70 or 75 mm tb for a 300 horse 4.6?

lman657 said:

Hey guys,

the p&p headswap/cams/headers/clutch/exhuast/injectors/maf project is nearly done!

Do you guys think i should go w/ a 70 or 75 mm BBK throttle body for my mustang with 24# injectors and C&L 80mm maf?

Thanks!
Lance

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lman657 said:

hey guys,

I'd like to spring for the plenum, however, i've already over-exerted my funds so far. Would it be possible, for the time being, to port the upper intake? I've got all the tools from porting heads, and use that for now until i can work up the money for it? I've been trying to go by the philosophy of "do it right the first time" but the 200 bucks more for an upper intake might be pushing it, as you can see, i've already dumped quite a lot of money into this project.

Thanks,
Lance

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Frank 03GT said:

If you're doing everything else, I can't see skipping on the plenum. I went from a ported stock plenum to a C&L and Accufab 75mm TB and felt a very noticable gain. More than I did from my Dr. Gas X-pipe even...

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KaPPaBaLL said:

ay ronnie, i've heard the accufab 75mm TB and the C&L plenum will make the GT run too lean?

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Sam98 said:

I don't see how...the engine can get more air, but the MAF will still accurately measure the amount used and the PCM will adjust the fuel accordingly...

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