longtube headers w/o tune= problems? help please!!

[hmorris7000]

i wanted to know if i put lt on my car without a tune would i tear something up on my car? any help will be appreciated thanks!!!!

[blue02Z]

def. not. i ran mine for a year without a tune and no probs. just runs a lil rich

[shady milkman]

no your fine...it will run real rich..however dont not get a tune..you should get one as soon as possible..or else you run the risk of running rich...

[35thAnniZ28]

you could if your not careful...while your unbolting the manifolds off...your going to have to unbolt the starter and air...while your down their you might as well install the prothane motor mount bushings,many people complain about the header rubbing against the frame...

[hmorris7000]

what does running rich mean or do? thanks guys your life savers how much do u gain with the lt's w/o tune? with tune? i want a tune but there are no tuners in alabama im probably gonna have to go to ga or fl to get a tune which sucks but wanted to know if i would be ok for a while without a tune

[blue02Z]

you could if your not careful...while your unbolting the manifolds off...your going to have to unbolt the starter and air...while your down their you might as well install the prothane motor mount bushings,many people complain about the header rubbing against the frame...
you dont have to unbolt your starter and air system



what does running rich mean or do? thanks guys your life savers how much do u gain with the lt's w/o tune? with tune? i want a tune but there are no tuners in alabama im probably gonna have to go to ga or fl to get a tune which sucks but wanted to know if i would be ok for a while without a tune

running rich just means burning more fuel. maybe 20 hp with no tune i would say. like i said, i ran mine for a year w/ a stock tune

[ApexVIII]

yea no problems here mine is still untuned. you will pick up some more hp and it will run a little better. but i just run a little rich.

[35thAnniZ28]

[QUOTE=blue02Z;1137839]you dont have to unbolt your starter and air system





well..made shit a whole alot easier....i meant air hoses

[dlbrando]

takes all of 30 sec to pull the starter so i reccommend it. also, before my tune with lt's I got 75 miles to the TANK, get a tune, I am back up to normal milage after, and the tuner bought me 20 hp

[blue02Z]

well..made shit a whole alot easier....i meant air hoses
thats cool, mine went in so smooth i did not need it

takes all of 30 sec to pull the starter so i reccommend it. also, before my tune with lt's I got 75 miles to the TANK, get a tune, I am back up to normal milage after, and the tuner bought me 20 hp

holy sh!t!!!!!!!!!!!! were you driving with the pedal on the floor. before my tune i drove from here to yellowstone and averaged 32mpg, the whole trip! no joke. i really dont see how you only got 75 miles to the tank, that amounts to like 4.5 mpg

[96z28]

yeah thats kind of insane. you sure it was 75 to the tank?

[dlbrando]

I am not sure what happened, but I definatly got around 75 to 80 on a tank, certainly no more than 100. I got it tuned after a tank and a half. And no, it was normal city driving. I drive stop and go to school work and my apt most everyday the only highway I get is when I roll around the beltline to the mall.

[02superslow]

i just put some long tube kooks headers an they ran really rich..i suggest a tune to make your car feal way better and preform better

[Blue_98_ws6]

i bought my car with hooker lts and ypipe and it definitly runs rich i dont think the guy ever had it tuned. how much do they cost? and where would i go to get one done?

[dlbrando]

call around to local performance shops, average tune is between 200 to 300 bucks, it depends on what they can do. Mine was 250.

[rel3rd]

My car must be an oddball, or I am reading this RICH after header swap thing wrong.

After longtubes and ORY...

At IDLE and light CRUISE RPM it was a little RICH out of the tailpipes because car is actually LEAN (due to headers) and pcm adds fuel to compensate.

WOT was definitely LEAN...as it should have been, since exhaust was opened up and a/f ratio is ignored by O2 sensors at WOT.

Idle and light throttle cruise were leaned out during tune, and at WOT a good bit of fuel was added to make best all around power, and to get WOT a/f ratio in check. Found pretty much 20rwhp everywhere, slightly more at peaks. (Mustang Dyno, FWIW)

[blue02Z]

I am not sure what happened, but I definatly got around 75 to 80 on a tank, certainly no more than 100. I got it tuned after a tank and a half. And no, it was normal city driving. I drive stop and go to school work and my apt most everyday the only highway I get is when I roll around the beltline to the mall.

your car is crazy then dude, my 74 built c10 with a built 350 pushing around 400 at the crank and a slippin th400 and 3.73's on the hiway gets like 12mpg. i feel sorry for you

[dlbrando]

your car is crazy then dude, my 74 built c10 with a built 350 pushing around 400 at the crank and a slippin th400 and 3.73's on the hiway gets like 12mpg. i feel sorry for you

well it is better now... tune fixed all of that

[JL8Jeff]

I did the lid, ported TB, free airbox mod and EGR tube mod and my car was adding fuel big time(LT trims were around 12.5% on the highway). I just did the longtube headers and the LT trims are down a little bit but still adding 10-12% on the highway. You guys who say they were running rich might be backwards on that thinking. More airflow with stock computer will definitely be leaner than stock. I think the ORY with no cats makes the exhaust smell and look different, but that's not running rich, it's running dirty. The 75 miles to a tank sounds like you had a dead O2 sensor and the car was running on SD or limp mode.

[dlbrando]

had 1 bad o2, but the problem persisted after the fix. the tune fixed all of it and restored my milage. Most of us can say we were running rich for sure because we had the A/F ratio checked and it was off for sure