26 degrees, still pull timing?

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Jul 1, 2010 | 11:36 AM

#41

RealLiveMD

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Quote:

Originally Posted by Brian@SpectacleSolutions

This kit was not sold or installed by me. Matter of fact I happen to know this kit has been installed and reworked a couple of times by the customer and another local shop.

Where it leans way out in the run..... it's obvious the sensor came out of the exhaust. This was a year ago.

Here is an overlayed graph. Please let me know where I can get those electronically controlled variable jets

Brian didn't install the kit. I won't lie either way. I didn't start the thread to bash spec solutions. Rather it was to gain info.
Those runs though are from dyno day held at the shop 2 weeks ago.
blue run, pressure at 975. This is pretty much identical to where it was a year ago and the previous graph posted. The same lean spike then to rich.
red run, it appears the nitrous solenoid didn't open until about 4250 then the AF raised. I've had problems with the nitrous solenoid working. That explains why the car was dead rich and low on power then the nitrous kicked in late.
Its all good though, I think I know what I need to do. Maybe get the car tuned to about 11.5 NA instead of 12.8. Then possibly, I won't be so lean initially. Also, I will make sure the bottle pressure is good before and after the run..

Last edited by RealLiveMD; Jul 1, 2010 at 11:45 AM.

Jul 1, 2010 | 05:25 PM

#42

BLK02WS6

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From: on the dyno tuning in MD

No, apparently you don't know what to do... you don't tune the car to 11.5 NA in order to stop the lean spike! You say you have problems with the nitrous solenoid... sounds like you need a better nitrous kit to start with.

Lean spikes when the nitrous comes in are normal and will not hurt the engine. If you want to lessen the spike, you can lengthen the nitrous line from the nitrous solenoid to the nozzle and make the fuel line between the solenoid and nozzle as short as possible... that makes the spike a little smaller. But they are gonna be there...

Jul 1, 2010 | 06:58 PM

#43

w3s1c0a5t

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Quote:

Originally Posted by BLK02WS6

/thread

Jul 1, 2010 | 07:55 PM

#44

ATVracr

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From: GB

Bret, Nice to see you posting here again. Hope the family is doing well.

Jul 1, 2010 | 08:03 PM

#45

BLK02WS6

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From: on the dyno tuning in MD

Quote:

Originally Posted by ATVracr

Bret, Nice to see you posting here again. Hope the family is doing well.

Thanks man! Yes, doing well so far! Hopefully Shawn gets his car done soon and I'll be at the track some...

Jul 1, 2010 | 09:06 PM

#46

RealLiveMD

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Quote:

Originally Posted by BLK02WS6

Thanks. I wasn't really referring to the lean spike though. I was referring to the fact that the car is about 13.1 for the first 2-3000 rpms before it dives rich. I was thinking that if my NA wasn't at 12.8 then the nitrous even when I get it right wouldn't be at 13.1 before diving. Let's say for kicks and giggles that the problem is my bottle pressure not holding until the end of the run or the nitrous solenoid is trying to close. After upgrading to some NX solenoids and a full bottle, the rich dive may cease to exist. Then though I'd be left with about 13.1/1 a/f. Hey I'll admit I'm just learning. I also appreciate all the advice that I've gotten from NX express. It's interesting that Nitrous Xpress guys have been the most helpful in spite of the fact I've only spent about $40 with them and $3 grand with the other folks.

Jul 1, 2010 | 09:12 PM

#47

fastoyzz

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From: P-Cola Fl

i have a carb'd cam only ls6 i run 30 on a 100shot and 26 on a 150, stock bottom end and no problems yet.. =0/ just my imput on 9psi fuel pressure and 900 to 1000 bottle pressure..