Burnin HOT Side Sills

[Dimitrios]

whats causing my side sills to burn up and start to smoke? had the sills painted 2 weeks ago and the sills turn brown again. also i believe my metal substrate cats are done with again just after few months. this is the third set of HF metal sub cats in just 2 years. is it possible its the tune?

 

[ViperJoe]

That is HOT!
You are running real rich which will cook the cats and the sills

 

[KepRght]

you are running WAYYYY rich. you need a tune.

cats get hotter when they burn excess fuel.

 

[Mccarlin]

Straight pipes are your friends

 

[big-n-italian]

Straight pipes are your friends

unless you are a neighbor.

 

[Mccarlin]

Straight pipes are your friends

unless you are a neighbor.

haha, there are enough muscle cars around here to make the viper sound like a kia.

 

[KepRght]

i wont say anything about the environment because most people who drive their vipers put 10 miles on per year. for those that drive it daily, please consider high flow cats to spare the air. no one out side of smog ridden California really gives a hoot but studies from the 60's until now show huge positive changes in air quality since the stricter standards have been enforced. pictures from the late 70's in the bay area you couldnt even see across the bay because of smog. now you can see out to the ocean. enough preaching. keep the high flow cats if you drive alot & get her tuned so she doesnt run rich & hot.

 

[Dimitrios]

this is my current tune. if i pull fuel out of the VEC2 wouldnt i detonate? i do detonate sometimes at temps over 85 degrees

Fuel rpm table Ignition rpm table Boost rpm table
RPM % RPM % RPM %
000 00 000 00 000 00
500 44 500 00 500 00
1000 81 1000 -42 1000 00
1500 102 1500 -92 1500 17
2000 102 2000 -95 2000 26
2500 106 2500 -100 2500 48
3000 103 3000 -88 3000 58
3500 100 3500 -70 3500 65
4000 91 4000 -17 4000 70
4500 94 4500 -20 4500 70
5000 94 5000 -42 5000 75
5500 94 5500 -70 5500 84
6000 94 6000 -100 6000 95
6500 94 6500 -100 6500 100

 

[Nadine UK GTS]

D; you need different progs/cards for temps and gas ratings, I've sent most of summer here chasing them!

Good luck!

 

[KenH]

As Nadine pointed out, you pretty much need a different tune once temps get over about 85. I have to pull a lot of fuel out of mine or it doesn't even run right (cuts out) at higher temps.

I can't really make out the table you listed, but it looks like you are pulling timing out across the entire RPM range which seems odd with your setup. That could also cause you to run on the rich side.