I''m having an exedy twin installed with a built 2.0, 35R, cams, etc probably no more than 30psi max. I want to do the clutch at the same time to save on the install cost of the clutch but now I'm worried about the clutch break in if it will be on the dyno getting tuned right after install. I've read conflicting info that its okay since its on the dyno and but then also you should do 500miles to break in. Its going to be a mustang dyno if it matters.

 

In theory, it's not going to make that big of a difference if you replace it or not when it comes to the dyno time. You won't be doing any hardcore launches or bangin gears off the rev limiter on the dyno, so it's very unlikely that it will hurt the new clutch. Broken in or not, I can't see a new clutch slipping under a dyno pull either. If you wanted to be safe, just don't touch it until after the dyno! Hope this helps.

 

Btw, do we need a retune everytime after a new clutch change?

 

When I installed my Exedy Twin HD, I did a 500 mile break-in.

If you read the instructions that come with the clutch, it will tell you a 500 mile break-in is necessary.

Definitely do a break-in then a tune. The clutch is not supposed to see anything over 4000 RPM's for the first 500 miles. When tuning, your tuning WOT and 7000+ RPM's.

If you want the clutch to last, break it in.

P.S. - Make sure when the clutch is installed to use Loctite Red 271 on the flywheel and pressure plate bolts. http://www.loctiteproducts.com/p/t_l...er-Red-271.htm


-Bink

 

I want to save the extra $ on the clutch install but not at the price of my exedy twin's longevity. I may see if they can do a base tune to use during the 500 mile break in then head back up for the real deal.

 

on my oil turbo integra i built the engine and out a new clutch in. Then the car was dynoed with 0 miles on everything. everything worked out great.

 

Race cars don't do a clutch break in, but that's for 1 of 2 reasons. They're either running puck clutches and don't need to break it in, OR they're not concerned with longevity.

The shop should be able to do a basic tune that will get you by. While breaking in the clutch, you're not going to be beating on the car anyway.

Good luck!

No. Changing the clutch has nothing to do with tuning. The only reason the OP is wondering about tuning the car after a clutch install is because in his car, the engine is already out of the car with the transmission off, so it would make sense to do the clutch now, both financially and in terms of down time.

 

No. Changing the clutch has nothing to do with tuning. The only reason the OP is wondering about tuning the car after a clutch install is because in his car, the engine is already out of the car with the transmission off, so it would make sense to do the clutch now, both financially and in terms of down time.[/quote]


Thanks Vivid Racing.

 

Had my clutch installed, went right to the dyno - don't worry OP.