as above , i think the standard 4x4 flywheel is around 14kgs and the 2wd is around 7kgs what is the ideal weight to put on a 4x4 to reduce lag?
there may not be a right answer on this but i would like to hear your thoughts

 

I don't like lightened flywheels makes the car rev quick but the downside is less torque and possible rough idle. for a road car i would'nt bother dont forget if you do lighten your fly the make sure its all balanced

Taken from another forum:

The one negative of a lighter flywheel is that it makes taking off from a stop more difficult as there's less inertia. Otherwise, nothing but benefits as it 'frees' up power by reducing inertia and weight, makes rev-matching/downshifting easier as the engine revs more freely, and I'd guess that it lessens the wear on the clutch and tranny on shifts due to less inertia. BUT, it probably increases clutch wear a bit when starting from a stop as you'll need to slip the clutch a bit more.

 

well how do you think it would be with a 2wd flywheel on a 4x4 set up ? at idle it should not be rough but will maybe be a little harder to drive from a stop?
i have a pinto in the pickup atm and its flywheel is around 4kg and dont find it too bad to drive , but i do only drive it at the weekend so dont mind taking a hit on how it drives , just want to reduce lag as once cossie is in it i will be running a t34 .63 so would be nice to get rid of some lag

 

2wd fly on a 4x4 is fine. Thats what i have on mine. That said, you wont really notice the difference in the way it drives.

 

hi so do you feel it deals with lag better?

 

The flywheel will not change lag at all. All it will do is let the engine rev quicker.

Unless your using the word lag in another way other than "turbo lag"

 

yea i mean , for example the turbo comes in at 3600rpm , so if the flywheel was lighter it will build revs quicker so the rpm will get to the 3600rpm faster ,so reduces the turbo lag ?

 

no as 3600rpm is 3600rpm no matter how quickly you get there lol. The only thing it will change is how quickly the car will rev. It will not change when the turbo starts to make positive boost or the like.

 

i know it wont bring the turbo lag down ie making it come in at 3400 it will still come in at 3600 but if it gets to those rev faster it wont be as bad?

 

Just fit a maram shafted .48 and make 407bhp at 3k

 

i will be running the .63 , i am not too worried about the lag but if i could make it better with the flywheel its easy as i have a 2wd one so just a case of bolting it on

 

how many people are using / running a light flywheel ?

 

I am on my sierra 4x4 race car
here it is after machining





steve

 

very nice
so what benefits do you feel you have with this flywheel?
is it around the 3ishkgs?

 

it revs a lot cleaner and quicker, apart from that I didn't really notice alot to be honest
certainly no downsides to it
steve

 

well sounds good to me thanks

 

You must be careful fitting a very light flywheel - you may have to set the idle higher (eg 2k) to get it to tick over, it may make the car SLOWER off the line because it bogs down when you let the clutch out, and the car may slow down uphills (more than with a stock flywheel)

A lightweight flywheel will not "fix" problems with turbo-lag, best to get to the route of the problem itself

A light flywheel works better on a lightweight car (race car) the heavier the car, the heavier the flywheel needs to be

A 2wd is fine on a 4wd -an ultra light flywheel may cause problems and/ or make the car slower overall than with a heavier flywheel

 

i would try and shed weight from the p100 itself if you want it a little quicker.
despite belief, the back end of them is sodding heavy!
To reduce turbo lag, try anti lag! :L

 

i have already done this as i know the p100 is around 200kg more and still have more bits to cut out
as for the lag
if the engine can build its revs faster (ie with the help of a lighter flywheel) this means it will get to the point when the turbo comes in faster so surly this can only make it better
as for anti lag i have read up abit on it and i have seen too many cons so i dont really want to use it

 

thanks mate just what i thought , i will be using the 2wd ond the 4x4