M

Just put mine on Friday and was fortunate to have a nice day yesterday in western PA so I took them out and oh my gosh, well you are going to love them. they were easy to install as well, the stock are a bit of pain to take off but once thats done you'll have the slps on in no time

M

Hawgman,

Do you have actual numbers on that torque loss or are you just going by feel??? I not doubting you but I cant imagine losing much of anything by simply replacing the axlebacks, if you removed your midpipes and cats and went with a straigh thru set-up than I can see a torque loss there.

I'd be interested to know if you got some numbers and what they were.

Thanks !!!

hawgman

There was a 2hp and 8ftlb rwtq difference on my car according to the dynojet, SAE corrected between the two axle back setups. Do I have the printouts with me, no I do not. That was not the only thing I did to the vehicle that day and the only one I kept was the final pull.

LesteR723

man, just get the Flowmaster Delta Flows... they're loud enough but not so loud your gonna be a serious target.

M

So let me clarify, there was less HP and TQ but you did other things that say to the car, are the numbers specific to the axleback set ups or do they include your other mods as well ( i see you have an electric pump and pulleys as well...where they on when you had the slps on?)

thanks, just wanna check to see if its worth getting a tune to account for the slps...all the tuners i spoke with said its not gonna make a difference with just axlebacks...even the slps

torch red

mine are on the way.....wwwwooohhoooo

JT_Moore05

does anyone know the numbers for BaseHP and torque gain for putting on SLP Loudmouths?

MikeHawke

there is not necessarily less hp and tq. It just may move up in the RPM range due to the lack of backpressure at low RPM.

Anyway, that's one possibility but it really depends on a whole combination of things. It sounds like hawgman was saying that he lost power overall with those muffs on his setup, but that may not be the case with everyone.

You got headers on that car hawgman?

hawgman

The numbers were specific to the SLPs. I did a couple of things to the car that day, and am fortunate enough to do business with a race shop that will let you tinker with your car and strap it down between mods to check for progress ( or lack of ). The SLPs showed 2HP less and 8ftlb rwtq less than the stock mufflers. I ran them anyway because they just sounded so damn cool. A couple of months later I purchased the FRPPs and put them on and got about the same numbers in the opposite direction over stock ( +HP and +rwtq ) that I got with the SLPs. The UDPs were on the car at the time, the EH2O pump was not.

A tune is not going to be necessary with any axle back system on these cars. If you go with more than axle back, I would recommend at least having it checked to make sure that you don't lean it out.

Bingo. That is exactly what I was saying. Overall, there was a loss of HP and torque from stock with that perticular setup. And that may not be the case with everyone.

Nope, not yet. Still can't make my mind up between Kooks and Stainless Works. One of these days I will get tired of flipping back and forth between the two manufacturer's product pages and just click on a "add to cart" button.

2GKT5

Does anyone have pictures of their car's backside w/ the SLPs on?

Just wondering what they look like