460 mud racing motor

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460 mud racing motor

Post  bigben on December 3rd 2015, 9:48 am

Was gunna go nitrous small block an than realized that just wouldn't be enough
So plan is
93 fuel inj truck motor I already have
Set of dove c heads home port with scj size valves
Torker2 intake
Cam?? Need to pull 16inch of vac at 800-1000rpm
Pistons thinking forged flat tops like 10.5-1 comp
Stock crank and rods with arp bolts
750 quick fuel q series dp
Oh and I got a nx hit man nitrous plate kit I wanna use for another class
All going threw a c6 with a 1356 in a 29-3200lb ranger bodies f150 frame
Any advice or suggestions id love to hear

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Re: 460 mud racing motor

Post  schmitty on December 4th 2015, 1:07 pm

If you are buying pistons, get a 4.5" crank and good H or I beam rods and make a 545"-557" deal. With a 4.5" crank and flat tops you will be about 13.?:1 C/R depending on chamber CC's.
750 carb is way too small, find a 1050 Quick fuel Dominator.
H or I beam aftermarket rods are cheap, don't waste time on the OE rods.
If single plane intake is allowed, probably a Victor, or better yet TFS Mafia.
The C6 and 1356 is a strong combo, buddy is running it behind his 477" deal with great results.
What tire size, and what kind of pits are you going to run in, and length?
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Re: 460 mud racing motor

Post  rmcomprandy on December 4th 2015, 3:23 pm

bigben wrote:Was gunna go nitrous small block an than realized that just wouldn't be enough
So plan is
93 fuel inj truck motor I already have
Set of dove c heads  home port with scj size valves
Torker2 intake
Cam?? Need to pull 16inch of vac at 800-1000rpm
Pistons thinking forged flat tops like 10.5-1 comp
Stock crank and rods with arp bolts
750 quick fuel q series dp
Oh and I got a nx hit man nitrous plate kit I wanna use for another class
All going threw a c6 with a 1356 in a 29-3200lb ranger bodies f150 frame
Any advice or suggestions id love to hear

Some simple things to realize;
1. Compression is what you need in a "vacuum" engine to use the biggest cam possible for the most torque & horsepower.
2. the bigger the engine and it WILL make more torque but, ALSO ... the easier it is to get to that high compression ratio with a flat-top piston and be able to legally use that camshaft needed.
3. A vacuum advance mechanism WILL attain more vacuum to use a larger cam yet and get even more power.

If you just wish to play around then so be it but, if you intend to win then do whatever things are necessary within what you are allowed to do.

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Re: 460 mud racing motor

Post  bigben on December 4th 2015, 5:55 pm

Running 38.5 12-15 fronts 38.5-15-15 rears cut bogger rear tsl front
Are pits are 150-200ft with anywhere from 12-18 inch mud with some what of a base
Side by side timed racing
I'd love to build a Stroker but just don't have the cash this season
Question why is the 750 to small I did the cfm calc and put it in my desktop dyno program which I'm by no means saying is perfect but I'd hope it's within 50hp and it averages out to like 505 I believe peaking at 580 something with an off the shelf solid roller comp mud racing cam that idk if it will pull vac with

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Re: 460 mud racing motor

Post  bigben on December 4th 2015, 5:59 pm

I don't have to run flat tops I haven't purchased Pistons yet.
This may sound dumb but what are you meaning by vac advance device ? A vac advance distributer ??
Sorry if that's a dumb question

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Re: 460 mud racing motor

Post  rmcomprandy on December 4th 2015, 6:18 pm

bigben wrote:I don't have to run flat tops I haven't purchased Pistons yet.
This may sound dumb but what are you meaning by vac advance device ? A vac advance distributer ??
Sorry if that's a dumb question

YES ... have a distributor which will OVER advance ignition timing more ONLY at Idle and Part Throttle operation of the carburetor; (to return to just regular mechanical ignition advance at Wide Open Throttle).

In any case, small or larger engine, run the compression ratio as high as you can legally have it.

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Re: 460 mud racing motor

Post  bigben on December 4th 2015, 6:30 pm

Ok that's kinda what I thought you meant.as for compression I can go as high as I want just can't run alky

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Re: 460 mud racing motor

Post  schmitty on December 7th 2015, 6:29 pm

It's going to be expensive to build either way, stock stroke, or 4.5". Pistons, and rods are pretty much the same either way. The cranks aren't that much, get the money and do it once. Compression ratio and cubic inches will affect how much cam you can use and still pull vacuum so make the most with it one time and be done. Between cubes and C/R, you could add as much as 30* more cam duration.
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Re: 460 mud racing motor

Post  bigben on December 7th 2015, 6:53 pm

ya i know it wont be cheapest thing in the world oddly enough i just threw a trade offer in on a 557 rotating kit last night so we will see how it goes.
either way im thinking a custom cut cam from lem,bullet maybe comp is what ill be doing , id still love to ave an all iron "little 466 beating on the big ci aluminum headed motors i run with ive been trying to get the part together for this for the last 3 years

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Re: 460 mud racing motor

Post  bigben on December 11th 2015, 1:22 pm

well the first 557 i found fell threw.. traded a guy my 750 quick fuel for a 1050 dominator so i should have plenty carb. only crappy part is my 4150 hitman plate wont work so now im on the hunt for new 4500 plateor a fogger..

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Re: 460 mud racing motor

Post  bigben on December 15th 2015, 9:20 am

wow still some stand up guys shipped my carb down Mississippi way and he sent me a 1050 dominator back swaped the torker2 intake for a victor a buddy had now im sittin on a pie of odd parts im tryin to trade off for more 460 parts till after Christmas when I can start spendin $ again

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