420cc torque build for quad, $1500 budget

[Masonisgreat35]

i got a brand new electric start 420cc motor for $200 and a quad frame for $50, the frame was too small to fit motor so im in the middle of stretching it 8-10inch directly in the middle of the frame, ill include a pic for visual if interested

question is how would you guys build it for $1500 with torque in mind, i know it will already have alot since its a bigblock but more cant hurt i would think, and would be fun

thanks for any ideas they wud be highly appreciated!

 

[Denny]

I would run it right out of the box stock. Then worry about what you may need. You are going with a 40 series CVT, right?

 

[Masonisgreat35]

I would run it right out of the box stock. Then worry about what you may need. You are going with a 40 series CVT, right?

Yeah a torque converter would be the plan but im for sure tearing it down and putting billet rod, higher lb springs, big cam, and whatever else but just wondering how other would build theres

 

[BrownStainRacing]

Yeah a torque converter would be the plan but im for sure tearing it down and putting billet rod, higher lb springs, big cam, and whatever else but just wondering how other would build theres

Run it stock 1st.
Big blocks don't need to run more then 4500 rpm when it's got the right tune.

Power to weight ratio is gonna be ridiculous with that frame.

Life insurance up to date ?????

 

[Masonisgreat35]

Run it stock 1st.
Big blocks don't need to run more then 4500 rpm when it's got the right tune.

Power to weight ratio is gonna be ridiculous with that frame.

Life insurance up to date ?????

i was thinking running it stock originally but no clue how to hookup those governor linkages i got this motor with half of it looks like

the power to weight ratio is the idea lmao its gonna be wild for sure but thats the plan, i want this quad as wild as possible with tons of torque
its 13hp stock i believe but would be cool to get that around 20-25 im gonna put together a list of parts and let me know what you think of it if u can
thanks

 

[Masonisgreat35]

some of these prices may be usd and some cad im not sure, but ill worry about that when ordering

a rough list for an idea of the plan, i might try to find some roller rockers that dont increase lift as the cam is already juicy

no idea what id go with for a carb yet
i might go with a normal length rod instead

may be missing some stuff in the list but ill be adding/changing it as i go

what are your guys thoughts on this build?


$216 ARC 6774 Honda GX340/390 4.51" Billet Rod (+100")

$338 ARC 6693-E GX390 UT2 Electric Start Billet Flywheel (275-GX390-TSB) (reason for the flywheel is i think i can choose to use either the 4500 limiting coil or a non limiting coil, as im not sure what id go with)

$128 ARC 6693-RGK Honda GX390 Ring Gear Kit (6693-RGK)

$200 dynocams 275 Grind, Tool Steel Billet, Clone 13HP (275-GX390-TSB)

$24 nrracing Piston, 90mm Flat-Top for 420cc Hemi Predator (420PISTONKIT-HEMI) (says hemi but should work with non hemi fine, i may find a regular flatop instead though)

$258 nrracing Head, Racing; GX390, 420cc, & 460cc; Aftermarket Core (36mm/31mm valves single springs alum retainer, not milled) (HEAD-RACING-390-CLONE)

$57 ARC DJ-3146 ARC Top Plate/Throttle Assy, GX270-GX390 (DJ-3146)

$34 dynocams PushRod Kit, 7"x .250" (CL-4750)

$129 Rocker Arms, Roller, Shaft Mounted, Billet Steel, GX390 1.2ratio (NRROCK-SM390)

$17 evil energy check valves x2

$19 dynocams filter adapter, clone 13hp (CL-2552)

$37 dynocams Rapp 1.250 Pipe, GX390 (RF-GX390-1250)

 

[BrownStainRacing]

That cam don't have a compression release. It's gonna be hard on a factory style starter.

I got buddy that plays with the big blocks. Big CR, big head and carb methanol drag race motors, he uses a starter box to get em to fire off with those non compression release cams.

I promise you.....you will not be pull starting it,

 

[Masonisgreat35]

That cam don't have a compression release. It's gonna be hard on a factory style starter.

I got buddy that plays with the big blocks. Big CR, big head and carb methanol drag race motors, he uses a starter box to get em to fire off with those non compression release cams.

I promise you.....you will not be pull starting it,

i dident even notice it had no compression release lmao ya no for sure ill be getting a cam with a release, prob still around same lift and duration if i can find similar

 

[BrownStainRacing]

i dident even notice it had no compression release lmao ya no for sure ill be getting a cam with a release, prob still around same lift and duration if i can find similar

This will probably save you some time, headaches, and a bunch of money.

It'll be more then you will want or need.

Dover Power don't built junk.
The description has a nice parts list for back yard builder to follow.

DiY Performance Production Outlaw Engine, Approx 17hp & 7500 RPM's | eBay

The Standard Production 17 engine design will produce approx 17hp and a safe Max RPM of 7500 / 212cc engine. > Performance Ignition Coil, Retard & Resistor Free (Better Acceleration). Exclusive DiY Performance Production Built High Performance Engines.

www.ebay.com

 

[Masonisgreat35]

This will probably save you some time, headaches, and a bunch of money.

It'll be more then you will want or need.

Dover Power don't built junk.
The description has a nice parts list for back yard builder to follow.

DiY Performance Production Outlaw Engine, Approx 17hp & 7500 RPM's | eBay

The Standard Production 17 engine design will produce approx 17hp and a safe Max RPM of 7500 / 212cc engine. > Performance Ignition Coil, Retard & Resistor Free (Better Acceleration). Exclusive DiY Performance Production Built High Performance Engines.

www.ebay.com

not worried about time, money sure, always nice to save lol thats a nice lookin motor but ive already cut the frame so ill be putting a bigblock for sure, future though if i need a smallblock those look great though

edit i forgot to mention i already have the steel mounting plate for gx390s and a gx390 billet motor adjustment plate to bolt to that

 

[Masonisgreat35]

This will probably save you some time, headaches, and a bunch of money.

It'll be more then you will want or need.

Dover Power don't built junk.
The description has a nice parts list for back yard builder to follow.

DiY Performance Production Outlaw Engine, Approx 17hp & 7500 RPM's | eBay

The Standard Production 17 engine design will produce approx 17hp and a safe Max RPM of 7500 / 212cc engine. > Performance Ignition Coil, Retard & Resistor Free (Better Acceleration). Exclusive DiY Performance Production Built High Performance Engines.

www.ebay.com

how come that motor u sent has a fuel pump, is it just incase ur tank isent in a good location for gravity feed?

 

[BrownStainRacing]

how come that motor u sent has a fuel pump, is it just incase ur tank isent in a good location for gravity feed?

Outlaw racing modified engine.

Jerry has no idea what chassis, track, weight, stagger, mini bike, gokart, drag racin, hill climbin, mud hole stompin, backyard fun time toy its going in.....or any other class this engine is gonna be used for, so he throws in the fuel pump for basically free, jus cas he's know........it's gonna fit YOUR needs.

Jus give him a call, you might learn a thing or 2 about these junky ol "turd motor" small blocks.