Need a flywheel for a big block Chevy, 153 tooth, (and here is the kicker) needs to be for a single piece seal crank. It's for a 454 but at this point I'll take a neutral balance flywheel and have it rebalanced if needed.

Do you need a flywheel or a flex plate?

http://www.summitracing.com/search/p...9%2B4294924890

http://www.summitracing.com/search/p...6%2B4294924890

Looking for a flywheel. The flywheels in your Summit link are for small blocks. I even ordered the 1st one on the list (for a small block) and it will not fit.

They were all 153 tooth, there should've been BB ones in there.

What's the application?

put this in the wanted section also, Im sure you will get a bunch of answers, I got some stuff from Ron Im sure he has one


Ron 504-616-6005
Sporl Performance

http://paceperformance.com/i-5153859...-5-clutch.html

Why a 153 tooth for a Big Block

Alright here’s the deal. This is a Gen V, 454 that is attaching to a Volvo Penta bellhousing. Sadly the bellhousing I have in stock is for the smaller flywheel (most likely for a small block). I know that a larger flywheel is used in most boats to keep the motor spinning under load but this motor is going in an 18’ Donzi and not a heavy boat so having a bigger flywheel is not necessary and will even help the motor rev faster giving the boat a better take off. I’ve done this before in an 18’ Monza (bigger boat) that worked out well but it was with a Mark IV 454 with a 2pc seal.
This is where everything gets screwed up. It’s been 4 or 5 years since I’ve done this so just to be on the safe side I did a little internet searching and started finding flywheels listed for 1pc and 2pc seals. Now I remembered having (what I thought were) Mark IV flywheels rebalanced for Gen V’s for the 2 motors in the race boat but now I was second guessing it. Maybe they were Gen V flywheels after all. Then on the net post after post on site after site said that there was a difference in the bolt pattern, center hole and balance of a single piece seal flywheel compared to a 2pc. Not finding a 153 tooth, single pc seal, flywheel anywhere I came here thinking someone would come on and say the definitive answer on what the deal was but I guess most are like me and if it came with the motor it stays (after it’s re-balanced of course).
So today after moving a bunch of stuff around I got out all my flywheels. I keep them all because you never know.



Top of picture - motor is Gen V 454.
Right side of picture – Volvo Penta Bellhousing
B – Original to motor flywheel, #10101171, externally balanced 14" diameter with 168 teeth on the starter ring gear
A – Is off a 1969 Kiekhaefer 482ci (stroked 427ci tall deck), 2pc seal
C – Is a new 427, internal balanced, 168 tooth, 2pc seal http://www.summitracing.com/parts/atp-z296
D – Is a Flexplate I took off of a Gen V 454 a few years back (a good balancer can match a manual flywheel to it if they know what they are doing)
E – One of the first ones on the Summit list, 153 tooth, external balance http://www.summitracing.com/parts/ZZZ-50-6503

All but “E” (small block) fit the crank, all the bolts lined up, wasn’t going to hit anything when spun and the ring gear is in the exact same place as the original flywheel. Besides the weight being off between the 1969, 427’s flywheel and the Gen V there was no difference between the two. So I guess I’m going to try my luck with a 2pc seal flywheel and keep my fingers crossed. As long as it lets the bellhousing go on and the ring line up I can work with it at this point.

so the one-piece and two piece 454 flywheels are same bolt pattern? i assumed they were diff cuz small blocks are. another possibility. it is a 19 foot boat. put a 427 in it.

Need to search and see if there were any applications that used such a odd ball deal...the kicker is the one piece seal as the cranks are different in balance...