[Taskmaster]

Originally Posted by mmmnot

I have AFE - it triggered CEL. Needed AA to code it out.

I have personal beef with AA and their support - I would rather run OEM cats than AA if AFE was not in question.

Run BPC like me.

[mike@x-ph.com]

Originally Posted by TheAxiom

BEFORE AND AFTER DYNO!

+1

[tdavis42]

Found a place that is having a streets night and $70 get three runs. I will go embarrass myself for the greater good.

[mmmnot]

Originally Posted by TheAxiom

Run BPC like me.

Meh. BMW is the side bitch. Focused on the Buick now

[tdavis42]

Originally Posted by mmmnot

Meh. BMW is the side bitch. Focused on the Buick now

Are you going single or twin turbo?

[tdavis42]

I do need to give a shout out to Mike at Extreme Power House..... thanks for the good deal on AA headers and quick shipping.

[Mike.]

Originally Posted by mmmnot

Meh. BMW is the side bitch. Focused on the Buick now

Holy shit I think I just saw a ghost

[mmmnot]

Originally Posted by Mike.

Holy shit I think I just saw a ghost

Hahaha. My bad man. I've been on the turbo Buick forums. The NA has been slack too

I followed your thread. Haven't seen recent updates though. Between work and a 30 year old project time is limited. Jesus. Don't let me get into the alcoholic ex.

[STR8-6IX]

Originally Posted by boro92

Yes, I have no idea myself
I cheaped out and just did cat deletes on the stock manifolds (going in for this - next week). Didn't want to mess with that.

honestly, you would get far better performance gains from russian ebay headers then the stock headers with primary cats deleted.. theyre worse then the ebay stuff.

[boro92]

Originally Posted by 6IX-F10-N52

honestly, you would get far better performance gains from russian ebay headers then the stock headers with primary cats deleted.. theyre worse then the ebay stuff.

I initially had thought the same thing.
There is a thread on here where someone did this, and they gained 15whp and 18tq or some such. That's not bad for a very inexpensive mod. Certainly, a real header is going to get better gains--especially at the top end. But my car is rev limited anyway (it's an auto). I'll post findings on how the results are from my end and hop on a dyno if i can.

[STR8-6IX]

Originally Posted by boro92

I initially had thought the same thing.
There is a thread on here where someone did this, and they gained 15whp and 18tq or some such. That's not bad for a very inexpensive mod. Certainly, a real header is going to get better gains--especially at the top end. But my car is rev limited anyway (it's an auto). I'll post findings on how the results are from my end and hop on a dyno if i can.

those figures with stock manifold? i honestly find that hard to believe lol. someone who builds and ships out maple ridge headers (essentially stock headers with no cats) claims no more then 10 hp and 10ft/lb of torque increase.

[boro92]

Originally Posted by 6IX-F10-N52

those figures with stock manifold? i honestly find that hard to believe lol. someone who builds and ships out maple ridge headers (essentially stock headers with no cats) claims no more then 10 hp and 10ft/lb of torque increase.

I stand corrected. 12whp and 20tq. The guy's original notes below:

Dynocom - bolted into wheel hubs
Stock Run on Chevron 94 - No ethanol
Header run - 92 grade containing ethanol from no name gas station
There was a ping in the run that didn't affect HP but threw max tq off
Despite the ping max tq was around 174 ft lbs. So around 20lbs gain
One of the runs showed 12 whp max gain - not super important because its the delta that matters
Greatest TQ gains are in the 2.5 to 3.5 rpm range
Video briefly shows flatter curves without ping
Best pulls were 5th and 4th base and headers respectively
Avg tq gains throughout the band were 14lbs
Avg hp gains were about 9.X
I highlighted the graph in pen because lines were faint
6 pulls each time - best runs were taken, although the pull before the one on the graph had higher MAX HP and no ping if I remember correctly. I should of had him put that one on. I was in a daze when this went down because we had a baby the night before and I barely had any sleep. Yes. I dyno'd the day after having a child. Don't judge me.



EDIT: one thing i failed to mention - i am doing the cat delete more for reducing engine temps than the actual power gains. the car is cutting timing at the track and power drops dramatically.
Anything i can do to pull heat away from the motor is going to be helpful here to prolong optimal power delivery. This, along with upgrades to the rad, and introduction of oilcooler etc is being done. The 12 ponies or whatever is a bonus

[STR8-6IX]

Originally Posted by boro92

I stand corrected. 12whp and 20tq. The guy's original notes below:

Dynocom - bolted into wheel hubs
Stock Run on Chevron 94 - No ethanol
Header run - 92 grade containing ethanol from no name gas station
There was a ping in the run that didn't affect HP but threw max tq off
Despite the ping max tq was around 174 ft lbs. So around 20lbs gain
One of the runs showed 12 whp max gain - not super important because its the delta that matters
Greatest TQ gains are in the 2.5 to 3.5 rpm range
Video briefly shows flatter curves without ping
Best pulls were 5th and 4th base and headers respectively
Avg tq gains throughout the band were 14lbs
Avg hp gains were about 9.X
I highlighted the graph in pen because lines were faint
6 pulls each time - best runs were taken, although the pull before the one on the graph had higher MAX HP and no ping if I remember correctly. I should of had him put that one on. I was in a daze when this went down because we had a baby the night before and I barely had any sleep. Yes. I dyno'd the day after having a child. Don't judge me.

"I was in a daze when this went down because we had a baby the night before and I barely had any sleep. Yes. I dyno'd the day after having a child. Don't judge me."
bro..

anyway, so this is with stock headers no cats right? doesn't look bad. as for that "ping" you mentioned? do you have any idea what may cause this? would you feel it during daily driving?

[boro92]

^no idea bud, that was from a thread where a guy went to do cat deletes on the stock manifolds. Everything that i put up there (minus my notes on engine heat) were taken from the original poster. Haha.

[Taskmaster]

Mapleridge I think. It was a 323 or 325i

[Eagle1oh7]

Originally Posted by tdavis42

I do need to give a shout out to Mike at Extreme Power House..... thanks for the good deal on AA headers and quick shipping.

+1

Unfortunately I'll be out of the area when they arrive so I can't hide them from my wife. She seems mildly upset that I spent $1000 on my iPhone 7+...

[boro92]

Originally Posted by TheAxiom

Mapleridge I think. It was a 323 or 325i

Ah yes, you are right.
Original thread here: http://www.e90post.com/forums/showthread.php?t=772142

has videos, dyno etc etc on cat delete on stock manifolds.

[mmmnot]

Originally Posted by tdavis42

Are you going single or twin turbo?

Sorry. Didn't see this. It's an 87 grand national. One previous owner with 52k miles. It's staying oem af. I've already gained 8k value after 2k investing. It's such a beautiful car. It's like the ultimate woman.

[mmmnot]

Originally Posted by TheAxiom

Mapleridge I think. It was a 323 or 325i

I'm too lazy now but do you have my dyno saved? It was right after header install. I want to say it was 20~whp tq gain

[Taskmaster]

Originally Posted by mmmnot

I'm too lazy now but do you have my dyno saved? It was right after header install. I want to say it was 20~whp tq gain

I wish I did, the original link to the images are gone (I should have backed them up personally) I just have the peak numbers.

[tdavis42]

Originally Posted by Eagle1oh7

+1

Unfortunately I'll be out of the area when they arrive so I can't hide them from my wife. She seems mildly upset that I spent $1000 on my iPhone 7+...

Haha I have them being held at a FedEx shop for pick up. She won't even see them in the trunk! I can't reroute the BPC package I have coming though but one package is better than two.

[Mike.]

Originally Posted by mmmnot

I'm too lazy now but do you have my dyno saved? It was right after header install. I want to say it was 20~whp tq gain

alcoholic ex? sounds sick