The making of an ultimate GN250

**huff3r** · 30th December 2009, 20:05

Originally Posted by gatch

If it was battery powered, then I imagine there would be either of 2 problems.

1. carrying charged batteries, electric motors are not awesome on power saving under load.

2. putting heaps of load on your already rubbish charging system..

I reckon on such a lame motor you would be better off with a second tank full of nitro methane

Have a wee injector plumbed straight into the carb..

Or a pair of 20lb NOS bottles on the pillion seat..

Ummm... heard of an electric supercharger? They use them on some cars.... works the same as a normal supercharger, except the extra load on the crank comes from the alternator, rather than an additional pulley...

**wbks** · 30th December 2009, 20:05

Originally Posted by gatch

If it was battery powered, then I imagine there would be either of 2 problems.

1. carrying charged batteries, electric motors are not awesome on power saving under load.

2. putting heaps of load on your already rubbish charging system..

I reckon on such a lame motor you would be better off with a second tank full of nitro methane

Have a wee injector plumbed straight into the carb..

Or a pair of 20lb NOS bottles on the pillion seat..

Yea, nos is the go, just have the bike wreckers number on speed dial. If they can do it for cheap 49cc pocket bikes you could do it for a gn!
Electronic fan as a turbo, run it on nitro and nos, and put some stickers on it...

**gatch** · 30th December 2009, 20:17

Originally Posted by huff3r

Ummm... heard of an electric supercharger? They use them on some cars.... works the same as a normal supercharger, except the extra load on the crank comes from the alternator, rather than an additional pulley...

Yes I have, and if you took any notice of what I posted before, the average bike charging system is shit.. And would not handle the extra load..

**gatch** · 30th December 2009, 20:18

Anyway, Dean hates GN's, so what is this all for ?

**wbks** · 30th December 2009, 20:19

Originally Posted by gatch

Anyway, Dean hates GN's, so what is this all for ?

Showing everyone how rehabilitated he is

**huff3r** · 30th December 2009, 20:21

Originally Posted by gatch

Yes I have, and if you took any notice of what I posted before, the average bike charging system is shit.. And would not handle the extra load..

Yeah, that is a good point... but does a GN even put out enough exhaust with enough pressure to spin a compressor???

It'd end up mighty quiet with the Turbo killing all the noise.... it's already bloody quiet!!

**gatch** · 30th December 2009, 20:24

Originally Posted by huff3r

Yeah, that is a good point... but does a GN even put out enough exhaust with enough pressure to spin a compressor???

It'd end up mighty quiet with the Turbo killing all the noise.... it's already bloody quiet!!

I doubt it would rev hard enough unless you gave it a bit of nitro/nitrous to get some more gas moving.. Or a tube he could blow into

**wbks** · 30th December 2009, 20:24

Originally Posted by huff3r

Yeah, that is a good point... but does a GN even put out enough exhaust with enough pressure to spin a compressor???

It'd end up mighty quiet with the Turbo killing all the noise.... it's already bloody quiet!!

Like I said, if people have done it with 125 cc buckets it's possible with a 250cc gn

**gatch** · 30th December 2009, 20:25

Originally Posted by wbks

Like I said, if people have done it with 125 cc buckets it's possible with a 250cc gn

Depends entirely on how much gas comes out the exhaust.. Might be able to turb a 125 2 stroke ?

**wbks** · 30th December 2009, 20:27

Originally Posted by gatch

Depends entirely on how much gas comes out the exhaust.. Might be able to turb a 125 2 stroke ?

It wasn't a two stroke. Like I said it was probably a battery powered one, and I'd imagine a small car battery fully charged would last quite a while!

**huff3r** · 30th December 2009, 20:29

Originally Posted by gatch

Depends entirely on how much gas comes out the exhaust.. Might be able to turb a 125 2 stroke ?

Yeah, especially with the GN's lazy low-revving torquey single...

Why turbo a bike that has decent torque anyway? Much better off turbo-ing something high-strung to give it a mid-range punch....

I doubt itd have any effect at all to be honest.... perhaps just make a decent ram-air setup? And skim the head/barrel to raise the compression a tad...

Add that to a half-decent exhaust and you might just.... have wasted over $2k

**huff3r** · 30th December 2009, 20:30

Originally Posted by wbks

It wasn't a two stroke. Like I said it was probably a battery powered one, and I'd imagine a small car battery fully charged would last quite a while!

Battery powered means its a supercharger not a turbo

Only exhaust driven ones are turbo, difference being a turbo converts "wasted" energy into higher compression, whereas a supercharger "steals" energy from the crank (or a battery) to pump up the compression...

**wbks** · 30th December 2009, 20:41

Originally Posted by huff3r

Battery powered means its a supercharger not a turbo

Only exhaust driven ones are turbo, difference being a turbo converts "wasted" energy into higher compression, whereas a supercharger "steals" energy from the crank (or a battery) to pump up the compression...

I see... I still think hooking up a blow drier with the heater taken out is the way to go