Engine and Transmission Tech

tips, technology, tools and techniques related to vehicle driveline components

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quietone
Larry Mimbs
Tennille, Ga.
(93 posts)

Registered:
07/13/2013 04:22PM

Main British Car:


hardblok
Posted by: quietone
Date: October 12, 2014 08:39AM

Anyone have experience with Hardblok block filler? Seems like an excellent idea for highly stressed engines.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6468 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: hardblok
Posted by: BlownMGB-V8
Date: October 12, 2014 10:17AM

The drag racers use it quite a lot. But then, that bunch are also known to run without coolant. I'd have two concerns here, adequate cooling and eventual degradation and break-up of the filler.

Jim


britcars
Phil Ossinger
New Brunswick, Canada
(346 posts)

Registered:
02/02/2009 07:58PM

Main British Car:
1977 MGB Roadster, Rover 3.5 ADVENTURE BEFORE DEMENTIA!

authors avatar
Re: hardblok
Posted by: britcars
Date: October 12, 2014 10:40PM

Helped a friend replace several sleeves and then treat an aluminum 440 Mopar block with Hardblok that had been stroked to 512 + inches a few years ago. Strictly an all out race engine. I can't see anyone every having any success in using it in a street engine as you would have major destruction after a few miles.


roverman
Art Gertz
Winchester, CA.
(3188 posts)

Registered:
04/24/2009 11:02AM

Main British Car:
74' Jensen Healy, 79 Huff. GT 1, 74 MGB Lotus 907,2L

Re: hardblok
Posted by: roverman
Date: October 14, 2014 12:35PM

I'm building an oem mopar 440 block, out to 540". Block is 60% Hardblock filled. I fully expect to use on the street/track days, for long periods of time. That being said, time will tell,(first time experience). This will likey make oil cooling, even more important. I have "heard" of many, using block partial fills, for street use. BYOB, but be wary. Cheers, roverman.


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