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[ROOT]/includes/functions.php on line 4752: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4754: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4755: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) [phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4756: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3887) RS Motorsport :: Classic Speed Restored • View topic - 2.0lt Flywheel machining... how much??
I'm Currently building a race motor for my rally car and was wondering how much i should be machining off the flywheel to make it rev up better but still retaining some of the torque that the standard flywheel provides?
i'm only planning on taking it off the back but i'm not sure how much.. i have been looking at Des Hammill's book and he states the minimums which is good for safety but i'm not sure how much i'd need for rallying without going overboard.
My opinion on this as i have been down this road. If its a very high reving big HP engine then you should be using a steel flywheel simple as that, but of course budget may not allow such luxury, i left mine alone its about 5.5kg i tossed up taking a kilo or so off but being a road car with a couple of heavy bodies on board tourque will be lost, bad idle etc.
I got completely conficliting advice on this and the engine recon ppl did not feel comfortable taking material off the standard flywheel.
I got my bro to machine up, on his lathe, to this dimensions. [nearly free $ wise]
The rear side wobbles around a lot, so this realy needs doing from std.
I had face ground, by clutch place.
I then had engine assembly re balanced.
This has been running, for at a guess 4 plus years, to min 7200 max 8K rpms.
Engine will idle @ 700 rpms, take off is easy as road car.
The key is don't lighten more than pressure plate.
Attachments
pinto f-wheel.jpg (96.96 KiB) Viewed 19490 times
clutch-f wheel-p plate-3-00.jpg (74.28 KiB) Viewed 19490 times
rm-ebgout-11-08--03.jpg (167.14 KiB) Viewed 19490 times
Last edited by Roger Miller on Wed Feb 24, 2010 6:34 pm, edited 2 times in total.
Don't go near KCF, he's a rip off merchant. I have a flywheel template I will send to you to get a steel one made. PM me your address
Do it right first time and forget it. In pinto form my engine ran to 8300rpm, I am using the same flywheel for the YB head version @ upto 9000rpm+
Rodger is right, these things have been done before, you don't need to reinvent the wheel.
David
I would never feel safe using this one... I like my legs attached [/quote]
my father had a std (heavy)pinto flywheel let go on his rally car (aprox 6 to 7000rpm , due to
re using the same bolts , overstretched me thinks but suprisingly very little damage to inside of the
bellhousing , a bloody big loud noise but never looked like it was going to "chainsaw" its way out !!
i think its a myth , ive never ever met a stumpy leged escort driver
dont forget its gotta take the input shaft with it to even have half a chance of getting out