hey everyone i am planning on boosting this summer and need a question that ive been hearing different things about answered. i have a 94 gsr motor and im wondering wat flywheel to use. i have heard that the heavier flywheel is better for boost, but i have a type r flywheel also and i have a friend willing to sell me a slightly used exedy 8 pound flywheel. is it true that the heavier flywheel is better for boost? which flywheel should i use. thanx for the info in advance

 

8 lbs is too light in my opinion. allot of people run the stock or the type r. im runnign the act street flywheel. but you do want to go on the heavier side with boost.

Landon

 

even if im running an LS tranny? i thought maybe the light flywheel might make up for the length of the gears in that tranny

 

yea, i mean traction will be non existent on the street with an 8lb FW.

Landon

 

aight thats wat i was thinkin might be your response, so im better off gettin my itr one resurfaced and using that?

 

yea i mean if it was between the 8 lb and the ITR id say ITR for sure.

Landon

 

7 lbs and loving it ... have no problems with idling or staying in my powerband between shifts ... just rev up a little higher at the track to launch the car

 

do u drive your car on the street? bc my car will be street driven too, so im just tryin to figure out wat would be the best setup to be fast but also streetable

 

Slo, the reason that a light flywheel isn't reccomended with a turbo car is because when you clutch-out while launching the lower rotating mass won't be able to bear as much load at once like the heavier one does. The car will be more prone to bogging but changing your driving style can easily cure this. As far as traction goes, traction isn't affected in any way, shape, or form with a lighter flywheel. It simply makes the rotating assembly easier to rotate which would be harder for a lead-foot to tame, but power dosen't go up (marginally - like 1-3ft/lbs) but that's not what makes the difference in power application. The car still makes the same peak power at the same RPM, just that it takes less time to get there.

BTW, you are correct, a light flywheel will offset the LS gears wonderfully.

 

if you dont think a lighter flywheel will make traction more diffucult your crazy. with anything your going to have people who run extremes and do fine with them. in general a super light flywheel is not practicle in a street driven vehicle.

Landon

 

It's really not important enough to argue it with you, but FYI: light flywheels are not advised for street cars because taking off from dead stops and in traffic will cause far more frequent bogs and stalls. Gas mileage may take a crap as well due to having to rev higher to avoid bogging. Try it with an unsprung-hubbed clutch and your streetability goes to zero. This has absolutely zilch to do with traction because, once again, power dosen't change at all, so your wheelspin is only a product of your driving and inability to change it.

 

are you guys talking from experience???
... I run a 7 lb flyweel with a 6 puck AI4-XTR6 extreme Act clutch (rated at 409 flt/lb torque) and have absolutely no problems driving it on the street as a daily driver...

-- I have 0 problems shifting , getting in an out of traffic , launching the car ... ect..

People really exaggerate the difficulty of the running a light flywheel or a puck clutch as a daily driver ....

Stop blaming traction problems on the lightened flywheel .. thats akin to blaming traction problems on too much torque... If you have problems with traction because you accelerate too quickly then fix it the right way ....motor mounts , bfgs, wider tires , traction bars , suspension work ... ect...

The Only problem I have with a 7 lbs is keeping the car from reving up to 9500 rpm too quickly ...

 

aight thanx everyone for the info. im not quite sure wat to do yet. i might just get the 8 lbs and try it out. or i might just get the itr resurfaced. well thanx again for all the info

 

Sorry, I had this BS 5 posts/day limit.

Dasher, I don't know if you're speaking to me in your statement:

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">are you guys talking from experience???</TD></TR></TABLE>

But yes, I am speaking from experience. Not to mention that your entire post supports my statements of:

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">The car will be more prone to bogging but changing your driving style can easily cure this.</TD></TR></TABLE>
and
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">This has absolutely zilch to do with traction because, once again, power dosen't change at all, so your wheelspin is only a product of your driving and inability to change it. </TD></TR></TABLE>

In your case, it sounds like you slip the clutch more vs. the stocker.

Slo, I don't think you'll see a drastic difference between the ITR and an even lighter flywheel unless you had another car next to you that had which ever of the two that you don't. If you already have the ITR flywheel, make use of it. Changes with an even lighter one won't be very noticable.