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Old 04-29-2004, 21:23   #1 (permalink)
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MAF and TB question

I'm going to get bigger injectors so i need a new MAF....
I have a 65mm TB atm, is it pointless getting a 80mm MAF if the TB is only 65mm?

Is there going to be any benifit to performance getting a bigger TB? I know 80mm TB is too big so what size is good?
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Old 04-29-2004, 22:00   #2 (permalink)
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Re: MAF and TB question

whats other mods do you have?
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Old 04-29-2004, 22:27   #3 (permalink)
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Re: MAF and TB question

crane 2030 cam
edelbrock performer manifold
ACL race series 9.5:1 comp pistons
ported E7 heads, with bigger valves
1.6 roller rockers
exhaust...
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Old 04-29-2004, 22:28   #4 (permalink)
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Re: MAF and TB question

re: the MAF sensor itself, the original 5.0L Mustang/falcon air meter is SMALL! Roughly 55mm in diameter and is a restriction in the intake system. 5.0L Cobras use a 70mm MAF which is much better and the 5.8L Cobra R uses a 80mm MAF which is rather big and doesn't pose a real restriction until you massively increase the airflow capacity of the engine. As far as MAF sensors go, the 55mm MAF should be the first thing to go, as it can limit the amount of power the engine is capable of making. A larger diameter air meter will create less of a pressure drop and be less restrictive. If the engine internals are stock. I would prob go with 30# injectors seing as 24# are the same cost and you may need to upgrade 24# at some stage;and a 70 to 75mm maf. C&L do a 73mm for about 195US
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95 Mustang GT 302: VQ-S2 Vortech - Edelbrock Intake - BBK 70mm TB - UPR Boostpipe - TwEECer - Walbro 255 & T-Rex fuel pump - MSD btm - Crane HI-6 - 36# injectors - Pro-m 80mm MAF - Kirban FPR - FMS 9mm leads - FMS 3.73 Gears - Transgo Shift kit - B&M cooler - Saleen guage pod, FMS Boost and FP guages - R/H drive - Eibach Springs - Holley headers, http://www.meales.com.au
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Old 04-29-2004, 22:45   #5 (permalink)
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Re: MAF and TB question

A bigger throttle body will definitely slow you down by robbing you of low end torque if you have a stock 5.0 falc. 65mm is already an aftermarket size TB. if its a stock TB make sure your not measuring the external face which may be 65mm. but the internal where the butterfly closes..
My opinion 65mm TB and 73mm maf 24 or 30#'s will be a good combo. unless you've got mods we dont know about.. your profile dont say much
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Old 04-29-2004, 22:52   #6 (permalink)
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Re: MAF and TB question

LOL,, all that time i spent typing and you posted your mods.... damn it!!!!!!!..
dont see why you cant upgrade slighty.. 65mm TB should still work fine.. definite on 30# or 42#. you might find that the differnce between 65 and 70mm TB's is marginal.. and then your still prob better off spending the money elswhere for now than on the TB. definite go on the maf and injectors though.. get some dyno figures when you do it (when/if you do).. id be interested
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95 Mustang GT 302: VQ-S2 Vortech - Edelbrock Intake - BBK 70mm TB - UPR Boostpipe - TwEECer - Walbro 255 & T-Rex fuel pump - MSD btm - Crane HI-6 - 36# injectors - Pro-m 80mm MAF - Kirban FPR - FMS 9mm leads - FMS 3.73 Gears - Transgo Shift kit - B&M cooler - Saleen guage pod, FMS Boost and FP guages - R/H drive - Eibach Springs - Holley headers, http://www.meales.com.au
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Old 04-30-2004, 04:19   #7 (permalink)
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Re: MAF and TB question

Try http://performancepartsmall.com/ for a MAF.
Mine ended up way cheaper than I expected.
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Old 04-30-2004, 06:37   #8 (permalink)
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Re: MAF and TB question

No point getting bigger TB IMO, 65mm is not a restriction until you get to around 400hp. They also give much better throttle response than larger 70-75mm ones.
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Old 04-30-2004, 10:22   #9 (permalink)
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Re: MAF and TB question

sorry i didn't post this, i have a 65mm TB and a 73mm MAF, but it has 19lp config so....
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Old 04-30-2004, 22:48   #10 (permalink)
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Re: MAF and TB question

Might pay to get an adjustable fuel pressure regulator and a dyno tune if you didn't already.
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