468 build
#11
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Joined: Nov 2004
Posts: 14,100
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From: On A Dirt Floor
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.
Also, the LSA is a little wide at 114. 112 would fare better power and rpm band wise.
#12
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.
#13
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Joined: Dec 2010
Posts: 783
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From: Chestertown, MD
9.5:1 454 GEN VI Using Merlin 1043-C heads. 310CC, 119cc, 2.300 Intakes, 1,88 Exhaust Heavy but in marine world I was building for longevity with Matching Merlin intake with Brass Water Jackets. 800 Holley from HP500, 168731 Crane Cam 226/236 .587 / .610 112*
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.
Agreed, I built this engine with possible intent of selling so didn't want to go too big. For reliability I like the Smaller 500EFI or 731 for 454's and 741 or 525EFI's for 502+ Ci.
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.
Agreed, I built this engine with possible intent of selling so didn't want to go too big. For reliability I like the Smaller 500EFI or 731 for 454's and 741 or 525EFI's for 502+ Ci.
Last edited by KRAUSMOTORSPORTS; 05-21-2020 at 12:32 PM.
#14
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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?
#15
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From: St. Pete Beach, FL
What intake?
#17
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From: St. Pete Beach, FL
#18
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From: Chestertown, MD
#19
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Joined: Jan 2009
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I’m really leaning towards the 525efi cam if I can’t find something on a 112... it’s for 1979 glastron Carlson cv23 that I’m restoring... floor stringers, transom all done, onto the test rigging phase and a lot of custom work to get want I want...


