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Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street
Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
I see many people run a larger MAS and throttle body. I believe this will be my next modification, can anyone tell me what kind of gains I might expect to see and feel. Is the bang worth the buck?
the bang for buck really only plays well with others if you have done chip exhaust and intake from what i have heard. if you just do that stuff it will not be able to make the best use of it and you will be very dissatisfied
Seeing that you've done the chip, filter, and catback, I'd say go with the BBK 66mm TB. From seeing other's experiences with the MAS, its better to use that $300 for other mods. With the BBK TB, you will feel some SOTP (seat of the pants) hp gain, maybe 3-4 horses, but a large throttle response improvement. I think it's worth the $200.
So say you've done the catback and the KKM filter would the Throttle body still be good or should you do the chip first?? Tourqe being the goal not so much horse power
If you're planning on getting a custom chip get the TB first, but get the 63mm Vanir one for less of a chance of bogging. If you're gonna get a generic chip, get the chip first then the BBK 66mm.
Superchip. You call them up and they send you a form to fill out with all your mods so they can modify their programs. Then they burn the chip and send it to you! I think it costs about $180 more than their generic chip. I also think that if you ever need it redone, you send it back and they do it free, you just pay shipping.
Why does everyone do the TB first? Air-flow restriction is found at the MAS. It doesn't seem logical to open up the TB if you are not allowing more air through the MAS. I will do both together when I do mine to make sure I free up the whole air intake system. IMO it would be foolish to do one without the other.
The factory MAS is larger than the factory TB and about the same size as the BBK 66mm TB. The flow numbers (CFM) for the factory MAS are theoretically enough for our 4.0's to reach upwards of 300 hp while the #s for the factory TB are deficient. I'm just relating my experiences and what I've heard, just suggesting. Good luck in whatever you try to do. When I get the money (not until the summer), I probably am going to upgrade my MAS; but I'm only doing this because I already have a supercharger and a full intake kit including stainless intake pipe. With the supercharger, I do not need to worry as much about the air velocity into the engine as the blower speeds the air up anyway. This is what I was worried about before. With a larger opening, the velocity slows and you might not get enough airspeed for efficiency.
Again, good luck and please post your results. My suggestion, do the mods one at a time (a day apart) to compare the gains with each.
That is what 4.0L performance told me when I bought my 72 mm Pro-Flow MAF from them. They said the stock MAF was smaller than the stock TB so putting a larger TB wouldn't do a thing until the MAF was replaced. Incidentally, I didn't feel or measure any performance gains with the larger MAF on my '94 4.0L Ranger with a cat-back system, SuperChip and K&N. I ran several runs with the stock MAF and with the larger one and couldn't tell any differences in my times or ETs at Milan Dragway in Michigan. Also, even on Pro-Flow's web site (Dead Link Removed) they list that a 55mm MAF is good for 320 HP and a 70mm MAF is good for 380 HP. That tells me the stock MAF is more than capable of providing enough air to most peoples engines.
The guys at 4.0L Performance are related to Central Coast Mustang, 5.0L Mustang guys always go with a larger MAS first and see 10-15hp gains. Some even leave their TB's alone. It stands to reason that if you are only flowing 55mm through the MAS, flowing 66mm at the TB is almost counterproductive. You must get rid of the restriction at the MAS, then open the TB. I do agree that the thing to do would be to add these one at a time to see what kind of gains each makes individually. When I do mine I will do the MAS first, then the TB. I will keep everyone posted. Thanks to all who replied to the thread, I appreciate everyone's input.
I had the TB first and the I got the MAS.... I got great throttle response from my TB... and didnt notice anything with the larger MAS. Kind of a waste of cash if you ask me... but I like knowing I have a larger one.
This guy is honest with his replies. I haven't purchased a TB or a MAS but I have read many reports in Mags relating to these two mods. Most report quicker throttle response(SOTP) with the TB but no power gains on the dynometer. The MAS provides no gain on the dyno and is reported to only benefit heavily modified engines (camms, modified heads,etc). Yes, they are both restrictions in the intake and should be close to the same diameter with the TB commonly a little smaller to increase velocity of the air. Lastly; only expect 1/2 of the advertised gains. Example: with hedders, K&N, new ignition, catback exhaust we should achieve 230HP! Those mods in reality get you less than 200HP.
Yup yup... listen to me... hehe.. for the most part at least... I wasted a good deal of money at the dyno after most of my mods... At best, I only get about 145hp at the wheels with all my mods. Which is what, about 185hp engine? The TB is still a good buy if you ask me though. Nice response.
but I think my trouble is from my damn alternator or something..i still get these power sags at idle. It sucks... cuz my lights dim and everything. sigh.
Your probably right but my Granatelli coded my system all to hell. My O2 sensors would code unable to go lean with it and they coded fine without the granatelli.
Anyway, if you do change out for your stock just for a short while let me know--I noticed the difference right on ignition.
