sts questions and concerns
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Staging Lane
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From: Southern Wisconsin
sts questions and concerns putting an sts t67 kit on my 2000 ls1. looking at swapping cam and heavily considering/looking for a 02-04 ls6 cam for sale. I have 1 3/4 longtubes on there now and wondering how much ill really benefit with putting stock manifolds on there being that its a 6 speed car if im racing someone it wouldnt ever be below 4000 rpm other than a launch on the street...also considering and looking for a good set of 317's for sale??? then meth kit, ls2 intake, 90mm throttle body, 60 lb injectors, dual in tank fuel pumps...looking for any cam or other part suggestions looking to make 550-625rwhp ne suggestions would be greatly helpful! thanks, Tyler
Joined: Jun 2004
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From: Ft. Irwin, California (But Virginia is home)
putting an sts t67 kit on my 2000 ls1. looking at swapping cam and heavily considering/looking for a 02-04 ls6 cam for sale. I have 1 3/4 longtubes on there now and wondering how much ill really benefit with putting stock manifolds on there being that its a 6 speed car if im racing someone it wouldnt ever be below 4000 rpm other than a launch on the street...also considering and looking for a good set of 317's for sale??? then meth kit, ls2 intake, 90mm throttle body, 60 lb injectors, dual in tank fuel pumps...looking for any cam or other part suggestions looking to make 550-625rwhp ne suggestions would be greatly helpful! thanks, Tyler
Lots of cam choices. Check with Patrick G for a spec. A lazy route is you could buy my old STS cam
Still have the Comp 228/228 .588/.588 116LSA cam I used on the car w/ 317 heads. PM if interested. Even have the cam card.Check posts by Zombie, LongRange4U (and myself if you get bored). Lots of STS info that can help ya' out.
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Staging Lane
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ic ic...now will switching from the lts to the manifolds hurt my peak power and how much quicker will it spool with the exhaust manifolds?? im mainly wondering if there is an overall power GAIN ill get from the manifolds and if so how much? i really dont want to wrap my headers or exhaust because ive heard that after a lil while by keeping all that heat in on that thin of metal it will rust right through everything. also ive heard that the meth kits are more efficient on sts kits?? is this true or do most run intercoolers?
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Staging Lane
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Hey man jw if you switched to the manifolds after your dyno because in an old thread that you posted when you had your car dynoed you had the LTs on your car? jw if you did cuz you should know better than neone what the difference would be....thanks, Tyler
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Joined: Jun 2004
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From: Ft. Irwin, California (But Virginia is home)
You can run coated LT's...but you will get some lag. I had coated DynaTech LT's....but that's because my wife accidently gave away the stock manifolds at a garage sale
I made full boost by 3500RPM in 1st, 3000RPM in 2nd, and 2500RPM in 3rd and above. It probably would have been 500RPM faster in every gear with the stock ones. LS1 Tech Stories
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Staging Lane
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From: Southern Wisconsin
The reason the stock cast manifolds are better is as said, they decrease turbo lag (increase spool...however you want to say it.) The faster you begin making boost, the faster you make power. End result, more power under the curve. Might not help the peak #'s....but it'll get the car down the pavement a lot faster.......which is the real point in the end.
You can run coated LT's...but you will get some lag. I had coated DynaTech LT's....but that's because my wife accidently gave away the stock manifolds at a garage sale I made full boost by 3500RPM in 1st, 3000RPM in 2nd, and 2500RPM in 3rd and above. It probably would have been 500RPM faster in every gear with the stock ones.
You can run coated LT's...but you will get some lag. I had coated DynaTech LT's....but that's because my wife accidently gave away the stock manifolds at a garage sale
I made full boost by 3500RPM in 1st, 3000RPM in 2nd, and 2500RPM in 3rd and above. It probably would have been 500RPM faster in every gear with the stock ones. yes, that is an old dyno graph from when i first put the kit on and it had the LT's.. the difference is well worth the switch. I can tell that the car runs much smoother/stronger, but it is also MUCH louder
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From: Ft. Irwin, California (But Virginia is home)
Ok yea i understand that but now you couldnt you decrease turbo lag in other ways...say with longtubes you run into the 3inch Ypipe and single 3 inch all the way back to the turbo and then go like 2 1/4-2 1/2 inch pipe which would be forcing that same amount of air from a big pipe into a smaller dimension pipe increasing heat and velocity to make the turbo spool quicker??? Because really the reason you would rather run stock manifolds is because the exhaust ports on the manifolds is smaller than the 1 3/4 in headers speeding up air flow as in almost a restriction? also i know the manifolds do hold the heat better but i would be making more heat by shoving that 3inch into a smaller pipe right before it spools the exhaust housing....what ya think about that? btw thankyou for all the input from everyone so far!!!
In short, heat retention is what you want. Long tube headers have too much surface area to maintain heat. Coating helps, but it's not as good as stock cast manifolds.