05 vq rev up, tt, 93 pump gas,timing set flat at 51 (uprev) logs show 9 degrees at 4800rpm,thats when it starts knocking,go to 48? 45? keep going down or am i missing something? afr at 12.5 at 4800

 

Need more info, Boost?, Fuel System Details? ECT ECT ECT

Best to show a log

If it's Knocking in an area, it's 1 of 3 things , or a combination of them

1. Ignition timing, too much advance

2. AFR's, to Lean

3. Fuel Octane

 

Hey Old Man, pulled more timing and made a 3rd and 4th pull. More info- Greddy TT, 93 pump gas,walbro with factory rails, intake air 82,660cc injectors. First pic 3rd gear with no knock,second pic 4th with knock. Not taking higher than 5000 till i get the timing right. I know you are going to wear me out about the factory rails but go ahead and school me
3rd

4th

 

Your timing is very low. At 5k rpm I'm at like 13 timing at full boost and that's still conservative. 7.5 used to be the lowest my car would see, but that has been changed. I think I'm at 15ish around 5k now

 

12-15psi boost

 

This was my VERY conservative timing table before I advanced it more. I did not knock with this.

 

Pretty sure oldmanz runs about 18 degrees timing at full boost

 

thanks iideadeyeii , i thought so too,just dont know where the knock is coming from

 

What plugs are you using?
I'm using 2-step colder copper NGK's

 

One step colder NGK-before i retarded timing it was breaking the 275 tires loose in 3rd gear at 4000-but this is a stock motor so im trying to be gentle

 

Bring the AFR down. 11.8 Is what I run. 12.5 is high for boost

 

Hey Old Man where are you? Hope you didnt kick the bucket Anyway this isnt my daily driver so i like to experiment. I put 4 gallons of E85 on top of a half tank of premium. Ran it for a while, adjusted K up to get back to my afr's, put timing back to 55 (13 degrees) and shes back to spinning the tires in 3rd with no knock. I have tortured this car for 6 months with zero mechanical issues. I have been a GM man since 1986. No more. Nissan Forever

 

and so you dont think im blowing smoke-wife has 08 FX35-daughter 06 g35 coupe-sister 05 sedan-and mom 11' G25,so ive been converted. But anyway please tell me what you think about my E85 experiment

 

With your boost range you should be about 15-18 BTDC.

To little Timing can cause problems as well.

And with your setup a CJM Stage 2 full system is needed. What pump to you have? If you already know I will give you Crap about the stock fuel rails and Walbro pump, what is it that you already know?

I think their is some else going on, because 5-7 BTDC is just way to little. Also, why are your AFR's so much Leaner in 4th Gear? Hard to tell without a Boost Log.

I wonder if you have a bad knock sensor?
Could be False knock?
Is the Stock ECU pulling Ignition Timing? Based on your chart No.
Is this the Stock knock sensor?
Do you actually Hear Knock?

Could be a Bad Fuel Injector.

This is want I would do.

Verify that you have Real Knock.

Verify All Injectors are working Properly.

Unless you are going to tune for e85, drain the tank and start with a fresh tank of 93 pump.

Don't know if you have changed Cam Timing, but if so put that all back to stock specs.

Make AFR's 11.5-11.8.
Look into getting a CJM Stage 2, + Pump? This will cure so many Tuning Headaches you won't even believe it.

Are you still coming after me? LOL

Hope this helps

TimRod

 

yay,old man is alive!! I was worried about you-and YES im still coming after you-i just gotta learn what you already know-thanks for the Good info-first i will put the cams to stock-and i will go richer in boost-and for christmas im getting upgraded fuel system-just found out from the person i bought the greddy system-that the wastegates have 24lbs springs!! so im replacing them with 12lbs springs and bought a boost controller-once i get it all figured out there is a 350z that needs his *** kicked by a g35-but keep giving me info just dont be so harsh-im very sensitive