Anyone ever go from Shorties to LT and notice a diff?

Aliate X · Mar 30, 2007

Yeah well I got the itch after going to the track last night and running a 13.0@106 with a 1.8 60 ft.

Its not bad for a stock TB, ignition, MAF, and injector car, I think I can do 12's just need some more practice. I was gonna save for a turbo kit but I think its better that I get my all motor setup sorted out before I go ahead and bolt a power adder on. So yeah Im gonna go through and do all the bolt ons since I have none as far as motor goes besides the hci lol.

Anyways has anyone ever noticed a diff going to LTs from shorties? Im thinkin about switching over and Im just curious if anyone has actually seen some real gains, otherwise Im not going to bother.

poneypower89 · Mar 30, 2007

suscribing...

had an 89gt vert show up in my JY the other day... had brand new long tubes on it.

I've got BBK Equal Length Shorites now... debating the switch-a-roo

88GTStreetRod · Mar 30, 2007

I have had Long Tubes and Shorty headers on the same car. Currently run Shorty headers. I have a race prep 331 stroker motor that turns 7 grand all day long and that's where the difference was in my car. With the shorty headers, I picked up bottom end and in the 2-3k RPM range. The car falls on it's face at the 5.5-6.5K rpm range. For the driving I do, I rather have the low end power. The long tubes deffinatley sounded good and makes a difference in the exhaust note. I think you would not see much difference on a basic motor with basic bolt ons with the long tubes.

Dean85GT · Mar 30, 2007

You only went 13.0!!! Im almost running that on stock heads but with alot of boltons, my combo is like the exact oppostite of yours lol. Your mph is good though. I wouldnt bother with the LTs. Start upgrading some of the other stock pieces under the hood.

Aliate X · Mar 30, 2007

Dean85GT said:
You only went 13.0!!! Im almost running that on stock heads but with alot of boltons, my combo is like the exact oppostite of yours lol. Your mph is good though. I wouldnt bother with the LTs. Start upgrading some of the other stock pieces under the hood.

yeah its running really rich right now too, still working out some bugs.

25thmustang · Mar 30, 2007

You know my stand, but remember how big of a PITA Long Tubes are. In my eyes if you want to squeeze everything out of it, get them. There are lots of fast shorty cars, but a long tube will help some!

Hmm a 13.4 is not almost 13.0s in my eyes, its almost half a second slower, just quick math (not only that but a missed gear and Aliate would still run quicker than 13.4 (heheh ))! I was telling Aliate I went 13.0s on a bolt on car also, but nowhere near 106 mph, and he also has a lot of supporting mods left, and a tune! All that done hello mid 12s,

Fuzion · Mar 30, 2007

How does the Track heat h/c/i kit run with stock maf and 19lbrs? I might be on the same boat as you while i save money for a pro-m, 24's, and tb. and btw have u passed emission with that set-up?

85ragtop · Mar 30, 2007

I had a guy make me a set of long tubes. They definitely helped up top. I am moving this to tech, some good stuff in here.

Aliate X · Mar 30, 2007

Fuzion said:
How does the Track heat h/c/i kit run with stock maf and 19lbrs? I might be on the same boat as you while i save money for a pro-m, 24's, and tb. and btw have u passed emission with that set-up?

well its running rich really heh. Thats with a 255lph pump and AFPR, I think one of my O2 sensors may be bad though.

N8Miller · Mar 30, 2007

I switched from 1 5/8 shortie headers to 1 3/4 BBK long tubes. i feel that i gained more TQ and top end with the long tubes. perhaps the shorties were too small primary wise for my setup too though!

86bluecobra · Mar 30, 2007

when I comes right down to it on mildly modded stangs the LT don't give you any more then the shorty's will.

25thmustang · Mar 30, 2007

Mine saw a big difference, but I have been told it isnt normal. I look at this, they ban LTs from some of the slower race classes for a reason!

N8Miller · Mar 30, 2007

86bluecobra said:
when I comes right down to it on mildly modded stangs the LT don't give you any more then the shorty's will.

in terms of HP or TQ? there have been dyno studies done where the longtubes will only make 2-3more HP, but make like 30ft/tq or better throughout the RPM range.

86bluecobra · Mar 30, 2007

25thmustang said:
Mine saw a big difference, but I have been told it isnt normal. I look at this, they ban LTs from some of the slower race classes for a reason!

what is a big difference? a tenth?

ill advised · Mar 30, 2007

I went from FMS shorties to BBK 1 5/8 LTs. I didn't notice a difference...other than a hotter cabin.

Dean85GT · Mar 30, 2007

25thmustang said:
You know my stand, but remember how big of a PITA Long Tubes are. In my eyes if you want to squeeze everything out of it, get them. There are lots of fast shorty cars, but a long tube will help some!

Hmm a 13.4 is not almost 13.0s in my eyes, its almost half a second slower, just quick math (not only that but a missed gear and Aliate would still run quicker than 13.4 (heheh ))! I was telling Aliate I went 13.0s on a bolt on car also, but nowhere near 106 mph, and he also has a lot of supporting mods left, and a tune! All that done hello mid 12s,

Sorry I never clarified. Thats a pretty old number, I have changed and added lots since then, except heads

Fett · Mar 30, 2007

Running rich on a stock MAFS and 19lbs with that upper kit? I wouldn't have expected that. How do you know you are running rich, just by the smell or did you dyno it with a WBo2? Just curious.

Also, are you running out of gear as you go through the traps? You have 4.1 gears, and with a 1.8 60ft, I assume you are running slicks. How tall are they?

25thmustang · Mar 30, 2007

86bluecobra said:
what is a big difference? a tenth?

went from a 13.8 @ 98 with Mac Shorties and a catted Mac Hpipe

to

a 13.2 @ 101 with Mac LTs, a prochamber and some pulleys.

Same tires, same weight, same track, very very similar conditions and I had nearly zero driving time between the mods to actually get better! Like I said not normal but it DID happen to me!

Dave2000GT · Mar 30, 2007

Dean85GT said:
You only went 13.0!!! Im almost running that on stock heads but with alot of boltons, my combo is like the exact oppostite of yours lol. Your mph is good though. I wouldnt bother with the LTs. Start upgrading some of the other stock pieces under the hood.

I wouldn't consider a 13.4 to be "almost" a 13.0

5spd GT · Mar 30, 2007

I had old rusty Mac 1 5/8 shorties with one part of the H-pipe smashed nearly 50%.

I then added new BBK longtubes, matching H pipe (not dented), brand new 306 bottomend, performer intake port matched to AFR 165's. Same timing, fuel pressure.

I gained a total of 1.3mph.

I do not attribute the majority of those gains to the longtubes.

They do sound better though.

Anyone ever go from Shorties to LT and notice a diff?

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