Clutch choice and turbo torque
Hey guys
I have a 1.6 with stock clutch and t25 (sr20) my clutch is now slipping. the price of the f1 stage three is very attractive but from searching it seems to be general consensus is its fine to 200 or so whp (its rated to 210tq) and some were running it sucessfully at 250whp(?tq) but didnt state whether it was with the 1.8 flywheel. my goals are to reach 250whp so the question is: what tq numbers roughly does a t25 (2554) make at 200whp (~15psi)? what about a 2560 at 250whp? and last question is at what boost level roughly does a 2560 reach 250whp on a 1.6 with decent manifold 2.5" exhaust diypnp (stock head)? |
FMI and dont worry about the rest (need a stock 1.8L flywheel)
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I had great experiences with my F1 racing flywheel, but it's a puck clutch.
If you've never driven a puck clutch before, well, think twice and try it before jumping in headfirst. |
FM2 or 949.
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Puck clutch = hell on driveline and engine mounts. I had the FM happy meal for a couple years and it was every bit of perfect. Well worth its weight in gold. I now have the 10lb flywheel with a Competition Clutch 6-puck disc and it requires perfect engagement otherwise it will shudder horribly. The next time I have to replace the clutch, it will be with the FM clutch.
I'm hoping the Carbing trans brace I just got will help, I'll know tonight. |
I'm in love with the FMII clutch in Jeff's car. The pedal is very light, almost like my stock daily clutch, engages smoothly, holds the his weakling torque, and the light flywheel is nice. The 949 twin would be nice but is buy the OSG diff first. God I want that diff.
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Originally Posted by hustler
(Post 855718)
I'm in love with the FMII clutch in Jeff's car. The pedal is very light, almost like my stock daily clutch, engages smoothly, holds the his weakling torque, and the light flywheel is nice. The 949 twin would be nice but is buy the OSG diff first. God I want that diff.
Also you will not make 250hp at the wheel with a 1.6 and t25 off an SR20. You will be lucky to hit 225hp and about 215-225ft/lbs of torque. |
Won't the FMII last longer? As I see it, due to the light pedal, there is no reason to to lighter. Why not over-clutch if there is no compromise?
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Originally Posted by hustler
(Post 855722)
Won't the FMII last longer? As I see it, due to the light pedal, there is no reason to to lighter. Why not over-clutch if there is no compromise?
I have driven both the FMI and FMII back to back. The FMI was in a 97 with a FFS and the FMII was in my car. There is a noticeable pedal stiffness difference. While the FMII is less stiff then my old ACT that held less torque, it is still a good bit stiffer then the FMI. If you don't need the extra torque rating no reason to deal with a stiffer clutch that costs more if it is not needed. As for a difference in how long the 2 will last I have no clue. I honestly don't think that the FMII will last any longer then the FMI, but that is a complete guess. |
I'm curious about the wear aspect as well.
I'm about to buy a 'happy meal' from FM and was proceeding with Hustler's mind set of "why not over clutch". Now I'm questioning that logic since everyone seems to be running the FM1 with success. I'm running a TD04-15g at around 12-15 psi so I doubt I'll make more than 210-235 whp ... it's definitely not a need. -Zach |
You guys must be ladyboys. Jeff's FMII is so easy to push down I would not think twice about getting it for a daily driver.
Paging FM on the wear issue! Please pick-up the red courtesy phone. |
Originally Posted by hustler
(Post 855851)
You guys must be ladyboys. Jeff's FMII is so easy to push down I would not think twice about getting it for a daily driver.
Paging FM on the wear issue! Please pick-up the red courtesy phone. Make money money, spend money money. -Zach |
Originally Posted by Braineack
(Post 855684)
FMI and dont worry about the rest (need a stock 1.8L flywheel)
sad part about living in aus is we have terrible prices and to import a clutch from america costs an extra $100 so a fm1 will come to about 500-550 depending on how much I can pick up a s/h bp flywheel.
Originally Posted by shuiend
Also you will not make 250hp at the wheel with a 1.6 and t25 off an SR20. You will be lucky to hit 225hp and about 215-225ft/lbs of torque.
so next question is will a 2560 bring my car up to ~250whp or is there something im missing?
Originally Posted by Doppelgänger
Puck clutch = hell on driveline and engine mounts.
Id love a 949 twin plate but I dont have the mulah nor the need. depending on money I may up the clutch to the fm2 just to make it not a limit if my goals change in the future. Cheers guys |
Originally Posted by hustler
(Post 855722)
Won't the FMII last longer? As I see it, due to the light pedal, there is no reason to to lighter. Why not over-clutch if there is no compromise?
Maybe a dumb analgy, but that's how I've always looked at that situation for heavy duty/race parts on a street car. |
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