Hi there, me again.
So yeah its time to start doing some real mods to my ZL1. I already have the DRs and a rotofab dry CAI. But this car is REALLY being held back by the stock tune. And in talking with several shops it looks like a tune only is not going to cut it since you really need to disable cat over temp protections to make decent power.
You know what that means. Headers. Those are NOT CHEAP for this car. 2" American Racing headers and an offroad X is $2500. Then I will be lowering boost, so to make up for it I need a lower pulley.
The best I have been getting with trusted shops in my area are $6700 installed for those headers, lower pulley, plugs/wire and street/dyno tuning.
That should net 60-80 to the wheels. The car is still going to need a TCM swap to be able to tune the trans. So we are hard capped around 700 to the tire because the TCM will step in and close the throttle if you go beyond a calculated tq value it has.
Does this seem worth it? Stock these make 560ish to the tire and after should make 620ish maybe 630. But these are all foundational mods that are needed for the next steps. Being cam, heads and maybe a maggie or whipple.
E85 is nowhere near me so thats not really an option. Im just struggling with crossing this bridge for that much money for 60hp, even though its necessary for more power.
Opinions?
So yeah its time to start doing some real mods to my ZL1. I already have the DRs and a rotofab dry CAI. But this car is REALLY being held back by the stock tune. And in talking with several shops it looks like a tune only is not going to cut it since you really need to disable cat over temp protections to make decent power.
You know what that means. Headers. Those are NOT CHEAP for this car. 2" American Racing headers and an offroad X is $2500. Then I will be lowering boost, so to make up for it I need a lower pulley.
The best I have been getting with trusted shops in my area are $6700 installed for those headers, lower pulley, plugs/wire and street/dyno tuning.
That should net 60-80 to the wheels. The car is still going to need a TCM swap to be able to tune the trans. So we are hard capped around 700 to the tire because the TCM will step in and close the throttle if you go beyond a calculated tq value it has.
Does this seem worth it? Stock these make 560ish to the tire and after should make 620ish maybe 630. But these are all foundational mods that are needed for the next steps. Being cam, heads and maybe a maggie or whipple.
E85 is nowhere near me so thats not really an option. Im just struggling with crossing this bridge for that much money for 60hp, even though its necessary for more power.
Opinions?
