Stock Flywheel

fredybear · Post by **fredybear** » Sun Jun 23, 2002 3:39 am

If i use a stock flywheel and a stock pully in my 78x90.5..44s...40x35 eepco...what would b the difference if i were to use a lightened flywheel and a degree pully?...does it really make that much difference?

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Fredy-
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Post by **sparkmaster1** » Sun Jun 23, 2002 5:58 am

A stock sized degree pulley won't give you any more power. A degree "power" pulley will give you a bit of power but it takes away cooling due to the lower fan speed. A light flywheel will let your motor rev faster than a stock one. Good luck, Tim

fredybear · Post by **fredybear** » Sun Jun 23, 2002 4:11 pm

No luck yet....im looking for a horsepower difference in the lightened vs stock..is thier any and how much...i have a stock flywheel thats in good shape and i wanna know if it is worth drilling the other four holes or even lightining it or should i just buy a lightened one???

nicanor · Post by **nicanor** » Sun Jun 23, 2002 4:23 pm

A flywheel doesn't take or give HP. It just allows the engine get to a higher RPM faster (making for a faster take off). I'd recommend buying one lightened instead of modifying one yourself unless you are a machineist. You could take off in the parts wrong parts and damage it. Some people don't recommend lightened flywheels.

What size engine do you have, is this for street or race only?

[This message has been edited by nicanor (edited 06-23-2002).]

fredybear · Post by **fredybear** » Sun Jun 23, 2002 4:58 pm

78x90.5..44s...40x35 eepco...and the cam to b determined...it had a 120 and 92s in it so im changing it all for the better....the case has been bored once and i hear all the moaning about that... but its tapped ,welded and all has been done to it...plus im not gonna beat the crap out of it.... The machinist has my crank and rods for balanceing and hes waiting for the flywheel...so im gonna ask him to drill it out if its worth it..This will b a street car and i will b driving it back to cali sooner or later so im workin on all the specs before i put it together...

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Fredy-
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B6U9GMAS · Post by **B6U9GMAS** » Sun Jun 23, 2002 6:37 pm

is it true that if you get a lightened flywheel then you need to get like a heavier crankshaft pulley to balance it out? thats just what ive heard. and then some where i saw lightened flywheels that can break apart if reved over a certain rpm. kinda scary

fredybear · Post by **fredybear** » Mon Jun 24, 2002 6:25 am

to all the dyno techs...is it fine to run the stock flywheel and pully on my combo?

nicanor · Post by **nicanor** » Mon Jun 24, 2002 7:17 am

Don't they machine the flywheel thinner on certain parts and not drill out holes?

fredybear · Post by **fredybear** » Mon Jun 24, 2002 8:21 am

drill it for 8 dowels....not to lighten it....im bringin it in tomorrow....is the stock flywheel fine???

Lloyd McClelland · Post by **Lloyd McClelland** » Mon Jun 24, 2002 1:21 pm

I'm still not sure of the question.. Drag guys use extra weight for more torque off the line. On a 1776 of mine, 12 lb 8 doweled flywheel, type 1 40 IDFs reved up really fast which is nice and was harder to drive at 5 mph( stopping and starting). I put on a stock flywheel drilled for 8 dowels on the same combo and it revs up slower, slower throttle responce. As to driveability I don't know as I put it in a Type 2.... Does that help? Lloyd

Post by **Marc** » Mon Jun 24, 2002 1:33 pm

A counterweighted crank and stock-weight flywheel will be noticeably sluggish on acceleration - it's even hard on the trans synchros. On the other hand, too light of a flyheel (like the ubiquitous 12-12½ pounders) can make driving in traffic no fun at all, particularly with a big cam. I'd suggest you pick a number in between (14-15?) and have it lightened a bit. Make sure nothing gets removed from behind the friction surface and that it doesn't get cut too thin near the clutch bolts - weight removed from the perimeter has far more effect than weight near the center.

fredybear · Post by **fredybear** » Mon Jun 24, 2002 5:50 pm

Perfect.....I have an 8 doweled lightened one already but the holes were alittle funny...i also have a stock flywheel with 4 dowels so now i can have the machinist copy my old flywheel...and well do wieght specs on both...so a 14lb flywheel is just about right...13lb...13 1/2lb..any good?

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Fredy-
55 bug-
63 bug-