Dremel will work. However, Dremel brand
sanding drums are for ****, as far as
durability. You would want to use a burr
(an oval or half-oval rotary file) for
the main hog-out. These want a light
pressure, if you go heavy and get hot,
the aluminum just smears into the teeth
instead of chipping off into powder.

Make sure you know where the blade seats,
and stay 1/8" back from there (giving you
1/8" margin-for-oops) so you don't mess up
your idle. If you mark it and over-tape it
that's some added protection against the
casual divot.

Epoxy is for filling/smoothing the PCV
inlet and IAC inlet port area, which is
way bigger and more disruptive than it
needs to be. 1/4" or 5/16" hole is big
enough. Preferences seem to vary on this.
If you're going to put it in, make sure
it's going to stay put. Clean, clean,
clean, and make sure the epoxy is "wetting"
the casting wall perfectly, or else clean
again.

It's not hard, just tedious and with some
risk that depends on your steadiness of hand.
For this reason, it's best to buy yourself
a used TB and do that one, then swap all of
your fittings and mechanicals onto that.
Truck and earlier F-body TBs are all fair
game for newer cars, as long as you plan to
either bypass the TB cooling or cobble the
lines to mate up and adjust the nipples a
bit.

 

I know you've made your mind up,just wanted to chime in.
I have the BBK throttle body.
Dyno tested-1 RWHP-3 RWTQ.Throttle response is better.
It has a 'reducer' plate to bring it down to the intake size.
Not worth the money.
It was free,so I left it on. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

Does anyone know if we are acually using all of the capabilities of the stock 73mm hole?What I mean is the hole will only flow a certain amount as stated above.Do we know if this certain cfm is being reached to a point were it would be worth while to bore the intake hole to match the 80mm tb? Just food for thought <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" />

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by I follow no 1:
<strong>Does anyone know if we are acually using all of the capabilities of the stock 73mm hole?What I mean is the hole will only flow a certain amount as stated above.Do we know if this certain cfm is being reached to a point were it would be worth while to bore the intake hole to match the 80mm tb? Just food for thought <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">We can't bore out the hole in the stock intake. Obviously with the improvements that ported throttle bodies like mine make we need more CFM, and with the stock 75mm hole we can get alot of CFM thru that.

Bret

 

YES BUT ARE WE MAXING OUT THAT CFM?

 

Well I know some stock car racers that use 500cfm 2 barrells to make 425hp, that 500cfm is not rated like our 700cfm, it's much less in that scale. (it's closer to 350-390cfm) They are pushing the boundries of that flow. Now if you drop another carb on that that flows even more they will go up another 50hp easy.

Maxed out? Hmmm I can't think of it like that. If you add more flow and pick up HP does that mean that it was maxed out before? To me it means you needed more flow.

I'm not going around the point, but this is not something you can just say is maxed out, or not. It's not like fuel. Personally I like more flow for a certain engine than most people do. The less restictions you have on the system the better. Can you get XXX amount on rear wheel HP with out a TB, yes, is it much easier to get there with it, yes.

Bret

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by 2001CamaroGuy:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by DevilBird:
<strong>I still think the BBKs are too big in any application, but maybe stroker motors.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I don't get where are these people are running around saying "an 80mm TB is not going to help....it will only hurt because you lower air velocity....". Their mentality is all wrong. They are thinking of what happens when you mount an 850 CFM Holley on a bone stock 289......its going to bog BIG TIME down low. Fuel injection does not have that problem because the fuel supply does not rely on velocity through the TB.

It actually works in reverse. The larger TB makes it easier for the pistions to pull air throught the intake, down the ports, and into the cylinders. An engine is a pump and the less resistance to flow (in and out), the better it will "pump".

To me, it is definately worth the $429. I happened to find a guy who was selling his for about $250 so it was an even better buy but I can say 100% that if I was starting over, I would not be upset at all about paying full price. It really seemed to open up the intake system and made the engine pull much harder at high (3000 and up) RPM. It did not hurt low (3000 and down) RPM, I just could not feel a lot of increase down there (still was some).</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well, I didn't see a benefit at all, and that's cause my car ran like crap with the BBK. Tried everything as far as tuning went, then swapped back the stock ported TB, and everything was fine again. I'm not an isolated case either; lots of people had problems with this TB.

Port the stocker.

<small>[ December 07, 2002, 08:38 PM: Message edited by: ONYXSS ]</small>