Any gain going from shorties to longtubes?

[BelueLX]

My car has Mac shorties, a custom 2.5" H-pipe and flowmaster mufflers. Will I see any gain going with longtubes, a 3" pipe and 3" race bullet style exhaust? I dont want to spend the money if its just going to be louder.

 

[5.0hatch]

I gained 3mph by going from longtubes to shorties. I think mine was a rare case though

 

[5spd GT]

Well with you having a supercharger feeding all that extra air in you need to get it out...so I would say yes

David

 

[ECU5.0]

yea, the long tubes help with cars with power adders like a super charger or a huge shot of nitrous. i was thinkin about gettin long tubes for my car...but was talked out of it because i was told that id lose a lot of low end power....dont know the truth behind that...but oh well.

 

[Silentst2000]

I was under the impression you gain lowend torque with long tubes?

 

[ECU5.0]

me too....but im not sure...since i dont know that much about them

 

[cevtv]

I was under the impression you gain lowend torque with long tubes?

 

[00 Red SS]

I thought w/long tubes you lose a lil low end but get the horsepower in the upper rpm's.

 

[mike keirstead]

I had my car dynoed after longtubes and I didnt lose anything at any rpm. I gained across the board. I switched from shorties to LTs.

 

[cevtv]

I thought w/long tubes you lose a lil low end but get the horsepower in the upper rpm's.

It's a myth - total

 

[mike keirstead]

It's a myth - total

The MYTH is losing power down low. You will see power go up (torque/hp) across the entire RPM range. The average # are higher and the peak is higher also.

 

[cevtv]

The MYTH is losing power down low. You will see power go up (torque/hp) across the entire RPM range. The average # are higher and the peak is higher also.

You are correct - I should have stated that better.

 

[mike keirstead]

You are correct - I should have stated that better.

I was backing you up....no worries man

 

[mike keirstead]

I gained 3mph by going from longtubes to shorties. I think mine was a rare case though

2 mph here. It is not uncommon.

 

[wildstang347]

full length headers have a better scavenging effect allowing the hot gases 2 maintane a higher velocity to the collector in a way actually helping pull spent gases from the combustion chamber, allowing your motor to make more power across entire RPM range like mike k. quoted.
i run the housler series (stepped) headers wich are a little more expensive, but have seen an significant improvement to warrant the extra cost.

 

[GAU89LXStang]

LTs all the way!! But definetely get the ceramic coated ones. And from everything I have seen, heard and read LTs give you more torque down low with a slight HP loss down low. The main reason alot of people don't run them is they can be pricey and a PITA to install. Note that I said CAN BE, not all are. But you get what you pay for.

Wie Spats,
Mo' Town

 

[mike keirstead]

My car has Mac shorties, a custom 2.5" H-pipe and flowmaster mufflers. Will I see any gain going with longtubes, a 3" pipe and 3" race bullet style exhaust? I dont want to spend the money if its just going to be louder.

I would stay with the 2.5 inch exhaust.

 

[25thmustang]

I went from Mac shorties to Mac longtubes, and a Mac cattewd H to a mac prochamber. With pulleys also added the car went from a 13.89 to a 13.05... and from 98 mph to 103 mph. Any loss in power is a total myth as there was no SOTP feel after the pulleys, but after the exhaust the car felt new.

 

[mike keirstead]

I went from Mac shorties to Mac longtubes, and a Mac cattewd H to a mac prochamber. With pulleys also added the car went from a 13.89 to a 13.05... and from 98 mph to 103 mph. Any loss in power is a total myth as there was no SOTP feel after the pulleys, but after the exhaust the car felt new.

That's a huge increase. Did you change anything else on the car. IE traction, suspension, gears......anything. That is a really big increase for just exhaust. Maybe your CATS were plugged or something. I don't doubt it though. I noticed a difference. I just wish it was as big as you.

I saw 2.1 mph and 2/10. I was happy.

The longtube power loss IS NOT TRUE. I saw it over a year ago on a dyno.

AXIStang----get the longtubes. But stay with the 2 1/2 piping.

 

[Silentst2000]

The only way I can see LT's could loose power on the low end but pushing it up would be using headers with too large of pipeing for the rated power level.