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Getting knock wtf, please i need advice

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boost97gst

10+ Year Contributor
3,034
137
Apr 2, 2012
st jacob, Illinois
Ok, hears a 2nd and third pull. Not wot cause i started seeing the cel flicker from knockret. Im not really hitting 32psi either. Its closer to around 27 max. Ive still got a little bit of mafcomp work to do but i feel it pulls harder when leaner so im thinking of taking some time out of the DA tables and targeting 11:1. But im knocking at 10.8.
93octane fuel
All mods up to date
Should i start adjusting timning or am i messed up elsewhere.
Btw, BOV is vented, i know it runs rich for a split second and i dont care that much. It idles great so please, help where necessary.
thank you

edit: Ive REALLY been considering switching to e85, this may be my time. I feel there should be more power with my setup. Would you guys say i can go ahead and make the switch? I know i can run more timing and higher boost with ethanol and i have a station 15 miles away. This is not a DD just a weekend car, or something i hop in to run to the gym and back
 

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You shouldn't be knocking like that on the Evo timing map.

Have you verified your base timing with a timing light?

Whats the condition of your knock sensor? Too loose, tight, oozing black goo?
 
927 psi is a little much with iat temps at 110* and coolant temps around 210 degrees. I bet if you took 20 degrees off both you those you can get this tune to work

What AFR during spool up(where you start knocking.)
 
You shouldn't be knocking like that on the Evo timing map.

Have you verified your base timing with a timing light?

Whats the condition of your knock sensor? Too loose, tight, oozing black goo?

No, im a 2g. I didnt think i needed to verify base timing. You are speaking of spark timing, right? The machinist assembled the engine, i double checked the timing marks on the crank/cams, dead on perfect. He also installed the head and cams along with the CAS. But, this is news to me that 2g CAS's could even BE adjusted. Guess im still a bit of a noob.
As far as my KS, yes when i installed it after the last rebuild i noticed some goo on it. It is tightened down good though. You think i should replace it? I dont seem to be getting any phantom knock(atleast that i know of, LOL) so i assumed the KS was doing its job and reporting knock accurately.

Another thing, i have stock compression on a 2g, so obviously i cant run timing like 1g guys. But i thought it was still conservative. Maybe the other guys right and 27psi is too high on 93. Its not a small turbo, thought i could hit 30 on pump. Hell ive seen dynos on pump with huge numbers and slightly larger turbos.

Looks like spool up starts at 13.5 and right when the knock comes in its at 11.2

Oh yea, ambient temps were around 103 today! So temps off the road had to be very high as well. As far as my temps, yea i dont like them either. Im going to do some ducting and a low temp thermostat soon.
 
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Try getting rich first and bring it up lean to your target. I feel rich spool is a little more forgiving than the lean spool
 
Yes I was referring to ignition timing. I'm not sure how to adjust it on a 2G, but I would at least verify it is at 5* BTDC.

I agree that 27psi is pretty high on pump, but I was running pretty high boost on pump and 9:1 CR. This was on an 18g and I was probably only flowing 42-44lb/min then. However, you are only seeing 5-8* of timing and I was running 18-19 without knock. Coolant temps around 180* and IATs about 5* above ambient.

Get your coolant temps down. Click "activate fans full on" under the misc tab.

And yes, switch to E-85 if you can! You will run out of inj pretty quick though. I started by blending it 50/50 with pump. I am still able to run 950s and 35 psi boost on my HX-35! I am out of inj now...
 
Yes I was referring to ignition timing. I'm not sure how to adjust it on a 2G, but I would at least verify it is at 5* BTDC.

I agree that 27psi is pretty high on pump, but I was running pretty high boost on pump and 9:1 CR. This was on an 18g and I was probably only flowing 42-44lb/min then. However, you are only seeing 5-8* of timing and I was running 18-19 without knock. Coolant temps around 180* and IATs about 5* above ambient.

Get your coolant temps down. Click "activate fans full on" under the misc tab.

And yes, switch to E-85 if you can! You will run out of inj pretty quick though. I started by blending it 50/50 with pump. I am still able to run 950s and 35 psi boost on my HX-35! I am out of inj now...[/QUO

Point taken. I would take for granted timing is on. Its set on a 2g, non adjustable.
9:1 comp, pump and 18 degrees?? Damn boy. Nice.

Even with 1000ccs i think i could pull more power out of e85, i should be able to hit 400 with eth

Ill also try richening up the spool, that cant hurt.

ALso, on a 100+ degree day i know im not gonna have the best IATs on a sun soaked asphalt road, but as far as coolant temps, the fans were on full i believe. The ac was on. If i duct my fmic to condenser-radiator will a stock tstat even get to 180 or 190? Im thinking i need a 160 degree tstat in the summer, bare minimum. Maybe a 140 even.

Just checked 3rd gear pull section, i dont have alot of room to richen it there. It goes rapidly from 13 to 10.9 by the first knock counts at only roughly 19psi
 
I use a 160 deg thermostat and I can maintain coolant temps of 158-165 while cruising or at WOT with both fans on. I have one pusher and one puller fan both wired to the high speed fan relay so I can run them on full when I want. I have no ducted setup and use a fluidyne radiator and I have no problem holding these temps. My car is used only in the summer months and I use approximately a 65% water 35% coolant mix. I also am at 31-32 psi on 93 octane with 0 knock. I would say if you lower your coolant temps and intake temps a bit you should be able to run 27 psi with no knock.
 
I use a 160 deg thermostat and I can maintain coolant temps of 158-165 while cruising or at WOT with both fans on. I have one pusher and one puller fan both wired to the high speed fan relay so I can run them on full when I want. I have no ducted setup and use a fluidyne radiator and I have no problem holding these temps. My car is used only in the summer months and I use approximately a 65% water 35% coolant mix. I also am at 31-32 psi on 93 octane with 0 knock. I would say if you lower your coolant temps and intake temps a bit you should be able to run 27 psi with no knock.

Thank you so much.

Stant 14077 . Just picked that up. Read a few archived threads on here and that one was suggested by sno. It seems to have worked for a few people. I DO think its a tstat problem, and if that doesnt help, ill duct it.
I want to be able to tune as well as possible on pump before i switch to e85.

Oh, and Crazyquik, i noticed youre on a 6262. Thats a step or 2 up from my turbo but if i get good life out of this one ill be buying that one next. How long have you had it and how do you like it?
 
Thank you so much.

Stant 14077 . Just picked that up. Read a few archived threads on here and that one was suggested by sno. It seems to have worked for a few people. I DO think its a tstat problem, and if that doesnt help, ill duct it.
I want to be able to tune as well as possible on pump before i switch to e85.

Oh, and Crazyquik, i noticed youre on a 6262. Thats a step or 2 up from my turbo but if i get good life out of this one ill be buying that one next. How long have you had it and how do you like it?

I've had my 6262 for about 3 years now and I think its a great turbo. Mine is a t4 housing so it's pretty laggy for a "street" turbo. If I had to choose again I would definitely get it in a t3 housing rather than a t4. But in my opinion the 6262 is one of the best street/strip turbos on the market. Fun on the streets and capable of making huge power numbers and great 1/4 mile times. Check out STM's "ricer" evo as a great example of what this turbo can do. But I would absolutely recommend this turbo. :D
 
Ambient temps came down lately. Did some night pulls and wow, what a difference. I still have to install the 170 tstat and duct work soon so i expect even better results on pump. In these cars its easy to get "power jaded". I parked it for a week, got in one 75 degree evening and just hit 20 psi in 1st and 2nd and had an ear to ear grin. I forgot how fast this thing is, its crazy LOL. I dont know hp numbers yet but theyre up there for sure. def in the 350 range i would expect from my tune and mods. I see why people go for 500+, its addictive.

90 inttemp, 193 coolant temp. Full 2nd gear to redline and 3rd to redline. Almost ZERO knock and pulls like a mule. Motherfuuuuuker. Its ALL about intake temps.. Im doing some ducting this sunday to get the fresh air up to the filter. If i had ambient inttemps i would most likely pick up a good 20HP on a 70* night. It just puuuuuuuulllls, sorry but im so damn happy this tune is working finally.
The new tstat didnt help much, it dropped highway cruising to 213 from 223 so i am forced to duct the radiator which doesnt look fun
 
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