RWHP loss w/ 31 spline axles?

[zenboy99]

I just had two mechanics tell me that if I switch to 31 spline axles I'll see a loss in rwhp do to the weight of the axles. Is this true? Are they that much heavier then our stock axles?

 

[Rootus]

Given the small rotating mass, I can't imagine that a larger axle will have anywhere near as much affect as say, a new set of wheels. Even if they weighed twice as much, they have such a small diameter that there just isn't going to be much if any affect.

 

[Joes95GT]

I can see the reasoning behind their theory, but I don't agree. The pinion is going to climb the ring gear at the same rate despite the weight of the axles. Of course, this is all within reason. If the axles weighed 2 tons, that may be different. The axles that are a few pounds heavier may result in 2 less RWHP, if that.

Just my opinion...

Joe

 

[zenboy99]

Thats what I thought, and I tried to explain that to these guys, but they insisted I would see a loss. Both of them are pretty knowledgeable with drag racing. Maybe I'll just have to prove them wrong?

 

[Rootus]

Maybe I'll just have to prove them wrong?

That's my favorite response to dumb people, so I say go for it .

 

[zenboy99]

BB&T racing has a package for $559 that includes
-Moser 31 spline axles
-Eaton Posi diff
-Wheel studs

I think thats a pretty good deal, haven't been able to find anything better. The one wheel peel is getting old and the local Fun Ford Weekend is coming up.

 

[Killercanary]

I haven't dyno'd mine since putting in the axles, but I doubt I lost anything. Maybe between both the TKO and the axles I lost a few...

 

[Nik_95Cobra]

I didn't notice ANY loss or rpm changes when I went to the 31's. Not sure how much my Tremec soaked up but it prolly wasn't anything big.

 

[89MustangGX]

I'm pretty sure my Strange 33-spline axles are lighter than stock. I also had the flanges pocket milled which lightened them up more.

Who says 31-spline axles have to be heavier?