Just got my BL wur and got tunning questions...

ertech · 03-21-2012, 04:52 PM

Hi guys just got my BL wur and got tunning questions.
What do i set first?

Cold/warm pressure( should i leave it at what BL set it)
The fuel head co at 3%
ballance the injectors ( if i have one injector that flows less to I send more fuel there or
Do i reduce the others?)

Thanks
erick

JBL930 · 03-21-2012, 05:53 PM

What are your HP goals? That will give you an idea whether you need to raise system pressure first, in my opinion anything above 400 crank HP and you should shim the system pressure up from stock.
Then definitely balance the injectors for flow, then go from there....... We need more info

911nut · 911nut's Garage

If your engine is stock, start at factory spec for control pressures and work from there. Do you an an exhaust analyzer like an LM-1? You will need one. You will also need a pressure gauge and fittings and a pressure/vacuum pump so you can set boost control pressure.

RarlyL8 · RarlyL8's Garage

You don't set anything first, you put a set of gages on your WUR and record your pressures.
After you get your pressures you hook up an AFR gage and compare pressures vs AFR and adjust the pressures for optimal AFR.

ertech · 03-21-2012, 07:30 PM

ok will check with the gages , when I took off my injectors to clean in fall injector #1 did not flow as much should I adjust the flow first?
how about CO adjustment?at what point should I make sure the CO is set at 3?
got a k27-7200 , bb exhaust,1 bar spring an Andial IC and yes I got a AFr ,pump etc..
Thanks

JBL930 · 03-22-2012, 01:39 AM

With those mods then stock 'system' pressure will be fine. If you've already confirmed that the injectors aren't balanced then that clearly needs addressing...... There are threads on here talking you through it step by step.
After that stock 'control' pressure for cruise and idle will get you close...... And then where ever you need to be to give you the fuel up top at 1.0 bar.....

Did you buy the RPM solenoid? You'll get a pretty heavy fuel dump in the midrange without it, as you'll be making some pretty large adjustments to get the fuel you need for 1.0bar.

Some just live with it, I'd want it right, speak to Leask about it, or just take a good read on his website, it'll talk you through most of your questions.

RarlyL8 · RarlyL8's Garage

The instructions that come with each WUR are thorough, do you have them?
If one cylinder is flowing less fuel you need to know why. It could be the fuel head or the injector. If it is the injector then replace, if it is the fuel head it needs cleaned or rebuilt if old and full of gunk. Do not adjust the head to compensate as it is telling you something and will only get worse.

ertech · 04:03 AM

Great thanks
Got the solinoid and rpm switch and the instructions but it does not say anything about the CO adjustment.
At what point do i set the CO at idle ?Before I start messing with the WUR?
Thanks

mark houghton · 03-22-2012, 05:05 AM

Quote:

Originally Posted by ertech

Great thanks
Got the solinoid and rpm switch and the instructions but it does not say anything about the CO adjustment.
At what point do i set the CO at idle ?Before I start messing with the WUR?
Thanks

If you know you have an injector that's off balance, the as already suggested replace it first. Then, as suggested put on the gauge and check all the pressures at the WUR so you can have a baseline upon which to work if future adjustments are needed. Note: When I bought my WUR from Brian, the settings that he included were all very close to what I actually got when testing after my installation.

Once you have a baseline, go ahead and set your CO% at idle by adjusting the mixture screw on top of the fuel head. Then re-set your idle screw as needed to get the proper RPM, recheck your CO% and tweek as needed. Check your ignition timing while you're at it, then go for a ride and see how the AFR's look under all conditions, including full boost. Come back and adjust the WUR if needed.

ertech · 03-22-2012, 05:14 AM

Great thanks
The injectors are good , i swaped the one that flows less with another one and still the same problem on cylinder 1 , i will adjust the head today
Thanks

JBL930 · 03-22-2012, 11:47 AM

Think you're missing the point, if you had a bad injector, you've replaced it, and it's still not right, then you need to get your head checked....... It may be someone has messed with the adjustment and it just needs a tweak..... But it could be gummed up, and then clear itself in the future sending your fueling all over the place

ertech · 03-22-2012, 02:20 PM

when I put it is not the injector , when i swap them the problem is still on cylinder 1
Thanks

JBL930 · 03-22-2012, 02:50 PM

Well I'm my opinion you need to get your fuel head checked and cleaned..... If you are getting a lot less fuel through one injector, and you've tried and different injector, you could have a clogged/gummed up head.
If they are slightly different from each other then by all means make small tweaks with the little Allen key adjustments on the top of the head.

What you have to ask yourself is why should one go wildly out of spec all of a sudden? Sounds like more than just a small adjustment issue mate, but it's your car and your shout....

ertech · 03-22-2012, 03:35 PM

No no sorry my English is not to good , there is a small variation not big. No problem in drivability just double checked and was a little of
Thanks

JBL930 · 03-23-2012, 01:57 AM

Ah, ok mate, all good then......
Follow StuP's instructions on his thread for checking the flow to each. Remember to have a battery charger hooked up to the battery so you're getting the same 14+v to the pumps like you would if the car was being driven.....

If it was me, and you plan to add more modifications in the years to come. I would shim up the fuel head to give more system pressure now. Then you will be running at maybe 70% of your total capacity, and if you go with a bigger turbo or more boost, youbmay just need to make small adjustments to boost enrichment control pressure at the WUR.

Where if now with a low-ish system pressure you may be up at around 90% capacity...... And even though raising system pressure takes minutes, you would need to go through and retune all of the settings at the WUR......
Just me thinking ahead......