Jump to content
SAU Community

Nos And Pocket Bikes.....


Guest Mashrock
 Share

Recommended Posts

  • Replies 46
  • Created
  • Last Reply

Top Posters In This Topic

yeah i had a 49cc pocket bike with drilled out jets in the carby little pod fillter lighten flywheel racing reed valve took the top ring of the piston to drop the compreshion and made 1 of those electric turbos they sell on ebay had exspanshion chamber really high gearing had a little 12v motor bike battery bolted up to it so i could run the charger man and it went pretty hard hey had like heaps high gearing they had 1 of them speed things the council put on the side of the road around the corner from mine got clocked at 89k also running av gas

Edited by overboost
Link to comment
Share on other sites

I used to own a Polini racing pocket bike which i bought at an auction. Polini is the real stuff not the chinese stuff and man, this thing FLEW.

Rolling from 10km(id wheelie off the line/single gear), i would beat my mates 97 laser to 60km/h (topped out) by 2 lengths...haha...thats pretty fast for a little bike ey?

The reason a turbo kit wont work is because you need EFI, otherwise it just leans out like a bitch. UNLESS, you do what the guys on the nitro car scene do and use the boost pressure to increase fuel pressure, infact, that could actually work. Run a +ve pressure line from the turbo out to the fuel tank to increase the fuel pressure...hmmmm....!! Regardless you would need one SMALL SMALL assed turbo for a 50cc engine. Even a turbo off one of those 600cc cars would be too big. If you had the tools, manufacturing would be the way...

Nos will work no problems, but you will need to tune the thing into mega rich. This wont help the idle out but at least when you hit that button the a/f ratios will remain good...

The best idea would be

-Nos, used to spool the turbo

-Turbo increasing FP

-tuned rich to compensate for turbo and nos

Now that, i could see working.

Sounds like a fun little project really, but quite a lot of fabrication. Custom exhaust manifold, intake, carbby, etc.

BTW, the guy in sydney, i think they installed EFI.

Link to comment
Share on other sites

This is the bike i used to have, http://www.dcminimoto.com/910desmo42.htm

I sure do know how to richen up a carb, spent ages tuning my s**t for changes in weather. I never said you cant turbo a carby car, i am talking about small capacity pocket bike engines.

Tuning a carb is quite difficult on its own, without forced induction. The biggest issue i see with tuning a small capacity carby turbo engine is the turbo lag. The bitch just wouldnt spool up fast enough before the mega rich mixture at high rpms (adjusted for full boost) will cause it to bog down and underperform.

This was discussed many times on the pocket bike forums (yes, laugh away)

There are just much smarter ways to get power then turboing a pocket bike.

What RC people did was s/c the engines. www.rbinnovations.com . Now thats a good idea because the car will be able to be tuned more consistantly. Also, as i said above, you can put some pressure back into the fuel tank to increase the fuel pressure.

meh, i dont care, i have a stagea now :)

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share




  • Similar Content

  • Latest Posts

    • I am currently going this route. I am curious how much horse power you put behind the cut bell housing? Collins was telling me I am going to crack it and bluh bluh bluh. Because I didn’t buy the custom fly wheel from him. I am looking for somewhere around like 500 hp
    • Forgot to mention that these are the before pics when I first got it!
    • Thanks @PranK for the updated member status, much appreciated! 👍🏼 Now, about those pics… Unfortunately I could only find ones that I took in the dark. I was soon to discover that underneath it wasn’t in the best shape, but it was mine and that’s all I cared about at the time 😆
    • Oh, and only having done this task yesterday, I've now driven the car ~60km since, and while it is hard to avoid placebo effect and confirmation bias, I reckon that some annoyances I had with the way the car has been behaving have improved. Which....kinda makes sense, I guess. If the bushes were really stiff and resisting rotation, they would have been contributing to the effective wheel rate. And if it was more so on one side (which it was, because one side was worse than the other) then.... you might imagine that the additional rate would be asymmetric, and potentially even different between compression and rebound. And so... the car has been twitchy at higher speeds - like freeway on ramps. It really shouldn't be. The wheel alignment is good and there are no (other) known problems elsewhere in the suspension. But at 90-100 on a long sweeping ramp, tiny steering wheel motions would make it feel like it wanted to rear steer. Quite nervous. At lower speeds it would heave about in a manner that it didn't use to. Didn't want to put power down, etc etc. Now...seems to behave better. Am going to have to concentrate on the various corners where it has exhibited weirdness, on the rare occasions when I can get a decent run at them without Methanial getting in the way in his D-Max/Ranger/LDV Van/etc.
×
×
  • Create New...