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macrobert68 02-09-2013 12:02 PM

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 :mad:

vinniekq2 02-09-2013 01:33 PM

what was the torque set at when you built the engine?

TMF Lindbeck 02-09-2013 02:49 PM

Did you chase and clean the threads in the block prior to installation?

macrobert68 02-09-2013 03:44 PM

406
 
Thank u for a respond ,I followed the arp install instruk of three eq steps to 80 ft lbs.

macrobert68 02-09-2013 03:45 PM

I did and so did the machine shop

macrobert68 02-09-2013 04:10 PM

406
 
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 .

macrobert68 02-10-2013 12:14 AM

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 ?

cobalt327 02-10-2013 12:50 AM

Quote:

Originally Posted by macrobert68 (Post 1644631)
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.

macrobert68 02-10-2013 11:06 AM

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

macrobert68 02-10-2013 11:10 AM

406
 
Ill be in the garage today rebuilding my second holly today so i wll check back later thanx everyone.

68NovaSS 02-10-2013 03:52 PM

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...

hpete 02-10-2013 03:54 PM

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.

cobalt327 02-11-2013 07:24 AM

Quote:

Originally Posted by macrobert68 (Post 1644748)
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.

macrobert68 02-11-2013 09:38 PM

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

macrobert68 02-11-2013 09:48 PM

howard cam number
110355-10
i


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