[Blue Max]

I've found a company with lots of experience in porting and polishing TBs. Haven't talked with them yet but thier services page says $75 for TB. I would see why it would be different as ours are nothing special.
Anyone done this yet?

 

[slegos888]

Do they increase the diameter throughout? Do they replace the butterfly with a larger diameter? If they don't it would still neck down to the stock 80mm. I don't know if there would be any benefit unless you increase the whole diameter including a new butterfly

 

[slegos888]

You got me thinking and found this company whose work appears that it would provide the same benefits as the l&m throttle body for a fraction of the cost. Anyone with experience?

 

[Blue Max]

The one company I looked at does offer the larger buttterfly. There are a ton of companies out there that perform this service but being the weekend I can't talk with them.
Hard to believe that no one has done this instead of dropping $400 plus on a new one.

 

[slegos888]

The one company I looked at does offer the larger buttterfly. There are a ton of companies out there that perform this service but being the weekend I can't talk with them.
Hard to believe that no one has done this instead of dropping $400 plus on a new one.

Well since I'm bargin modding ill probably send mine off in a few weeks for $100 it's worth a shot.

 

[Blue Max]

Beta-Tester! Looking forward to review.

 

[slegos888]

Beta-Tester! Looking forward to review.

Seems I'm always the guinea pig:kooky:

 

[randeez11]

If the stock throttle body diameter is 80 mm. That should flow around 900 or so CFM. That is enough air flow to make a whole hell ove a lot of power. A lot more than a NA 5.0 could ever dream of making. So, do you really need to even mess with the throttle body ? Just asking.

 

[Blue Max]

People are spending $400-$600 on aftermarket throttle bodies. The gains, depending on acompaining mods, have range from 8-20hp.
If there is a less expensive method to achieve said performance gains, I'm all for it.

 

[slegos888]

People are spending $400-$600 on aftermarket throttle bodies. The gains, depending on acompaining mods, have range from 8-20hp.
If there is a less expensive method to achieve said performance gains, I'm all for it.

Even more important to me 20ftlbs of torque gain in the middle of the powerband has been common and with my boss intake that is what I'm after and if I pick up a horse or a few and better throttle response I'm all for it. Especially if boring the stocker works as well and saves several hundred dollars. Maxbore.com is the site I found and I already emailed him and sounds very promising.

 

[Blue Max]

That's pretty cool he machines new butterflies. Are you going to tell him any specific size? 84mm, 90mm?

 

[slegos888]

He states on his site he bores all to maximum safe size. I emailed him and he again said max unless he's done one for our cars before I guess it's hard to say but l&m bores to 82mm I'm sure he can get another mm out of it. I don't think the outside dimensions of the stock piece is even 90 so I can't imagine he could go that far. From the pics on his site from other tbs I'd say 3-5mm is attainable .

 

[Blue Max]

Yeah its the outter portion that would be the limit as the butterfly region has quit a bit of metal that can be cut down. Hell, I'm think about sending a manifold with it to port match. Ford engineers said in a release article that the silencer fingers alone are worth 4-5hp. I imagine combining the two port jobs would bring even more. I'll probably pick a used one up for an F150 or stang to send in. I want to talk with Steeda about a tune for it also.

 

[buildingsleeper]

I ported and blended my own throttle body. the metal is so thin you have to be very cautious on how much you remove.the best you can do with the stock throttle body is to remove the small inlet hump before the throttle valve and behind it. the big thing is if you remove too much material you run the risk of stress fractures and cold weakening of the metal.at the most you have 1.2 mm available and that;s pushing it.there is one thing I am curious about. since removing the silencer fingers on the 5.0 helps would it help with the 3.7?

 

[65sohc]

The Maxbore website is pretty interesting, even if he did misspell the word "venturi." I'm anxious to see your results.

 

[Blue Max]

I ported and blended my own throttle body. the metal is so thin you have to be very cautious on how much you remove.the best you can do with the stock throttle body is to remove the small inlet hump before the throttle valve and behind it. the big thing is if you remove too much material you run the risk of stress fractures and cold weakening of the metal.at the most you have 1.2 mm available and that;s pushing it.there is one thing I am curious about. since removing the silencer fingers on the 5.0 helps would it help with the 3.7?

The article I was the introduction of the 5.0 piece that ran in MM&FF. Huge article with engineers perspective on creating the 5.0.
I've got it tucked away safely as you don't get this insight often on a legendary motor.
I would not want to say it should be the same not knowing for sure. But an obstruction is just that, and once removed should offer something of an improvement.

 

[JohnRichard]

You are not going to gain as much as you think boring your throttle body… Maybe 2.5 mm at the most and still be safe on the throttle body housing structural integrity…

And do you really want a mirror like finsh on the inside wall?

Mines looks pretty freakin smooth right now...

 

[buildingsleeper]

You are not going to gain as much as you think boring your throttle body… Maybe 2.5 mm at the most and still be safe on the throttle body housing structural integrity…

And do you really want a mirror like finsh on the inside wall?

Mines looks pretty freakin smooth right now...

when I polished mine i left a satin polish. too smooth and it actually hinders the airflow. you need a bit of texture to have it flow consistantly.

 

[5LITER_MUENSTER]

Just to give you a little example, on LS engines and with the LS3 being the latest, we usually gained about 10-12hp/tq on average with very noticeable throttle response by only porting the inlet side of the TB before the blade. This is via vmax cnc porting. I looked at the accufab and bbk and it look like all they did was enlarge the diameter without even any swirl grooves such as vmax cnc porting. I say try it. If this work then it would be much cheaper then buying accufab or bbk TB. I don't understand why a porting company such as CFM that's on these forums hasn't even tried one yet. It's no brainer if it work. Vmax sell for 250 with core and it's probably one of the most popular and effective mod for the camaros and other LS engines.

Oh and I almost forgot, by the time vmax finish with the porting the edge on the inlet is almost like a sharp knife. Enough material can be removed if done properly.

 

[65sohc]

when I polished mine i left a satin polish. too smooth and it actually hinders the airflow. you need a bit of texture to have it flow consistantly.

How can a smooth, turbulence-free surface hinder airflow? A highly polished surface may hamper fuel/air homogeneity in a wet intake manifold but I can't see how that relates to a dry throttle body.