Throttle bodies

[Mr. Man]

Am I right in thinking the stock throttle body is 60mm? If not what size is it?:dunno:

Second question.... has anyone tried or is anyone using the Billetflow throttle body? I see they are for sale on that other site(not sure how far the thaw has come between the two sites). They are expensive but they look good and you can have them custom lettered. Just wondering if they work well or if they have given people issues.:)

Thanks ...Eric

[musclemerc]

Stock TB is 57mm. The aftermarket one's have proven to yeild -0- HP and some of them will give you a terrible idle and spring return issues

[MMBLUE]

Am I right in thinking the stock throttle body is 60mm? If not what size is it?:dunno:

Second question.... has anyone tried or is anyone using the Billetflow throttle body? I see they are for sale on that other site(not sure how far the thaw has come between the two sites). They are expensive but they look good and you can have them custom lettered. Just wondering if they work well or if they have given people issues.:)

Thanks ...Eric
Are you refering to motorcity M? Got a link?

[Mr. Man]

Are you refering to motorcity M? Got a link?
Yes to the first ? The link should be www.billetflow.com (http://www.billetflow.com) Look under oval bodies

[Mr. Man]

Stock TB is 57mm. The aftermarket one's have proven to yeild -0- HP and some of them will give you a terrible idle and spring return issues
I've heard this but it's more of a bling thing. Hard thing to swallow is the big price tag for the bling.

Here's another question. Is it feasible to polish or chrome the stock unit w/o compromising performance?

[musclemerc]

It's aluminum so it can be polished. Chroming it will not be a good idea, the opening will be slightly smaller than 57mm

[babbage]

Stock TB is 57mm. The aftermarket one's have proven to yeild -0- HP and some of them will give you a terrible idle and spring return issues

ahem this is false. blackened300 did get a small gain on the dyno.
accufab is the best aftermarket tbody. I picked up a used twin 60 for cheap. evey lil bit helps.

[musclemerc]

What were the gains? Not much I assume. Besides when you get done troubleshooting and re-adjusting the TB it will eventually end up with the for sale stuff anyway.

[boatmangc]

Bigger throttle bodies IMHO really only help when you are moving a lot more air than a stock NA motor can use.

[ImpalaSlayer]

What were the gains? Not much I assume. Besides when you get done troubleshooting and re-adjusting the TB it will eventually end up with the for sale stuff anyway.

there were no gains, it was like 1hp which was probably just variances in dyno pulls. you could make 10 dyno pulls with out changing a thin and come up with 10 different numbers.

i had a accufab and didnt notice anything

[musclemerc]

Dave you are correct. Babbs, I did a search and Blackened gained 1hp for a $300.00 investment. Not worth it in my opinion!

[babbage]

What were the gains? Not much I assume. Besides when you get done troubleshooting and re-adjusting the TB it will eventually end up with the for sale stuff anyway.

there were no gains, it was like 1hp which was probably just variances in dyno pulls. you could make 10 dyno pulls with out changing a thin and come up with 10 different numbers.

i had a accufab and didnt notice anything

It is better than factory.
http://www.rpmoutlet.com%2Fmach1acc.h tm

[musclemerc]

Thats a dead link Babbs... What you trying to post?

[Krytin]

Stock TB is 57mm. The aftermarket one's have proven to yeild -0- HP and some of them will give you a terrible idle and spring return issues
You couldn't be more wrong and I have dyno results to prove it. (they were on display at the Carlisle show0
Not all HP gains should be judged by peak gains alone - I picked up close to 20 RHWP apove 5300 RPM and the curves for both hp & tq were flater and higher across the entire range.

[Mr. Man]

Will the 3mm size difference between the stock unit and the 60mm that billet sells send the MM's computer into a tailspin? I do not have easy access to a tuner, handheld or shop.

[ImpalaSlayer]

Will the 3mm size difference between the stock unit and the 60mm that billet sells send the MM's computer into a tailspin? I do not have easy access to a tuner, handheld or shop.

nope, bolt on and roll

[Krytin]

nope, bolt on and roll

Yep - what he said^^^^!
You just won't realize the full potential w/out a dyno tune.

[DOOM]

I've heard this but it's more of a bling thing. Hard thing to swallow is the big price tag for the bling.

Welcome to my world! ;)

Had my stock throttle body polished. (it was already ported)

[ImpalaSlayer]

Welcome to my world! ;)

Had my stock throttle body polished. (it was already ported)


thats what i would do if you just want bling. have it polished for about half of what an aftermarket TB costs.

[musclemerc]

There has to be more to this story. What did you do to get 20HP on a part that everyone else has reported a 1~3HP gains? :confused:



You couldn't be more wrong and I have dyno results to prove it. (they were on display at the Carlisle show0
Not all HP gains should be judged by peak gains alone - I picked up close to 20 RHWP apove 5300 RPM and the curves for both hp & tq were flater and higher across the entire range.

[babbage]

Thats a dead link Babbs... What you trying to post?



ACCUFAB Billet TWIN 60mm THROTTLE BODY
For The 99-01 4.6L 4V COBRA/BULLETT/ 03-04 MACH 1
If you want to find the true potential of your Mustang 4.6L 4 valve engine you're going to have to feed it some air. The new ACCUFAB Billet pilished aluminum throttle body will completely change the way your car feels and performs. You will not only experience a snappy throttle response and improved air induction but you will also gain 15 to 18 RWHP gain.
ACCUFAB Twin 60mm billet aluminum throttle body is machined to exact tolerance thus making the throttle response ultra smooth from idle to wide open throttle. The linkage mechanism and twin 60mm butterflies are machined from virgin brass providing a precise fit and function. It also has larger than stock sealed bearings for smooth action.

http://www.rpmoutlet.com/images/acc300160.jpg

ACCUFAB Twin 60mm Throttle Body Feature:
4130 High strength Chrome Molly shaft.
Ultra thin throttle plate to maximize air flow.
CNC machined from 6061 billet aluminum.
Stainless steel split shaft for a precise fit and longevity.
Units are designed as a direct-replacement and require no additional modifications.
Includes detailed instructions and all necessary installation hardware. No additional fabrication required!


The factory intake is about 60mm - no gasket I used Black RTV.
I am not saying this is the end all - just that it is a nice piece.

[illwood]

+1 on the ACCUFAB throttle body being a quality part. I did an intake swap on my Mustang and used an ACCUFAB throttle body. It is a real nice part.

[RocsMerc]

Would an oval bore throttle body be worth it on a trilogy, or do you still think the difference would be negligible? Also, how much does the billetflow one cost? I didn't see any prices on the site.

[LANDY]

Would an oval bore throttle body be worth it on a trilogy, or do you still think the difference would be negligible? Also, how much does the billetflow one cost? I didn't see any prices on the site.
i have seen them close to 400 bucks.

[Joe Walsh]

I've had my twin 60mm Accufab on for years and the only problem I had was when it was brand new the blade would stick partly open, resulting in a high idle speed.
I shot the pivot points with syn-lube and she's worked great ever since.
I can't vouch for any HP gains, as I put it on at the same time with a bunch of other mods.

BTW: The twin 60mm bores are a perfect match to the OEM upper intake bore size.

[ImpalaSlayer]

Would an oval bore throttle body be worth it on a trilogy, or do you still think the difference would be negligible? Also, how much does the billetflow one cost? I didn't see any prices on the site.

im not sure but i THINK the trilogy plenum is set up like the cobras with 2 individual bores in which case you cant run an oval TB. when you see one on the cobras, the entire plenum has been swaped. and yes the gains are worth the money when your running high hp.

[ImpalaSlayer]

stock cobra plenum

http://i2.photobucket.com/albums/y47/blaster250cr/IMG_1274.jpg


accufab single blade

http://i2.photobucket.com/albums/y47/blaster250cr/IMG_1094.jpg

[RocsMerc]

im not sure but i THINK the trilogy plenum is set up like the cobras with 2 individual bores in which case you cant run an oval TB. when you see one on the cobras, the entire plenum has been swaped. and yes the gains are worth the money when your running high hp.

This is the Trilogy Plenum.
http://www.mercurymarauder.net/gallery/data/500/medium/PIC_0010.JPG
http://www.mercurymarauder.net/gallery/data/500/medium/PIC_0012.JPG
http://www.mercurymarauder.net/gallery/data/500/medium/PIC_0011.JPG

As you can see it is a single bore. The back cover (not pictured) that redirects the air down into the blower is also a single bore. Does this mean that I would have a worth while gain to buy a oval bore throttle body for almost $400? I actually feel kind of silly bolting the stock dual bore to this.

[ImpalaSlayer]

cool, i always thought they were like the cobras. look on mustang forums as they regularly pop up for sale used. id do it, certainly looks cooler lol

[ImpalaSlayer]

oh yeah we use the same TB as the 03-04 cobra

[Blackened300a]

ahem this is false. blackened300 did get a small gain on the dyno.
accufab is the best aftermarket tbody. I picked up a used twin 60 for cheap. evey lil bit helps.

I installed the Accufab TB and had the car dynoed soon after. I gained 1 rwhp and 0 rwtq peak and I picked up around 5 rwhp across the board.


What were the gains? Not much I assume. Besides when you get done troubleshooting and re-adjusting the TB it will eventually end up with the for sale stuff anyway.

I bolted mine on and drove. I had zero idle issues or problems. The TPS isnt adjustable unless you notch out the holes a little to turn it to get the right voltage. The only think I noticed was the pedal was a lot stiff and felt very strange for the first few miles.


+1 on the ACCUFAB throttle body being a quality part. I did an intake swap on my Mustang and used an ACCUFAB throttle body. It is a real nice part.

It matches my polished upper intake perfectly. I like it on bling alone.


BTW: The twin 60mm bores are a perfect match to the OEM upper intake bore size.

Correct. Its like it should have came from the factory.

[Mr. Man]

So it sounds like if you have the cash burning a hole in your pocket this mod will not hurt anything stock. Whether it's worth the expense is buyers choice. Thanks for the input gang.

[Krytin]

There has to be more to this story. What did you do to get 20HP on a part that everyone else has reported a 1~3HP gains? :confused:
Just what is stated - custom tune on a stock T/B and custom tune w/Accufab T/B. Done by the same tuner on the same machine.

[RacerX]

:D I got my BBK 65mm Twin for $35.00!!! I ported the upper plenum to match the TB perfectly. I now have the NAZ PSRI which is ported. The heads I'm porting right now... I think when you combine all that, it will work hand in hand to give you better performance. With the original install of the twin 65 TB and upper plenum port match, I noticed better response and the wheels did roast easier off the line.

[ctrlraven]

It's the same thing as the PHP Intake Spacer, it may not show up any or very little results when just installed by itself. But if you start adding parts, JLT/K&N intake, intake spacer, headers or some port and polishing it will only help increase the efficiency of another part. That's always what I have seen in my past vehicles.

[magindat]

Stock TB is 57mm. The aftermarket one's have proven to yeild -0- HP and some of them will give you a terrible idle and spring return issues

I haven't had a lick of trouble with my accufab through stock, supercharged suck through and supercharged blow through.

[magindat]

Will the 3mm size difference between the stock unit and the 60mm that billet sells send the MM's computer into a tailspin? I do not have easy access to a tuner, handheld or shop.

The computer gets the air meter reading BEFORE the TB. If the TB pulls more, the computer already knows. Stock is TWIN 57mm and Accufab is TWIN 60mm. The greatest difference you will notice in everyday driving is quick blip throttle response. More air available faster.

Whether or not it's worth $300 is up to you, It was for me.