you need a good tune to start with... trust me... I have proven it a handful of guys with previously tuned cars( back to back on the spot).. they are not all the same... 2nd gear pop out is a bad news...
markski

 

im on a revo tune now. im not going to spend $2000 on a tune, not be happy and have to tune the car again when i put the k24's in. so for now ill just rock this until i tune it with the k24's.



here are my straight pipes. no codes with ebay o2 extenders. no codes after about 750 miles anyways.

 

If you're going to stick with the K24s as is, I have a set for sale. PM me if you're interested?

-V

 

Can you have more straight pipes made? Can you submit a picture of the exhaust from the rear of the car? Any drone with this setup?

 

If you are running straight pipes with stock k16's, you're probably hurting your performance. I did that with mine, HP went down.

 

im sure i can yes. drone....... um well i just drove the car from albany to AC and back, wasnt too bad but im use to a loud Z06.

as for hurting HP...... not sure that is possible with a turbo car. this isnt NA where scavange matters. this is get the exhaust out as fast as possible!

 

Compared to that Z06, I'll bet your trip was downright peaceful.

Regarding BHT's comment though...? There are a few dudes on here that if they speak, I listen and learn. BHT is one of those dudes. And if he's got experience to share with K16s and straights, that might help you. At least until you buy my K24s.

Cheers,
-V

 

as i trust you...... i will fight this tooth and nail.

with an NA cars utilize velocity, not back pressure to aid in the scavange of the other cyclinders. where as if u go too big and "straight pipe" an NA car, you can and will lose this scavanging effect.

throw all this out for a turbo car as this is all done pre-turbo, aka header. you want the least back pressure possible. the general rule of thumb for turbo exhausts post turbo is bigger is better.

 

Some if the tuners will let you use their tunes for a week or so and offer money back.

I had a canned tune at one point. Markski transformed the car.

And you'd have to talk with him, but sometimes there are mods you can make and the tuner can adjust things accordingly. It's worth talking to him at least. There's no downside to you to make him "prove it".

 

interesting. ill have to look into it. thanks man!

 

At low rpm a turbo engine has zero boost and acts as a NA engine. The lost tq and hp with these straight pipes is because they are too short. Build yourself long lenght straight pipes like the Protomotive style set-up and you'll gain tq and hp because of the better scavaging effect.

 

wrong! you do not need scavanging with turbos. im sorry, do your reasearch.

 

Just sharing my 30 years experience in building street and race exhausts.

 

well i appreciate it man, i really do but its fluid dynamics.

less pressure downstream of the turbine is good. this will minimizes the time to boost and will improve throughout the rev range. Think about it, larger downpipe, faster spool.......

 

You're 100% correct but I was referring to low rpm. You'll gain hp and tq between idle and 2000 rpm with long lenght straight pipes versus your short straight pipes. Makes the car run smoother on the street.