Is MAF Conversion worth it?

drewmp28 · 12-13-2002, 11:56 AM

I have an 88LX Speed density ( it currently has a 302 non-HO from a t-bird) But I am putting in a 302 HO from a 93GT,it is pretty much stock, is it worth it to convert to mass air and put bigger injectors and fuel pump, or is it a waste of money? I plan to put on a Gt40 intake and possibly roller rockers, I run 3.55 gears and haev a K&N panel filter. Other than that probably won't be doing too myuch more to it. what about putting in a cold air induction kit and leaving it speed density? Let me know what you all think!

cyberstang5.0 · 12-13-2002, 12:01 PM

If you get more HP out of it, it's always worth it

bigred90gt · 12-13-2002, 12:19 PM

Are you getting the engine complete with computer and all? I believe the computers out of the 89 and up are different because of the speed density to mass air change. Someone please correct me if I'm wrong, I don't want to give false info.
Caymon

Dark_5.0 · 12-13-2002, 12:21 PM

With your mild mods you would lose HP with mass air.

You can mod the hell out of speed density and get good results.

PM me if you have any specific questions.

drewmp28 · 12-13-2002, 12:25 PM

I am getting a computer from a 93 GT coming with the motor.

spankaveli · 12-13-2002, 05:55 PM

if you dont plan on going with a big cam (bigger than an E-cam) or boost, you'll be faster if you stay speed density.

blk88lx · 12-13-2002, 10:35 PM

Drew,

You'll get the computer if I let you have it.

greydan · 12-15-2002, 12:01 AM

Question is how do you modify speed-density? Other than adjusting fuel pressure and timing .
I don't see anyone talking about how it's done. No-one selling meters or anything for speed-density.

tireburner163 · 12-15-2002, 01:35 AM

Quote:

Originally posted by greydan
I don't see anyone talking about how it's done. No-one selling meters or anything for speed-density.

Talk to 88WorkCar, he's your man when it comes to SD.

No one is selling meters, because SD doesn't use a meter.

88workcar · 12-15-2002, 07:17 AM

Change the pump, only because yours is 14 years old, a 155lph will be fine. The Cobra is cheaper than a GT-40, that and a 65mm TB will be good also. The injectors, you may want those proffesionally cleaned, but do not go bigger. I have used 19lbs up to 380hp, you will hear that that is a no-no but it workered flawlessly for me for over too years. Yet it would not accept the 24lb. 3.55s are good, I prefer a little more, but that is a choice thing. It will be hard to get to the twelve's without quite a bit more power, with 3.55s. The rockers are ok also, I have a set in the shed, yet to put them on this motor. Don't look for any gains from them, just piece of mind that they are better is worth putting them on. You can put a B or E cam, A WR1087, CC258, or any thing close to those profiles with out a doubt. Even heads like Edelbroc, POWERHEADS, Winsor jrs, ect... I am not sure about the really big boys, but these CAN get you to 11s. Good luck keep in touch.

Chevyguy · 12-15-2002, 10:34 AM

The speed density cars are indeed faster in stock form. The stock MAF is restrictive, and the 87 and 88 motors also had a more agressive stock cam ( people forget that in comparisons)

If you upgrade to a larger MAF, you already have a Mass air computer, and it should run just fine that way. The mass air cars are easier to tune, and change calibrations for different injector sizes. Also automatically adjusts for intake, head or exhaust changes. The SD guys have come pretty far, but it involves more tricks and work than it seems. To keep the car SD would involve finding a wire harness ( if it was changed) and computer from a HO SD motor, since you mentioned you have a non HO motor in there. Seems easier to go to MAF in your case

That's my 0.02

302man · 12-15-2002, 10:44 AM

I have the understanding that with any SD or MAF car, you wan to move the IAC sensor out of the number 5 runner and put it in the intake tube some where. I have pulled quite a few out of stangs and they are all crudded up by oil residue from the PVC system. I know they made this change on the 94-95 's on up. Anyone have any performance gains if any from this ?

88workcar · 12-15-2002, 07:12 PM

The only gain from it is the fact that it stays clean. MMFF did a test on the dyno. No Gain. I did it, no gain, stays clean

302man · 12-15-2002, 08:44 PM

You know what they say... "A clean ACT is a HAPPT ACT !"

12-13-2002, 11:56 AM	#1
drewmp28 Registered Member Join Date: Dec 2002 Location: Maryland Posts: 11	Is MAF Conversion worth it? I have an 88LX Speed density ( it currently has a 302 non-HO from a t-bird) But I am putting in a 302 HO from a 93GT,it is pretty much stock, is it worth it to convert to mass air and put bigger injectors and fuel pump, or is it a waste of money? I plan to put on a Gt40 intake and possibly roller rockers, I run 3.55 gears and haev a K&N panel filter. Other than that probably won't be doing too myuch more to it. what about putting in a cold air induction kit and leaving it speed density? Let me know what you all think!

12-13-2002, 12:19 PM	#3
bigred90gt 2 Stangs in the Stable Join Date: Apr 2002 Location: Baytown, TX Posts: 1,209	Are you getting the engine complete with computer and all? I believe the computers out of the 89 and up are different because of the speed density to mass air change. Someone please correct me if I'm wrong, I don't want to give false info. Caymon __________________ '90 GT Under construction Best E.T. = Fast @ High Speeds - OK So I Lie. So What!!! 04 F-150 STX 4.2L 5 spd Rice Haters Club Member #128

12-13-2002, 12:21 PM	#4
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	With your mild mods you would lose HP with mass air. You can mod the hell out of speed density and get good results. PM me if you have any specific questions. __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

12-13-2002, 12:25 PM	#5
drewmp28 Registered Member Join Date: Dec 2002 Location: Maryland Posts: 11	Computer I am getting a computer from a 93 GT coming with the motor.

12-13-2002, 05:55 PM	#6
spankaveli Registered Member Join Date: Aug 2002 Location: Gonzales, Louisiana Posts: 153	if you dont plan on going with a big cam (bigger than an E-cam) or boost, you'll be faster if you stay speed density. __________________ Old car - 87 LX Pics New car - 02 WRX Pics & Mods

12-13-2002, 12:01 PM	#2
cyberstang5.0 347ci of HORSE POWER!!! Join Date: Jul 2001 Location: Houston, TX Posts: 1,416	If you get more HP out of it, it's always worth it

12-13-2002, 10:35 PM	#7
blk88lx Registered Member Join Date: Jun 2001 Location: Fort Leonard Wood, MO Posts: 179	Drew, You'll get the computer if I let you have it.

12-15-2002, 12:01 AM	#8
greydan Registered Member Join Date: Jan 2001 Location: clawson, mi. Posts: 32	speed-density mods. Question is how do you modify speed-density? Other than adjusting fuel pressure and timing . I don't see anyone talking about how it's done. No-one selling meters or anything for speed-density.

12-15-2002, 07:17 AM	#10
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	Change the pump, only because yours is 14 years old, a 155lph will be fine. The Cobra is cheaper than a GT-40, that and a 65mm TB will be good also. The injectors, you may want those proffesionally cleaned, but do not go bigger. I have used 19lbs up to 380hp, you will hear that that is a no-no but it workered flawlessly for me for over too years. Yet it would not accept the 24lb. 3.55s are good, I prefer a little more, but that is a choice thing. It will be hard to get to the twelve's without quite a bit more power, with 3.55s. The rockers are ok also, I have a set in the shed, yet to put them on this motor. Don't look for any gains from them, just piece of mind that they are better is worth putting them on. You can put a B or E cam, A WR1087, CC258, or any thing close to those profiles with out a doubt. Even heads like Edelbroc, POWERHEADS, Winsor jrs, ect... I am not sure about the really big boys, but these CAN get you to 11s. Good luck keep in touch. __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

12-15-2002, 10:34 AM	#11
Chevyguy Backyard Mechanic/Chemist Join Date: Feb 2001 Location: Acton MA USA Posts: 435	The speed density cars are indeed faster in stock form. The stock MAF is restrictive, and the 87 and 88 motors also had a more agressive stock cam ( people forget that in comparisons) If you upgrade to a larger MAF, you already have a Mass air computer, and it should run just fine that way. The mass air cars are easier to tune, and change calibrations for different injector sizes. Also automatically adjusts for intake, head or exhaust changes. The SD guys have come pretty far, but it involves more tricks and work than it seems. To keep the car SD would involve finding a wire harness ( if it was changed) and computer from a HO SD motor, since you mentioned you have a non HO motor in there. Seems easier to go to MAF in your case That's my 0.02 __________________ 2001 Crown Vic Maurader Airbox/MAF, DR chip Edel IAS shocks Single exhaust :wtf: 93 P-71 Vic interceptor Backup car now 90 5.0 LX Notch SOLD 74 Chevy Laguna type S-3 454 under construction Currently apart undergoing bodywork.

12-15-2002, 10:44 AM	#12
302man Registered Member Join Date: Jul 1999 Location: INDIANAPOLIS Posts: 404	I have the understanding that with any SD or MAF car, you wan to move the IAC sensor out of the number 5 runner and put it in the intake tube some where. I have pulled quite a few out of stangs and they are all crudded up by oil residue from the PVC system. I know they made this change on the 94-95 's on up. Anyone have any performance gains if any from this ? __________________ old S trim combo 10.13@ 135 New YS combo = 680RWHP (no times)

12-15-2002, 07:12 PM	#13
88workcar Registered Member Join Date: Oct 1999 Location: Pierre Part, La. U.S.A. Posts: 1,850	The only gain from it is the fact that it stays clean. MMFF did a test on the dyno. No Gain. I did it, no gain, stays clean __________________ 88workcar 1988 Mustang LX 342. 417rwhp @ 6800. 28 X 10 ET Drag, 4.30s, 10.69 @ 126.43 1.42 60ft. 11.13 @ 127.7 on BFGs 1.72 60ft Rice Hater # 42 To be old and wise, You must first be young and stupid I'm somewhere in tthe middle.

12-15-2002, 08:44 PM	#14
302man Registered Member Join Date: Jul 1999 Location: INDIANAPOLIS Posts: 404	You know what they say... "A clean ACT is a HAPPT ACT !" __________________ old S trim combo 10.13@ 135 New YS combo = 680RWHP (no times)

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