GTS OWNERS CLUB

russpeed · Posted: Wed May 30, 2007 1:33 pm Post subject: Give me some HEAD!

Looking at a GTS head today, the ports and valves etc are all the same as GT/VX125 so the big valve/spring/cam/porting set up should see similar gains as their is on the 210cc scoots wev'e done the head on.
I predict 4 or 5 bhp gain at the rear wheel and another 4 to 5 bhp from open filter/exhaust and fueling mods which may consist of PM's power commander or maybe not.
I think feuling can be sorted another/better way.
Anyhow if I can't get one to wheelie I'll be somewhat disapointed.
Hopefully the head will be back early next week from CNC machining and we will find out.

Russ.

smirnoff · Posted: Wed May 30, 2007 2:51 pm Post subject:

Who's the brave boy then Russ Shocked

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PHIL....

russpeed · Posted: Wed May 30, 2007 3:04 pm Post subject:

Who do you think?

Just been chasing round for a bigger injector but there are none according to Webcom.
However I have something else up my sleeve that I'll have to investigate which may negate the need for an injector swap.
Phil, you said to me that you were up near the limit of what the PM box is capable of, well how near exactly?
Could you get another 10% out of it?

Russ.

smirnoff · Posted: Wed May 30, 2007 3:07 pm Post subject:

nearly all gone, he said " theres next to fook all left"
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PHIL....

GWGTS250ie · Posted: Wed May 30, 2007 3:07 pm Post subject:

smirnoff · Posted: Wed May 30, 2007 3:08 pm Post subject:

Might be worth giving him a ring though, now he's had a look at it. They may be able to do something with it or even an alternative.
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PHIL....

smirnoff · Posted: Wed May 30, 2007 3:09 pm Post subject:

Maver · Posted: Wed May 30, 2007 3:13 pm Post subject:

........and it's not me
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russpeed · Posted: Wed May 30, 2007 3:13 pm Post subject:

OK Phil here's what I'm thinking.

No injector upgrade.

Then lets up the pressure in the fuel rail, just trying to remember how its regulated.
Seems like ages since going on the course but the pump is submerged in the tank so the regulator must be aswell I guess.
Even upping it by 1 psi should see your adjustment come back down to earth.

I'm going to leave the airbox on this one until I sort the injection rate out.

smirnoff · Posted: Wed May 30, 2007 3:22 pm Post subject:

By the way Russ, mine Wheelied out of the Phoenix do carpark on the sunday morning..........only a little one...turned the corner out of the carpark, gunned it as the scoot straightened up the front wheel came up too, enough to make me laugh and kak myself at the same time. Laughing

Not a true one i know but hey Laughing

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PHIL....

CheekyThomas · Guvernor Joined: 18 May 2007 Posts: 1374

Yes the basic fuel pressure reg/filter and pump are all one unit together sitting in the tank...

But its unlikely that it needs more fuel on the entire rev range, and unlike the adjustable ecu boxes you wont be able to adjust the fueling for different throttle openings.

Within the tolerances of the injector unit, the fueling shouldnt be that far out as the lambda probe should keep the mixture right to a certain degree, although for performance it needs bypassing and allowed to richen up a little...

Sounds like lots of dyno time coming your way! Laughing

It will be nice to know the outcome. Very Happy

GWGTS250ie · Posted: Wed May 30, 2007 3:48 pm Post subject:

GWGTS250ie · Posted: Wed May 30, 2007 4:09 pm Post subject:

CheekyThomas · Guvernor Joined: 18 May 2007 Posts: 1374

Aimed at Russ really...

Have you tried using one of the GPR electronic boxes on a scoot yet? Did you have much success??

russpeed · Posted: Wed May 30, 2007 4:42 pm Post subject: