22HP from customer tune, axleback, and midpipe

[kenaimone]

well i got my car up to the pro dyno yesterday. the current mods are steeda udps, c&l intake, brenspeed 93 octane tune, 4.10's, and a pypes violater axle back. the car made a best of 300 to the wheels. not that bad but it gets better. i have a great relationship the a shop in sumter south carolina called Macon Moore Performance. it turns out that the owner dave moore has been working hand in hand with an exhaust guy in california. well the prototype came in yesterday. so we put it on. it is a 3" mid pype and mufflers that have a four inch tip. well the sound is amazing not to mention what it made on the first pull we saw 312hp and 329tq. i was happy with that. well the second time it made 314hp and 330tq . everybody was happy except rob and dan at pro dyno. the air fuel was at 13.5 so he wanted to change it alittle. so i told him if he could beat brenspeed i will buy lunch. so i go to get the food and come back in shock. 322hp and 336tq. that is insane. pro-dyno is the best dyno shop in the south, rob and dan are great. i had a great time and now my car runs like a raped ape. as far as the exhaust the price is being worked out but i can tell you that you will get a stainless 3" mid pipe and a beautiful welded muffler a lot less than a bassini or magna flow. not to mention the fit. it was hung perfect in about 30 min. the tips fit perfect. i could not be happier. the exhaust has no real drone but you get a great sound under a hard exceleration. when i get back from korea the girl is going to get the kooks and high flow cats. we are really excited about what that might sound like. badassfast.com is the shop's website and pro-dyno.com is the dyno. i should be getting the dyno sheets and the pics by the end of the weekend. i am happy. i have to thank dave, matt, and todd at macon moore performance. also rob and dan at pro dyno, aka the best sct tuner in the country. they were all very generous.
ken

 

[anticubicle]

Those are some nice #'s.

So let me get this straight, you gained 22 RWHP by switching out the mid-pipe AND axle-back combo? What brand is this?

 

[kkdoughboy]

Sounds like the 98 octane really helped.

 

[Leftoverchinese]

22 whp from an axel back huh? I call

 

[kenaimone]

well everybody has an opinion and frankly yours sucks. i am telling that i got 22 with the cat back and a custom pro dyno tune. i will have the dyno graph soon but that might not be enough.

there is really no name for the exhaust. we are working on one now. i like the name KCB by Macon Moore Performance. ken's cat back.

 

[RhinoGT]

Don't take Leftover's reaction personal. Everyone on these forums are sceptical of such claims. You have to understand that in the 3 years since the s197 has come out, no axle back, catback, or mid pipe combo has caused that much HP gain. In fact, it has been the consensous on all the forums that axle backs are for sound only, the best gain you may get is a few HP. The mid pipes typically gain between 5-15 HP over stock. Brenspeed is pretty hard to beat on their tunes and if all that gain was in the tune I'd be worried for the safety of your motor. Once again, It's not personal, we have just seen it time and time again.

 

[kenaimone]

well than i am spot on. the axle back and mid pipe together made 17 hp on the brenspeed tune. the key might be that it is a 3" pipe vs the typical 2.5 now to tell you the truth the brenspeed tune leaned out. the tune on my car now makes more power and is safer. i dont want to bash brenspeed, they have been great to me, but unless you actually put the car on the dyno it is hard to get the tune perfect. safety with pro-dyno have never been in question.

oh and i had a feeling that some people would try to call bs but i left him the numbers for both shops and i challenge him to call. but i doubt that he will. another internet genius

 

[ski]

Assuming all runs before and after the new exhaust install were SAE adjusted, then kudos on the numbers.
But are you saying that the Brenspeed tune also ran lean prior to the install? Because I can see it running lean(13.5) after the install due to the larger diameter on the exhaust.

 

[kooldawg6]

Did you get the 300 HP dyno result just before installation of the axle backs and then redynoed and tuned it on the same day? If not, there is no real accurate way to say how much they actually gained you. No doubt it did give a nice bump in power.

 

[kenaimone]

no, the dyno compro was not done on the same day. the conditions on the good pull was better but you are right it is a great bump. to tell you the truth, to drive the car after the tune is night and day. no matter what, the car makes a ton more power and sounds great.

 

[JTGrant]

well than i am spot on. the axle back and mid pipe together made 17 hp on the brenspeed tune. the key might be that it is a 3" pipe vs the typical 2.5 now to tell you the truth the brenspeed tune leaned out. the tune on my car now makes more power and is safer. i dont want to bash brenspeed, they have been great to me, but unless you actually put the car on the dyno it is hard to get the tune perfect. safety with pro-dyno have never been in question.

oh and i had a feeling that some people would try to call bs but i left him the numbers for both shops and i challenge him to call. but i doubt that he will. another internet genius

To say that the brenspeed tune leaned out, I find that hard to beleive. I know that every car is different, but the tunes I received from Brenspeed and Bamachips were both on the rich side. I run a wideband and it is calibrated correctly (Lm1). A lot of times the dyno's calibration is off on their wideband. I had to lean out the tunes, I also had bamachips and brenspeed revise their tunes. Also I would think that without forced induction you would loose Hp and torque with a 3in system at lower to midrange RPM, given the displacement of our engines. 17HP from a mid-pipe on the Brenspeed tune is a huge gain, if this is true then the has to be the best exhaust design ever for the s197. I'll take one.

 

[DarkFireGT]

To say that the brenspeed tune leaned out, I find that hard to beleive. I know that every car is different, but the tunes I received from Brenspeed and Bamachips were both on the rich side. I run a wideband and it is calibrated correctly (Lm1). A lot of times the dyno's calibration is off on their wideband. I had to lean out the tunes, I also had bamachips and brenspeed revise their tunes. Also I would think that without forced induction you would loose Hp and torque with a 3in system at lower to midrange RPM, given the displacement of our engines. 17HP from a mid-pipe on the Brenspeed tune is a huge gain, if this is true then the has to be the best exhaust design ever for the s197. I'll take one.

I've had tunes from Brent and Doug both on both of our cars. On my '05, Doug's tunes were lean. On my '07, Doug's tunes were rich. In fact, at one point it dropped down to 9:1 and they stopped the dyno. Brent's tunes on both cars are dead on at 13:1, but that doesn't mean you couldn't run lean or rich with his tunes. They just happen to be perfect on our cars. It's VERY possible for one car to go lean with a tuner's tune, and another car to go rich.

 

[blacksheep06]

To say that the brenspeed tune leaned out, I find that hard to beleive. I know that every car is different, but the tunes I received from Brenspeed and Bamachips were both on the rich side. I run a wideband and it is calibrated correctly (Lm1). A lot of times the dyno's calibration is off on their wideband. I had to lean out the tunes, I also had bamachips and brenspeed revise their tunes. Also I would think that without forced induction you would loose Hp and torque with a 3in system at lower to midrange RPM, given the displacement of our engines. 17HP from a mid-pipe on the Brenspeed tune is a huge gain, if this is true then the has to be the best exhaust design ever for the s197. I'll take one.

I agree. I'm not bashing but a 3" pipe would have to cause a drop in performance in the lower RPM's on a near stock 4.6. I'm not saying it wouldn't give a gain in the uppers but you will probably notice a little sluggishness in the lower rpm's.

 

[stangdude2000]

Kenaimone, are you saying the gain is from the axle back, the tune, or the combo of both? Or did you also add in a mid-pipe? I'm not doubting your gains by any means, but your story seems to be reworded each time you post, and I'm quite confused at to what you are claiming. I'm sure we'd all like to know exactly what you were running before and after.

Also, you are new to this board. Coming on and telling people their opinions suck is not a good way to make friends to to make yourself welcome here. Please use more diplomacy in the future when you disagree with someone. *EDIT* I stand corrected. You aren't that new by your join date, but with 25 posts, clearly you don't contribute often. Please show respect to everyone, new member or not.

 

[kooldawg6]

Kenaimone, are you saying the gain is from the axle back, the tune, or the combo of both? Or did you also add in a mid-pipe?

The thread title was "22 hp off axle back" which is totaly misleading. Seems like good gains for the new mods however with 12 baseline then an additional 10 from tuning. I do agree that 3" maybe a bit large for the near stock engine. F/I will definitely love that size.

 

[SpartaPerformance]

I dunno guys!! I'm new to the s-197 but even a jump to a 3" mid pipe and axle back won't generate 22 REAR WHEEL HP!! Not on a stock application especially when there are tons of guys here that got around that much power using long tube headers, catless mid pipes etc....! Just going but what I've read on here. What he should've done is retune his flash tune first, sounds like he just made two regular pulls. I think the HP gain is from a more accurate re-tune on the dyno.

 

[Leftoverchinese]

With the 322hp and 336tq your making with this exhaust combo you will no doubt be running low 12's. My slow little turd is only running 12.8's with a pathetic 293/306 power level. Keep us posted.

 

[kooldawg6]

With the 322hp and 336tq your making with this exhaust combo you will no doubt be running low 12's. My slow little turd is only running 12.8's with a pathetic 293/306 power level. Keep us posted.

Sad thing about the power levels mentioned above is that spyder7724 in his automatic and stock longblock with bolt ons is running 12.0s(I personaly saw him run a 12.15)with only 297 RWHP. That is one guy who's a very good racer and knows the tricks of the trade. These Stangs are 1 helluva fast car if prepped right and have favorable weather conditions.

 

[Leftoverchinese]

Sad thing about the power levels mentioned above is that spyder7724 in his automatic and stock longblock with bolt ons is running 12.0s(I personaly saw him run a 12.15)with only 297 RWHP. That is one guy who's a very good racer and knows the tricks of the trade. These Stangs are 1 helluva fast car if prepped right and have favorable weather conditions.

No doubt that guy is a master at the game. Unlike him though, im still running the stock torque converter and not a 3800 stall TCI unit. Im still a noob when it comes to modding my car and ill be the 1st to admit that, but ive seen many dyno sheets that seem to convey the fact that axel backs alone (like stated in the title of this thread) dont seem to put out the numbers we'd like. Which is why i kept my stock ones in place.

 

[kooldawg6]

leftover, when I ran my car back in the spring, I had the stock mufflers on with the O/R H, 4.10s, CAI and 93 octane tune and ran the 13.345. There is no doubt the stock mufflers perform well, just too quiet. I doubt the Flows would have gained me any time on the track.