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rxrider's Turbo Garage - pics back, will continue

Thanks for your input buddy :)

1. I can't see that will cure the problem, remember it ran perfect for 10 minutes prior to misfireing.
2. I have adjusted the meth controller to start at 8 lbs boost (highest setting possible) and full spray starts at 25 lbs boost (highest setting possible).
3. I run 50/50 2-propyl/water by volume

I have sent a PM to Hurricane, he may be able to help me out. I will tear the sled apart next week and start looking over the complete turbo install... there gotta be somthing funny going on, but what ?????
 

I replied in your turbo post, disconnect all non essentials (head lights, tail lights, grips, etc) and that will give you almost a 150% increase in available watts.

It also explains the 10 mins delay in the problem happening because that is how long it would take to wear the battery down which was compensating for the shortfall in juice from the stator once it was drained you run out of power and she misfires when the meth pump is drawing the most power. Mind you the battery may not be dead but it will be low enough to drop the system voltage under 12 and then things go haywire.
 
Kinger - Thanks for your input buddy. If going with leaner jetting won't cure my problem I will start moving electrical draw from my system one component at the time until all left is the fuel pump and meth pump. I may start by unplugging my carb heaters, they may be on all the time, who knows.
 
No, I've just started taking her apart. My plan is to work on the sled until I'm done and take her out on the grass when the autumn chill sets in, or sooner if I can manage to get her done with earlier.

We have snow in the mountains and ice on the lakes still, but we're up to very large fines if cought riding off season. Fines for violating the motor laws riding off season are at 1/2 of my monthly pay check, not worth risking, can't affort to be punished like that.

Let's make our sled even better for next season :) Think snow buddy.

Jan-Ove
rxrider
 
SEASON 2009/2010


Update May 15. - Adjusting fuel pressure.


Thanks TT for sending me your fuel pressure meter. Prior to adjusting the fuel pressure I had the fuel pressure regulator adjusted at 12 mm thread showing.


I wanted to measure fuel pressure with the regulator tied up behind the carbs.... First thing was hooking the fuel pressure meter up at one of the lines going to the carbs. Then I installed all hoses, Vortech, IC, everything, and started the sled. What???? almost no fuel pressure at all, no matter what. I turned down the adjuster bolt all the way and I could not get 4.5-5.0 lbs of fuel pressure. In addition the fuel pressure meter bounced all over the place. I had to pinch the line to restrict the air flow to have a solid reading. I can imagine killing the diaphragms inside the regulator with pulses fluctuating all over the meter....

I removed the pressure signal and T'ed it in front of the IC. I backed off the fuel pressure regulator adjustment bolt and started the sled over again. Now my fuel pressure was pretty much bang on... 4+something, I turned the adjuster in a bit more and got 4.5 lbs at idle (1350 rpms). I measured the threads showing after locking down the lock nut, I had 8 mm threads showing to get 4.5 lbs of fuel pressure at idle.

I went over to my friend Mikkel and we measured his fuel pressure while at it. At 4.5 lbs of fuel pressure he had 8 mm threads showing above the lock nut, exactly the same as on my sled.

Now I have to rejet the carbs... I run around 11.0 AFR at full boost 18 lbs running 132.5 main jets at sealevel... I'm puzzled, I may have to go down to 130 or even 127.5 to get her in the mid 12s at WOT 22 lbs. I will work on the carbs, redo all my heat shields, and do some summer testing on the grass.

Thanks TT for lending us your fuel pressure meter, I will return it early next week with the MCX IC and BOV plate. :Rockon:
Thanks Mikkel for lending a hand :) ;):D :tg: ;)!
 
No problem buddy!

Interesting that you had to go down to 8mm on the threads - I had 11mm - this should help with the flodding issues I have had. This toghether with the new bov that is on the way and fuel pressure adjusted correct - it should take care of the problems.

I will dobbel check it when I have time. I am getting ready for salomon fishing
 
TT said:
No problem buddy!

Interesting that you had to go down to 8mm on the threads - I had 11mm - this should help with the flodding issues I have had. This toghether with the new bov that is on the way and fuel pressure adjusted correct - it should take care of the problems.

I will dobbel check it when I have time. I am getting ready for salomon fishing
Click to expand...


Going from 12 to 8 millimeters on the adjuster is going up in fuel pressure a lot. My sled had too low fuel pressure so I had to increase it.
 
PM'ed back on Mikkels setup :)
 
Update June 25. - Parts on order.


I have parts on order for my turbo project from Greg Santry (Twin Turbo) at Powerbygns.

I ordered:
- Two sets of cam sprocket bushings to adjust cam timing without having to grind the holes for the bolts, one for RX-1 and one for Apex (they are the same part).
- A cam timing jig including two micrometers, one for the intake and one for the exhaust cam.
- A TDC measuring jig with a micrometer
- A large degree wheel with mounting hardware
- A pointer to be fixed to the engine

I'm debating on raising the compression from 9.13:1 to 10:1 by removing the two stacked head gaskets and replacing it with a new single gasket.

Anyway I'm going to change out the stock head studs with 10 millimeter APR head studs.

We're past summer solstice, it's getting darker every day, winter is closing in on us, time to start working on the sled. This season I'm going to have the sled ready to ride before the snow falls.... I hope.
 
This season I'm going to have the sled ready to ride before the snow falls.... I hope.
Click to expand...

yeh, that's what we all say every summer ;-)
somehow it always have to start to snow to get things moving..
 
So true JH, but at least parts have started to move in my direction so when they arrive I will start working on the sled, kinda motivation getting parts in house :)
 
The parts I ordered from Twin Turbo aka Greg Santry at Powerbygns are now heading my way, I guess I will have them some day next week.

I have also got a package from TT with his Tial 50 millimeter BOV for a test install in my sled to see if it will fit in my application. So far by looking at it I think I can make it fit in front of the IC core facing down into the nose cone of the sled.
Thank you TT for letting me borrow your Tial for testing purposes.
 
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