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Forum: Prop Talk

03-12-2007, 04:55 PM

Replies: 11

31SS Sonic- more power, bigger props??

Views: 1,590

Posted By blown formula

I sure hope so. They are starting to get...

I sure hope so. They are starting to get expensive!! Too much to just have a pair or two to:eek: lay around on the shelf.

Forum: Prop Talk

03-12-2007, 01:03 PM

Replies: 11

31SS Sonic- more power, bigger props??

Views: 1,590

Posted By blown formula

Thanks. It will be a couple of months yet to...

Thanks. It will be a couple of months yet to test... I have recovery from shoulder surgery in April to deal with.... then the LAKE!!:drink:

Forum: Prop Talk

03-12-2007, 08:45 AM

Replies: 11

31SS Sonic- more power, bigger props??

Views: 1,590

Posted By blown formula

The hp#'s are accurate. They came from a dyno...

The hp#'s are accurate. They came from a dyno run just before tear down when we found 3 valve guides had fallen out of the heads. I now have Brodix heads.... that is the reason for the bigger...

Forum: Prop Talk

03-12-2007, 08:09 AM

Replies: 11

31SS Sonic- more power, bigger props??

Views: 1,590

Posted By blown formula

Yes, it was in the high 5000's, I don't remember...

Yes, it was in the high 5000's, I don't remember exactly. I was also running alot of trim at the time... actually too much!

My max power is;
588 hp @6000 514# torque (stated above).
555.6 hp...

Forum: Prop Talk

03-11-2007, 09:52 PM

Replies: 11

31SS Sonic- more power, bigger props??

Views: 1,590

Posted By blown formula

Yes, 4 blade Bravo 1's. I also have a set of...

Yes, 4 blade Bravo 1's. I also have a set of "special" 29" 14.5 diameter to try. I never dreamed I would need props that tall! Guess I'll have to hit up some of my cat buddies for props to...

Forum: Prop Talk

03-11-2007, 08:34 PM

Replies: 11

31SS Sonic- more power, bigger props??

Views: 1,590

Posted By blown formula

31SS Sonic- more power, bigger props??

Last summer my '88 Sonic 31SS ran 75 (GPS) with 23" props, 1.5 Bravo's. I only had 485hp (x2) then but now have 555hp & 540# torque @ 5400....... What prop pitch should I need??
I have some 26" &...

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