I will soon be doing a d15b or z6 swap along with a clutch and flywheel. I'm looking at the ACT flywheels. The prolite is 8.4 pounds while the streetlite is 11.9. Is 8.4 too light? Will there be idle issues or anything like that? Haven't yet decided weather or not to build N/A or turbo. Which would suit me best?

 

Well 11.9 would be as light as I would go on the street. What you should probably do is forget about the flywheel and concentrate more on the build itself.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RangerDan &raquo;</TD></TR><TR><TD CLASS="quote">Well 11.9 would be as light as I would go on the street.</TD></TR></TABLE>

Would it cause me to accidently spin my tires on occasion? Should I buy a cam or something like that instead?

 

i have no experience using the prolite flywheel, however, i have talked to many people who use them and say they are still very streetable.

 

i recently bought a lightened flywheel, ive heard all sorst of input on whats too light and whats not. i have numerous friends who have had 9lbs or 8lbs flywheels and LOVED them, ive driven their cars, granted they were not all hondas, but nonetheless no problems and worked great.

when i get my 8lbs flywheel in ill be sure to leave feedback, it should be in the car in about 2 weeks.

all of my friends running 9lbs or less had turbo, my car will be running a massive turbo with a super stiff clutch.

couple of the cars
02 vw gti with k04 upgrade
95 dx with turbo kit
98 ex with b16 and greddy turbo kit
98 m3 with custom turbo

all of those cars i have driven and i didnt think the light flywheel was bad, the m3 was a bit tricky but thats b/c it had ALOT of power. the vw had the lightest flywheel at 8lbs even the dx had a 9lbs while the other two were in between 8lbs and 9lbs.

 

i have a 9.5lb flywheel on my b16a. it feels just like my stock. only problem i have with it is going up a hill from a stop and go

 

I had a 7.5 lb Fidanza (I think that's what it weighed). I've heard tons of people say 'don't go lighter than 11 lbs, it's not streetable, blah blah'. Quite frankly I think they're just pussies because I had absolutely no problem with a 7.5 lb on my daily driver.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by komat &raquo;</TD></TR><TR><TD CLASS="quote">i have a 9.5lb flywheel on my b16a. it feels just like my stock. </TD></TR></TABLE>

Numero uno reason not to buy one.

Yes I have ran them in the past...yea Im running one with my kswap. Did I ever feel a difference? Not enough imo.

Oh yeah btw the shop that put the k motor in threw the flywheel and a couple other things in on a sponsorship deal.

I dont want to ruffle any feathers here but figure what your end goals are and research the best way of getting the thing done.

 

I got the prolite on my D15b with no problem. Im even boosting with it, its nice my friend also just got one as well after I let him test drive my car the other day. You wont have any problems with it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EK-TSOHCV-TechRider &raquo;</TD></TR><TR><TD CLASS="quote">I got the prolite on my D15b with no problem. Im even boosting with it, its nice my friend also just got one as well after I let him test drive my car the other day. You wont have any problems with it. </TD></TR></TABLE>

haha..Dude I was just doing some research using my favorite tool the search button and I just saved (3 minutes ago) your torque chart under my favorites....weird.

Besides revving quickly and losing revs quickly what benefits do you feel your getting from the a light flywheel? THeres no gain in horsepower and with really no power to begin with whats really increased?

Sure if EVENTUALLY this guy goes turbo he may find a use but Im not so sure if its not a waste of time at this point.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RangerDan &raquo;</TD></TR><TR><TD CLASS="quote">haha..Dude I was just doing some research using my favorite tool the search button and I just saved (3 minutes ago) your torque chart under my favorites....weird.

Besides revving quickly and losing revs quickly what benefits do you feel your getting from the a light flywheel? THeres no gain in horsepower and with really no power to begin with whats really increased?

Sure if EVENTUALLY this guy goes turbo he may find a use but Im not so sure if its not a waste of time at this point.</TD></TR></TABLE>

Yes there is no HP gain but like you said you do get your tach to move a bit faster. Who really know how fast though? You might be able to find out by doing some dyno runs. Also I really disagry with many on that a lightweight flywheel will drop your revs faster. For example you have a stock flywheel or a 8.9 flywheel going at it 7k rpm which one do you think will loose rev faster the heavier one or the lighter one? I would think the heavier one will loose rpms much faster for the fact thats its much heavier. But thats just me maybe Im wrong on it.

 

No, it's the whole inertia thing I'm pretty sure. More moving mass takes longer to slow down. What is easier to slow down, a dump truck with a full load going 100mph, or a volkswagen beetle going 100mph. It speeds up faster because of its weight, and slows down faster because of its weight.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EK-TSOHCV-TechRider &raquo;</TD></TR><TR><TD CLASS="quote">

Yes there is no HP gain but like you said you do get your tach to move a bit faster. Who really know how fast though? You might be able to find out by doing some dyno runs. Also I really disagry with many on that a lightweight flywheel will drop your revs faster. For example you have a stock flywheel or a 8.9 flywheel going at it 7k rpm which one do you think will loose rev faster the heavier one or the lighter one? I would think the heavier one will loose rpms much faster for the fact thats its much heavier. But thats just me maybe Im wrong on it.</TD></TR></TABLE>

Well the fact that it revs faster because of the weight is the same reason it losses revs faster. The heavier flywheel carries more momentum thus is slower to rev and slower to lose revs. Now getting the revs up faster is a good thing and who cares about the revs dropping faster lol unless you suck at driving....

Fot the younger drivers (no offense younger drivers) some may have problems with stalling the car occasionally, again no big deal. Its just that now were back to the "why?"

BTW on the torque specs for a 4th gen d series motor I understan are 22 then 49. Is there an order to this?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EK-TSOHCV-TaKRider &raquo;</TD></TR><TR><TD CLASS="quote">Also I really disagry with many on that a lightweight flywheel will drop your revs faster.</TD></TR></TABLE>

Um, it does. My GSR would 'catch' itself because the revs dropped so quickly; it would fall a bit past idle a blip up. The revs are WAY quicker than stock (if you sit and drive rev the car).

 

I had an 11lb and went to a 7.5 fidenza and LOVE IT.
Street,strip, anywhere its great.
People that say its not streetable are just bad drivers and should be ignored.

 

quick revs make a world of difference. even if hp does not change.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PinkMaggit &raquo;</TD></TR><TR><TD CLASS="quote">quick revs make a world of difference. even if hp does not change.</TD></TR></TABLE>

How exactly so?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RangerDan &raquo;</TD></TR><TR><TD CLASS="quote">Now getting the revs up faster is a good thing and who cares about the revs dropping faster lol unless you suck at driving.</TD></TR></TABLE>

While a quicker revving engine is always better, i think that a light weight flywheel without the appropriate matched closer gear ratios to keep the RPM's falling out of the better part of power band would negate any performance benefit of adding the flywheel in the 1st place.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RangerDan &raquo;</TD></TR><TR><TD CLASS="quote">There's no gain in horsepower and with really no power to begin with whats really increased?</TD></TR></TABLE>

It wont add horse power, but like light weight wheels, light weight under drive pulleys and crank pulleys they free up power due to lowering parasitic drag.

This is just my opinion on the situation, so please don't get all offended if i disagree with you somewhat.

Even though one has only added the light weight flywheel there are other benefits that one may not think of. You can extend the life of your drive train because of less rotation mass and fuel savings over time can be realized also.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Huggy Bear &raquo;</TD></TR><TR><TD CLASS="quote">
This is just my opinion on the situation, so please don't get all offended if i disagree with you somewhat.
</TD></TR></TABLE>

Offended? Hell no...annoyed sometimes. j/p

My final point is this....Light flywheels have a purpose, yes. On an engine that has up to 100whp, doubtful.

Sure it may seem peppier but in reality you just wasted good money that could be used to do something a little more substantial. Btw rotational mass say at the hubs either larger rotors or a heavier wheel does effect whp. Horsepower t.v. lost 13 whp on a project Integra by putting a larger brake system on.

Light weight flywheels dont. lol building a car is like burning money anyways so in the end who cares?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RangerDan &raquo;</TD></TR><TR><TD CLASS="quote">

lol building a car is like burning money anyways so in the end who cares? </TD></TR></TABLE>

ohhh SOOO true. my buildup has been a major pain and i went WAY over my budget.

i know the flywheel does not give horespower but i was told it would help the longevity of my tranny, most cars ive seen runnin high boost or high hp have a STRONG clutch and lightened flywheel, besides my stock one is soooo dam heavy.

was i misinformed or will it help me? huggy bear's response made a ton of sense and thats the feedback i was getting on it.

 

heavy flywheels take more power out to spin.. their slower to get up there.. but stay up there longer...

light flywheels will rev up really quick.. but lose the speed just as easily...

think of flywheels as mario kart... uve got the light ones like toad, and the heavy ones like bowser... toad will beat bowser acceling and braking, but bowser will hold his speed better..

if that all makes sense

sure theres no HP gains, but theres definately performance gains

 

i have 7 pound flywheel with a 4 puck in my eg with a d15b supercharged daily driver and i dont have any problems with it besides that when i get on it i half to watch my rpms cause it go's to 9 grand hella fast

 

wtf u take your d15b to 9k??

isnt the red line 7200?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RTE117 &raquo;</TD></TR><TR><TD CLASS="quote">I had a 7.5 lb Fidanza (I think that's what it weighed). I've heard tons of people say 'don't go lighter than 11 lbs, it's not streetable, blah blah'. Quite frankly I think they're just pussies because I had absolutely no problem with a 7.5 lb on my daily driver. </TD></TR></TABLE>

Same! I have heard people talking crap everywhere about not going too light on the flywheel, you won't be able to drive it, etc.... Well I got the lightest flywheel I could find, the fidanza aluminium one. And as you say, absolutley no problems at all. Drive it everyday to work, feels great.

 

Everybody's responses have been great. Very infomative and very helpful. Keep 'em coming.