Box Stock

Help me build a fast non hemi

M

maknwar

New member
This will be a parking lot, suburban racer. I'm just looking to make a fast kart, and get my cherry popped on modified small engines. I know how to work on engines but have no idea what combos work when adding after market parts. I'm starting with a used non hemi but that's as far as I got. Arc flywheel, and governor removal is about all I can do without more planning. Is a used engine ok to start modding?

Anyone have a list of parts they can share that will make me have the best engine?
 
Thinking of going with a 308 or black mamba cam, arc rod +.020, hemi flat piston, 26# springs. I could milk the head down but I don't know what parts I would need to accomplish that. Good combo? Would a Dover holy Moses carb and pipe be a good choice?
 
Thinking I'll mill the head .040, put a Honda flat top piston with an arc +.020 rod in it. Will I need to do anything to the pushrods or valves? Upgrade rockers?
 
What head do you have? its stamped on the outside bottom if you have a rtc 6 thru 9 head your golden. Carb wise thats up to you but if you have no restrictions id go with a 22 to 24mm slide carb or stay with stock appearing built by a reputable carb guy like dover typically 390 carbs can be a pain to tune on gas . As for your cam 308 is a good cam you might need to grind inside of block for clearance purposes.
 
If ur in a parking lot keep it simple. Add a fly wheel, a nice carb, rod, 1-3 rockers and a flat top piston.. it'll be more then u think.. gear short like a 12-13 in the front and like 65 or so in the back... you get going too fast and it makes it hard to find places to go!
 
subbietjw said:
If ur in a parking lot keep it simple. Add a fly wheel, a nice carb, rod, 1-3 rockers and a flat top piston.. it'll be more then u think.. gear short like a 12-13 in the front and like 65 or so in the back... you get going too fast and it makes it hard to find places to go!
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So milling the head would be kinda over the top?
 
No but if ur going with a flat top and running pump gas you will have plenty of compression... my first parking lot kart was an old 196 blue motor with a 14cc head header and carb... it would cook in ur average parking lot! Max mph was around 40-45... but it's a parking lot 40mph is pretty quick!
 
I noticed the 308 cam says it is 34 btdc, but the arc flywheel is preset to 32 btdc. *Would this negate the cams true value?
 
maknwar said:
I noticed the 308 cam says it is 34 btdc, but the arc flywheel is preset to 32 btdc. *Would this negate the cams true value?
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Set the timing yourself or buy a key to get the 2 deg more timing. You wouldnt notice the difference if you left it at 32 though.
 
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