new computer or chip?

venumus93 · 02-14-2002, 08:51 PM

Hey everyone!
I have had alot of people tell me that I should ditch my 93 cobra computer & get an A9L for better performance. Then I would have to get a new MAF calibrated to the A9L so the car would run correctly. I'm just wondering if I could just get a chip burned for my car to recalibrate the computer & keep my stock MAF, etc. After the new tires & rear LCA's, this will be my next mod, so any adice is appreciated! Later!

Unit 5302 · 02-14-2002, 09:36 PM

Do you need to recalibrate for the 24lbers? I have heard that the MAF is calibrated for 19lbers but the computer is setup for 24's, but I can't confirm that.

347strokedpony · 02-14-2002, 10:36 PM

If I am not mistaken, the A9L is only calibrated for 19# injectors and is used for the manual trans GT, so I would say keep your X3Z computer calibrated for 24# injectors and would also advise against installing a chip, those are really only for unmodified vehicles and only alter WOT calibrations. I would suggest, for complete control throughout the power curve, investing in a SpeedBrain. (www.speedbrain.com)

venumus93 · 02-15-2002, 07:27 AM

Quote:

Originally posted by Unit 5302
Do you need to recalibrate for the 24lbers? I have heard that the MAF is calibrated for 19lbers but the computer is setup for 24's, but I can't confirm that.

Unit:
That is my question as well. I am not up to speed on this computer thing & am not sure if there is a speed shop around here who could give me a good answer specifically for my car.
347:
Ok, I'll bite....what is a Speedbrain exactly & how could it help me....?

cyberstang5.0 · 02-15-2002, 08:29 AM

You might want to check out Johnson Motorsports. They make custom burnt chips for any application. You can mail order it. All you need to do is e-mail or call them and let them know what you have and they will burn different setups for you. You "try out" all four chips and the one that works the best, you run with that one. It only costs $310 for everything. I am in the process of getting one myself. From what I have been told by several people, JM makes some of the best chips out there.

(PM me if you have any other questions)

drudis · 02-15-2002, 09:17 AM

My 1989 came stock with an A9L. I did a few minor bolt-ons, and removed some emissions stuff. Getting (someday) ready for an S-trim which will need new calibration, so I got the chip now...

So I got a www.jmschip.com chip. On a bone stock motor, with pulleys, and headers/offroads I pulled 237rwhp. This was on the third chip (of the three I tested) and made 7 rwhp more than the other two, but 12 more than stock.
I was happy.

BLWN327 · 02-15-2002, 09:48 AM

bad thing with a chip is you have to get it reburnt with every mod http://hapygas.stangnet.com

twofast · 02-15-2002, 11:10 AM

venumus93, why do you need a chip?

venumus93 · 02-15-2002, 12:55 PM

twofast:
I was told by a couple different people that my stock 93cobra computer is actually hurting me at the track as it retards timing or something, and I thought a chip may be the better solution than replacing my computer & MAF(easier & cheaper). I just want to get the most out of my stock motor with external mods for now, so I'm just making plans for the future right now. Right now I would be happy just to be able to afford some sticky tires, but you allknow I won't stop there, this mod thing is too addicting! Thanks for all the advice everyone!

347strokedpony · 02-15-2002, 01:06 PM

The speedbrain is a computer programmed to the specs of your car. If you plan on adding other mods, I would wait to have one programmed, since I am not sure whether it can be reprogrammed andit isn't cheap. Until that time, I would stick with what you have. My computer is still stock, but I wouldn't mind upgrading to an X3Z, only because it's calibrations are closer to the specs of my car(increased MAF and larger injectors). However, in the long run, since I plan on adding a Kenne Bell roots style SC, I will want to go with a programmable ECM, such as the SpeedBrain You said you were told in order for your car to run correctly that the A9L would fix the problem, how is your stang running incorrectly?

red82gt · 02-15-2002, 04:35 PM

The computer reads the voltage from the mass air sensor and tells it how much air is coming in. So if you have a mass air meter that is calibrated to match the injectors it will not work any differently with 24# injectors than it will with 19#ers, no need to get a computer calibrated for the injector size unless you've got, say 36#ers on a bolt on motor and it's running too rich at WOT. The peg leg of the Cobra computer is the weak timing curves and it also pulls timing during shifts. The mass-air meter isn't well matched to the computer and most cobras have a stumble just off idle because of this.

Basically, if I was you, I'd get a C&L 76mm mass air sensor (calibrated for 24#ers) and a good custom chip or the C&L with a A9L. I've heard of many near stock Cobras trapping 104mph with an A9L and a good mass air meter.

Unit 5302 · 02-15-2002, 04:53 PM

Get an EEC tuner before getting all that custom burned for your application chip stuff. The EEC tuner will allow you to alter your settings when you want to, and it is tuneable.

As far as the stock 73mm MAF on the Cobra, I haven't heard of problems with it's calibrations. To my understanding the MAF is calibrated for 19lb/hr injectors, and the computer itself is setup for 24lb/hr units.

Going to the new C&L 76mm MAF and an EEC tuner will more than likely give you a hefty performance increase, but I just can't say for sure whether its the computer calibrated for 24's or the MAF, but from what I've heard, it's the computer.

BTW. The weak fuel/timing curves aren't the real reason I think the Cobra's computer is so weak. It's the 7sec delay going into open loop. Everything that can be bad about it, is. You have the potential to unlock 20hp+ easy and a few tenths from your 1/4 mile just by changing the computer system.

BilLster · 02-15-2002, 11:59 PM

I was reading some ford tech litiriture and was suprised to find out that evac eec eev computer are calibrated for the same voltage and the get the maf to adjust for injector size that way they could use the same computers in a variety of vehicles .
it also supportes C&L claims of other companies fololing the computer also .

the cobra computer is the weakest of these computers because of
enviromntal concerns on a performance optioned car.

alot of renegade racers have started using the A9L because it is the best of the stock computers.

i would say get a A9L and a c&L 73 mm maf with the 24lbs tube and see how that works both can be had pretty cheap.

Unit 5302 · 02-16-2002, 01:59 AM

More or less the Cobra was detuned to avoid blowing the T-5 up. Environmental concerns probably had a small part to deal with it.

02-14-2002, 08:51 PM	#1
venumus93 Registered Member Join Date: Jun 2001 Location: West Melbourne, FL, USA Posts: 237	new computer or chip? Hey everyone! I have had alot of people tell me that I should ditch my 93 cobra computer & get an A9L for better performance. Then I would have to get a new MAF calibrated to the A9L so the car would run correctly. I'm just wondering if I could just get a chip burned for my car to recalibrate the computer & keep my stock MAF, etc. After the new tires & rear LCA's, this will be my next mod, so any adice is appreciated! Later! __________________ 93Cobra#3974, 114K miles 3.55's, flo's, pullies, C&L 1/4: 13.985 60': 2.088 (street tires) MPH: 99.58

02-14-2002, 10:36 PM	#3
347strokedpony Registered Member Join Date: Feb 2002 Location: Amarillo, TX Posts: 4	new computer or chip If I am not mistaken, the A9L is only calibrated for 19# injectors and is used for the manual trans GT, so I would say keep your X3Z computer calibrated for 24# injectors and would also advise against installing a chip, those are really only for unmodified vehicles and only alter WOT calibrations. I would suggest, for complete control throughout the power curve, investing in a SpeedBrain. (www.speedbrain.com)

02-15-2002, 09:17 AM	#6
drudis Moderator Join Date: Dec 1999 Location: Livonia, MI, USA Posts: 1,194	My 1989 came stock with an A9L. I did a few minor bolt-ons, and removed some emissions stuff. Getting (someday) ready for an S-trim which will need new calibration, so I got the chip now... So I got a www.jmschip.com chip. On a bone stock motor, with pulleys, and headers/offroads I pulled 237rwhp. This was on the third chip (of the three I tested) and made 7 rwhp more than the other two, but 12 more than stock. I was happy. __________________ Darius Rudis, Moderator Corner Carvers Delight 1989 Mustang LX - Open Track Car http://www.dariusrudis.com

02-15-2002, 09:48 AM	#7
BLWN327 Registered Member Join Date: Jul 2000 Location: fair haven,mi,u.s. Posts: 34	bad thing with a chip is you have to get it reburnt with every mod http://hapygas.stangnet.com __________________ BLWN327 My Web Site 1994 Mustang GT - All forged 327 stroker from CCM,check out the extensive list of mods here

02-15-2002, 11:10 AM	#8
twofast Registered Member Join Date: Jan 2002 Posts: 8	venumus93, why do you need a chip? __________________ 94gt incon tt _ 10.78@130 497rwhp/528rwtq 68 stang 351w _ 12.99@106 my stangs update 9-03-02

02-14-2002, 09:36 PM	#2
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Do you need to recalibrate for the 24lbers? I have heard that the MAF is calibrated for 19lbers but the computer is setup for 24's, but I can't confirm that.

02-15-2002, 08:29 AM	#5
cyberstang5.0 347ci of HORSE POWER!!! Join Date: Jul 2001 Location: Houston, TX Posts: 1,416	You might want to check out Johnson Motorsports. They make custom burnt chips for any application. You can mail order it. All you need to do is e-mail or call them and let them know what you have and they will burn different setups for you. You "try out" all four chips and the one that works the best, you run with that one. It only costs $310 for everything. I am in the process of getting one myself. From what I have been told by several people, JM makes some of the best chips out there. (PM me if you have any other questions)

02-15-2002, 12:55 PM	#9
venumus93 Registered Member Join Date: Jun 2001 Location: West Melbourne, FL, USA Posts: 237	twofast: I was told by a couple different people that my stock 93cobra computer is actually hurting me at the track as it retards timing or something, and I thought a chip may be the better solution than replacing my computer & MAF(easier & cheaper). I just want to get the most out of my stock motor with external mods for now, so I'm just making plans for the future right now. Right now I would be happy just to be able to afford some sticky tires, but you allknow I won't stop there, this mod thing is too addicting! Thanks for all the advice everyone! __________________ 93Cobra#3974, 114K miles 3.55's, flo's, pullies, C&L 1/4: 13.985 60': 2.088 (street tires) MPH: 99.58

02-15-2002, 01:06 PM	#10
347strokedpony Registered Member Join Date: Feb 2002 Location: Amarillo, TX Posts: 4	The speedbrain is a computer programmed to the specs of your car. If you plan on adding other mods, I would wait to have one programmed, since I am not sure whether it can be reprogrammed andit isn't cheap. Until that time, I would stick with what you have. My computer is still stock, but I wouldn't mind upgrading to an X3Z, only because it's calibrations are closer to the specs of my car(increased MAF and larger injectors). However, in the long run, since I plan on adding a Kenne Bell roots style SC, I will want to go with a programmable ECM, such as the SpeedBrain You said you were told in order for your car to run correctly that the A9L would fix the problem, how is your stang running incorrectly?

02-15-2002, 04:35 PM	#11
red82gt Sober voice of Reason Join Date: Nov 1998 Location: Kelowna, B.C., Canada Posts: 1,514	The computer reads the voltage from the mass air sensor and tells it how much air is coming in. So if you have a mass air meter that is calibrated to match the injectors it will not work any differently with 24# injectors than it will with 19#ers, no need to get a computer calibrated for the injector size unless you've got, say 36#ers on a bolt on motor and it's running too rich at WOT. The peg leg of the Cobra computer is the weak timing curves and it also pulls timing during shifts. The mass-air meter isn't well matched to the computer and most cobras have a stumble just off idle because of this. Basically, if I was you, I'd get a C&L 76mm mass air sensor (calibrated for 24#ers) and a good custom chip or the C&L with a A9L. I've heard of many near stock Cobras trapping 104mph with an A9L and a good mass air meter. __________________ 393W: AFR 205's, hydraulic roller, TKO600.

02-15-2002, 04:53 PM	#12
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	Get an EEC tuner before getting all that custom burned for your application chip stuff. The EEC tuner will allow you to alter your settings when you want to, and it is tuneable. As far as the stock 73mm MAF on the Cobra, I haven't heard of problems with it's calibrations. To my understanding the MAF is calibrated for 19lb/hr injectors, and the computer itself is setup for 24lb/hr units. Going to the new C&L 76mm MAF and an EEC tuner will more than likely give you a hefty performance increase, but I just can't say for sure whether its the computer calibrated for 24's or the MAF, but from what I've heard, it's the computer. BTW. The weak fuel/timing curves aren't the real reason I think the Cobra's computer is so weak. It's the 7sec delay going into open loop. Everything that can be bad about it, is. You have the potential to unlock 20hp+ easy and a few tenths from your 1/4 mile just by changing the computer system.

02-15-2002, 11:59 PM	#13
BilLster Registered Member Join Date: Oct 2000 Location: Ontario canada Posts: 446	I was reading some ford tech litiriture and was suprised to find out that evac eec eev computer are calibrated for the same voltage and the get the maf to adjust for injector size that way they could use the same computers in a variety of vehicles . it also supportes C&L claims of other companies fololing the computer also . the cobra computer is the weakest of these computers because of enviromntal concerns on a performance optioned car. alot of renegade racers have started using the A9L because it is the best of the stock computers. i would say get a A9L and a c&L 73 mm maf with the 24lbs tube and see how that works both can be had pretty cheap. __________________ 89 with 331 t3'/t4 hybrids. upr Suspention worked out finnaly . 9.89 144 mph .

02-16-2002, 01:59 AM	#14
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	More or less the Cobra was detuned to avoid blowing the T-5 up. Environmental concerns probably had a small part to deal with it.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Computer chip and ET's	DaTank	Windsor Power	14	04-07-2003 08:53 PM
Computer Chip	1989stanger	Windsor Power	1	11-09-2002 04:12 PM
Dealer Blew My Computer, Because Of My Chip	WHC3RD	Modular Madness	1	10-20-2002 11:36 AM
JMS Chip and 94/95 computer	moponys	Windsor Power	6	09-24-2001 04:33 PM
Computer Chip	98'MustangGT	Modular Madness	3	07-09-2000 03:35 PM