[The Nerd]

Originally Posted by FC4

Nope, it can't.

I read that, with a resonator deletion (like my Borla), horsepower goes up but torque potentially goes down a hair.

Just reporting what I read through some research....

[F30MSport]

Thanks for sharing your results, I've been waiting on the Dinantronics to potentially stack with my "old" MPPK. Smart to dyno before and after, if the numbers don't make sense use the 3 day return policy!

[Mike_L]

Originally Posted by The Nerd

I read that, with a resonator deletion (like my Borla), horsepower goes up but torque potentially goes down a hair.

Just reporting what I read through some research....

Thats on naturally aspirated motors. I believed the same thing, but after some studying, I found that turbo motors like a wide open exhaust. The turbo provides backpressure for the motor, and the less pressure behind it, the easier it is for the turbo to spin and the less the lag.

As against it as I am, and I am REALLY against it, I'm actually looking at possibly going catless to open up the exhaust.

[613Bimmer]

Originally Posted by Mike_L

Thats on naturally aspirated motors. I believed the same thing, but after some studying, I found that turbo motors like a wide open exhaust. The turbo provides backpressure for the motor, and the less pressure behind it, the easier it is for the turbo to spin and the less the lag.

As against it as I am, and I am REALLY against it, I'm actually looking at possibly going catless to open up the exhaust.

Did you just say you want to go CATLESS!!! Wow, I'm looking for flying pigs out of my window but none to report so far.

To the OP : Wow, congrats on such good numbers. I was sort of turned off of Dinan before because of the seemingly conservative numbers that it was putting out but I always wanted the peace of mind of a warranty. Now I can rest because I've found a tune that I may actually want...

Also, would it be worth running a chargepipe and/or a DP with a Dinan tune or would it not be necessary?

[Mike_L]

Originally Posted by F**Enthusiast

Did you just say you want to go CATLESS!!! Wow, I'm looking for flying pigs out of my window but none to report so far.

To the OP : Wow, congrats on such good numbers. I was sort of turned off of Dinan before because of the seemingly conservative numbers that it was putting out but I always wanted the peace of mind of a warranty. Now I can rest because I've found a tune that I may actually want...

Also, would it be worth running a chargepipe and/or a DP with a Dinan tune or would it not be necessary?

Really, don't want to, but it seems like the best way to go. I may do it for a short time until CG Precision releases their new downpipes. Their 100cpi cats should flow really well, yet still be legal.

Chargepipe is a good idea all the time with these motors. Even stock.

[Dosturbos]

Originally Posted by Mike_L

Thats on naturally aspirated motors. I believed the same thing, but after some studying, I found that turbo motors like a wide open exhaust. The turbo provides backpressure for the motor, and the less pressure behind it, the easier it is for the turbo to spin and the less the lag.

As against it as I am, and I am REALLY against it, I'm actually looking at possibly going catless to open up the exhaust.

Why are you so against catless? Its going to add another 20+ WHP to the wheels and at least that in TQ.
If properly installed it shouldn't stink or drone.
I didn't buy a 6 cylinder turbo car because I care about the environment. And have you seen the future generation? Earth is literally going to implode in the next 50 years. You might as well enjoy yourself.

[Buckeyes]

The Earth was pummeled with asteroids for half a billion years, a little CFC's ain't no thing. Plus you got China pumping the crap out like its a contest.

[ronanz]

Originally Posted by Mike_L

Thats on naturally aspirated motors. I believed the same thing, but after some studying, I found that turbo motors like a wide open exhaust. The turbo provides backpressure for the motor, and the less pressure behind it, the easier it is for the turbo to spin and the less the lag.

As against it as I am, and I am REALLY against it, I'm actually looking at possibly going catless to open up the exhaust.

WOW!! Inching towards 180 degrees!


.

[ronanz]

Originally Posted by Trcb777

The Earth was pummeled with asteroids for half a billion years, a little CFC's ain't no thing. Plus you got China pumping the crap out like its a contest.

LOL!!

.

[Mike_L]

Originally Posted by Dosturbos

Why are you so against catless? Its going to add another 20+ WHP to the wheels and at least that in TQ.
If properly installed it shouldn't stink or drone.
I didn't buy a 6 cylinder turbo car because I care about the environment. And have you seen the future generation? Earth is literally going to implode in the next 50 years. You might as well enjoy yourself.

Because cats exist for a reason, and like it or not, they are the law. I need one to pass inspection, and I want to keep my car.

[Dosturbos]

You can't pass inspection with a DP and JB4?
I passed inspection twice with Catless DP's on my N54, but I had a DP fix wired into my harness.
Laws are meant to be broken, especially the lame ones that shit on our freedom and fun times in the tiniest of ways.

[Mike_L]

Originally Posted by Dosturbos

You can't pass inspection with a DP and JB4?
I passed inspection twice with Catless DP's on my N54, but I had a DP fix wired into my harness.
Laws are meant to be broken, especially the lame ones that shit on our freedom and fun times in the tiniest of ways.

Nope. Second they look under the car and see no cat, I fail. NYC has inspection similar to CA. Full safety, OBD-2 and visual. Plus, doesn't the JB4 just turn the code off? The rear O2 still shows as "Not Ready", which is another reason to fail me. Would have better luck with a catalytic spacer.

[Dosturbos]

Not surprised, NY and CA have too many laws...and wouldn't you know it, a lot of prisons and people in them.
NY drug laws are equally ridiculous.
Sorry your state blows goats when it comes to having fun.

[FC4]

Interesting. I've lived in CA my entire life and have modded my cars as I wish with not a single repercussion. Guess I gotta put the cats back on all my modded cars and tell AMS to return my GTR back to stock before they ship it back to me this summer.

Good to know.

[FC4]

Originally Posted by The Nerd

I read that, with a resonator deletion (like my Borla), horsepower goes up but torque potentially goes down a hair.

Just reporting what I read through some research....

The blind have lead the blind for ages causing this misinformation.

It all started back in 1952 when two guys, Cletus and Buford, took a hacksaw to the exhaust manifolds of their 47 Ford. Exhaust pulses were screwed and they noticed reduced torque when they put it on the dyno, but they saw improved 60-130 MPH times with a VBox. The car made more power at the expense of torque due to the Jerry-rigged exhaust setup...but boy oh boy did the noise make for a hootin' n hollerin' time.

Ever since then, people on the internet have thought a reduction in backpressure causes a decrease in torque. There is almost no evidence supporting this even in small NA engines nowadays, and is nowhere near true for turbocharged engines.

[Dosturbos]

I was going to say I lived in CA for 10 years and still visit on occasion. CA has more performance and tuning shops than anywhere in the country. I wish my car lived there. Hard to find a shop that knows how to properly install a DP for a BMW around here. Have AMS send your GTR to Boston, I will take real good care of her. We even have 93 Octane at the pump here.

[FC4]

Originally Posted by Dosturbos

I was going to say I lived in CA for 10 years and still visit on occasion. CA has more performance and tuning shops than anywhere in the country. I wish my car lived there. Hard to find a shop that knows how to properly install a DP for a BMW around here. Have AMS send your GTR to Boston, I will take real good care of her. We even have 93 Octane at the pump here.

Hmmm, thanks...I'll take you up on that. Without access to 93 octane here, the car will be relegated to only run on VP Import when it's back.

[Mike_L]

Originally Posted by FC4

Interesting. I've lived in CA my entire life and have modded my cars as I wish with not a single repercussion. Guess I gotta put the cats back on all my modded cars and tell AMS to return my GTR back to stock before they ship it back to me this summer.

Good to know.

Then good for you, you found a way around CARB.

[FC4]

Originally Posted by Mike_L

Then good for you, you found a way around CARB.

I've never had the need to find a way around CARB because I haven't had a reason to get involved with them in the first place. I have never had to smog a car I own or take it to get inspected.

[Mike_L]

I just looked it up. No safety inspections in CA and emissions is every 2 years on cars older than 6 years old except in certain metropolitan areas. They cut back a lot.

I gotta have safety every year, and OBD2 every year after 2 years old.

[The Nerd]

Originally Posted by F**Enthusiast

Did you just say you want to go CATLESS!!! Wow, I'm looking for flying pigs out of my window but none to report so far.

To the OP : Wow, congrats on such good numbers. I was sort of turned off of Dinan before because of the seemingly conservative numbers that it was putting out but I always wanted the peace of mind of a warranty. Now I can rest because I've found a tune that I may actually want...

Also, would it be worth running a chargepipe and/or a DP with a Dinan tune or would it not be necessary?

These tunes are so temperamental....if the Dinan tune isn't designed to run with a downpipe, I'd be careful. I remember another member had trouble with the Dinan tune early on just because of the amount of air entering the airbox (the MPPK airbox), but has since been remedied. Shows you how sensitive these things are.

The stage 2 Dinan tune is just around the corner, and I'm willing to be the downpipe would be great for that. A charge pipe shouldn't matter either way....no performance gain.

[Dosturbos]

Originally Posted by The Nerd

These tunes are so temperamental....if the Dinan tune isn't designed to run with a downpipe, I'd be careful. I remember another member had trouble with the Dinan tune early on just because of the amount of air entering the airbox (the MPPK airbox), but has since been remedied. Shows you how sensitive these things are.

The stage 2 Dinan tune is just around the corner, and I'm willing to be the downpipe would be great for that. A charge pipe shouldn't matter either way....no performance gain.

Cobb pro tune needs to happen