advance curves

[dan t.]

Acording to the SB Chev Marine Performance book by Dennis Moore the thunderbolt IV 22A module has full advance by 3500 rpm.

Acording to the MT Boats website the 22A isnt all in until 4400 rpm.

Who is correct?

 

[Fun Times]

Re: advance curves

Acording to the SB Chev Marine Performance book by Dennis Moore the thunderbolt IV 22A module has full advance by 3500 rpm.

Acording to the MT Boats website the 22A isnt all in until 4400 rpm.

Who is correct?

See if you can find the engine that you are working with in this link.

http://www.boatfix.com/merc/Bullet/95/95_11.pdf

 

[John_S]

Re: advance curves

There are a few small errors in DM's book. I believe he has the data for V8-22A and V8-22 swapped. Go by the link provided by Boat Tech.

 

[Don S]

Re: advance curves

The 22 (for a 5.0) is full advance at 3500, but the 22A (for a 5.7) is 4400.

 

[dan t.]

Re: advance curves

Thanks for the replys, I knew something was haywire, just wasnt sure if it was the book, the module or my timing light, turns out it was the book,got off cheap on that one.Oh and another good source of info to stick in my favourites