What does it all mean??

[V8Venom]

Hey guys so if you couldn't tell I am not the most knowledgeable person when it comes to cars, I just love them. So I just put my Whipple on and I want to know if everything is where it should be at.

Cylinder Head Temp - It's usually in the 200-215 range with the highest I've seen it go is 223. From what I understand that is where I want to be at and 250 would be dangerous ranges. Can anyone confirm this information for me?

Trans Oil Temp - It's usually sitting at about 201. Is that kosher?

AIT - Usually in the 80's and 90's

AFR - Usually at 13.8-14.5 ish, give or take. Tonight I finally took it out and went WOT with it a few times and I noticed a couple of times, (not when on the throttle), it would spike from 13-14 all the way to 20 and just sit there at 20 for a good 10-20 seconds, then jump back down to 13-14, maybe 15-18 but for the most part go right back to 13-14. I did not look at the gauge when I was WOT although I believe I saw it at 11-12, which from what I understand is good. What can you tell me about this? It spiked to 20 a few times and it was mostly when I was not even on the throttle but coming down from a higher speed and at about 50-60mph.

Any information you guys can give me on these would definitely help. Thanks again.

Mike

Sponsored

 

[jasonstang]

Cylinder head temp should be around 200-220 when warmed up
Transmission fluid temp mine is around 200 when fully warmed up
Air Intake Temp is depending on you ambient temperature obviously
Air-fuel ratio should be around 14 unless you are doing engine braking i.e. letting of the gas pedal at speed
At WOT some tunes like to run it richer to be on the safe side

 

[V8Venom]

Cylinder head temp should be around 200-220 when warmed up
Transmission fluid temp mine is around 200 when fully warmed up
Air Intake Temp is depending on you ambient temperature obviously
Air-fuel ratio should be around 14 unless you are doing engine braking i.e. letting of the gas pedal at speed
At WOT some tunes like to run it richer to be on the safe side

Yea I just figured out that 20 would be no worries when letting off the gas and the engine is braking. Richer would be higher correct? Better rich than lean right?

 

[GTBOB]

Yea I just figured out that 20 would be no worries when letting off the gas and the engine is braking. Richer would be higher correct? Better rich than lean right?

Richer would be numerically lower.

 

[V8Venom]

From what I understand 11-11.9 would be the area I want to be in while in boost. Correct?

 

[jasonstang]

From what I understand 11-11.9 would be the area I want to be in while in boost. Correct?

Yes, 14 means 14:1. 1 part of fuel and 14 part of air.
When you boosting, richer is safer. 12 is pretty good for longevity and performance.

http://www.autospeed.com/cms/article.html?&title=Tuning-AirFuel-Ratios&A=1595
"Bosch state that most spark ignition engines develop their maximum power at air/fuel ratios of 12.5:1 - 14:1, maximum fuel economy at 16.2:1 - 17.6:1, and good load transitions from about 11:1 - 12.5:1. However, in practical applications, engine air/fuel ratios at maximum power are often richer than the quoted 12.5:1, especially in forced induction engines where the excess fuel is used to cool combustion and so prevent detonation."

Sponsored