Alky tuning questions

[darb]

Did some test runs today. Hard to do since my spray on light isn't working right, but I think it is coming on around 10-11 psi boost. I have a Trans plus and Extender chip for alky that has 23/21 timing. Turned the timing down to 19/19 on the translator. From a roll, say 35-40 mph, then wot, my knock gauge lights up all the way in the last red light Getting this from the downshift maybe? If I just roll into the throttle lightly all the way to wot, then I am getting no knock at all at 19-20 psi boost. My pump speed is set on 7 and I am using 100% denatured. Could I be getting too much alky in the engine on those quick wot hits? Can too much alky cause that much knock? Need to find out my problem with the spray on light also. Any ideas?

Brad

 

[turbot2112]

do you have a scantool and were are your 02s at. be careful cause my light aint coming on and i dont think the pump is either.

 

[Turbo__Tim]

No scantool? You should have an egt to predict the onset of knock so you can lift before you begin to damage your engine.

The first thing you need to do is stop, and get the turn-on point established. That is the one setting that remains constant. (1-2 psi before knock). If you can access the contacts on the hobbs style switch you can rigg up a test light.

I shouldn't tell you this, at this point, but you prolly need more timing, and less spray. Drowning the spark will increase temps in the headers as all the un-burned fuel ignites. A high reading on the egt, early in the run, would indicate this.

Another thing is check the spark. Just pull a wire at the coil, and see the spark is blue, and will jump 2-3" to ground.

I really hate to tell you to turn the spray down, and increase timing, before you can be sure that fuel pressure is correct at WOT. A $50 guage from Postons, that can be taped to the windshield will take car of that question mark.

Are you sure the alchy pump is working right? See how much fluid is pumped in 12 seconds. Set it so you are spraying 8 ounces in that period of time. That will get you in the ball park.

If you can't run close to 15 psi without knock, then you have other problems, and need to fix that.

Before increasing timing throw a couple gallons of toulene in the tank, to guard against heavy knock. Since you are flying blind, this might save your engine...Two ounces of Marvel Mystery oil, get added for every 3 gallons of toulene..

You really shouldn't be doing any of this without an egt. Going into the 'red' even for short periods of time will damage the mains.

 

[Red Regal T]

Originally posted by Turbo__Tim


You really shouldn't be doing any of this without an egt. Going into the 'red' even for short periods of time will damage the mains.

Tim.......since you bring up my name......After reading that "book of instructions" above, I just have to thank my lucky stars I installed a diy kit on my car over three years ago. I just can't believe all the bull with that system.

 

[Turbo__Tim]

Pssssst....Red, don't tell anybody, but the DIY systems are better than the 'store bought'.

More people would make their own if they cost more. You know how that goes....

I wrote the instructions because I am tired of you complaining about going 12.5's, (on the 'special tires')and running meth, and never having to change a pump. It's obvoius to me that you have been denied the joy of having to dial in an alchy system.

You don't know how much fun you are missing!

In case you read this, I was wondering if you are running a 2 stage alchy system. That would explain, in part, your lack of tinkering.

 

[darb]

My o2's were anywhere from 800-840. Some of the blasts were not even wot so my scanmaster did not even register then, but the knock gauge was showing knock. I was able to run 15 psi boost before the alky kit with a 20 degree timing chip. The car ran flawlessly, but I also ran a xylene mix most of the time also to keep things safe. Where to get a quality egt gauge? Having the timing at 19* now is too low, so should I put it back to 21* and try leaving the pump speed at 7 or so? First things first, I have to get the spray on light working. The hobbs switch has good connections so I don't understand that. It's as if there is a short, because during some of the wot runs right as I would let off the throttle at 19-20 psi, the spray on light would flicker. Hang with me guys as this alky thing is brand new to me. Any suggestions now?

Brad

 

[Red Regal T]

LOL TIM .........NO JUST SINGLE STAGE. DUAL STAGE IS JUST TOO "EXOTIC" FOR ME.

 

[Turbo__Tim]

You said it - first thing is get the alchy on light running. Talk to Steve (SMC ) (too many Steves!!) and get that right first.

I would strart out at 15 psi, but go full throttle. I'm not sure, but I've heard things about power enrichment mode that would seem to make this a good idea. Perhaps one of our gurus could shed some light on this....

You don't absolutely need an EGT. I suggested it in your case because you seem to have a lot of knock.

You had better get the alchy on working, and check flow. If the pump is cutting out, that would explain much.

 

[turbot2112]

call steve, i talked to him yesterday about my problem. hes a real nice guy and will help you get it working.