SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: enginedoctor on September 15, 2009, 03:50:24 PM
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Latest racing engine build : CHRYSLER 542 Hemi
Pic's to follow.. Goal is 850bhp on pump gas , naturally aspirated :thumbup: no nitrous :thumbdown:
Boat should book ;D
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Sounds like a respectable goal. I'm shooting for the same HP numbers from a 512 RB block on race gas. Make sure you point out any little Mopar tricks to make them last longer. Always eager to learn.
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Hell yea! I'm guessing the word "Indy" is in your future ;D
Is it someone on the boards?
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Hell yea! I'm guessing the word "Indy" is in your future ;D
Is it someone on the boards?
hey Tony... Indy huh? Sht if so please join me! :thumbup:
And no... Just an old customer ;D
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http://www.indyheads.com/
Get some pics!
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Thank's Tony ...!
Great info :)
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Hemi update :
Here is why u should not over rev. your power plant :screwy:
This guy spends $20 K. on this thing.... built by a famous builder with a good rep. Anyhay this is what followed.
1. This virtually had one day of running time.
2. #5 piston absolutely destroyed.... # 5 intake valve snapped off at the keeper groove location.
3. The cause of failure.... Over rev'd, piston up and hits valve,then tears the keeper/valve apart ...duh :sly:
20K...down the drain.
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or were the parts in the motor not worthy of the rpm ???
titanium valves, retainers ???
pro stock reving 10k plus, but, built for it
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Why wasn't the insurance policy turned on? REV LIMITER :banghead:
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A guy the other week did that, had a stout BBC, with a panther pump.... didn't know when to lift the throttle... 8000 rpm is crazy :screwy:
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or were the parts in the motor not worthy of the rpm ???
titanium valves, retainers ???
pro stock reving 10k plus, but, built for it
Ya guy's....Undesireable parts/ no rev. limiter :thumbdown :thumbdown
It's ok>....Me fix it :)
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http://www.indyheads.com/
Get some pics!
Ralph has my camera :sly:
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so doc are you a mopar type guy or just building this one because that's what the customer wants?
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Nah hes a guy that will build them all :thumbup:
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Huh?
There must have been valve float going on. The Hemi bottom end is WAYYYY stronger that anything else out there. Because a hemi has the valves opening into each other on opposing sides of the engine, any valve float will kill it. Don't skimp on the valve springs.
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Huh?
There must have been valve float going on. The Hemi bottom end is WAYYYY stronger that anything else out there. Because a hemi has the valves opening into each other on opposing sides of the engine, any valve float will kill it. Don't skimp on the valve springs.
Valve Springs checked out Ok..... Is valve float / Over revving not the same thing ;D
Let me know your up onion :thumbup:
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Over reving can also snap parts unrelated to the valvetrain. ;D
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Over reving can also snap parts unrelated to the valvetrain. ;D
I agree....And it is always ugly >:D
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Were they Manley valves from U.S.A or the stuff from Argentinean, Bead lock or square lock,
or whos valves? Did it break at top of lock grove or bottom, We just bent five
valves 8500 alc 410 sbc broke two rods took block out valves bent but didnt break
or kill the head these were 49cc heads 2.050 valves I.M.C.A Mod car 20m KS
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They broke at the bottom of lock grooves & they were Manley.
OVER REV. PERIOD .
Can't name the cyl. head manufacturer for obvious reasons :sly:
By the way ... I am from ARGENTINA :screwy:
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You do no that Manley valves are now made in Argentina good or not I dont no
but a lot valves were made down there in years past :banghead:
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You do no that Manley valves are now made in Argentina good or not I dont no
but a lot valves were made down there in years past :banghead:
Why are you upset... I did not make the valves" Hot Shot " :thumbdown:
From an engineering standpoint.... :thumbdown:
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This Guy was running a blower on this thing too.... :sly: (He never mentioned that till today 871 )
Engine failure caused by :
1. Fuel Wash
2. Valve Float
at least all the parts were shined by gasoline :screwy: