till I can save up to get them installed and tuned at the same time. 
Thorley Header Project Update
a bigger converter is not necessary unless you swap the cam and get slicks.
I was gonna have an exhaust shop put them on for me,but they wanted $600 flat for install.so since easter is around the corner,ill be installing them in 2 week at my bro house(save my self $600).
Just got to get new gaskets and header bolts,rather not put the stock gaskets or bolts.once I get the headers in ill have my exhaust done and be set to be a family car with *****...
Just got to get new gaskets and header bolts,rather not put the stock gaskets or bolts.once I get the headers in ill have my exhaust done and be set to be a family car with *****...
The trans fill tube is a bitch so take your time
wow why is everyone wasting money on gaskets? The gaskest we have are muti-layer metel that are also embossed? Theres no need for it ask nick at DT he will tell you the same thing.
a stall is not going to "move" the power band, it just lets the engine rev higher. Why would you want to rev the engine higher with a stall on street tires? Most people can't get traction with the stock stall using street tires, let alone using a bigger one. Your just going to spin your tires. That stock stall is perfect for the power range of the engine. Unless you change something that affects the powerband ike the cam, the power range isn't going to change much.
Last edited by JDMC5; Apr 1, 2010 at 03:17 AM.
On The Tree
Joined: Oct 2006
Posts: 130
Likes: 0
Well y'all,
Installing headers today. So excited I could almost sh*t!!!!!!! Like everyone else, will post up here later will my thoughts and impressions.....
Alabama....
From your quote above sounds like u got your tune done.... If so, give us the scoop.... (New characteristics, changes, yada, yada....)
Installing headers today. So excited I could almost sh*t!!!!!!! Like everyone else, will post up here later will my thoughts and impressions.....
Alabama....
From your quote above sounds like u got your tune done.... If so, give us the scoop.... (New characteristics, changes, yada, yada....)
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Well y'all,
Installing headers today. So excited I could almost sh*t!!!!!!! Like everyone else, will post up here later will my thoughts and impressions.....
Alabama....
From your quote above sounds like u got your tune done.... If so, give us the scoop.... (New characteristics, changes, yada, yada....)
Installing headers today. So excited I could almost sh*t!!!!!!! Like everyone else, will post up here later will my thoughts and impressions.....
Alabama....
From your quote above sounds like u got your tune done.... If so, give us the scoop.... (New characteristics, changes, yada, yada....)
a stall is not going to "move" the power band, it just lets the engine rev higher. Why would you want to rev the engine higher with a stall on street tires? Most people can't get traction with the stock stall using street tires, let alone using a bigger one. Your just going to spin your tires. That stock stall is perfect for the power range of the engine. Unless you change something that affects the powerband ike the cam, the power range isn't going to change much.
Maybe I should just contain myself. It seems like we have a lot more mods that are finally starting to develop for the LS4 that actually make power now
Staging Lane
Joined: Mar 2008
Posts: 88
Likes: 0
From: Fairport, NY
Staging Lane
Joined: Nov 2009
Posts: 72
Likes: 0
Was that 224hp rating an actual baseline, meaning no mods, for the car? Or was it with one or two mods already in place?
I don't know how much hp we lose getting from the engine to the tires, but I did some calculation. If your 224hp was a baseline, with no mods, that is 73.9% (I'll round to 74%) of the factory 303 hp rating. Assuming you lost the same percentage of power with the 276 hp rating, I calculated 372.98 hp (round to 373). How close am I?
Also, what do you suggest for those of us who don't live near a shop that can dyno tune stuff?