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  WHAT FLYWHEEL TO RUN FOR A 3800 S/C FIERO?

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WHAT FLYWHEEL TO RUN FOR A 3800 S/C FIERO? by fieroaddicted
Started on: 12-16-2012 09:38 AM
Replies: 13 (687 views)
Last post by: IMSA GT on 07-19-2013 10:13 PM
fieroaddicted
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Report this Post12-16-2012 09:38 AM Click Here to See the Profile for fieroaddictedClick Here to Email fieroaddictedSend a Private Message to fieroaddictedEdit/Delete MessageReply w/QuoteDirect Link to This Post
I have a 87 GT with 5 speed getrag trans. Doing a 3800 s/c swap using a 97 engine and an f23 tranny. Do I just get a camaro flywheel from the same year and have it machined if needed? Or are there different ones?
troy

[This message has been edited by fieroaddicted (edited 05-21-2013).]

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Report this Post12-16-2012 10:34 AM Click Here to See the Profile for CowsPatootClick Here to visit CowsPatoot's HomePageSend a Private Message to CowsPatootEdit/Delete MessageReply w/QuoteDirect Link to This Post
Camaro 3800 flywheel, cut down to .840" thick, and balanced to match the original flexplate. The balancing is the secret. The NA 3800s are internally balanced, so the flywheel will have a neutral balance...the SC 3800s are externally balanced.
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fieroaddicted
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Report this Post12-16-2012 10:52 AM Click Here to See the Profile for fieroaddictedClick Here to Email fieroaddictedSend a Private Message to fieroaddictedEdit/Delete MessageReply w/QuoteDirect Link to This Post
Does the flywheel have to be from the same year or does that matter?
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Justinbart
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Report this Post12-16-2012 11:06 AM Click Here to See the Profile for JustinbartSend a Private Message to JustinbartEdit/Delete MessageReply w/QuoteDirect Link to This Post
No series 2/3 3800s were internally balanced. Machine it to .820".

Any 3800 camaro flyhweel will work. Your best bet is to find an OEM one from a junkyard if you can. Some china flywheels have bad metal.

------------------
Turbo 3800 E85 F23 5spd spec5
11.17@132.6

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fieroaddicted
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Report this Post12-16-2012 11:19 AM Click Here to See the Profile for fieroaddictedClick Here to Email fieroaddictedSend a Private Message to fieroaddictedEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Any 3800 camaro flyhweel will work. Your best bet is to find an OEM one from a junkyard if you can. Some china flywheels have bad metal.


sweet, thanks. I will definitely check that out.. It should be fairly easy to find i hope.
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Report this Post12-16-2012 11:27 AM Click Here to See the Profile for JustinbartSend a Private Message to JustinbartEdit/Delete MessageReply w/QuoteDirect Link to This Post
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Report this Post05-21-2013 07:59 AM Click Here to See the Profile for hdryderClick Here to Email hdryderSend a Private Message to hdryderEdit/Delete MessageReply w/QuoteDirect Link to This Post
I am see both of the following comments above, about flywheel thickness for machining.

Which thickness is most recommended for least amount of issues?

Thanks for the help


Camaro 3800 flywheel, cut down to .840" thick, and balanced to match the original flexplate.

No series 2/3 3800s were internally balanced. Machine it to .820".
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FFIEROFRED
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Report this Post05-21-2013 08:13 AM Click Here to See the Profile for FFIEROFREDClick Here to Email FFIEROFREDSend a Private Message to FFIEROFREDEdit/Delete MessageReply w/QuoteDirect Link to This Post
If your grany is going to drive it do the camaro flywheel thing. Heavy flywheels are for little engines in heavy cars. You have a little, light car with a very big TQ engine. use a alum fly wheel. You will love it. It will SCARE ricers.
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fieroaddicted
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Report this Post05-21-2013 05:15 PM Click Here to See the Profile for fieroaddictedClick Here to Email fieroaddictedSend a Private Message to fieroaddictedEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by FFIEROFRED:

If your grany is going to drive it do the camaro flywheel thing. Heavy flywheels are for little engines in heavy cars. You have a little, light car with a very big TQ engine. use a alum fly wheel. You will love it. It will SCARE ricers.


heh yeah, but i have already bought a camaro flywheel. Actually i just got a call today stating that the machining and balancing is done and it is ready to be picked up. Now i just need to get my htob and i can mate the engine and trans together.

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Report this Post05-21-2013 06:18 PM Click Here to See the Profile for phonedawgzClick Here to visit phonedawgz's HomePageClick Here to Email phonedawgzSend a Private Message to phonedawgzEdit/Delete MessageReply w/QuoteDirect Link to This Post
The 3800 NA & SC are both externally balanced.

The SC has a bigger counterweight (external balance) than the NA, but they both are externally balanced.
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FFIEROFRED
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Report this Post05-21-2013 08:07 PM Click Here to See the Profile for FFIEROFREDClick Here to Email FFIEROFREDSend a Private Message to FFIEROFREDEdit/Delete MessageReply w/QuoteDirect Link to This Post
The light flywheel will let it rev quick. the stock one will rev slooow.
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Report this Post05-22-2013 01:18 AM Click Here to See the Profile for IXSLR8Click Here to Email IXSLR8Send a Private Message to IXSLR8Edit/Delete MessageReply w/QuoteDirect Link to This Post
I think the Camaro flywheel is better because of the extra weight and because its all steel and allows you to use a larger clutch.

I had the aluminum flywheel with the steel insert and it tended to stall out in first gear because it was so light. Also, I could only use the smaller clutch disc because of the size of the steel insert.

I bet you get better fuel mileage on the freeway with the steel flywheel over the aluminum one because of the extra rotational mass.
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FFIEROFRED
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Report this Post05-22-2013 08:07 AM Click Here to See the Profile for FFIEROFREDClick Here to Email FFIEROFREDSend a Private Message to FFIEROFREDEdit/Delete MessageReply w/QuoteDirect Link to This Post
their are more than one company you can get a alum flywheel from.

don't stall it.

get one for the bigger clutch.

It takes gas to get that man hole cover rotating. The engine can put more work in to moving the car instead of moving the fly wheel.
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IMSA GT
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Report this Post07-19-2013 10:13 PM Click Here to See the Profile for IMSA GTClick Here to Email IMSA GTSend a Private Message to IMSA GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
.....wrong thread

[This message has been edited by IMSA GT (edited 07-19-2013).]

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