Monza inlet manifold on TS1

[IanGP]

Anybody used a Monza inlet manifold on a 225 TS1 barrel? Just to try and gain a bit more frame clearance. Currently got one fitted with the Monza reed block and not very happy with the performance, doesn't seem to rev out in 4th, thinking I may need to fit a reed packer to open up the boost port. Rest of setup see below.

GP200 SIL gearbox with 18-46 final drive (may go to 19t front for 4.8 final drive)
Franspeed race exhaust
Augusto 6000 set @ 24' static
Dellorto VHSH 30 CS carb with 136 main jet (may go to 140) plug colour good at 3/4 throttle, running in
MB big head and fins removed from AF light flywheel, no cowls
EGT temps around 400 to 450'C CHT temps average 100'C CHT under head nut nearest plug.

Only thing I can think of is it's a little lean WOT or the timing needs adjusting slightly, at the moment I had better performance out of my previous Rapido setup. If no one can offer any clues I'm going to try the 140 main jet and a reed packer. As I say plug colour is spot on at half to 3/4 throttle.

TS1 top end currently stock while I set other things up, going to be tuned for Street class over the winter.

Cheers.

Ian

[corrado]

If it won't rev out in 4th now it's not going to make it any better by making the gearing taller.

I'd try static timing at 17 degrees and see how it goes without the Augusto.

[IanGP]

Thanks for the reply. Yes the ignition is one of the thing's I'll try. Funny how it was fine on the Rapido though but it does feel like it simply runs out of power in top gear when it gets to about 7000 rpm so will try it with the ignition reset to 17' static and no Augusto.
Now it's run in, First thing I'll do is up the main jet to 140 and try that as it maybe just going lean enough to hold it back at WOT, also going to raise the inlet manifold with a packer just for the hell of it and check pickup clearance on the flywheel.
I know raising the gearing won't cure it but it is something I'll try once I've sorted the problem out, it feels good on 5.1 especially with the light flywheel but I do feel it'll pull 4.8 ok once it's sorted.
In Spain at the moment so I'll get to the bottom of it when I get back and let you know.

[coaster]

FWIW, my TS1, 58x110 with 2.5 base packer and Ron Moss Avanti head, LTH short manifold, 30 phbh, 17 degrees static, Fanspeed Avanti Supertourer also runs out of puff in top gear on 4.7 ratio (GP200 gears, 17x46). It'll rev to over 7.5k in 3rd but only 6.5 k in 4th. On hills I'm constantly having to shift down so will be dropping to a 16t front.

[IanGP]

Thanks for that Coaster. Does sound much the same as mine. I'll try tweaking the jetting and raising the reed with a packer etc. I guess it could be simply reving past max power in top? If so.....raising the gearing slightly may well give me more top speed and have no determental effect? The barrels going to be coming back off for tuning anyway but just wanted to see what the best standard setup was first. The TS is certainly more critical on gearing than the 225 Rapido i previously ran.

Ian

[coaster]

No you will need to go the opposite way. I have just returned from a 1,000 mile ride round Germany on mine and only fitted the engine a few days before leaving. I was riding with Storkfoot on his bog standard Rally 200 mostly in the range of 48-55 mph and anything below 52 mph the power dropped away and I'd find myself on full throttle in 4th doing as little as 42 mph whilst he disappeared into the distance. This was worse on hills but if I dropped down to 3rd or sometimes even 2nd it would get back in the power band and I'd rapidly close the gap. Classic case of being over geared

[IanGP]

I get that Coaster but I'm already on 5.1 on an Indian GP box. I was thinking that mine maybe just running into a wall after the power dropped off?? And raising the gearing to 4.8 would lower the revs enough in top to keep it in the power?? Say if the power was dropping off at 6700 then there's no point in it reving to 7k in top as I'm over the top of the power curve. Problem is I have what I thought would be a revvy setup, light flywheel and race pipe. Excuse me if I'm talking sh*t....I'll get my coat as a side note mine pulls from nothing low down with hardly any clutch slip off the line, it's just flat over say 6500 (not exact figure) in 4th. Maybe it's ignition or maybe the 30 VHSH is holding it back? But these carbs are designed for 30hp 14000rpm karts. Maybe I should just wait till the barrels tuned and start again, just not that impressed with the legendary TS1 barrel to be honest. The tuned Rapido I had with the same carb and a more torquey pipe pulled 4.6 gearing and felt much quicker.

[holty]

when i tuned my ts1 i was looking for more tourqe, so i could ride it two up and up hills, i fitted a reed spacer and an mbd ilet manifold, had .5mm removed from the base of the cylinder and adjusted the squish to just under 1mm, a massive improvent over standard, and very rideable, i was using a 34mm delly with open mouth.
holty

[IanGP]

I'm begining to think what I'm experiencing is pretty normal. Never owned or ridden a "stock" TS1 before....anyway as I said this scooter is going to be in Street Class next season so at the moment I'm starting to sort the chassis out and other stuff that I need to prep, then the barrel is off for tuning anyway so not a major issue. Thanks for all the input guy's, I will have a play about anyway to see if I can improve it at all, be interesting to see if a reed packer makes any difference and I will try a larger main jet to see if it's a little lean wide open as reed motors do tend to lean off a little at WOT. May even try a slightly heavier flywheel as it's currently a AF light with the fins machined off so probably getting close to 1200g.
Ian