screen and cutout tune question - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

SeaCompiler · 03-12-2017, 06:53 PM

I will be racing at wannagofast on May 7th. I plan to purchase an intake screen for my turbo and a 3" cutout on the down-pipe to use specifically at the event. My question is - will this affect my tune or put the car at risk of running out of fuel? Logic says no, but I need some real-world advice.

SeaCompiler · 03-14-2017, 08:44 AM

bump - gotta be someone who has done this? I know some of you bums have turbos & cutouts.......

Batmanntexas · 03-14-2017, 10:39 AM

While I don't have turbos, I do have a Whipple with dual 3" cutouts, directly behind the headers. I sometimes get a DTC P0131 when I have them open and just cruising around. I don't ever get any codes when they are open at the track though.

jeff657756 · 03-14-2017, 11:47 AM

Quote:

Originally Posted by SeaCompiler

I will be racing at wannagofast on May 7th. I plan to purchase an intake screen for my turbo and a 3" cutout on the down-pipe to use specifically at the event. My question is - will this affect my tune or put the car at risk of running out of fuel? Logic says no, but I need some real-world advice.

Not an expert but with a turbo car seems like those are two big things that will affect air flow / back pressure. I would take it to the tuner just to be safe.

SeaCompiler · 03-14-2017, 07:14 PM

Thanks for the feedback everyone. I have searched a lot of forum threads, but just have not found anything conclusive. I will call Pat I guess.

caper · 03-15-2017, 01:01 AM

i didnt need one for a cutout on my downpipe

Glushenij · 03-15-2017, 06:17 AM

I got Qtp cutouts on my twin turbo! My tuner tune my car with cutouts close and after he done he run with cutouts open( when it's open his wideband can't read properly) so he monitor with my wideband!- he didn't adjust nothing ( he sad everything looks good)! I run like that for 4-5 months(lil bit open to wide open cutouts) no problem

RealQuick · 03-16-2017, 11:04 AM

Yes, you will see an airflow increase.

On back to back 2nd gear hits (pull started around 2500rpm), I saw a 23% increase in airflow @ 5100rpm when I removed the filter and opened the cutouts on my Huron kit. I let out after 5100rpm because the tires broke.

The MAF reading was 1.17g/s @ 5100rpm with filter and cutouts closed
MAF readings was 1.44g/s @ 5100rpm with screen and cutouts open

SeaCompiler · 03-16-2017, 11:49 AM

Quote:

Originally Posted by caper

i didnt need one for a cutout on my downpipe

Thanks!

Quote:

Originally Posted by Glushenij

I got Qtp cutouts on my twin turbo! My tuner tune my car with cutouts close and after he done he run with cutouts open( when it's open his wideband can't read properly) so he monitor with my wideband!- he didn't adjust nothing ( he sad everything looks good)! I run like that for 4-5 months(lil bit open to wide open cutouts) no problem

Thanks for the feedback!

SeaCompiler · 03-16-2017, 12:00 PM

Quote:

Originally Posted by RealQuick

Yes, you will see an airflow increase.

On back to back 2nd gear hits (pull started around 2500rpm), I saw a 23% increase in airflow @ 5100rpm when I removed the filter and opened the cutouts on my Huron kit. I let out after 5100rpm because the tires broke.

The MAF reading was 1.17g/s @ 5100rpm with filter and cutouts closed
MAF readings was 1.44g/s @ 5100rpm with screen and cutouts open

Now, we are getting scientific - hell yes

. I am at 1.37 g/s at 5700 and fuel pressure at 58.7 psi at 6 psi(2nd) and 1.2g/s at 6800 and fuel pressure at 57.4 psi (3rd).

So, I would assume if I am pumping in more air with screen and cutouts, I need more fuel - right? If the tune is configured for ~1.37g/s and does not adjust when it is able to pump in more, then that is the risk I think? I don't know how to tell if my tune is configured to adjust or not. I have HP Tuners, but I only know how to find values, not understand how they work.

I would like to understand if possible (because its fun), rather than just get confirmation, which is nice too.

RealQuick · 03-16-2017, 02:01 PM

Quote:

Originally Posted by SeaCompiler

Now, we are getting scientific - hell yes

. I am at 1.37 g/s at 5700 and fuel pressure at 58.7 psi at 6 psi(2nd) and 1.2g/s at 6800 and fuel pressure at 57.4 psi (3rd).

So, I would assume if I am pumping in more air with screen and cutouts, I need more fuel - right? If the tune is configured for ~1.37g/s and does not adjust when it is able to pump in more, then that is the risk I think? I don't know how to tell if my tune is configured to adjust or not. I have HP Tuners, but I only know how to find values, not understand how they work.

I would like to understand if possible (because its fun), rather than just get confirmation, which is nice too.

I'll try and dig into my logs tonight and post more specific data.

SeaCompiler · 03-16-2017, 04:14 PM

Thanks RealQuick.

If Glushenij and caper tunes auto adjust like a maf tune, then that would explain why they have no worries (until they run out of fuel). I just don't know how to tell the difference between MAF tunes and speed density? It was tuned by Pat G, so if anyone knows how he generally tunes, that is it. I simply can't be calling him non stop to find this stuff out, so I am starting here first. My afr right now is fine and remains a cool 11.4 through the rpm range - so no worries there.

KTMracing09 · 03-16-2017, 04:16 PM

Id take it to the tuner regardless, it's better to safe, and you'll maximize the potential of the new setup. I'd imagine it's going to spool a lot faster and a lot harder, and fuel will need to be adjusted.

RealQuick · 03-16-2017, 04:53 PM

Quote:

Originally Posted by SeaCompiler

Thanks RealQuick.

If Glushenij and caper tunes auto adjust like a maf tune, then that would explain why they have no worries (until they run out of fuel). I just don't know how to tell the difference between MAF tunes and speed density? It was tuned by Pat G, so if anyone knows how he generally tunes, that is it. I simply can't be calling him non stop to find this stuff out, so I am starting here first. My afr right now is fine and remains a cool 11.4 through the rpm range - so no worries there.

Send me a pm with your cell# and I can shoot you some pics

03-12-2017, 06:53 PM	#1
SeaCompiler ...not a marine biologist Drives: 2012 Camaro RY SS LS3 Join Date: Mar 2013 Location: Clarkesville, GA Posts: 752 View My Garage	screen and cutout tune question I will be racing at wannagofast on May 7th. I plan to purchase an intake screen for my turbo and a 3" cutout on the down-pipe to use specifically at the event. My question is - will this affect my tune or put the car at risk of running out of fuel? Logic says no, but I need some real-world advice. __________________ Forged 416 stroker Turbocharged with Huron Speed with Cam Motion custom grind,Tuned by Vengeance, 8psi, 25% PowerBond UDP, Ported TB, shaved heads, LS9 gaskets, chromoly pushrods, BT trunnions & dual valve springs, IWIS, Might Mouse CC, SJM Line Lock,, MSD 2-Step, ZL1 Rear End, ZL1 spoiler, Strut Brace, ARP bolts, Skip shift elim, A-Pillar Gauges, FR Style 41 20X10, 3 inch exhaust, blackouts, Lowered, Custom badges, Hines vents,RPI fender vents, Technostalgia Tail Lights, Metra Kit, Pioneer stereo, Morimoto RGB Halos, "The Great Awakening" on gab.com

03-14-2017, 08:44 AM	#2
SeaCompiler ...not a marine biologist Drives: 2012 Camaro RY SS LS3 Join Date: Mar 2013 Location: Clarkesville, GA Posts: 752 View My Garage	bump - gotta be someone who has done this? I know some of you bums have turbos & cutouts....... __________________ Forged 416 stroker Turbocharged with Huron Speed with Cam Motion custom grind,Tuned by Vengeance, 8psi, 25% PowerBond UDP, Ported TB, shaved heads, LS9 gaskets, chromoly pushrods, BT trunnions & dual valve springs, IWIS, Might Mouse CC, SJM Line Lock,, MSD 2-Step, ZL1 Rear End, ZL1 spoiler, Strut Brace, ARP bolts, Skip shift elim, A-Pillar Gauges, FR Style 41 20X10, 3 inch exhaust, blackouts, Lowered, Custom badges, Hines vents,RPI fender vents, Technostalgia Tail Lights, Metra Kit, Pioneer stereo, Morimoto RGB Halos, "The Great Awakening" on gab.com

03-14-2017, 10:39 AM	#3
Batmanntexas Drives: 2012 Camaro SS (2SS) Join Date: Aug 2012 Location: Stafford, VA Posts: 1,372 View My Garage	While I don't have turbos, I do have a Whipple with dual 3" cutouts, directly behind the headers. I sometimes get a DTC P0131 when I have them open and just cruising around. I don't ever get any codes when they are open at the track though. __________________ 745RWHP/634RWTQ on 93 @ 10psi 806/676 on E85 @ 10psi COTW 9/8/14

03-14-2017, 07:14 PM	#5
SeaCompiler ...not a marine biologist Drives: 2012 Camaro RY SS LS3 Join Date: Mar 2013 Location: Clarkesville, GA Posts: 752 View My Garage	Thanks for the feedback everyone. I have searched a lot of forum threads, but just have not found anything conclusive. I will call Pat I guess. __________________ Forged 416 stroker Turbocharged with Huron Speed with Cam Motion custom grind,Tuned by Vengeance, 8psi, 25% PowerBond UDP, Ported TB, shaved heads, LS9 gaskets, chromoly pushrods, BT trunnions & dual valve springs, IWIS, Might Mouse CC, SJM Line Lock,, MSD 2-Step, ZL1 Rear End, ZL1 spoiler, Strut Brace, ARP bolts, Skip shift elim, A-Pillar Gauges, FR Style 41 20X10, 3 inch exhaust, blackouts, Lowered, Custom badges, Hines vents,RPI fender vents, Technostalgia Tail Lights, Metra Kit, Pioneer stereo, Morimoto RGB Halos, "The Great Awakening" on gab.com

03-15-2017, 01:01 AM	#6
caper Drives: 2010 IOM 2ss/RS Join Date: Sep 2009 Location: SoCal, I.E. Posts: 1,545	i didnt need one for a cutout on my downpipe __________________ Turbonetics running 8lbs boost at 700rwhp tuned by Hi Rev, installed by K&M w/cat-muffler delete, ACS splitter, Fesler GFX, MPD1 spoiler, Custom painted Rally stripes, Cordon CR1 wheels 275/315s, Hotchkiss comp sways and end links, Barton shifter

03-15-2017, 06:17 AM	#7
Glushenij Drives: 2014 Camaro 2SS 1LE Join Date: Jul 2015 Location: Lima Ohio Posts: 167	I got Qtp cutouts on my twin turbo! My tuner tune my car with cutouts close and after he done he run with cutouts open( when it's open his wideband can't read properly) so he monitor with my wideband!- he didn't adjust nothing ( he sad everything looks good)! I run like that for 4-5 months(lil bit open to wide open cutouts) no problem __________________ AGP TT 807whp 811wtq 13.46psi E85+methanol

03-16-2017, 11:04 AM	#8
RealQuick Drives: 2010 Camaro 2SS M6 - Intake/Exhaust Join Date: Sep 2014 Location: Bridgewater Posts: 693	Yes, you will see an airflow increase. On back to back 2nd gear hits (pull started around 2500rpm), I saw a 23% increase in airflow @ 5100rpm when I removed the filter and opened the cutouts on my Huron kit. I let out after 5100rpm because the tires broke. The MAF reading was 1.17g/s @ 5100rpm with filter and cutouts closed MAF readings was 1.44g/s @ 5100rpm with screen and cutouts open

03-16-2017, 04:14 PM	#12
SeaCompiler ...not a marine biologist Drives: 2012 Camaro RY SS LS3 Join Date: Mar 2013 Location: Clarkesville, GA Posts: 752 View My Garage	Thanks RealQuick. If Glushenij and caper tunes auto adjust like a maf tune, then that would explain why they have no worries (until they run out of fuel). I just don't know how to tell the difference between MAF tunes and speed density? It was tuned by Pat G, so if anyone knows how he generally tunes, that is it. I simply can't be calling him non stop to find this stuff out, so I am starting here first. My afr right now is fine and remains a cool 11.4 through the rpm range - so no worries there. __________________ Forged 416 stroker Turbocharged with Huron Speed with Cam Motion custom grind,Tuned by Vengeance, 8psi, 25% PowerBond UDP, Ported TB, shaved heads, LS9 gaskets, chromoly pushrods, BT trunnions & dual valve springs, IWIS, Might Mouse CC, SJM Line Lock,, MSD 2-Step, ZL1 Rear End, ZL1 spoiler, Strut Brace, ARP bolts, Skip shift elim, A-Pillar Gauges, FR Style 41 20X10, 3 inch exhaust, blackouts, Lowered, Custom badges, Hines vents,RPI fender vents, Technostalgia Tail Lights, Metra Kit, Pioneer stereo, Morimoto RGB Halos, "The Great Awakening" on gab.com

03-16-2017, 04:16 PM	#13
KTMracing09 Drives: 2SS/RS L99 ABM Join Date: Aug 2009 Location: Mechanicsville, Maryland Posts: 227	Id take it to the tuner regardless, it's better to safe, and you'll maximize the potential of the new setup. I'd imagine it's going to spool a lot faster and a lot harder, and fuel will need to be adjusted. __________________ Rotofab CAI, 2" LT Headers/non catted, 3" Straight Pipe w/ X-Pipe, Elite Catch Can, GPI SS3 VVT, 9" 4000 Triple Disc, Yella Terra Ultralite Rocker Arms, MSD Super Conductor wires