How important are headers?
How important are headers? I am trying to work my way up to a big cam.
I have the lid/flopac, I probably wont buy a FAST, cuz thats just really expensive, so I will be keeping the ls1 intake manifold i think (unless that just screws me).
I was looking at some long tubes. Ive done the install on a 4.6 mustang (and let me tell u, there is no harder header install
) so Im not too worried about that, but time and money.... can I get away with the stock manifolds and just go right ahead to a nice cam (ms3 or so. dont want to lose my idle completely, but I want something that will give some serious power) or will I just be pissing in the wind unless I open up the airflow a little more.
thanks
I have the lid/flopac, I probably wont buy a FAST, cuz thats just really expensive, so I will be keeping the ls1 intake manifold i think (unless that just screws me).
I was looking at some long tubes. Ive done the install on a 4.6 mustang (and let me tell u, there is no harder header install
) so Im not too worried about that, but time and money.... can I get away with the stock manifolds and just go right ahead to a nice cam (ms3 or so. dont want to lose my idle completely, but I want something that will give some serious power) or will I just be pissing in the wind unless I open up the airflow a little more.thanks
Originally Posted by Grimes
you really won't realize the gains you want until you have the longtubes. However, I am interested in the results of any potential guinea pigs 
whatabout the intake manifold. any 98s out there running cams with the stock intake manifold? how much difference will that make?
Originally Posted by SpecterGT260
Me too.... someone else go do it by next friday! hurry!!!!
whatabout the intake manifold. any 98s out there running cams with the stock intake manifold? how much difference will that make?
whatabout the intake manifold. any 98s out there running cams with the stock intake manifold? how much difference will that make?
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Get long tubes and a ls6 intake first. Both can be had in the for sale section for pretty cheap. You just have to keep your eyes open. I would also suggest gears as well if you plan on going with some like the MS3
Originally Posted by RacerScott
how much more restrictive are 98 manifilds and what did they change about them in 2000?
Headers are important! Get them (and an ls6 intake) before you decide to do any internal work on the engine, to best utilize the flow characteristics of the ls1.
Cams have been installed without headers, but they are all about compromise...and won't give nearly the optimal performance.
You want the engine to b-r-e-a-t-h-e, intake and exhaust mods really open up the tq characterisics of ls1s. Adding a cam afterwards makes for that much more gain. Unless you have a compelling reason NOT to do headers (like you live in ca and want to stay 100% smog legal) first do headers.
Cams have been installed without headers, but they are all about compromise...and won't give nearly the optimal performance.
You want the engine to b-r-e-a-t-h-e, intake and exhaust mods really open up the tq characterisics of ls1s. Adding a cam afterwards makes for that much more gain. Unless you have a compelling reason NOT to do headers (like you live in ca and want to stay 100% smog legal) first do headers.
Adding a cam afterwards makes for that much more gain. Unless you have a compelling reason NOT to do headers (like you live in ca and want to stay 100% smog legal) first do headers
but now I'm going to add headers (with cats) and probably go a little bigger cam wise.If you do a cam without headers, the cam size is limited and you'll need a lot of extra exhaust duration. You can get a nice gain from the cam, but you won't be installing something like a MS3.
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Joined: Mar 2005
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From: Lincoln CA
Originally Posted by lsx24
Unless you have a compelling reason NOT to do headers (like you live in ca and want to stay 100% smog legal) first do headers.
big cams rev higher so you can stay in each gear longer.
Shorties might net you as much as 5-10 hp since you have 98 manifolds. with 2000+ manifolds, 5 HP is about it. Either way, shorties aren't going to support a MS3, TRex, etc.
Shorties might net you as much as 5-10 hp since you have 98 manifolds. with 2000+ manifolds, 5 HP is about it. Either way, shorties aren't going to support a MS3, TRex, etc.
