Triumphrat

Saigon5 · 04-21-2005

Well, hopefully, I am near the end of this run. In any cases, I will run out of time to play soon. Todays run was made with 138-134-138 main jet, 1/2 shim under the needles, still the Trophy stock airbox and the Speed tripple cams.

I am working on the result and will post them soon. I have to decide for a trade off or actually, where I want the most power in the rev band. This run made it to 87 HP and 57 lb-ft torque. To gain a bit on top, I had to loose a bit in the middle so my thinking now is that I will aim at jetting for peak between 3500 and 7500 RPM.

fbird · 04-22-2005

Great update! What are you planing to do next? Open up the airbox? Or just more jetting changes?
Overall how is the feel of it as far as acceleration compared to stock?

Saigon5 · 04-22-2005

I am not really sure at this point of what I will do. For this year, I do not have much more time to play. Riding season is soon here and I will be away for a month so further experiment will continue next year. As we stand, there are a few options, one would be to open the airbox more but I do not think it would change the fact that there is a whole in the range.

As you see here, the trade is off is power on top or power in the middle. I will change the jets for power in the middle. By middle I mean from 3500 to 7500 RPM.

The solid line is 38 pilot jet, 138-134-138 main jet, 1/2 shim under the needle, stock Trophy air box.

The dotted line is 38 pilot jet, 128-128-128 main jet, no shims and stock Trophy air box.

Here is the mixture graph, the lines are matching the previous one.

As one can see, is has more horse power on top but loosing some in the middle and it does get quite rich from 4700 to 6500 RPM. I will rejet but I am not sure at the moment what jet I will use. I am trying to do fancy calculation to get there. Chances are I will use 134-130-134 and keep the shims.

Quote:

Overall how is the feel of it as far as acceleration compared to stock?

It is stronger than stock, at this point I have 10 more horse power and 7 more pounds of torque. It is very hard to compare since I did not use the bike for winter and on teh first ride I have a different set up but I can guarantee you that a stock one is lost besides.

The price of 10 horse power and 7 pounds of torque.

I am calculating in Canadian $ and will translate at the end. Cams 400 $
Air box 100 $
Jets 15 $
Dyno run 225 $
Various gaskets, 25 $

Total, 765 $ or at today's rate 620 $

Fun of doing it, feeling more power on the bike, loosing a sport 600 at the exit of a slow curve, priceless.

Say 310 $ for horses and 310 $ for cows (torque) or 31 $ per horse and cows come at 44 $ a piece.

[ This message was edited by: Saigon5 on 2005-04-23 06:07 ]

Saigon5 · 04-27-2005

Just in case someone wants to see how the Trophy box look on the bike when all up

A closer look.

jimmyj900 · 04-27-2005

Saigon5,
The jetting looks pretty good, but you really need to go up a size on the pilot jets from 38 to 40 and turn down the mixture screws accordingly.

That will smooth out the transistion from the pilot circuit to the full-throttle operation a bit and help prevent small-throttle fuel starvation.

Also, you might want to shop around for dyno guys. The folkes here at Hitman Motorsports (White Bear, Minnesota) charge $75 for an initial dyno run and $40 for subsequent runs. That doesn't include any jetting -- just a few minutes on the dyno. With jetting the price would be similar.

Since they've got a Factory Pro dyno you can get the run data put on a floppy and download the software from FP for your personal computer.

Altogether, those are EXCELLENT results! :-D

Jim

Saigon5 · 04-27-2005

Quote:

The jetting looks pretty good, but you really need to go up a size on the pilot jets from 38 to 40 and turn down the mixture screws accordingly.

Yes, I will do that. I just ordered a screwdriver in order to be able to do that.

Also, you might want to shop around for dyno guys.I wish I could, there is no other dyno shop around, the next one is 40 miles from here and he is afraid of putting my bike on the dyno.

Quote:

The jetting looks pretty good

I will go down a bit on the main jet in order to have the best power in the lower range, say 4000 to 75000 RPM, this is where I will use it most. The dyno guy is trying to get me to jet for top end but I will do as my head says and get the power a bit lower. Not many chances that I will be running at 9000 RPM all day long.

I may have time to make one more experiment and it will be with 132-130-132 main jets. I am also using a 45 teeth rear sprocket now so you can feel this baby pull.

crosstie · 04-27-2005

So, it looks like those T509 cams are working out for you?

I'm curious, because I have a line on some T509s, but others (TBStunta IIRC) have said they're not really compatible (or at least *as* compatible) as the T309 cams, so I'm wondering if I should wait.

Can anyone shed any light on this? What the diff is, or why the T509s are worse... power difference between the two... anybody... Bueller... ? :-D

(Sorry for the thread highjack...)

Saigon5 · 04-28-2005

Quote:

So, it looks like those T509 cams are working out for you?

It would seem so. I must say that it was a very easy thing to do and the result are enjoyable.

May be there are more complicated way to gain power but I was not interested in that. With these cams it is about like having 100 HP at the crank which is quite good for this bike. At speed the bike remains me that the frame is not the one of a sportbike.

For your main interrogation about the T309 or T509, don't ask me, I could not tell you the difference between them. I did a fair amount of reading before starting this and I knew that the cams I was getting could be the wrong one. I was reading that I needed a certain year of cams but in most cases nothing was backed up with facts. (dyno run) Actually, the dealer where I got them verified the part number and they were the same.

Now we know for a fact that more recent cams are working.

[ This message was edited by: Saigon5 on 2005-04-28 04:55 ]

crosstie · 04-28-2005

Quote:

Now we know for a fact that more recent cams are working.

True dat :-D

Thanks for the info.

crosstie · 04-28-2005

Quote:

Now we know for a fact that more recent cams are working.

True dat :-D

Thanks for the info.