BIG BLOCK FORD
Would you like to react to this message? Create an account in a few clicks or log in to continue.

Dump Truck Power

+4
schmitty
D. Sea
dfree383
rmcomprandy
8 posters

Go down

Dump Truck Power Empty Dump Truck Power

Post  rmcomprandy June 16th 2014, 11:26 am

A friend of my brother's has an excavating company and one of his dump trucks threw a rod. He was most concerned with getting that dumper back in service but, also interested in having a bit more torque as long as the gasoline usage would stay about the same.
It was a 370 and we used a weird set of parts to get to the final 429 cubic inches; 4.078" bore x 4.100" stroke.

It had hydraulic brakes so it had no air compressor. We felt we didn't need to use the big snout truck crankshaft.

1, An "offset ground" production 460 crankshaft stroked to 4.100" with a Pontiac throw diameter.
2. The guy is a Pontiac enthusiast so he had a set of almost new Pontiac connecting rods
3. Replacement "press-fit" forged pistons for an Oldsmobile 350 - #L-2412F-20
4. A custom ground hyd. camshaft - 205/210@.050" - .495" valve lift on both sides - 112 separation.
5. A good 45 degree valve job on the stock small valved 370 heads with new OEM production valve springs.

everything else went back together just as it came apart except for the 460 Damper & sleeve.

It has been in service now for about a month and he says that fuel consumption is almost 10% less and the increased torque is noticeable enough that his drivers have a debate every morning about who gets to use that truck.

rmcomprandy

Posts : 6160
Join date : 2008-12-02
Location : Roseville, Michigan

http://www.rmcompetition.com

Back to top Go down

Dump Truck Power Empty Re: Dump Truck Power

Post  dfree383 June 16th 2014, 11:32 am

Cool
dfree383
dfree383
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 14853
Join date : 2009-07-09
Location : Home Wif Da Wife.....

Back to top Go down

Dump Truck Power Empty Re: Dump Truck Power

Post  D. Sea June 16th 2014, 12:04 pm

Nice!

Need you to do the same for my F350  
Mostly the 10% less fuel usage while towing Razz 
D. Sea
D. Sea

Posts : 2768
Join date : 2008-12-02
Age : 55
Location : Kentucky

Back to top Go down

Dump Truck Power Empty Re: Dump Truck Power

Post  schmitty June 16th 2014, 2:35 pm

I doubt that anyone else could have even come close to that parts list.  Way to go and think way out of the box.   Very Happy
schmitty
schmitty

Posts : 4538
Join date : 2008-12-02
Age : 54
Location : Holdrege, NE

Back to top Go down

Dump Truck Power Empty Re: Dump Truck Power

Post  bbf-falcon June 16th 2014, 3:20 pm

There are engine builders that put engines together from everyone elses hard work,then there are the ones that think completely out of the box. You are the latter. Good job Randy. Wink 

bbf-falcon

Posts : 8995
Join date : 2008-12-03
Location : Jackson, Ohio

Back to top Go down

Dump Truck Power Empty Re: Dump Truck Power

Post  crittersf1 June 16th 2014, 3:40 pm

Way to go Randy.
crittersf1
crittersf1

Posts : 521
Join date : 2009-10-28

Back to top Go down

Dump Truck Power Empty Re: Dump Truck Power

Post  5pointslow June 17th 2014, 12:46 pm

ingenuity at its finest Cool
5pointslow
5pointslow

Posts : 1408
Join date : 2009-10-11
Age : 35
Location : MASSHOLE aka BOSTONIAN

Back to top Go down

Dump Truck Power Empty Re: Dump Truck Power

Post  rmcomprandy June 18th 2014, 1:05 pm

Thanks for the nice words guys.
I wanted to install a bit larger intake valves because the stock ones are only 1.780" in diameter with a 3/8" stem but, now I am glad I didn't.

I do want to say that this is how things were done 40 or so years ago.  Before the times where you could buy everything and had to make other stuff work.  Wink

rmcomprandy

Posts : 6160
Join date : 2008-12-02
Location : Roseville, Michigan

http://www.rmcompetition.com

Back to top Go down

Dump Truck Power Empty Re: Dump Truck Power

Post  bbf-falcon June 18th 2014, 9:29 pm

Thats true. About 20 yrs. ago when I first switched from the FE stuff,I ran into a guy that had a set of pistons that he had taken out of one of his 385 series builds. When he told me they had been used w/440 Mopar rods,I started asking ???'s. He was a smart ole dude and knew how to make things work. Cool 

bbf-falcon

Posts : 8995
Join date : 2008-12-03
Location : Jackson, Ohio

Back to top Go down

Dump Truck Power Empty Re: Dump Truck Power

Post  DILLIGASDAVE June 19th 2014, 2:26 am

How much of the mileage improvement could have been from it being a fresh build, or the bigger cubic inch getting the same work done with less throttle than before?
DILLIGASDAVE
DILLIGASDAVE

Posts : 2262
Join date : 2009-08-08
Location : Texas. pronounced "texASS"

Back to top Go down

Dump Truck Power Empty Re: Dump Truck Power

Post  rmcomprandy June 21st 2014, 11:50 am

DILLIGASDAVE wrote:How much of the mileage improvement could have been from it being a fresh build, or the bigger cubic inch getting the same work done with less throttle than before?

I think that being fresh certainly might have been part of it however, I am told that truck when loaded is at Wide Open Throttle a lot. Driving away from traffic lights and such in city traffic; (although it did have a governor type carburetor on it).

I am just glad it all worked well and the outcome was a thing to make him happy.

rmcomprandy

Posts : 6160
Join date : 2008-12-02
Location : Roseville, Michigan

http://www.rmcompetition.com

Back to top Go down

Dump Truck Power Empty Re: Dump Truck Power

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum