help with timing for more power
#11
VIP Member
VIP Member
Thread Starter
Join Date: Mar 2001
Location: Vermont
Posts: 706
Likes: 0
Received 0 Likes
on
0 Posts
Thanks for all the input. Dave - I have the V8-20R module. it sounds like I need to install a V8-24 module and set final timing at 32-34. Vmax - I have a more current ignition and I believe I need the module # 15248A1 which is the plastic module design that is riveted to an aluminum plate and mounted on the exhaust elbow. In any case it also sounds like I need to have all my advance in at a lower rpm and only a module chamge will do that
The problem with changing props is that the 24 spinelli that I have on the boat is perfect for getting out of the hole and midrange cruising but it is a little shy of peak rpm.
The problem with changing props is that the 24 spinelli that I have on the boat is perfect for getting out of the hole and midrange cruising but it is a little shy of peak rpm.
#12
Registered
Join Date: Feb 2002
Location: Honeoye, NY
Posts: 763
Likes: 0
Received 0 Likes
on
0 Posts
Dennis Moore's Marine Hi-Perf BBC book lists all Merc's modules and the advance that they are intended to give through the entire RPM advance range. A 24 deg. mod. was standard equipment on all the basic and mid performance packages. I like the V8-20 (not R) for my purposes but my cam is far from stock and I need the extra advance at idle. Sounds like the 24 should really be all right for you when you get the final advance up to that 32-34 deg. range at WOT. (or anything over 3500 RPM with a 24 deg. mod.) Too bad Mike Spinelli isn't doing props anymore cause I know he would have been happy to tweak yours to give you just what you want. He "readjusted" mine 3 times at no charge. But you might give Darrin at Houston Prop a call. I bet he'd fix you up reasonable. TIP: Tweak your engine before you tweak the prop! --- Jer
#13
Registered
Join Date: Oct 2003
Location: Colleyville, TX
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by powerguy
Thanks for all the input. Dave - I have the V8-20R module. it sounds like I need to install a V8-24 module and set final timing at 32-34. Vmax - I have a more current ignition and I believe I need the module # 15248A1 which is the plastic module design that is riveted to an aluminum plate and mounted on the exhaust elbow. In any case it also sounds like I need to have all my advance in at a lower rpm and only a module chamge will do that
Thanks for all the input. Dave - I have the V8-20R module. it sounds like I need to install a V8-24 module and set final timing at 32-34. Vmax - I have a more current ignition and I believe I need the module # 15248A1 which is the plastic module design that is riveted to an aluminum plate and mounted on the exhaust elbow. In any case it also sounds like I need to have all my advance in at a lower rpm and only a module chamge will do that
I would be willing to let it go for half that with no shipping charge guaranteed to fill your need. Let me know. If you can find it cheper used let me know and we can negotiate.
Thread
Thread Starter
Forum
Replies
Last Post
tomas_wallin
General Q & A
7
05-26-2005 02:06 AM