96 inch stroker question

Closed Thread Subscribe

Thread Tools

Search this Thread

Jul 31, 2006 | 06:15 PM

BigGeorge

Thread Starter

Road Captain

Joined: Mar 2006

Posts: 688

Likes: 0

From:

96 inch stroker question

We all know that the 88 inch engine was upped to 96 inches by increasing the stroke. Now its always been known that if you increase the stroke you get more power / torque, but the down side has always been that a stroker motor sacraficed longevity. So now the MOCO compensates by adding a 6 speed tranny so that the motor is turning less RPM's in 6th gear but 6th gear is only good above 70mph. If you are doing other than expressway driving you will be in a lower gear and that motor will be pounding itself to death. Correct me if i'm wrong................BG

Jul 31, 2006 | 06:47 PM

Bear64

Banned

Joined: Jul 2005

Posts: 2,543

Likes: 1

From:

RE: 96 inch stroker question

Where did you hear that a stroker motor sacraficed longevity??? a motor is a big ol air pump, if built right it should be ok..How many miles do you want it to run?? how many years?? I'm quite sure that if I had a 96 incher I wouldn't worry about it..now?? some of the after market big inch motors, I have heard horror stories about them.. go ride it and stop worrying about it.

[sm=biker.gif]

Jul 31, 2006 | 07:14 PM

grunt

Extreme HDF Member

Joined: Jun 2006

Posts: 17,682

Likes: 3

From: Dallas, TX

RE: 96 inch stroker question

What strokers sacrifice is top RPM for low RPM grunt (no pun intended). The 96s are also supposed to have lighter parts, and that helps on rotational stresses.

For example, the Chevy 302s (327 motor w/283 crank) were prized for their rev-ability - good for road courses. Whereas 383s (punched 350s w/400 cranks) were for torque and wanted by draggers/muscle cruisers.

Jul 31, 2006 | 07:26 PM

pittguy

Outstanding HDF Member

Joined: Jul 2006

Posts: 2,303

Likes: 4

From:

RE: 96 inch stroker question

Harley has been selling us de-tuned bikes for yrs.How much cash has paid for these screaming ealge kits.

Jul 31, 2006 | 10:10 PM

kpreese

Road Captain

Joined: Dec 2005

Posts: 591

Likes: 1

From: Land O'Lakes, FL

RE: 96 inch stroker question

Quote:

ORIGINAL: Bear64
Where did you hear that a stroker motor sacraficed longevity???

Two motors running at the same RPM, the one with the longer stroke has higher piston speeds so there could be more wear. The increased piston speeds also put more stress on the rods. That would also mean more stresses on the bottom end as well. BUT, that doesn't mean the increased wear and stresses are excessive. Plus, if they are run at lower RPM, that could easily be offset.

I am still happy with my TC88 but I wouldn't be a bit worried about the TC96 either.

Kevin