Ring Gear Tooth Count

Go down

Ring Gear Tooth Count

Post  JR Performance Motorsport on June 30th 2012, 11:54 pm

Ok guys !!! I need to slow my out of water revs. I am hitting 8000 plus when I come out of the water, normally I run 6200 to 6400 ina heat, but in shit water I end up sucking alot of air in the straight aways. I'm thinking of switching to a flywheel from a flexplate. The problem I see is the flexplate is 164 teeth http://www.summitracing.com/parts/SCA-FP-460-SFI/ and the flywheels have 184 or 176 teeth http://www.summitracing.com/parts/CTF-700280/ .

Do I need to get a 4/5 speed locator plate from a manual truck to do this ?

JR Performance Motorsport

Posts : 200
Join date : 2010-12-01
Age : 49
Location : Bullhead City AZ

View user profile http://www.e-PerformanceMarine.com

Back to top Go down

Re: Ring Gear Tooth Count

Post  Wheelie58 on July 1st 2012, 2:18 pm

Jim,
The difference in starter location between a 164 tooth auto Trans and a stick setup with the 184t wheel is approximately .6655" (radius from the crank center)
I can make you a custom starter locator plate, but your flywheel housing (for the boat) will stlii have the wrong (smaller) location. I will assume the starter bolts to the boat's flywheel housing.
We could make a 3/8" thick plate with the "new" starter location and bolt the starter to that, if you can't get a different flywheel housing.
Just brainstorming....
Keith
avatar
Wheelie58

Posts : 1840
Join date : 2009-08-08
Location : Alpharetta, GA

View user profile http://www.keithfulpmotorsports.com

Back to top Go down

Re: Ring Gear Tooth Count

Post  richter69 on July 1st 2012, 3:34 pm

Why not use a rev liniter?
avatar
richter69

Posts : 13645
Join date : 2008-12-02
Age : 47
Location : In the winners circle

View user profile

Back to top Go down

Re: Ring Gear Tooth Count

Post  maverick on July 1st 2012, 5:55 pm

richter69 wrote:Why not use a rev liniter?

Makes sense to me....but I ain't no boat racer. Arrow
avatar
maverick
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 3051
Join date : 2009-08-06
Age : 66

View user profile

Back to top Go down

Re: Ring Gear Tooth Count

Post  whatbumper on July 1st 2012, 9:01 pm

I don't see changing to a flywheel will help any. Rev limiter.

whatbumper

Posts : 3020
Join date : 2009-11-11
Age : 37

View user profile

Back to top Go down

Re: Ring Gear Tooth Count

Post  JR Performance Motorsport on July 2nd 2012, 12:11 pm

I can put almost any chip in the box and it will walk right on past it.

JR Performance Motorsport

Posts : 200
Join date : 2010-12-01
Age : 49
Location : Bullhead City AZ

View user profile http://www.e-PerformanceMarine.com

Back to top Go down

Re: Ring Gear Tooth Count

Post  maverick on July 2nd 2012, 12:24 pm

Suspect MSD?
avatar
maverick
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 3051
Join date : 2009-08-06
Age : 66

View user profile

Back to top Go down

Re: Ring Gear Tooth Count

Post  maverick on July 2nd 2012, 1:05 pm

Never saw one just run right past a functioning rev limiter...but, again, I'm not a boat racer. What type limiter are you using?
avatar
maverick
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 3051
Join date : 2009-08-06
Age : 66

View user profile

Back to top Go down

Re: Ring Gear Tooth Count

Post  JR Performance Motorsport on July 2nd 2012, 3:13 pm

f I puta 6800 in it my tach will show a spike of 8200, if I put a 7200 it drops to 7800. The box is a 6AL and the rev limiter does work. I have tested it a few times with low rpm chips.

JR Performance Motorsport

Posts : 200
Join date : 2010-12-01
Age : 49
Location : Bullhead City AZ

View user profile http://www.e-PerformanceMarine.com

Back to top Go down

Re: Ring Gear Tooth Count

Post  richter69 on July 2nd 2012, 3:28 pm

I've broke driveline parts in the past at wot and never had one rev past the set limit, sometimes the chips can be off some also.
avatar
richter69

Posts : 13645
Join date : 2008-12-02
Age : 47
Location : In the winners circle

View user profile

Back to top Go down

Re: Ring Gear Tooth Count

Post  maverick on July 2nd 2012, 6:54 pm

richter69 wrote:I've broke driveline parts in the past at wot and never had one rev past the set limit, sometimes the chips can be off some also.

Same here. I've busted rears & trannys with no over-rev.

Lem's a nautical sorta dude....Wutsup here, Lem?
avatar
maverick
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 3051
Join date : 2009-08-06
Age : 66

View user profile

Back to top Go down

Re: Ring Gear Tooth Count

Post  Lem Evans on July 2nd 2012, 7:33 pm

The FP-460-SFI is an external bal. flexplate.
The FP-460A-SFI is an internal bal. """""""""".

Whatever the tooth count/dia. is on the Scat unit...it's the same as the stock flex plates...the heavy manual trans. flywheel is a different animal.

I do not think a flexplate/flywheel change will address your issue.
Can it be heard when the engine is susposed to be on the chip?

Lem Evans

Posts : 7018
Join date : 2008-12-03
Location : Livermore , Ky

View user profile http://bfevansraceparts.com

Back to top Go down

Re: Ring Gear Tooth Count

Post  JR Performance Motorsport on July 2nd 2012, 11:36 pm

Yes every chip on the lower rpm can be heard ! Say I put the 3500 chip in, it hits it and wont go above. I put the 4500 in and it hits it and wont go above. I put the 5k in and same thing, on the trailer. I put the 6400 in and I walk right past it. Same with the 7200 chip ! I bought new ones thinking they were old and bad. Same thing they walk right on by !

JR Performance Motorsport

Posts : 200
Join date : 2010-12-01
Age : 49
Location : Bullhead City AZ

View user profile http://www.e-PerformanceMarine.com

Back to top Go down

Re: Ring Gear Tooth Count

Post  Wheelie58 on July 3rd 2012, 1:08 am

Using an MSD ignition tester ( the one that simulates the engine running) would help pinpoint this issue.
That tester is great for things like this.


Last edited by Wheelie58 on July 3rd 2012, 7:39 am; edited 1 time in total
avatar
Wheelie58

Posts : 1840
Join date : 2009-08-08
Location : Alpharetta, GA

View user profile http://www.keithfulpmotorsports.com

Back to top Go down

Re: Ring Gear Tooth Count

Post  466cj on July 3rd 2012, 2:48 am

There is either a noise issue, ground issue, or problem with the MSD box.

466cj

Posts : 391
Join date : 2011-05-01
Location : San Antonio, TX.

View user profile

Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum