420 engine

[Ted Hamilton]

Bob Berlin can hook you up....or any local machine shop. For the big boys I'd get a 3/4" billet plate, map out the bolt holes, drill and tap, and then CNC mill (or manual) some out from the underside, leaving plenty of thick webbing to keep it rigid. Or try this:
https://www.bmikarts.com/Motor-Mount-Plate-INTEK-305-GX390-13HP-Predator_p_1126.html
..and another option:
https://www.ombwarehouse.com/billet-engine-adapter-plate-for-db30-to-big-block-8-13hp-engines.html

 

[Jim Moore]

I have looked at both of those plates but they are for the 390/420. 460 has more bolt spacing front to rear. Guess I will have to go the machine shop route. Just have them make a bigger version of the small block plate on my mount.

 

[rainman]

I have a VC 460 and cant find the engine mount plate to use on my ultramax mount. No luck getting in touch with vegas carts or bullfrog and they used to sell them.

It is very easy to make a plate or know someone who can.

 

[gillyiowa]

Heres a jackshaft set up we use on our 390/440 stroker. I also have a mikuni tm 33 alky carb if you need one

 

[flattop1]

Is that a s/s carb on there Dave ?

 

[gillyiowa]

Carrier performance 45/40

 

[IndyHarry]

EFI SC460. I've never heard of such an animal or if it can be tweaked.
https://www.senci.com/index.php?c=article&id=351

 

[taylorteamracing]

here is a 420 i built it has the big port Honda head, over sized valves, roller rockers, milled 100 thous, arc rod, adjustable billet flywheel, flat top piston, 307 cam, lifters, crankcase vent system on AN6 line, mikuni 33mm pumper carb, clutch ehh a noram star, I just completed the break in it runs strong hits hard don't know how competitive it will be the part supplier NR Racing suggest 35-40hp but in reality I don't know any thoughts 20 years ago i was sold on the old flat head stuff but seeing what's available now for the ohv stuff is pretty kool, the best thing out when i did it before was the animal and formula

 

[Compu-kart]

I have a VC 460 and cant find the engine mount plate to use on my ultramax mount. No luck getting in touch with vegas carts or bullfrog and they used to sell them.

I had my VC460 mount made at VP Racing Engines and Machines.

 

[Ted Hamilton]

I have 2 of the primary side j/s gears seen on the jackshaft above if someone needs 'em. 25t IIRC. They're from Junior Sprint setups originally.

 

[medusa51]

Mild "home built" GX390 on Methanol.

Open race April 15th 2009 @ Moran's Motorsports Park, Maysville, KY. Look for #79

1st heat

2nd heat

Feature

Brian #89

He can't pass clean so he Earnhardts he out of the way.