[soon2B300C]

Im just wondering whats you guys opinion on putting Intake and headers on for extra power but keeping the stock exhaust for the quiet ride? Anybody think the supposed extra horses will be nulled by the stock exhaust? It would be nice to get the power but without having to change the exhaust and keep the quiet.

 

[fatchance]

I have the Gibson CARB approved headers on my car with the stock exhaust. I am waiting on Gibson to relaese their cat back system. That being said, I would change the exhuast. If you are concerned about noise, I would say go with the Borla. The combo of headers and the Borla will be exactly what your looking for. I've heard and riden in cars with just about every system.

 

[jconnolly1119]

Im just wondering whats you guys opinion on putting Intake and headers on for extra power but keeping the stock exhaust for the quiet ride? Anybody think the supposed extra horses will be nulled by the stock exhaust? It would be nice to get the power but without having to change the exhaust and keep the quiet.

You'd be completely defeating the purpose of doing the mods if you kept the stock exhaust......plus your ride would be far from quiet considering the driver's position is basically right where your mods (CAI and Headers) would be

All in all, I really don't know if anyone would suggest headers without a cat-back with the appropriate diameter pipes (not that it wouldn't be possible-----just not advisable)

my suggestion........start witht the CAI, then a cat-back and see how you like the volume..........if you're cool with those, then take the step with headers

 

[FOAMAVEN]

Your biggest improvement is at the engine block. So headers even with stock exhaust will work. The cat back systems will then add a bonus to that . The borla 4 muffler system will be slightly louder then stock. I have this system and love it. I'm about ready to add the Gibson headers for hopefully a larger improvement! :wave:
p.s. The headers will not add much volume to the existing exhaust noise.

 

[WhiteDiamond]

Your biggest improvement is at the engine block. So headers even with stock exhaust will work. The cat back systems will then add a bonus to that .

There is also a thread in the SRT8 section right now about headers on a bone stock SRT8. They(GSM) got very impressive results with the headers through the stock exhaust system. I agree that your best exhaust mod is typically going to be a well designed set of headers, but you see cat-back systems done all the time due to the warranty issues. It is much less likely a service department will try to blame a cat-back for a warranty problem, but headers will probably get the nod a very large percentage of the time.

Todd

 

[deeone]

Fatchance, how do you like the Gibson headers? How was the install? I thinking about purchasing those headers.

Thanks.

I have the Gibson CARB approved headers on my car with the stock exhaust. I am waiting on Gibson to relaese their cat back system. That being said, I would change the exhuast. If you are concerned about noise, I would say go with the Borla. The combo of headers and the Borla will be exactly what your looking for. I've heard and riden in cars with just about every system.

 

[FOAMAVEN]

I have the Gibson CARB approved headers on my car with the stock exhaust. I am waiting on Gibson to relaese their cat back system. That being said, I would change the exhuast. If you are concerned about noise, I would say go with the Borla. The combo of headers and the Borla will be exactly what your looking for. I've heard and riden in cars with just about every system.

I haven't installed my Gibson headers yet and are wondering if it is worth it considering the dyno report only showed a 2HP gain!
I'm very interested in what you feel the gains are with them and any other impressions.
Thanks
:wave:

 

[WhiteDiamond]

Make sure you don't just compare the peak numbers when looking at this. The thing people seem to forget is that you feel the torque when you drive. That gives you the sensation that most associate with a fast vehicle. If headers only give you 2rwtq at peak, but they give 30rwtq or more across some portion of the RPM range, you are gaining much more than headers that give you 30rwtq at peak but only 2rwtq across most of the RPM range. For those who love math, AREA under the torque curve is what counts and not the peak number.

This is a lot of the reason why a long tube header will pretty much always outperform a mid to short length header. The long primary of long headers allows for a proper scaveging effect to take place, thus helping the cylinder pull the next charge in. Although this is typically confined to a limited portion of the RPM range, the added 'seperate' volume of each primary allows that cylinder better flow during the entire RPM range.

Todd

 

[FOAMAVEN]

Make sure you don't just compare the peak numbers when looking at this. The thing people seem to forget is that you feel the torque when you drive. That gives you the sensation that most associate with a fast vehicle. If headers only give you 2rwtq at peak, but they give 30rwtq or more across some portion of the RPM range, you are gaining much more than headers that give you 30rwtq at peak but only 2rwtq across most of the RPM range. For those who love math, AREA under the torque curve is what counts and not the peak number.

This is a lot of the reason why a long tube header will pretty much always outperform a mid to short length header. The long primary of long headers allows for a proper scaveging effect to take place, thus helping the cylinder pull the next charge in. Although this is typically confined to a limited portion of the RPM range, the added 'seperate' volume of each primary allows that cylinder better flow during the entire RPM range.

Todd

Thanks for your response, you have a good point and I agree with you totally. I have not been able to see the total graph just the max HP and torque gains which were very low. I understand they were designed for low to mid range torque gains which would not show up in the posting of max gains. I can only hope that's the case. Hopefully someone will post the total graph.
:wave:

 

[FOAMAVEN]

White Diamond...You were absolutely correct! They just posted the Gibson dyno curve and all of the gains were in the low and mid range, tapering down to about even on top end. About 20 HP and 21 ft.lbs. of torque on the low end, 15 HP and 15 ft.lbs. of torque in mid range. :beerchug:

 

[WhiteDiamond]

White Diamond...You were absolutely correct! They just posted the Gibson dyno curve and all of the gains were in the low and mid range, tapering down to about even on top end. About 20 HP and 21 ft.lbs. of torque on the low end, 15 HP and 15 ft.lbs. of torque in mid range. :beerchug:

That is power you will feel and be able to use on the street all the time. If you purchased some headers that only gave you that gain near redline, well, you can tell me how often you are there and that is how often you would benefit. For a shorty header, those gains are impressive and the fact it bolts right up to the factory cats is even better for California residents.

Todd