Lightened flywheel question...
 

YES I DID SEARCH BEFORE POSTING - BUT NOTHING WAS EXACTLY WHAT I WAS LOOKING FOR.

I have just about everything I need for the new motor combo in my eg hatch.

early B16/cable tranny with avid adapter
obx ss manifold
300z 60/63 turbo
hks 40mm wastegate - knock off 8psi spring
ebay bov
450 dsm/resistor box
adjustable cam gears
p28 - still to be chipped
no ac
no power steering
underdrive crank pulley
lightened alternator pulley
test pipe - no cat

I still need to buy an intercooler and get some shifter linkage but I am getting close. My actual question is will a lightened flywheel help with the lag I am assuming this set-up will have? Is there such a thing as going too light? I was thinking of something in the 8-9 pouind range. I vaguely seem to remember reading somewhere that lightened flywheels are not ideal with a turbo? Is this true?
Pierre

Re: Lightened flywheel question...
 

no one is going to have the same answer, but i personaly dont think one will help with lag other then getting you to the sweet spot a little sooner

if your shooting for big power your gonna have to deal with lag, fact of life, but a LW flywheel can help you cope a bit by gettin ya there faster

i personaly love them and will be getting another soon as im rebuilding my motor anyway

Re: Lightened flywheel question...
 

i think something about 12-13 pounds is ideal. like the flywheel from a integra type r.

Re: Lightened flywheel question...
 

I have the exedy 9 lb wheel in my car and it works well. If you are going to get a lightened FW I would recommend against a aluminum/steel job. Get a all stainless steel one. As for "is it better" the one thing to keep in mind is that, yes, your motor will spin up faster but you are making less spinning mass so it will spin down faster as well. If you like to shift quick all the time (i.e. on the street as well as the strip) you will like the lighter wheel. The only realy disadvanage to the light whell is that when your motor spins down quicker, so will your turbo. I have a slightly smaller turbine on my car so it doesn't affect it much. Yours is a little bigger, so it will make a little more effect. It will make slightly more top end power with the lighter wheel but you will give up a little bit of torque on the bottom.

Re: Lightened flywheel question...
 

you must not be to profficient with the search button. this has been discuss time and time again and your question answered.

https://www.homemadeturbo.com/forum/...?topic=60093.0

READ

Re: Lightened flywheel question...
 

nothing is wrong with aluminum flywheels, but chromemoly ones tend to warp like bastards.

Re: Lightened flywheel question...
 

lol you have it sooo backwards there,

-cromoly flywheel are the strongest you can buy(my jun flywheel is cromo)
- aluminum flywheels alwasys tend to warp

the only downside to cromo is that its so strong that it may cause tooth damage on those cheap ass starters because the starter teeth are soft and the flywheels teeth are so hard.

Re: Lightened flywheel question...
 

10 lb chrome molly... Love it!!!

Re: Lightened flywheel question...
 

i think mine is an 11lb....it might be 12....its an ACT and so far, i love it...the car is untuned, but it still rips!!

Re: Lightened flywheel question...
 

light flywheels are no good for boosted cars, not enought enurshia

Re: Lightened flywheel question...
 

kinetic muther focker!

Re: Lightened flywheel question...
 

270 ft pounds of tq at 4500 rpms motha fucka'..... I shift fast enough to where i dontloose boost for ----. Even with the f series tranny;s longer gears, I rip through them, even in the heavy cd5.

inertia, ------- less rotating mass= through the gears quicker. Period.

Re: Lightened flywheel question...
 

I used a 8 lbs fidanza aluminum one for 3 years with no problem in spool up time or rpms dropping off fast, I love it until I fried my clutch and the clutch took the flywheel with it, the chunks that came off the clutch scarred up the aluminum parts of the flywheel, it has replaceable friction surface so its resusable but it might be warped also new factory clutch slips like hell.
ALUMINUM SUCKS!
so I ordered an Exedy 9 llbs chromoly

Re: Lightened flywheel question...
 

THUMBUP

Re: Lightened flywheel question...
 

what f/w is best for a laggy set up between my 14b turbo, small 1.5 engine, huge intercooler, and big manifold ports i have lots of lag. how many lbs is considered light, medium, heavy

Re: Lightened flywheel question...
 

Why noit get asn intercooler applicable for your setup, id try some smaller chargepipe tubing on the hot side as well.... you can also help your turbo spool quicker by keeping latent heat in the manifold...i.e ceramic coating your manifold, these things in addition to making sure you have NO exhuast leaks will help cut down spool time..,. Just the ceramic coating cut mine down 3-500rpms..... Oh ya what size dp/exhuast???? that can affect spool too.

Just fyi, not flaming

Re: Lightened flywheel question...
 

just stop theres too many people in here giving false info and the thread is plauged with bullshit! how the ---- is a 14b laggy? i don't think so; thats a tiny ass testical size turbo. ditch the huge intercooler because all you need is a cca 6" fmic. thats probably the problem

Re: Lightened flywheel question...
 

my cp/dp/exhuast is all 2.5'' one rez and a blitz muffler. my inter cooler is 22'' X 9'' X 3'' core. ill wrap my manifold and im in the midel of making a duct to blow cold air on to my filter. iv been told that with a biger intercooler i can run more psi safley and it will make my engine last longer. im curently running 9-10 psi

Re: Lightened flywheel question...
 

that intercooler is wayyyy too big for your setup i don't care if you were running 20psi on that pathetic snail. the setup is overkill. all you need is like 20x6x2.5 with 2" inlets and chargepiping. you're problably experiencing a 6psi drop with all that volume to fill and even at its peak output the turbo doesn't produce enough cfm to compensate.

Re: Lightened flywheel question...
 

the turbo is too small to be laggy, strange, definately a intercooler/charge pipe issue. even though I went from a 6"X3"x36" tube&fin intercooler to a 10.5"x4"x34"bar& plate intercooler with a sc61 on a ls/vtec at the same psi on both intercooler, and I did not notice any drop in psi or spoolup time. so I guess it depends on the size turbo and intercooler, I will see if change in weight of my flywheel will do anything, I dont know if it will be noticeable since I am going from 8lbs to 9.75 lbs, should change nothing.

and for the original poster, please dont use that underdrive pulley, its bad! really bad! I am not talking from what I read on the forums, I am talking from experience, my b16 block is sitting on the engine stand waiting for new main bearings, after 7000 miles, while using a lightweight pulley. oil pressure dropped from 75 to 50 to 25 to 0 psi, replaced oil pump, still zero, checked main bearings they are worn bad.

Re: Lightened flywheel question...
 

8 lbs chromoly here. likin it so far, we'll see how it takes to boost compared to stock

Re: Lightened flywheel question...
 

LOOOOVE my exedy flywheel, wouldnt trade it back for the world. lightened flywheel + boost= :6

Re: Lightened flywheel question...
 

Thanks for all the input. I think I will still go with a lightened (but not so much) flywheel - around 11#

As for the underdrive pulley comment thanks for the advise but I really don't see how that would have any effect on oil pressure? The pulley doesn't drive the oil pump nor does it allow the engine to "rotate slower" causing reduced pumping. All it will be doing is driving my alternator slighlty slower.

I looked up unorthodox racing's opinions on this and they said that Honda/Acura engines are internally balanced and therefore there is no need for a harmonic balancer or a heavy stock larger diameter pulley. Anyone else have any bad experiences with underdrive pulleys? Am I out to lunch for wanting to run one?

Re: Lightened flywheel question...
 

your oil pessure is built at your bearings, if you have too much clearance you wont have any oil pressure,
I used to think the same way like you about the pulley not having anything to do with oil pump, if you search me you will find my post about it. I never learned until it happened to me
the pulley caused vibration, the vibration wear out your main and rod bearings, even though it does not affect your oil pump it ---- up your bearings, I wish I would have took pictures of my bearing clearance before and after the pulley. look around you will see what I am talking about. I was warned, and I say I will have to learned for myself, I did . I am using a ls vtec right now not because I wanted to, but because my b16 had no oil pressure, so I had a ls block as a spare so I put it in so I wont have any down time. now I need to rebuild the b16 with new bearings, because I was hard headed. but it will be my spare now

Re: Lightened flywheel question...
 

fluidamper, ati or U.R are all aftermarket pulleys. i don't believe any of that bs about my aftermarket crank pulley killed my engine. thats not the case. if you have one of those cheap ass ebay crank pulleys what the hell do you expect. honda engines are internally balanced so a light weight crank pulley that is true and well made and balanced from the factory will not harm your engine. the stock pulley doesn't even contain any damnpening material. yea since the ctr motor had an n1 pulley from the factory they toasted their bearings too? im half asleep so i'll elaborate later :X

Re: Lightened flywheel question...
 

i remember i read somewhere that the honda crancks are counter-balanced with the weight of the stock cranck pulley so if you put a lighter one it will break..
and this ---- happened to me too i had lots of shaved metal in my oil after 2k miles with the light cranck pulley.. i lost a cranck, a rod etc.. listen to us before you use one.. i admit mine was a poor quality cranck pulley but it was balanced (not with the cranck) and it still happened

Re: Lightened flywheel question...
 

Counterbalancing has nothing to do with the flywheel or crank pulley. Honda motors are internally balanced as well.

Install quality crank pullies/flywheels, and have the balance checked before installing them, no more problems.

Re: Lightened flywheel question...
 

honda crank pullies have no dampening material... LOL...


And then you wake up. Dont use those shitty non-harmonic balancer type of crank pullies no matter what the brand.

Re: Lightened flywheel question...
 

i know for a fact that d series never had any dampening material i.e. rubber have you ever cut one in half ? i guess not. any evidence on you disbelief?

Re: Lightened flywheel question...
 

One easy way to know if ANY engine needs to be balanced with the flywheel is...the flywheel will have a offset bolt or some sort of dowel pin in the flywheel that will only allow you to bolt it on one way. Some motors only have a mark that needs to be lined up...but most of the time you can only bolt it on one way. Just FYI...

Re: Lightened flywheel question...
 

I went with a 12lb steel one from LSD Mike

Couldnt be happier

Re: Lightened flywheel question...
 

You might wanna look at a D16Z6, D16Y5. D15Y7, and D16Y8 crank pulley. If your not finding rubberm the quite screwing your sister!

Long stroke D's (D16) have rubber built into the dampener.

I'll bet no one knew the Y5/Y7 pulley was 1.7 pounds lighter than the Y8/Z6 pulley. I know, I weighed them.

Re: Lightened flywheel question...
 

take a look at this pulley and tell me if you see a rubber ring in the middle? https://www.homemadeturbo.com/forum/...?topic=60826.0
thats my stock pulley its damage but I did not use it on my b16, I used an unorthodox aluminum pulley, I also used to own a d16z6 it too has the same design with the rubber. I too used to think like you until I used one and destryed my motor, the motor is still good but needs new bearings.

fluidamper and ATI pulleys are design to help harmonics so it does not compare to aluminum pulleys, the NI pulley is design to be used with the type R so it don't compare to a chunk of aluminum.

Re: Lightened flywheel question...
 

Unorthodox pulley = bad idea...Rudebwoy has the proof -regardless of "perfect geometry", harmonics are still generated, and after long enough...they take their toll.

Re: Lightened flywheel question...
 

well im not trying to claim im some expert on this ---- but i never had rubber in any of my d series pulleys or on my dohc zc currently. i want to look into getting a fluidamper but i don't think they made them for the d series. why don't early model d's have rubber dampening material?