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-   -   540 build cam selection with gil exhaust (https://www.offshoreonly.com/forums/general-q/346850-540-build-cam-selection-gil-exhaust.html)

getrdunn 05-11-2017 08:55 PM


Originally Posted by Jamsf1984 (Post 4553434)
Its has a bravo 1 with hydraulic steering it was originally an hp500 carb

do you have a copy of the cam card by chance. Personally I'd use it and not look back. How I got away with cams used years ago without reversion is beyond me. One bad choice but was during the marine learning builds nearly 30 yrs ago and cam was on a 108.

getrdunn 05-11-2017 09:05 PM

You can always swap out to dry pipes and cheer some blow boaters up. Hah. You'll be fine. Is that a custom grind or Howard's by chance? Specs don't sound familiar. Just curious.....

Jamsf1984 05-11-2017 09:57 PM

Its a comp custom grind i called and they said this 239,247 .643, .653 on 112 the nice part is the price is 337.00 cause its a common blank, ive also been recommended the crane 168741 236,244 .610, .632 on 112, 540 tahoe what type of steel heads and what compression im looking at 10:1 or 9.6:1

Jamsf1984 05-11-2017 09:58 PM

What type of steel head, compression, and what rpm was the peaks thanks

ICDEDPPL 05-11-2017 10:04 PM

A 265 head, 228/234 cam for a 540? Holy $hit.
You guys are nuts, but I guess if it just laying around why not right.(sarcasm) While you`re at it maybe you have a carb laying around ,maybe from like an old lawnmower or something. It`ll be perfect for this build.:D

Tahoe540 05-11-2017 10:06 PM


Originally Posted by Jamsf1984 (Post 4553478)
What type of steel head, compression, and what rpm was the peaks thanks

The heads are 088 with slight port and bowl work, 10.5:1
Cam specs are 631 both sides and duration is 252 on both sides as well on a 113
http://i393.photobucket.com/albums/p...psaynqua8k.jpg

Jamsf1984 05-11-2017 10:15 PM

Thats nice power with the 088, i may be looking close to that i have a bit less compression the cam will be smaller but the afr 265 flow way better than a stock 088 especially on exhaust side and low lift areas but yours are cleaned up some thanks alotfor the help

SB 05-11-2017 10:20 PM


Originally Posted by Jamsf1984 (Post 4553476)
Its a comp custom grind i called and they said this 239,247 .643, .653 on 112 the nice part is the price is 337.00 cause its a common blank, ive also been recommended the crane 168741 236,244 .610, .632 on 112, 540 tahoe what type of steel heads and what compression im looking at 10:1 or 9.6:1

$337.00 for a Comp is typically a cast iron core. Be careful and always question and then follow up and make sure their answers are correct.

Jamsf1984 05-12-2017 10:33 AM

Does anyone have any ideas on hp and torque or maybe a better cam selection to spin it 5500-5800

Eliminated572 05-12-2017 10:50 AM

Those 265's will fall off early IMO. Id expect to see 5200-5300 unless you let it breath better. If that's the head you must use, match the parts. Trying to over cam a smaller head will disappoint you.


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