how much rwhp from long tube headers? stock motor
11-23-2005, 11:24 PM
#4
Drifting
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B&B shorties will get you 8-10 hp on a C5, pacestters have gotten 10-12 and jba, bbk the same, all have carb#s, these numbers are on stock motors, heads cam will show greater gains.Shorty headers, a decent catback and a CAI will net you 30-35 horsepower.These are jet-hot coated pacesetters and cost me $375 total to my door, the other iitems were used only 200 miles and cost me $200 to my door that included the valve spring tool, ZO6 valve springs,1.8 Harland Sharp rockers gaskets and titanium retainers. anyone can spend big bucks to make their ride quicker, I believe in getting the most bang for my buck.
11-24-2005, 08:11 AM
#6
Team Owner
I got 25 HP with my QTP Stainless Tri-Y's. A lot will depend upon how lean the tuner makes the car, I had well over 30 HP but he added more fuel for street driving so I wouldn't be too lean. It was a noticable gain, not only down low but it made 6th gear much more usable.
11-24-2005, 10:04 AM
#7
Le Mans Master
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St. Jude Donor '12-'13-'14
Originally Posted by chriswtx
long tubes on a stock car without a tune will see 15-20rwhp, shorties will gain you nothing... 
If someone tells you your getting much more that 15-20 RWHP, I think they are BSing you.
11-24-2005, 10:18 AM
#8
Tech Contributor
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CI 6,7,8,9,11 Vet
St. Jude Donor '08
20-30 HP and your probably going to need to improve the induction system (blackwing, vararam, ect ect. ) to get the most out of your headers. Oh, yea,,,your probably going to need a tune to get the best performance.
My rule on selecting the exhaust is, dont select one that you have not listen to in someone elses car! If you get one that you think that you will like and then dont like, you will be sorry! The in cabin resonance that some exhaust systems produce is terrible! On the other side of the coin, if your looking for LOUD and get one that is too quiet, that could drain your wallet also.
If you post on the forum that your looking for someone in your area that has an aftermarket exhaust that you can listen to, I'm sure you will find someone and a system that you just LOVE!!! Look in the regional section and post there too.. I know too many people that have had 3-4 systems on their car before they found the right one!
I have an open offer to anyone in the north east area that would like to take a ride and listen to my Stainless Works system!
Bill C
My rule on selecting the exhaust is, dont select one that you have not listen to in someone elses car! If you get one that you think that you will like and then dont like, you will be sorry! The in cabin resonance that some exhaust systems produce is terrible! On the other side of the coin, if your looking for LOUD and get one that is too quiet, that could drain your wallet also.
If you post on the forum that your looking for someone in your area that has an aftermarket exhaust that you can listen to, I'm sure you will find someone and a system that you just LOVE!!! Look in the regional section and post there too.. I know too many people that have had 3-4 systems on their car before they found the right one!
I have an open offer to anyone in the north east area that would like to take a ride and listen to my Stainless Works system!
Bill C
11-24-2005, 12:37 PM
#9
Melting Slicks
Stick with the longtubes. Also, best to get a tune afterwards to get all the available power from them. On my 01 coupe, 6spd after a tune I ended up with 339 hp and 350 tq. This is with 4:10's, so those numbers could be around 5 better than they are. Also, AFR was at 12.8 on WOT. 
11-29-2005, 09:22 AM
#10
Melting Slicks
Couple comments here...
I'm no Fan of LGM, but I do have his headers on my car... My car has been dyno'ed THREE times (last two times we did LS1 edits after baseline pulls)... The first time with just a Borla XR1 catback and a Cold air kit, and the 99C5 coupe saw 296HP and 301#ft. of torque. About 8 months later I put on a LS6 intake, shaner ported Tbody, LG LTs and a custom 3 inch exhaust. With a LS1 Edit tune I put 335HP and 353#ft. of torque down with a roadrace friendly tune.
Since I've done a new heads/ cam motor I've gone back and had a new LS1 Edit tune. I'm now pushing 375HP and 370#ft. torque to the wheels.
Long tube 1 3/4 primaries from anyone out there should get you around 20-25HP with a tune. 15-20 without a tune, but you'll probably run a bit rich.
Mike
I'm no Fan of LGM, but I do have his headers on my car... My car has been dyno'ed THREE times (last two times we did LS1 edits after baseline pulls)... The first time with just a Borla XR1 catback and a Cold air kit, and the 99C5 coupe saw 296HP and 301#ft. of torque. About 8 months later I put on a LS6 intake, shaner ported Tbody, LG LTs and a custom 3 inch exhaust. With a LS1 Edit tune I put 335HP and 353#ft. of torque down with a roadrace friendly tune.
Since I've done a new heads/ cam motor I've gone back and had a new LS1 Edit tune. I'm now pushing 375HP and 370#ft. torque to the wheels.
Long tube 1 3/4 primaries from anyone out there should get you around 20-25HP with a tune. 15-20 without a tune, but you'll probably run a bit rich.
Mike
11-29-2005, 09:28 AM
#11
Safety Car
Originally Posted by chriswtx
long tubes on a stock car without a tune will see 15-20rwhp, shorties will gain you nothing...
have you run shorties to get this figure or are you just speculating? I have B&B shorties and though I didn't have a dyno tune...I picked up considerable time in the 1/4 mile with them...so saying they gain you nothing I think is a bit harsh...saying they are not as good as long tubes may be a better way of stating this...a lot of SMOG guys have to run shorties to meet the State's regs...they are direct bolt in and are made very well...especially if you find a used set like I did...great mod over stock if you can't go LT's.
2 cents deposited...
Last edited by byte_me; 11-29-2005 at 10:33 AM.
11-29-2005, 11:59 PM
#13
Le Mans Master
Originally Posted by byte_me
have you run shorties to get this figure or are you just speculating? I have B&B shorties and though I didn't have a dyno tune...I picked up considerable time in the 1/4 mile with them...so saying they gain you nothing I think is a bit harsh...saying they are not as good as long tubes may be a better way of stating this...a lot of SMOG guys have to run shorties to meet the State's regs...they are direct bolt in and are made very well...especially if you find a used set like I did...great mod over stock if you can't go LT's.
2 cents deposited...
2 cents deposited...
Exactly.. Here comes the "army of shortie haters" once again. All speculation, no facts to back them up (but we do). If I had paid $1400.00 for a set of bent SS tubes, I'd probably diligently defend them as well.
11-30-2005, 07:32 AM
#14
Melting Slicks
OK, for all the cussing, fussing, and generally HATING the removal and install of my long tubes when I need to fix something that breaks, WHAT do Shorties give you? I haven't personally seen any numbers posted so I'm all ears... 
Mike
Mike
11-30-2005, 08:09 AM
#15
Safety Car
Originally Posted by Mikelly
OK, for all the cussing, fussing, and generally HATING the removal and install of my long tubes when I need to fix something that breaks, WHAT do Shorties give you? I haven't personally seen any numbers posted so I'm all ears...
Mike
Mike
The guy I bought mine from had them on a 99 coupe and dyno'd 12 HP gain to the rear wheels with those alone...so figure about half of what long tubes offer...for $400 bucks used and being direct bolt on...that's not bad money spent on a per horsepower basis.
11-30-2005, 10:21 AM
#18
Melting Slicks
I got my LG LTs for $650 used, but then ponied up an extra $1400 for the SLP hi-flo cats and custom made exhaust/ mufflers. I'd just use Z06 manifolds if I had it to do over again, ONLY for the ease of maintenance and repair work access...
In 2 years I've done a lot of work on my car, from swapping clutches, replacing rear diffs, rebuilding torque tubes to replacing the motor... Every time the headers have been a royal pain to deal with... Remove the studs, remove the spark plugs (Or risk breaking them
) and remove the headers from top and bottom (one each) and although I am now adept at pulling them in 1.5 hours, it isn't something I'm proud of...
Good to hear shorties are worth something!
Mike
In 2 years I've done a lot of work on my car, from swapping clutches, replacing rear diffs, rebuilding torque tubes to replacing the motor... Every time the headers have been a royal pain to deal with... Remove the studs, remove the spark plugs (Or risk breaking them
) and remove the headers from top and bottom (one each) and although I am now adept at pulling them in 1.5 hours, it isn't something I'm proud of...Good to hear shorties are worth something!
Mike
11-30-2005, 12:40 PM
#19
Melting Slicks
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St. Jude Donor '05-'06
from my experaince with my car mods vararam, 295 35 bfg dr, dynoed on kuhmo v700 305 30s, stingers:
before/ after
340rwhp/375rwhp
340rwt/371rwt
best 1/4 12.33 @ 115 in dec 04, aaprox 40 degrees 11.89 @ 118.9, no tune, Feb 6 05 approx 40 degrees, W/ LG LTS, no cats, same tires, same 60 1.83 :o tuned (gained 5 HP peak with tune, same torq gains, but the below torq gain with tune was as much as 10 ft lbs...)
deltas:
+35 RWHP
+31 RWT
-.44 ET in the 1/4
+3.9 MPH in the 1/4
BLUFF and IMO, a good set of LTs are a great mod and gains depend on what tool you measure your gains with. DYNO gains, you could probbaly gain more with a big cam, def more with HC swap. At the track, I think a >.4 gain is pretty hard to beat for the cost. You could do the same with a gear swap. Plus, and this is MY opinion only, a LT swap wakes the car up so much on the street with improved throttle response and most importantly, SOUND and FUN.This has been talked about a ton here and it is great for us to share our experiance and opinions. Good luck!
Dave
before/ after
340rwhp/375rwhp
340rwt/371rwt
best 1/4 12.33 @ 115 in dec 04, aaprox 40 degrees 11.89 @ 118.9, no tune, Feb 6 05 approx 40 degrees, W/ LG LTS, no cats, same tires, same 60 1.83 :o tuned (gained 5 HP peak with tune, same torq gains, but the below torq gain with tune was as much as 10 ft lbs...)
deltas:
+35 RWHP
+31 RWT
-.44 ET in the 1/4
+3.9 MPH in the 1/4
BLUFF and IMO, a good set of LTs are a great mod and gains depend on what tool you measure your gains with. DYNO gains, you could probbaly gain more with a big cam, def more with HC swap. At the track, I think a >.4 gain is pretty hard to beat for the cost. You could do the same with a gear swap. Plus, and this is MY opinion only, a LT swap wakes the car up so much on the street with improved throttle response and most importantly, SOUND and FUN.This has been talked about a ton here and it is great for us to share our experiance and opinions. Good luck!
Dave
