Lt's + pullies installed

[JOHNS01GT]

Just recently had my car dynoe'd before and after. No scanner so no pics, sorry.

Previous hp mods: Magnaflow cat-X & cat-back, tune, 75mm tb & plenum, K&N
Before dyno run #'s= 251 rwhp, 291 rwtq.
Last year's dyno run= 252 rwhp, 296 rwtq

New mods: Slp Lt's & Slp cat-x, SLP pullies, aluminum D/S.
New #'s= 268 rwhp, 305 rwtq

No new tune was done because the A/F was close to the original run, near 13.0.
Not sure what the pullies or D/S did but the guy said not much. Maybe 3-4 hp over 4900 rpm combined he said. It was a Dyno Jet dyno. The Entire curve was 15-20 rwhp more than before, and tourqe was between 10-15. Not same day dyno but one was done a couple days before. Temps were close to the same, around 80 and low humidity. The sound is much deeper now above 2500 rpms. #'s are SAE.

 

[Gearbanger 101]

Snazzy. It's tough to beat the advantage of a set of LT headers over stock manifolds.

 

[helty]

SLP LT's..... . do your cats hang a little low? mine do, and i just noticed that i smoked the drivers side cat. big ole dent in it, but no crack or puncture in the metal. all sound good and no exhaust leak. thank god cuz they're $100 a pop, and i dont know if you can but them individually. hopefully those long tubes hold the cats up higher than mine.

did you do the install, or have a shop do it? did you/they have to drop the k-member, raise the engine, or anything else? just curious. enjoy them, slp makes great quality stuff, and the dyno #'s show it

 

[Gearbanger 101]

That's one more reason I like my Kooks "Mid-length" headers. Better ground clearance.

 

[helty]

That's one more reason I like my Kooks "Mid-length" headers. Better ground clearance.

kook's makes mid-lengths? for 2V's where'd you find them?

 

[Gearbanger 101]

Kooks makes anything you want them to http://www.kookscustomheaders.com/ . That's why they're called "Kooks Custom Headers!"

Here are mine....

....BTW, my car is an MN12 Cougar, not an SN95 Mustang.

 

[helty]

yeah, i was searching and saw they make them for the cougars and t-birds. nice,

 

[csledd]

for the slp creamic lt's


how much rwhp do you think those 4.10 gears are stealing on your dyno?

 

[hotmustang331]

WOW, Nice! I just got my BBK Lts in...this is EXACTLY what i was wanting to see, because I just happened to order the LTs and some March UD pullys on monday(should get the UDs tomorrow).
Thanks alot for this thread, now I can see about how much power I will gain. So i should be setting at ALMOST 300.

These before/after threads are VERY rare and measuring gains JUST from LTs and pullys are non existent since you already had a catted midpipe before.