454 dynoed
#13
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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]
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]
#14
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Join Date: Jul 2001
Location: Rockford, IL
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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
kevin
#18
Charter Member # 55
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Re: 454 dynoed
Originally Posted by 375stinger
,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
The weber's on 454mags were 750cfm carbs. Not sure on the Q jets.
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