ as its an 8.8 ring gear and can take beef'

Our diff is Toyota/Lexus based, not Subaru. The IS250 is the exact same housing, I believe Y31, I can't recall exactly. Built FI cars are abusing them without issue.

Clutch Dog 01-31-2020 03:13 PM

Quote:

Originally Posted by NoHaveMSG (Post 3295633)
Our diff is Toyota/Lexus based, not Subaru. The IS250 is the exact same housing, I believe Y31, I can't recall exactly. Built FI cars are abusing them without issue.

thanks for clarifying. I had to double take. I was for sure it was a 7.5 diff simialr to the sti, s2000 and rx8

NoHaveMSG 01-31-2020 03:13 PM

Quote:

Originally Posted by Clutch Dog (Post 3295641)
thanks for clarifying. I had to double take. I was for sure it was a 7.5 diff simialr to the sti, s2000 and rx8

Yeah no prob. I have a spare if anyone needs one :D

86TOYO2k17 01-31-2020 03:19 PM

Quote:

Originally Posted by NoHaveMSG (Post 3295633)
Our diff is Toyota/Lexus based, not Subaru. The IS250 is the exact same housing, I believe Y31, I can't recall exactly. Built FI cars are abusing them without issue.

not sure the difference of Y31 vs Y38. but IS250 has Y31 4.1FD, Y50 is 3.909FD. brz/86 13-16 MT / 13+ AT have Y38 4.1FD , 17+ MT has Y58 4.3 FD,
IS300 has M85 3.73FD M98 3.91FD.

All share the same carrier/pumpkin and are interchangeable. no idea if any have different torque ratings or all are the same. but i dont think people have much issues with those unless your making like 300ft lbs with a slick and launching hard.

tom@ptuning 01-31-2020 03:38 PM

Quote:

Originally Posted by 86click (Post 3295574)
Willing to spend 15k on the car

That much gets you into a nice PTUNING turbo kit with flex fuel.

Shoot me a PM

Clutch Dog 01-31-2020 03:51 PM

Quote:

Originally Posted by 86TOYO2k17 (Post 3295644)
not sure the difference of Y31 vs Y38. but IS250 has Y31 4.1FD, Y50 is 3.909FD. brz/86 13-16 MT / 13+ AT have Y38 4.1FD , 17+ MT has Y58 4.3 FD,
IS300 has M85 3.73FD M98 3.91FD.

All share the same carrier/pumpkin and are interchangeable. no idea if any have different torque ratings or all are the same. but i dont think people have much issues with those unless your making like 300ft lbs with a slick and launching hard.

this would also be the small supra diff? mk3 gen not the mk4

I betcha its all the same.

NoHaveMSG 01-31-2020 04:00 PM

Quote:

Originally Posted by Clutch Dog (Post 3295661)
this would also be the small supra diff? mk3 gen not the mk4

I betcha its all the same.

Yep, the R&P's that Weir Performance was making was because he also made them for the Supra.

mrg666 02-01-2020 07:57 AM

I would start with a built short block with 10:1 (for 300whp, 12:1 is okay) compression. And, upgrade valve springs, plus an oil cooler.

Supercharger kit, high-boost pulley, port injectors, fuel pump, MAP sensor, and an E85 kit will be more than enough for 300whp.


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