Any gain going from shorties to longtubes?

BelueLX · Jan 20, 2004

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 · Jan 20, 2004

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

5spd GT · Jan 20, 2004

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 · Jan 20, 2004

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 · Jan 20, 2004

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

ECU5.0 · Jan 20, 2004

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

cevtv · Jan 20, 2004

Silentst2000 said:
I was under the impression you gain lowend torque with long tubes?

00 Red SS · Jan 20, 2004

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

mike keirstead · Jan 20, 2004

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 · Jan 20, 2004

00 Red SS said:
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 · Jan 20, 2004

cevtv said:
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 · Jan 20, 2004

mike keirstead said:
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 · Jan 20, 2004

cevtv said:
You are correct - I should have stated that better.

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

mike keirstead · Jan 20, 2004

5.0hatch said:
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 · Jan 21, 2004

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 · Jan 21, 2004

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 · Jan 21, 2004

AXIStang said:
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 · Jan 21, 2004

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 · Jan 21, 2004

25thmustang said:
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 · Jan 21, 2004

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.

Any gain going from shorties to longtubes?

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