sct big air or pmass??? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 14 Old 02-02-2007, 01:20 AM Thread Starter
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sct big air or pmass???

I am getting ready to order a mass air meter but I dont know what to get, a sct big air or a pmass 3" blowthru? Any opinions on the two would be very helpful. It is going on my capri, it has a 347 trick flow topend and 50# injectors b&g turbo hot side w/ pt68 turbo. Thanks

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post #2 of 14 Old 02-02-2007, 07:58 AM
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My 3"pmass blow-thru works great(drivability,idle,power), maybe the sct does as well????


89'LX 306,T.W.heads,perf.intake,36's,stock cam/1.7's,70mmT.B.,T-56,3.27's,Twin 60/63 T3's intercooled,14psi,Evolution WG's, Meth inj.
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post #3 of 14 Old 02-02-2007, 09:20 AM
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Originally Posted by MOOVS View Post
My 3"pmass blow-thru works great(drivability,idle,power), maybe the sct does as well????

Same here

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post #4 of 14 Old 02-02-2007, 10:19 AM Thread Starter
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do the pmass blow thrus have any problems "maxing out"?
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post #5 of 14 Old 02-06-2007, 06:40 PM
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PMAS here and I have not have any problems maxing the meter out so far. What power range are you looking at?

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post #6 of 14 Old 02-06-2007, 09:52 PM
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What does your tuner use?
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post #7 of 14 Old 02-07-2007, 11:12 AM Thread Starter
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I am looking 500-600max rwhp, my tuner told me to try to get my hands on a pro m, pmass. I just ordered a pmass 3"blowthrough from JD's performance so i guess we will see how it works out. He told me it would take a couple days for them to build to my specs so I should see it end of week or beginning of next. Thanks for the help guys.
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post #8 of 14 Old 02-22-2007, 03:59 PM
 
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Whatever your tuner likes best is what you should go with.

But, the SCT meter will work just as good as the PMAS meter as well. Both are good choices.
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post #9 of 14 Old 02-22-2007, 07:57 PM
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My meter (3 inch blow through) did take a while to come but once I got it, I never looked back. GL

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post #10 of 14 Old 02-22-2007, 09:57 PM
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Blow-thru meters will "peg" before a suck-thru on the same setup. Depending on the setup maybe much quicker.

A blow-thru right after a bend you'll be much more likely to have driveability issues that can't be tuned out. This is because air will flow smoother across the elements during suck-thru than blow-thru. This turbulance can cause noise in the meter signal to the computer. This signal is a 0-5 vdc signal and the computer doesn't deal with noise spikes very well.

Putting a bend right in front of the blow-thru can make the problem worse. Of course with a blow-thru the intake tubing and blow off setup can be much simpler. If you decide to use blow-thru try to give the air as much straight flow as possible into the meter.

I'd also check with your tuner. Some may have troubles tuning the SCT meter on a Fox body. It's not exactly hard but may take some experience to do well. This is because without special equipment that give fuel trim feedback from the computer tuning an air meter from scratch can take some time to do correctly.

The blow-thru calibrated for the injectors and blow-thru should be a bit more straight forward. I'm assuming the car is a fox-body.

If you decide on the SCT meter get at least the BA2800. The SCT meters are designed to be used in suck-thru. And can lose as much as 20-25% of their metering capability in blow-thru.

So all things weighed out I'd probably go with the blow-thru setup. This is rare for me because the SCT meters are top quality and very very consistent.

Thanks,

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Last edited by Edward Clark; 02-22-2007 at 10:00 PM.
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post #11 of 14 Old 02-23-2007, 12:08 AM Thread Starter
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Thanks for all the good info!

Last week i baught a 3" pmass blow thru meter, I will have to see how it works out. The guys that are going to tune it for me said they prefer the pmass blow thru meters.
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post #12 of 14 Old 02-25-2007, 12:21 PM
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I'll bet it's flawless.

89'LX 306,T.W.heads,perf.intake,36's,stock cam/1.7's,70mmT.B.,T-56,3.27's,Twin 60/63 T3's intercooled,14psi,Evolution WG's, Meth inj.
579.2rwhp 658.6rwtq,[email protected] kicked off track
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post #13 of 14 Old 02-25-2007, 02:46 PM Thread Starter
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had ther car running and took it for a little ride and it idled perfecty and it hasnt even been tuned yet. So far so good!
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post #14 of 14 Old 02-25-2007, 03:58 PM
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Originally Posted by Edward Clark View Post

If you decide on the SCT meter get at least the BA2800. The SCT meters are designed to be used in suck-thru. And can lose as much as 20-25% of their metering capability in blow-thru.

According to my tuner, the BA 2400 is a better meter for driveabilty and 550 and under. He's one of the top SCT tuner's in the nation.

Precision 67mm turbo, this and that.
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