4.1 Flywheel

[79bird]

I may have asked this a long time ago but don't remember now. Does anyone make a flywheel to fit to a 4.1 so I can put a 5-speed stick behind it?

 

[turbobob924]

YES!

I originally built my 4.1 for my hybrid Porsche w a 5 speed.

Advanced Adaptors makes flywheels for buicks V's

Make sure you specify even or odd fire.

Good time to get the rotating assemby balanced once you get the flywheel too.

 

[79bird]

Thanks Bob, I'll check them out. Looking at ideas for future projects if I don't like the 200-4R
Edit; I looked on the Advanced Adaptors site and couldn't find the flywheel. Do you have a part number? And how long ago did you do your build?

 

[charlief1]

The 4.1 never came with a manual but... You can use one off a 3.8 if you rebalance it or take the 4.1 flexplate to a shop that does balancing and have them match the balance. Not hard or very expensive.

 

[turbobob924]

I did not ID 4.1 vs 3.8.

Advanced adapters sells a Buick V6 flywheel.

Call them and ask.

It was a while ago....

 

[fuzzyGN]

It may not be technically correct but I used a 3.8 H-body flywheel behind my 4.1 engine for 2 years. I really didn't notice any issues but then again I didn't really care much about the vibrations etc. This engine was an expirement/bomb. My biggest problem was keeping a clutch in it. The H-body flywheel is stepped so only a 9" or slightly bigger clutch will fit. Also, if you are thinking about using the T-50 trans that originally came in these cars be careful. They do not handle much power. I know because I now have a TH-350 in the car with a brake. The 5 speed was great for a driver but it wasn't great for enthusatic shifting and a heavy right foot.

 

[79bird]

I'd use a T-5, not a 50. I actually had a t-50 a few years back but sold it to another H-Body owner. I have all the info from the H-body FAQ to go by. I just want to find out if a flywheel is available or can be fabbed. I most likely will go with the 200-4R I have. I'm not building a barn burner, just a nice driver. A stick would be a fun alternative.