Re: 454 dynoed
 

Pelle--My advice? When rmbuilder speaks-- Listen! It's good to hear from Bob again.--Lou

Re: 454 dynoed
 

"Suggestions to get 1-2mph more?"

Have your prop labbed. couled get you 150-200 more rpm.

Re: 454 dynoed
 

New dyno results, after few changes:

487hp@5400rpm
550ft/lbs@3300

Dyno test ran with Stainless Marine manifolds vs.
last year that was run with dyno headers. Other
changes: Crane -731 cam, Air-Gap intake & BG850dp
carb. Engine ran up to 4500rpm within last years
result and took it from there on. Considering exhaust
differences, headers vs. manifolds, I think it must be
10 to 20hp more all the way...?



New engine dynoed on tuesday, and the results are;

445hp@4600rpm - 447hp@5500rpm,
544ft/lbs@3500rpm w/over 500ft/lbs
from 2500rpm-4500rpm,

Very pleased to the results, considering, that cam
is very small; crane´s 278/290 0.529"/0.525".
Dyno run was made w/BG 750dp on RPM Q-jet manifold,
32` total advance at 3750rpm w/24´T-Bolt ignition box.
Question is; should I run w/750, or 850 carb, as it seems
that engine might use some more cfm`s,as the power
stays flat for almost 1000 rpm`s?

750 or 850?[/QUOTE]

Re: 454 dynoed
 

sounds like a great setup!!! interesting to see the changes you made since last year.....did you ever check the vac press as RMbuilder suggested? just wonder the outcome? as im considering the same thing.
kevin

Re: 454 dynoed
 

Pelle,

Nice work---congrats! For what you have done to your 330(s) you have gotten a pretty decent power gain. You can get more out of the engine(s), but for what you have so far, I certainly wouldn't be disappointed at all. Have fun!

Re: 454 dynoed
 

,merc 454 mag 365 horse came wiht 650 cfm carb, i run a 750 demon on a 454 mag wiht 475 horse, a 750 shoudl be enuf

Re: 454 dynoed
 

run better w 850...

Re: 454 dynoed
 

The weber's on 454mags were 750cfm carbs. Not sure on the Q jets.