4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

4.6L GT Intake Spacer ??

Old 02-16-2006, 03:58 AM
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Default RE: 4.6L GT Intake Spacer ??


Personally, I havnt seen any real BIG gains from those spacers, but that doesnt mean they're not worth it.

As far as throttle body sizes go, I would go with a 70mm if you plan on staying Naturally Aspirated or are just doing bolt ons. Its not worth it to go to a 75mm, as those are designed for more FI setups.

MAF and Fuel injectors, dont even waste your time. You would need to get a retune to accomidate for the change, and the stock MAF is good up to 400HP before it pegs, a place you're not going to get to with just bolt ons.

I agree with everything you posted with one exception. I recommend the 75mm TB even for N/A motors. I ran it on my old motor and didn't see it as overkill and I am running it on my new N/A motor.

Also, I want to agree and restate what you posted and what I have been saying FOREVER..."Guys, DON'T waste your $$$$ on a MAF unless you go FI and then if you do, get a Lightning 90mm MAF".
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Old 02-16-2006, 04:07 AM
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Default RE: 4.6L GT Intake Spacer ??


Get the plenum and 75mm tb and don't waste your $$ on a MAF (mass air) unless you go with a supercharger or turbo. If you want the bling, go with Accufab...if you are only interested in performance, get the C&L plenum and BBk 75mm throttle body.
OH YEAH!!! ++++1 for teh BLING! I really liked my accufab and ported plenum with TB and Plenum spacers. VERY Blingish. lol. Those spacers are like 30 bucks for the both of them. they dont hurt anything, so why not???????
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Old 02-16-2006, 04:07 AM
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Default RE: 4.6L GT Intake Spacer ??

I dont have any dyno numbers to back up my 70mm v 75mm claim, so I cant say if you are right or wrong.

I dont see why more flow wouldnt hurt the engine, although I would think it would lean you out a little more than you would like. I dunno though. I would have to install them both on the same car and see if there was any difference.
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