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525EFI cam is Getting up their in duration. 236 at .050, therefore in a 454 you’ll want near 10:1 compression.
Also, the LSA is a little wide at 114. 112 would fare better power and rpm band wise. |
Originally Posted by picca00
(Post 4739834)
Rookie are you running dry exhaust? What’s that max lift you can get away with staying with reasonable compression?
My other built 454's currently have 235°/241° 0.684"/0.665" (rocker 1.8,1.75) LSA 113, 9.0:1 with custom Dart Pro1 heads and CMI E-Top that are dry 3/4 to the transom. These use to have 252°/264° 0.668"/0.668" @ 9.7:1 with the dry to the tip Stainless Marine exhaust. |
Originally Posted by picca00
(Post 4739903)
what heads did you use and what’s the approx hp?
I'm guessing around 500hp ish. I run 93 in all my engines so I tend to lean towards higher compression then most. Contemplating on taking it to the dyno just to proove itslef. I'm may be selling this engine soon. If I did run this I have Stellings Full Dry Exhaust to Tip exhaust.
Originally Posted by SB
(Post 4739905)
The 731 is a tad smaller than the 500EFI cam. (226 vs 230 int duration at .050”)
Still a good choice for many 454/502 builds. |
Ok thanks guys, I figured the 112 would be better, but in general if I go with the bigger 525 cam, I will just need a little more compression and spin more rpms? I only run 93 octane so 9.5-9.7 compression should be ok and possibly still make the power just under 6k?
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Originally Posted by picca00
(Post 4740148)
Ok thanks guys, I figured the 112 would be better, but in general if I go with the bigger 525 cam, I will just need a little more compression and spin more rpms? I only run 93 octane so 9.5-9.7 compression should be ok and possibly still make the power just under 6k?
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High rise intake most likely, I don’t know if a air gap would be enough...
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Originally Posted by picca00
(Post 4740284)
High rise intake most likely, I don’t know if a air gap would be enough...
What boat is those? |
Originally Posted by hogie roll
(Post 4740323)
The air gap is probably the best intake up 600ish. Which you may be flirting with depending on how much cam you use.
What boat is those? |
Originally Posted by hogie roll
(Post 4740323)
The air gap is probably the best intake up 600ish. Which you may be flirting with depending on how much cam you use.
What boat is those? |
So any more opinions on me putting the 525 efi cam in my 468 build? I thinks that’s my pick...
thanks for the input |
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