Flooding downhill

[PwdrNut]

This is on an 05 RX-1 with a Supercharger. I don't know that the SC has anything to do with the problem, but my guess is that the fuel pump does.
When I go down a very steep incline, the sled floods out. At the bottom, it will start again with a little cranking and eventually clean out.
The float bowls were checked during the install and were all within specs.
Any thoughts?

 

[peteracing]

try lowering float level, too much fuel in bowls... wen pressurised, fuel syst. does-not need stock fuel level to feed jets properly.

 

[wildbill]

I had this same problem with my turbo, but when I adjusted the float level from 7mm to 11mm it solved it. I would check your float levels again. I believe the manual suggest 11-15mm. Hope this helps.

 

[Mountaintech]

Wildbill, Your setting of 7-11 mm is raising the floats and the fuel level in the bowls. Wouldn't you want to be doing the opposite??

 

[spray25]

Whatever your float level is lower the level (higher measurement when they are upside down) by 4mm. This will cure your problem. I have seen this on numerous turbo sleds.

Edit: My floats have been "out of spec" for two seasons now and they work great.

 

[Mountaintech]

Spray, Do you have your floats set at 19mm?

 

[spray25]

I do not know what the measurement is for sure. When we adjusted them last year we were not 100% sure where to measure from. We picked a spot and moved them 4mm.

 

[Mountaintech]

Spray, your floats may still be within specs if they were at 11mm to start with. 11mm+4mm=15mm. (stock specs 11-15mm)

 

[spray25]

Could be, but the way we measured them showed something like 17mm

The dealer had previously checked and said they were 15

 

[Mountaintech]

Thanks for the info. It sounds like this may be a good idea.

 

[ken_climb]

Mine are set at 15ml, should I try it at 19? Don't want to run ouit of fuel when climbing though, but sure would be nice to stall less when jumping or when I hit a bump to fast......These turbo's are fun but i miss jumping!

 

[PwdrNut]

I adjusted mine to 15. It seems to have solved the downhill problem, but haven't hit a real steep one to be certain. But it is definately better!
Thanks

 

[spray25]

Mine are set at 15ml, should I try it at 19? Don't want to run ouit of fuel when climbing though, but sure would be nice to stall less when jumping orwhen I hit a bump to fast......These turbo's are fun but if I can't get this thing tuned so it doesn't stall when jumping its gonna be for sale.

Try 17 and see if it improves.

 

[RX-1 Moose]

ken_climb,
Do you have an 03? If so have you updated the float bowls?
Just a thought.

 

[Turbo Tim]

The way I read the manual it was to measure from the highest part of the float .I moved mine from 11 to 15 mm.