Flywheel & Top End Issues

[Gonzo]

My problem is that i blew my engine and bought this 7lb fidanza flywheel to put on the new engine and i dont have much of a top end. I get it up to around 6k and it just doesnt wanna go anymore and it like it just spins and the rpms dont climb. The engine i have was used and has 110k miles on it and i have put about 200 on it since i got it. Does this mean somethings wrong or is this normal?

Any oppinion is helpful thanks. Peace

Ps. I have I/h and a mufler(not piping YET) and the flywheel....thats it

 

[Gonzo]

bump for some help?

 

[J32a2OwnsU]

timing maybe....... i dont think it has anything to do with your flywheel....it should still go to redline....


clutch?

 

[Gonzo]

It will still go to redline but it takes forever

 

[J32a2OwnsU]

unbalnced.not put on right?

 

[Gonzo]

possible...the people who put it in were a bunch of hill-billys whats a good way to proove that?

 

[J32a2OwnsU]

s**t man, I dont even know if thats the issue........honestly you give too little info to even try to e-diagnose.

 

[Gonzo]

umm...it runs just fine, idles alright...i taped th trottle on it and it rezs to 3k and i did the same thing to my friends Si and it went to 2k, theres not much difference from the old one in traffic...everything feels about the same as stock excet that it revs a lil faster and i dont have much of my top end....

 

[J32a2OwnsU]

I just dont know sir..... sorry.

 

[Gonzo]

ight thanks for ur help, i gotta get to bed

 

[Sleeper]

The function of a flywheel is to add rotational inertia. For those who know, the engine can rev much faster if the inertia of the flywheel is reduced. If you want less inertia, then you can take mass off of an exiting flywheel or replace with a lighter design. People lighten flywheels to decrease initial rotational inertia which would add to acceleration, but a decreased top end. I was thinking that if the flywheel weighed nearly nothing then the engine would take off like no other, but obviously top engine speed would drop. If only there were a medium, but theres none so you find one close such as a 12lb for such a motor with power as yours. Its all science, I hope this answers question. Free free to ask me anything else.

So Joe did I spell eveything right lol

 

[Gonzo]

What can mod can i do that will give me some of that top end back? Why is it bad to go turbo with lighter flwheels like mine?

 

[evan2]

because between shifts you will drop out of boost because its so light...



your flywheel has nothing to do with this issue.

 

[Gonzo]

bump for some info

 

[Gonzo]

what should i get to help out my top end?

 

[anekin007]

why people put super light flywheels on nearly stock cars i dont understand. lol

put it on neutral and rev it up to redline to see if it even goes up there. im guessing its more of a engine problem for it not revving pass 6k. but i still think its a waste of money putting a super light flywheel on a car that is lacking torque and power.

 

[Sleeper]

why people put super light flywheels on nearly stock cars i dont understand. lol

put it on neutral and rev it up to redline to see if it even goes up there. im guessing its more of a engine problem for it not revving pass 6k. but i still think its a waste of money putting a super light flywheel on a car that is lacking torque and power.

Its the flywheel. you be surprised how the wieght effects the way a motor performs so much. I gave the resond why this happens in my first post.. it not something made up what I stated was true. & I also dont understand why people put super light flywheels on nearly stock cars, I guess they think the lighter the better....

 

[anekin007]

im not sure, i know someone with a 8lb flywheel on a d16 non vtec. it went up to redline no problem. but car is a shitty dialy driver car with all the loss low end power.