MSD advance springs??
#12
Registered
Platinum Member
Thread Starter
Next test run I am putting in 18degree bushings and setting springs for full advance at as close to 2000 as I can get them. I will set initial timing at 16dgress. This should advance it to 34. I think this set up will get me closer to where I want to be.
#13
Gold Member
Gold Member
Join Date: May 2002
Location: DFW
Posts: 1,127
Likes: 0
Received 0 Likes
on
0 Posts
The reason for 64 questions is relative to "lugging" your engine .
You never stated the gear ratio or prop pitch. However,at 600 HP one might assume the ratio to be 1.68 gears w/a 28 or 29" prop for 11,000 #.
To be on the safe side,possible to run 87 octane from time to time knowingly or unknowingly and reduce risk of detination I would start at 16 -18 *and curve to 3500 RPM for "all in" 34*
You never stated the gear ratio or prop pitch. However,at 600 HP one might assume the ratio to be 1.68 gears w/a 28 or 29" prop for 11,000 #.
To be on the safe side,possible to run 87 octane from time to time knowingly or unknowingly and reduce risk of detination I would start at 16 -18 *and curve to 3500 RPM for "all in" 34*
#14
Registered
Platinum Member
Thread Starter
The reason for 64 questions is relative to "lugging" your engine .
You never stated the gear ratio or prop pitch. However,at 600 HP one might assume the ratio to be 1.68 gears w/a 28 or 29" prop for 11,000 #.
To be on the safe side,possible to run 87 octane from time to time knowingly or unknowingly and reduce risk of detination I would start at 16 -18 *and curve to 3500 RPM for "all in" 34*
You never stated the gear ratio or prop pitch. However,at 600 HP one might assume the ratio to be 1.68 gears w/a 28 or 29" prop for 11,000 #.
To be on the safe side,possible to run 87 octane from time to time knowingly or unknowingly and reduce risk of detination I would start at 16 -18 *and curve to 3500 RPM for "all in" 34*
I was thinking 3500 for all in also, but a couple local guys were telling me to have it all in before boat got on plane.
Right now boat planes right at 2500-2800. This will change obviously with tuned engines and bigger props.
#15
Gold Member
Gold Member
Join Date: May 2002
Location: DFW
Posts: 1,127
Likes: 0
Received 0 Likes
on
0 Posts
Your local guys may have a good idea ........What do I say ..
Incidently, a 28 " prop w/1.68 gears = 17.26 and your 26 "w/1.50 = 17.33 .....both combinations are very similar....Some feel a 30" prop is Beta and work from there.
Last,my suggestion encompassed working with a big bore,thin wall stroker 9.8 block w/oval heads .
Good Luck !
Incidently, a 28 " prop w/1.68 gears = 17.26 and your 26 "w/1.50 = 17.33 .....both combinations are very similar....Some feel a 30" prop is Beta and work from there.
Last,my suggestion encompassed working with a big bore,thin wall stroker 9.8 block w/oval heads .
Good Luck !
#16
Registered
Platinum Member
Thread Starter
Your local guys may have a good idea ........What do I say ..
Incidently, a 28 " prop w/1.68 gears = 17.26 and your 26 "w/1.50 = 17.33 .....both combinations are very similar....Some feel a 30" prop is Beta and work from there.
Last,my suggestion encompassed working with a big bore,thin wall stroker 9.8 block w/oval heads .
Good Luck !
Incidently, a 28 " prop w/1.68 gears = 17.26 and your 26 "w/1.50 = 17.33 .....both combinations are very similar....Some feel a 30" prop is Beta and work from there.
Last,my suggestion encompassed working with a big bore,thin wall stroker 9.8 block w/oval heads .
Good Luck !
Thread
Thread Starter
Forum
Replies
Last Post
rob 221 lib man
Fiberglass and Paint
7
08-09-2007 10:43 PM