Will JLT RAI affect my A/F wit my setup? - 2003-04 Mach 1 Registry Owners Club

Mach1Speed03 · 01-21-2008, 11:24 AM

Hey fellow machs,
I had a question regarding the JLT RAI. I was interested in getting 1 and i wanted to know if putting it on will affect the A/F ratio. (will i need a custom dyno tune?) My current mods are bassani catback, bassani off-road X, and a Diablo Predator. Justins Performance Center says no. Any other opinions?

FloridaOrange · 01-21-2008, 11:28 AM

I'd definitely get it checked. The key is the mid pipe with the RAI. Are you running a custom tune through the Diablo or the canned tune. If canned DEFINITELY. Usually, the canned tunes are set up for a stock car, not a modded one.

smbstyle · 01-21-2008, 11:56 AM

If you're worried about being "safe", i'd say the canned tune is fine for your setup, but if you're trying to squeeze every last drop of horsepower out of your setup, I'd go with getting it custom tuned.

Mach 1's come from the factory fairly rich, and a JLT intake might make it a little bit leaner, so I'd say you'd still be safe. The best way is to get an a/f meter on it and see for yourself.

SHAKEN · 01-21-2008, 12:12 PM

Install a wideband and use your Predator to get you a/f right. Most muffler shops can install the o2 bung. If that is beyond your ability go to a CMR dealer and put it on a dyno. Since our mods are similar you should be safe maybe a little rich. My maf is in the factory position.

vpMach1 · 01-21-2008, 01:12 PM

Quote:

Originally Posted by SHAKEN

Install a wideband and use your Predator to get you a/f right. Most muffler shops can install the o2 bung. If that is beyond your ability go to a CMR dealer and put it on a dyno. Since our mods are similar you should be safe maybe a little rich. My maf is in the factory position.

No reason for a wideband at his level of mods.

SHAKEN · 01-21-2008, 01:24 PM

My mods are about the same. I have a wideband and I had to adjust my a/f with my Predator. Before I install my wideband and my o/r xpipe listed in my signature. I installed my Predator performance tune experianced slight detonation with 93 octance. From reading countless posts on the internet I took out timing and added fuel to eliminate detonation. Once I installed my o/r xpipe and wideband my a/f ratio was 11.5. So for me the wideband was helpful in tuning my Mach. Yeah I would like to put it on a dyno to see the numbers and get a graph but with the wideband I KNOW it is right and safe and is giving me the most power without a dyno tune.

vpMach1 · 01-21-2008, 01:38 PM

Quote:

Originally Posted by SHAKEN

My mods are about the same. I have a wideband and I had to adjust my a/f with my Predator. Before I install my wideband and my o/r xpipe listed in my signature. I installed my Predator performance tune experianced slight detonation with 93 octance. From reading countless posts on the internet I took out timing and added fuel to eliminate detonation. Once I installed my o/r xpipe and wideband my a/f ratio was 11.5. So for me the wideband was helpful in tuning my Mach. Yeah I would like to put it on a dyno to see the numbers and get a graph but with the wideband I KNOW it is right and safe and is giving me the most power without a dyno tune.

With those mods tuning is minimal and really you should have experience.

SHAKEN · 01-21-2008, 01:49 PM

I feel I am experienced enough for what I am doing to my car.

vpMach1 · 01-21-2008, 02:44 PM

Quote:

Originally Posted by SHAKEN

I feel I am experienced enough for what I am doing to my car.

Does the OP?

SHAKEN · 01-21-2008, 03:06 PM

Quote:

Originally Posted by SHAKEN

Install a wideband and use your Predator to get you a/f right. Most muffler shops can install the o2 bung. If that is beyond your ability go to a CMR dealer and put it on a dyno. Since our mods are similar you should be safe maybe a little rich. My maf is in the factory position.

exactly!!!

vpMach1 · 01-21-2008, 03:27 PM

Quote:

Originally Posted by SHAKEN

exactly!!!

Ah hah!

socalmach · 01-21-2008, 04:01 PM

Quote:

Originally Posted by smbstyle

If you're worried about being "safe", i'd say the canned tune is fine for your setup, but if you're trying to squeeze every last drop of horsepower out of your setup, I'd go with getting it custom tuned.

Mach 1's come from the factory fairly rich, and a JLT intake might make it a little bit leaner, so I'd say you'd still be safe. The best way is to get an a/f meter on it and see for yourself.

The canned Predator tune sucks if you have any mods done. It will be way lean.

Newskool Mach · 01-21-2008, 04:24 PM

Quote:

Originally Posted by socalmach

The canned Predator tune sucks if you have any mods done. It will be way lean.

I had the canned tune with my mods and when he put it on the dyno without changing anything it was 13.9. waaay too lean. If your gonna spend all that money on mods why not another $150-$300 on a tune. You will see a difference and protect your motor at the same time. Not to mention you'll have dyno #'s to post.

3150Mach1 · 01-21-2008, 04:37 PM

Quote:

Originally Posted by Mach1Speed03

Hey fellow machs,
I had a question regarding the JLT RAI. I was interested in getting 1 and i wanted to know if putting it on will affect the A/F ratio. (will i need a custom dyno tune?) My current mods are bassani catback, bassani off-road X, and a Diablo Predator. Justins Performance Center says no. Any other opinions?

Quote:

Originally Posted by Mach1Marauder

Jay Tucker says it won't. It can depend on how the MAF is clocked. Just put it on, drive it easy until you can have your A/F checked to make sure.
MORE THAN LIKELY it will not be too lean.

M1M is right. The JLTs actually been know to make you run rich. Not sure why. Someone else suggested a wideband. I have one and use it all the time along with my predator to fine tune the air/fuel. You can get one installed for the cost of a dyno tune. Nice investment.

SHAKEN · 01-21-2008, 08:12 PM

Quote:

Originally Posted by 03Mach150BP

M1M is right. The JLTs actually been know to make you run rich. Not sure why. Someone else suggested a wideband. I have one and use it all the time along with my predator to fine tune the air/fuel. You can get one installed for the cost of a dyno tune. Nice investment.

I thought the wideband was the best investment after buying any hand held tuning device to take all the geuss work out of adjusting fuel at W.O.T. and data logging any timing adjustments. If you want to squeeze everthing out of you setup a Dyno tune is the only way to go.

mach1metalhead · 01-21-2008, 09:22 PM

i'm not tuned at all, but i have my Borla cat-back and soon i'll have an O/R Prochamber and a JLT RAI, will i NEED to be tuned or is it just advised?

2002BLGT · 01-21-2008, 11:02 PM

Quote:

Originally Posted by 03Mach150BP

M1M is right. The JLTs actually been know to make you run rich. Not sure why. Someone else suggested a wideband. I have one and use it all the time along with my predator to fine tune the air/fuel. You can get one installed for the cost of a dyno tune. Nice investment.

You are exactly right and here is proof

http://mach1registry.org/forums/showthread.php?t=75172

this tune was leaner than stock and it still ended up being very rich , I made this guy a new tune and leaned it out further which should fix everything now but as you can see the results with the JLT intake .......hope this will answer everyones questions about it .......a wideband is a good investment for anybody wanting to do a little tuning on their own .....

mach1metalhead · 01-23-2008, 09:50 PM

Quote:

Originally Posted by mach1metalhead

i'm not tuned at all, but i have my Borla cat-back and soon i'll have an O/R Prochamber and a JLT RAI, will i NEED to be tuned or is it just advised?

anyone got some input?

i know you all said we run a lil rich stock, and i'm thinking the RAI and the Prochamber & Cat-back exhaust would lean it out, but not to a problematic amount...

2002BLGT · 01-23-2008, 10:01 PM

Quote:

Originally Posted by mach1metalhead

anyone got some input?

i know you all said we run a lil rich stock, and i'm thinking the RAI and the Prochamber & Cat-back exhaust would lean it out, but not to a problematic amount...

should be fine , but getting the A/F checked is always a good idea ....

almach · 01-25-2008, 05:52 PM

When I put the JLT on the Mach I went and had it checked and it was lean, I went home and pulled it and put the stock back on. It could have been the car, I made an appoint with MPH and put the JLT back on the parking lot and got it tuned and fixed the issue. Each car is different, better safe than sorry get it checked.

03AV8R · 01-25-2008, 10:00 PM

Quote:

Originally Posted by SHAKEN

I thought the wideband was the best investment after buying any hand held tuning device to take all the geuss work out of adjusting fuel at W.O.T. and data logging any timing adjustments. If you want to squeeze everthing out of you setup a Dyno tune is the only way to go.

Actually, if you wanna squeeze everything out of the setup the dyno tune only gets you 90% of the way there.. The last fine tuning hasta be done under real load conditions while driving or racing at WOT ive found.. My A/F & timing always changes @ the track from where we left off at the dyno.. A couple degrees this way or that & a few % fuel this way or that dials it in sweet.. I picked up another full tenth fine tuning the car in the afternoon VS the morning.. Its possible the tuner could hit the magic #'s dead on with his dyno, but i cant see how, its just not the same conditions..

SHAKEN · 01-26-2008, 12:13 AM

Quote:

Originally Posted by 03AV8R

Actually, if you wanna squeeze everything out of the setup the dyno tune only gets you 90% of the way there.. The last fine tuning hasta be done under real load conditions while driving or racing at WOT ive found.. My A/F & timing always changes @ the track from where we left off at the dyno.. A couple degrees this way or that & a few % fuel this way or that dials it in sweet.. I picked up another full tenth fine tuning the car in the afternoon VS the morning.. Its possible the tuner could hit the magic #'s dead on with his dyno, but i cant see how, its just not the same conditions..

I dont drag race my Mach but I do like to tinker. I used to et bracket myself 22 years ago stopped like 12 years ago I had a great time. Got my name in the National Dragster a few times and had alot of fun. One of the greatest feelings is seeing the win light in the final round what a rush.

mach1metalhead · 01-27-2008, 12:33 AM

Quote:

Originally Posted by almach

When I put the JLT on the Mach I went and had it checked and it was lean, I went home and pulled it and put the stock back on. It could have been the car, I made an appoint with MPH and put the JLT back on the parking lot and got it tuned and fixed the issue. Each car is different, better safe than sorry get it checked.

are we talking dangerously lean or just "should be corrected" lean?

311-420 · 01-27-2008, 04:47 AM

Quote:

Originally Posted by mach1metalhead

are we talking dangerously lean or just "should be corrected" lean?

you obviously are not getting the picture. you heat the piston up more than what its designed for, it will punish you. plain, and simple.

mach1metalhead · 01-27-2008, 04:27 PM

Quote:

Originally Posted by 311-420

you obviously are not getting the picture. you heat the piston up more than what its designed for, it will punish you. plain, and simple.

i know what lean is...

i mean are we talking like 9:1 or 13:1... cause they'd both be considered lean, but quite obviously, one is considerably less lean...

01-21-2008, 11:24 AM	#1
Mach1Speed03 Registered User Join Date: Mar 2007 Location: MD. Posts: 112	Will JLT RAI affect my A/F wit my setup? Hey fellow machs, I had a question regarding the JLT RAI. I was interested in getting 1 and i wanted to know if putting it on will affect the A/F ratio. (will i need a custom dyno tune?) My current mods are bassani catback, bassani off-road X, and a Diablo Predator. Justins Performance Center says no. Any other opinions?

01-21-2008, 11:28 AM	#2
FloridaOrange SCS Homie Join Date: Jan 2005 Location: Southwest Florida Posts: 3,643	Re: Will JLT RAI affect my A/F wit my setup? I'd definitely get it checked. The key is the mid pipe with the RAI. Are you running a custom tune through the Diablo or the canned tune. If canned DEFINITELY. Usually, the canned tunes are set up for a stock car, not a modded one.

01-21-2008, 11:56 AM	#3
smbstyle Guest Join Date: Jan 2008 Location: Tampa, FL Posts: 448	Re: Will JLT RAI affect my A/F wit my setup? If you're worried about being "safe", i'd say the canned tune is fine for your setup, but if you're trying to squeeze every last drop of horsepower out of your setup, I'd go with getting it custom tuned. Mach 1's come from the factory fairly rich, and a JLT intake might make it a little bit leaner, so I'd say you'd still be safe. The best way is to get an a/f meter on it and see for yourself.

01-21-2008, 12:12 PM	#4
SHAKEN Registered User Join Date: Oct 2003 Location: Dearborn Heights Michigan Posts: 794	Re: Will JLT RAI affect my A/F wit my setup? Install a wideband and use your Predator to get you a/f right. Most muffler shops can install the o2 bung. If that is beyond your ability go to a CMR dealer and put it on a dyno. Since our mods are similar you should be safe maybe a little rich. My maf is in the factory position. __________________ Accufab 60 mm twin Throttle body (Thanks Wutang) Predator Custom Tune +.5 lean,+.5 lean 2k up 4k up LC1 w/Ometer display 12.9- 12.7 AFR 2k-7k Mach 1 Floormats Roy Spacer IAC plate MGW Mach 1 License plate frame NGK TR55IX Iridium Bassini o/r X (Thanks cmylxgo) SteedaTri-ax 2.5" Stainless Pypes flowtubes 2.5x2.25 delta 40's Stainless 3 disk Car Chemistry inserts Factory tails quiet at idle and LOUD on the gas

01-21-2008, 01:24 PM	#6
SHAKEN Registered User Join Date: Oct 2003 Location: Dearborn Heights Michigan Posts: 794	Re: Will JLT RAI affect my A/F wit my setup? My mods are about the same. I have a wideband and I had to adjust my a/f with my Predator. Before I install my wideband and my o/r xpipe listed in my signature. I installed my Predator performance tune experianced slight detonation with 93 octance. From reading countless posts on the internet I took out timing and added fuel to eliminate detonation. Once I installed my o/r xpipe and wideband my a/f ratio was 11.5. So for me the wideband was helpful in tuning my Mach. Yeah I would like to put it on a dyno to see the numbers and get a graph but with the wideband I KNOW it is right and safe and is giving me the most power without a dyno tune. __________________ Accufab 60 mm twin Throttle body (Thanks Wutang) Predator Custom Tune +.5 lean,+.5 lean 2k up 4k up LC1 w/Ometer display 12.9- 12.7 AFR 2k-7k Mach 1 Floormats Roy Spacer IAC plate MGW Mach 1 License plate frame NGK TR55IX Iridium Bassini o/r X (Thanks cmylxgo) SteedaTri-ax 2.5" Stainless Pypes flowtubes 2.5x2.25 delta 40's Stainless 3 disk Car Chemistry inserts Factory tails quiet at idle and LOUD on the gas

01-21-2008, 01:49 PM	#8
SHAKEN Registered User Join Date: Oct 2003 Location: Dearborn Heights Michigan Posts: 794	Re: Will JLT RAI affect my A/F wit my setup? I feel I am experienced enough for what I am doing to my car. __________________ Accufab 60 mm twin Throttle body (Thanks Wutang) Predator Custom Tune +.5 lean,+.5 lean 2k up 4k up LC1 w/Ometer display 12.9- 12.7 AFR 2k-7k Mach 1 Floormats Roy Spacer IAC plate MGW Mach 1 License plate frame NGK TR55IX Iridium Bassini o/r X (Thanks cmylxgo) SteedaTri-ax 2.5" Stainless Pypes flowtubes 2.5x2.25 delta 40's Stainless 3 disk Car Chemistry inserts Factory tails quiet at idle and LOUD on the gas

01-21-2008, 09:22 PM	#16
mach1metalhead Registered User Join Date: Oct 2007 Location: Orlando, FL Posts: 1,065	Re: Will JLT RAI affect my A/F wit my setup? i'm not tuned at all, but i have my Borla cat-back and soon i'll have an O/R Prochamber and a JLT RAI, will i NEED to be tuned or is it just advised? __________________ 03 Mach (Auto) JLT RAI - 1/2" Intake Spacer - Mac longtubes - Mac Prochamber - Borla cat-back - PA Racing k-member - Energy Suspension motor mounts - Eibach Sportline springs - Eibach anti-roll kit - SPC caster/camber kit - Steeda X2 ball-joints - Steeda strut tower bar - Eibach 1" wheel spacers (rear only)

01-25-2008, 05:52 PM	#20
almach Registered User Join Date: Sep 2003 Location: North Alabama Posts: 27	Re: Will JLT RAI affect my A/F wit my setup? When I put the JLT on the Mach I went and had it checked and it was lean, I went home and pulled it and put the stock back on. It could have been the car, I made an appoint with MPH and put the JLT back on the parking lot and got it tuned and fixed the issue. Each car is different, better safe than sorry get it checked. __________________ Black and Gold 03 Mach 33 Ford 5 window 57 chevy belair 65 Pontiac All cars in some state of Build

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