Are my headers hurting my performance?

[jawsgt]

I've got a set of stainless works 1 3/4 headers with a 3 in. collector on my stock 10 gt. and after being pissed off as to the reason why this car is slower than my 07 with similar mods i think ive narrowed it down to possibly the the larger size headers. I also dont have an x or an h-pipe just connecting pipes. would i benefit from down sizing my headers?

 

[Scord]

Those are very large headers for a almost stock car... Are you planning on going with a supercharger at one point?

 

[19COBRA93]

They could certainly be effecting your torque.

 

[marcspaz]

Those headers are way too big. If you had a really agressive cam and P&P heads along with some other high airflow mods, you would have been ok. Also, and X or H pipe is a MUST for these cars.

The H pipe makes about 4-5 more ft lbs of torque compared to an X, but most people go for the X due to sound and the few extra HP, not tq.

Honestly, LT's are a supporting mod, not a primary mod.

 

[Gray Ghost GT]

Those headers are way too big. If you had a really agressive cam and P&P heads along with some other high airflow mods, you would have been ok. Also, and X or H pipe is a MUST for these cars. Honestly, LT's are a supporting mod, not a primary mod.

+1 Based on your current setup the 1 5/8" LT headers would be ideal, but if you plan to make substantial performance upgrades, then hold on to them and just realize you'll "grow into them".

 

[doodad]

I would simply leave the stock headers on and get other mods to the car. Headers should only be added, 1: you want sound, 2: you are making big power and stock manifolds just dont cut it and restricts the power. at bolts on level, stock maifords are more than enough IMO.

 

[UltraKla$$ic]

Those headers are way too big. If you had a really agressive cam and P&P heads along with some other high airflow mods, you would have been ok. Also, and X or H pipe is a MUST for these cars.

The H pipe makes about 4-5 more ft lbs of torque compared to an X, but most people go for the X due to sound and the few extra HP, not tq.

Honestly, LT's are a supporting mod, not a primary mod.

Absolutely. This man speaketh the truth.

My car woke up totally when I put my cams in to complement my full length exhaust. TOTALLY different car now.

One must have a gameplan when modding these things that complement each other. Just throwing parts at it can definitely cause ill-effect.

 

[Riptide]

I thought the X made more power than the H?

 

[19COBRA93]

I thought the X made more power than the H?

It does, HP. Not low end torque.

 

[chad05gt]

chalk it up as a great purchase to 'grow' into... it'll allow you to get the most out of future mods.

 

[dkingfrank214]

This is exactly what has been going through my head the past week,I thought maybe my tranny was f'ing up but maybe its just that I lost torque.also,does ur a/c not work that great after the header installation?

 

[marcspaz]

This is exactly what has been going through my head the past week,I thought maybe my tranny was f'ing up but maybe its just that I lost torque.also,does ur a/c not work that great after the header installation?

There is no direct relationship between the A/C and the exhaust. As long as you didn't cause a leak while working on it, there should be no difference.

 

[3vs197]

wait, you dont have a mid pipe? thats probably worth 10hp right there because of the scavenging.