Revving to 7200

**KingStromba** · 15-02-2005, 01:04

How bad for the willy engine?

**GakisClio16v** · 15-02-2005, 01:08

It's ok!

With good re maping, you dont have any problem.

**Winston** · 15-02-2005, 01:09

With a steel crank yes, other wise no, the crack wasn't designed to rev

but ballcrushers loved it

**GakisClio16v** · 15-02-2005, 01:12

Afriend of mine has rev limit 8200 now and we are going dor 9500rpm!

With 8200rpm rev limit, one year now, we dont have any problem.

**Winston** · 15-02-2005, 01:17

8200 On a 2.0L willy engine

Must be modded to run that crazy rpm?, Maxi rally cars used to run 8500 and they had uprated everything.

**KingStromba** · 15-02-2005, 01:29

Whats the limit on a standard crank then?

**GakisClio16v** · 15-02-2005, 01:32

Of course we hace balanced the crank before at 10.000 rpm.

I think for a std crank, 7500 is fine...

**KingStromba** · 15-02-2005, 01:32

My crank has been balanced.

**cliokongen** · 17-02-2005, 20:24

Problem is not the crank...
Crank is fine.
Problem will be piston speed and the mass you are trying to move.

Piston speed of F7P @ 8200 = 22,7 m/s
Piston speed af F7R @ 7500 = 23,3 m/s

Piston speed of F7R @ 8500 = 25,4 m/s
Which is quite a lot whith the amount of mass being thrown around.

Hope my calculations are right. Did them a long time ago when bored!

Michael

**KingStromba** · 17-02-2005, 20:38

So what is it at 7200 on an F7R?

Is 25.4 m/s too fast?

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