Got tuned this weekend. What you think? (UPDATE on retune pg3) - Page 4

rek888v2 · 05-15-2007, 04:21 PM

Then you must have a shamrock in your pants. He still wouldnt touch my car. 12. anything is way too unsafe for Subie blocks.

06naSTI · 05-17-2007, 03:43 AM

Quote:

Originally Posted by rek888v2

They will be a bit off. It would be smart to weld an extra bung before the cat for a true reading or let it be a mystery and when the block craps out just get a new one. I wish I had money like that!

I believe that the helix catted dp has a bung before the cat. I am not 100% sure. Are you saying that it is more accurate to read arf from before the cat?

rek888v2 · 05-17-2007, 08:11 AM

In my experiances, you get a more stable and truer readings the closer to the turbo you get. When you use an exhaust clip the readings are diluated a bit. (again all my opinion)

005sti · 05-17-2007, 09:23 AM

Quote:

Originally Posted by 06naSTI

I believe that the helix catted dp has a bung before the cat. I am not 100% sure. Are you saying that it is more accurate to read arf from before the cat?

mine does

BoostCrzy · 05-18-2007, 07:09 AM

new dyno sheet on the way

The Owner brought his car back for a follow-up and re-dyno for a good sheet....

-Jack

RiftsWRX · 05-18-2007, 07:49 AM

Tuning... 3 parts art, 1 part science.

DREWSTI04 · 05-18-2007, 08:01 AM

Quote:

Originally Posted by 06naSTI

I guess I should have educated myself a bit more about tuning and afrs before I got a tune. I know that the boost is dropping off hard but is this the norm for a catted dp? I did not think that that would happen. Could the restriction be comming from my spt cat back??

the spt can cause restrictions in power as it does taper to 2.7". i have experienced this but i love the sound so i stick with it!!!

rek888v2 · 05-18-2007, 11:48 AM

Quote:

Originally Posted by RiftsWRX

Tuning... 3 parts art, 1 part science.

... 4 parts dumb luck!

RiftsWRX · 05-18-2007, 01:31 PM

Quote:

Originally Posted by rek888v2

... 4 parts dumb luck!

You could look at it that way then. But start applying even elementary concepts of thermodynamics, pumping losses, and optimized volumetric efficiency, and you quickly realize one very simple truth. Timing is not a knob for power.

But, as per what I said above, the moral is that tuning is subjective; an art per se, subject to the rules of interpretation, with a spattering of science thrown in.

In short. There are dozens of different ways you can tune something to reach the same exact power point. In the end, your comfort level dictates to you certain understandings that you feel shouldn't be crossed to reach that goal. My interpretations are different. Does it make either of us right? IMO, no. At least I'm open minded enough to accept the possability that there is another way of doing it. Even if I don't necessarily agree.

Cheers!

rek888v2 · 05-18-2007, 03:51 PM

Brother, I apoligize. You are correct. I dont agree fully with your methods but you make a valid point. Ive always seen tuning experiance and luck based. Ive tuned a good amount of subies and evo's to include 3 of my own. One took gobs of timing and lean AFR's like a champ, one blew itsself into oblivion. I looked at it as luck. Luck that the motor I had wasnt imploding and luck that I wasnt a trained tuner back then, but chomping away at the bit to get there and actually making headway and power I could brag about! I guess, as I stated above, its all my experiances and dumb luck that a crazy idea might work. You have proven just what Im stating by running the AFR's like you do. So my hats off to ya!

P.S. I like to ramble so forgive me!

modaddict · 05-18-2007, 10:39 PM

interesting speculation.....What do you think I-speed tunes their AFR to?

I bet they are along the lines of Jorge. Lean is mean....Lean is Power.

rek888v2 · 05-19-2007, 04:42 AM

But lean can also mean quicker death to the motor, I proved that with my 2nd STi. And I dont slob poles of any tuners or shops, I form my own opinion based off of things Ive seen and did, speckled with the luck that I dont make the same mistake again!

06naSTI · 05-19-2007, 12:08 PM

Hey all, thanks for all the feedback with my tune. I saw Jack on Thursday and he was hellbent on making me happy. We did a run with the original tune and the afrs did not look as it did before. It definitely did not creep to 13s in the high RPM range. Keep in mind that the afrs on the graph is approximately 0.3 higher since being read from the tail pipe.(Jack, feel free to correct/add any info)
What do you all think this time around?

Thanks again.

06naSTI · 05-20-2007, 04:46 PM

anyone

***520*** · 05-20-2007, 05:08 PM

Im assuming 93 octane.

Those AFR's look much better

05-15-2007, 04:21 PM	#46
rek888v2 STI Driver Car: Haji is my neighbor! Fav Mod: Getting rid of the 05 money pit! Location: Flat4 NC Posts: 267 Join Date: Jan 2006 Trader Rating: (2)	Re: Got tuned this weekend. What you think? Then you must have a shamrock in your pants. He still wouldnt touch my car. 12. anything is way too unsafe for Subie blocks. This ad is not endorsed by this member. Please register or login to hide this ad.

05-17-2007, 08:11 AM	#48
rek888v2 STI Driver Car: Haji is my neighbor! Fav Mod: Getting rid of the 05 money pit! Location: Flat4 NC Posts: 267 Join Date: Jan 2006 Trader Rating: (2)	Re: Got tuned this weekend. What you think? In my experiances, you get a more stable and truer readings the closer to the turbo you get. When you use an exhaust clip the readings are diluated a bit. (again all my opinion)

05-18-2007, 07:09 AM	#50
BoostCrzy Lurker Posts: 7 Join Date: May 2007 Trader Rating: (0)	Re: Got tuned this weekend. What you think? new dyno sheet on the way The Owner brought his car back for a follow-up and re-dyno for a good sheet.... -Jack

05-18-2007, 07:49 AM	#51
RiftsWRX STI Driver Car: '02 WRX/'07 FIT Location: Glendale Heights, IL Posts: 268 Join Date: Mar 2004 Trader Rating: (0)	Re: Got tuned this weekend. What you think? Tuning... 3 parts art, 1 part science.

05-18-2007, 03:51 PM	#55
rek888v2 STI Driver Car: Haji is my neighbor! Fav Mod: Getting rid of the 05 money pit! Location: Flat4 NC Posts: 267 Join Date: Jan 2006 Trader Rating: (2)	Re: Got tuned this weekend. What you think? Brother, I apoligize. You are correct. I dont agree fully with your methods but you make a valid point. Ive always seen tuning experiance and luck based. Ive tuned a good amount of subies and evo's to include 3 of my own. One took gobs of timing and lean AFR's like a champ, one blew itsself into oblivion. I looked at it as luck. Luck that the motor I had wasnt imploding and luck that I wasnt a trained tuner back then, but chomping away at the bit to get there and actually making headway and power I could brag about! I guess, as I stated above, its all my experiances and dumb luck that a crazy idea might work. You have proven just what Im stating by running the AFR's like you do. So my hats off to ya! P.S. I like to ramble so forgive me!

05-18-2007, 10:39 PM	#56
modaddict Spec C Club Car: 04 Crawford STi Fav Mod: CP35r 440whp Posts: 1,948 Join Date: Jun 2006 Trader Rating: (3)	Re: Got tuned this weekend. What you think? interesting speculation.....What do you think I-speed tunes their AFR to? I bet they are along the lines of Jorge. Lean is mean....Lean is Power.

05-19-2007, 04:42 AM	#57
rek888v2 STI Driver Car: Haji is my neighbor! Fav Mod: Getting rid of the 05 money pit! Location: Flat4 NC Posts: 267 Join Date: Jan 2006 Trader Rating: (2)	Re: Got tuned this weekend. What you think? But lean can also mean quicker death to the motor, I proved that with my 2nd STi. And I dont slob poles of any tuners or shops, I form my own opinion based off of things Ive seen and did, speckled with the luck that I dont make the same mistake again! Last edited by rek888v2 : 05-19-2007 at 03:07 PM.

05-19-2007, 12:08 PM	#58
06naSTI Grassroots STI Racer Car: 06 STI Location: FL Posts: 535 Join Date: May 2006 Trader Rating: (0)	UPDATE: Got tuned this weekend. What you think? Hey all, thanks for all the feedback with my tune. I saw Jack on Thursday and he was hellbent on making me happy. We did a run with the original tune and the afrs did not look as it did before. It definitely did not creep to 13s in the high RPM range. Keep in mind that the afrs on the graph is approximately 0.3 higher since being read from the tail pipe.(Jack, feel free to correct/add any info) What do you all think this time around? Thanks again.

05-20-2007, 04:46 PM	#59
06naSTI Grassroots STI Racer Car: 06 STI Location: FL Posts: 535 Join Date: May 2006 Trader Rating: (0)	Re: Got tuned this weekend. What you think? (UPDATE on retune pg3) anyone

05-20-2007, 05:08 PM	#60
*520* STi > EVO... Wait what??? Car: 03 EVO Fav Mod: stock :( Location: Michigan / Saint Louis Posts: 12,397 Join Date: Oct 2005 Trader Rating: (1)	Re: Got tuned this weekend. What you think? (UPDATE on retune pg3) Im assuming 93 octane. Those AFR's look much better This ad is not endorsed by this member. Please register or login to hide this ad.