Official Duromax 440 Swap Thread

[KRAZYMATT]

Originally Posted by Stevop25

Wow, less than 24 hours the VC parts are in. There is a nipple on the carb adapter for the air filter. Can that be used for the pulse line?

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Yes they ship very quick. I am in florida so it usually always here next day unless it’s small order and they ship Usps. Did you see my message about the crankshaft. NR Racing has 5 of the 69mm stroker crankshafts sitting on their shelf if you wanted to make yours a 460 before u put it in the cart!

[Stevop25]

Can anyone confirm that the Duromax pushrods are 6.5” before I order?


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[raydhd]

They should be. That is the standard clone length.

[Stevop25]

Originally Posted by raydhd

They should be. That is the standard clone length.

Thank you, grabbing some from VC before the engine gets here.


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[raydhd]

The 6.5" are used on the stud mounted rocker arms and the 6.74" are for shaft mounted rockers. 2 Other notes 1) The HD valve springs 2) retainer that use valve lash caps on both intake and exhaust valves. That lash cap set up is on the VC 460 but some of the other clones it is not.

[Stevop25]

Originally Posted by raydhd

The 6.5" are used on the stud mounted rocker arms and the 6.74" are for shaft mounted rockers. 2 Other notes 1) The HD valve springs 2) retainer that use valve lash caps on both intake and exhaust valves. That lash cap set up is on the VC 460 but some of the other clones it is not.

Thank you I’ll take a look at it when it gets here.


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[Stevop25]

I’m planning on getting a 1.25 “U” bend to come off the head of the motor. After that would it be ok to run 1.5” pipe? The pipe bender I have access to only goes down to 1.5 pipe.


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[raydhd]

Most of the muffler inlets are 1.5 " so you should be good.

[KRAZYMATT]

I used 1-1/4 stainless PIPE. Bought pre bent pieces on eBay and welded it together. Muffler inlet was 1-1/2” so I got a short piece of 1-1/2” TUBING with 1-1/4” I’d and cut a 1 or 1-1/2” piece to make a adapter for the pipe to seal into the muffler and welded it up. Worked out very good.

[KRAZYMATT]

Remember: PIPE is measured off the ID, TUBING goes off OD!