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Old 02-09-2013, 12:02 PM
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406

Hello everyone ,
This is my first post and could use some info .Problem is my arp studs that I have coated with arp thred sealer durning the build are leaking (only distelled h20 no antifreeze )after start up .I did not see any leaks after first run only 5 min.After second run up to temp around 150 leaks of water out of lower head bolts So i pressure tested it to 10 lbs and almost all leaked .Why WHY WHY

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Old 02-09-2013, 01:33 PM
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what was the torque set at when you built the engine?
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Old 02-09-2013, 02:49 PM
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Did you chase and clean the threads in the block prior to installation?
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Old 02-09-2013, 03:44 PM
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Thank u for a respond ,I followed the arp install instruk of three eq steps to 80 ft lbs.
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Old 02-09-2013, 03:45 PM
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I did and so did the machine shop
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Old 02-09-2013, 04:10 PM
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IDK maybe i just didnt use enough .I dont think i went crazy with the stuff just enough to cover the stud threads 50% maybe .the build started back in march piece by piece as i could afford parts .Today I am rebuilding the 4160 carbs .
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Old 02-10-2013, 12:14 AM
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thanx for the tip i agree .So do u think i would most likely have the same water problem with my dart shp rocker arm studs ?
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Old 02-10-2013, 12:50 AM
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Originally Posted by macrobert68 View Post
thanx for the tip i agree .So do u think i would most likely have the same water problem with my dart shp rocker arm studs ?
I use Permatex #2 in the tube. Permatex Aviation p/n 80019 in the bottle will work too.
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Old 02-10-2013, 11:06 AM
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I like this forum very helpful.Here is a question for all u
hotroders out there
What are the thoughts of the amount of hp and compression from this build?


1974 400 block machine shop to .030 over >406
line bored shop balanced on newest machine
(shop tells me its the newest ballancer on the market )
castcrank
(now i wish i would of went forged)
flat top pistons with two releif cuts
mahle rings
howard cam .555/298/308/110hyd roller
crane roller rockers (gold pro race 1.5)
dart shp 202/180 72cc on stock deck height
comtiec gasket compressed 0.30
weiand tunnel ram with twin 4160 450 cfm carbs
holly hp mech fp 110gph
msd plug and play msd wires msd coil
Super Competition, Full-Length, Steel, Ceramic Coated, Chevy Headers
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Old 02-10-2013, 11:10 AM
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Ill be in the garage today rebuilding my second holly today so i wll check back later thanx everyone.
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Old 02-10-2013, 03:52 PM
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Using the right springs and heads that cam will make power to about 6,500, and you will need some stall if it's an automatic.

Poser girlie-man motor?? Now that's funny...
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Old 02-10-2013, 03:54 PM
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Fbirds right about the carbs. I don't have time to do the math but I'd bet the compression will be low for the cam.
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Old 02-11-2013, 07:24 AM
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Quote:
Originally Posted by macrobert68 View Post
I like this forum very helpful.Here is a question for all u
hotroders out there
What are the thoughts of the amount of hp and compression from this build?


1974 400 block machine shop to .030 over >406
line bored shop balanced on newest machine
(shop tells me its the newest ballancer on the market )
castcrank
(now i wish i would of went forged)
flat top pistons with two releif cuts
mahle rings
howard cam .555/298/308/110hyd roller
crane roller rockers (gold pro race 1.5)
dart shp 202/180 72cc on stock deck height
comtiec gasket compressed 0.30
weiand tunnel ram with twin 4160 450 cfm carbs
holly hp mech fp 110gph
msd plug and play msd wires msd coil
Super Competition, Full-Length, Steel, Ceramic Coated, Chevy Headers
Don't see that cam here: Chevrolet V8 262-400 (non-OE hydraulic roller) 1957-1996

Static CR is around 10.3, but my concern is if the block hasn't been decked, the quench distance is ~0.055".

Fill in the blanks and a guess could be made.
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Old 02-11-2013, 09:38 PM
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2800 stall in th400 unsure what rear end to use .I was thinking gm 12 bolt 410
What do u think? Mostly street car some track time gotta find out what it will do
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Old 02-11-2013, 09:48 PM
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howard cam number
110355-10
i

Last edited by macrobert68; 02-11-2013 at 10:05 PM.
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