Single blade throttle bodies...

[moddedmystic]

To the guys that are running either the Accufab or Billetflow throttle bodies. Will bolting one of those on with out tuning for it lean out the motor at all?
Thanks, Mark

[HELLFYR]

Terminators dunno.

On the 96 it did not lean it out enough to be noticeable.
It did however require one hell of a lot of grinding on the intake to get things
to clear.

[Shadowgray03]

To the guys that are running either the Accufab or Billetflow throttle bodies. Will bolting one of those on with out tuning for it lean out the motor at all?
Thanks, MarkI cant say that I have seen A/F charts before and after JUST a TB but in all honesty, unless your going for the bling or pushing huge power I would spend your money elsewhere. The gians just arent there to warrant one. Many will argue with me that your throttle response is so much better and I wont argue that but thats only because for the accufab unit, the cam geometry differs from the stock TB.

[moddedmystic]

I cant say that I have seen A/F charts before and after JUST a TB but in all honesty, unless your going for the bling or pushing huge power I would spend your money elsewhere. The gians just arent there to warrant one. Many will argue with me that your throttle response is so much better and I wont argue that but thats only because for the accufab unit, the cam geometry differs from the stock TB.
Ya I've heard that about the Accufab. I was thinking about going with Billetflows when and if they release it. I'm just trying to get everything to match (flow numbers) between the JLT 12" , t/b intake, and my stage 4!
Plus I figured when I started sprayin the extra flow would help. I figured somebody would have bolted on an Accufab and noticed if it leaned out a little. I'm guessing it would.
~Mark

[Kafn8td]

I don't think it would make enough of a difference if the car is tuned properly. I'm not sure though. When I went from a 2.93 to a 2.76 on the ported blower my tune adjusted.

[HELLFYR]

Well (again on the 96) the Single Blade Accufab in combination with the AFM powerpipe netted an additional 2# of boost (Vortech-SQ).

Not sure which was the bigger producer, but in combination, that is a big impact to performance.

[Kafn8td]

I went up 2 pounds in boost by putting the stock midpipe back on. I don't think more boost is always a good thing. With LT's I am even making less boost, but I can guarantee more hp/Trq across the curve.

[Shadowgray03]

Boost is a measurement of pressure in the intake of the engine. You can increase boost by reducing flow after the intake or by reducing the resriction in front of the intake. Boost, in and of itself is a very poor tool for measuring performance. What truely matters is tha MASS of air entering the engine. Generally speaking increasing boost by removing inlet restriction = good. Increasing boost by adding exhaust restriction = bad. Both can increase boost but generally only increasing it by uncorking the intake track gives you more power.

Boost generated by causing backpressure generally means the exhaust is "backing up" in the system so to speak which makes more resistance for the blower at any given RPM. More resistance = more heat. More heat = more pressure. Take a bottle of N2O for example. put 10lbs in it and toss it in a freezer and watch the pressure gauge, it will drop yet it still has the same MASS of N2O in it. Pull it from freezer and heat the tank and pressure will rize yet it still has the same MASS of N2O in it.

In the case of N2O of course we want pressure, but for a blower we want lower temps which means denser air which means every revolution of the rotors is working with and compressing more mass of air.

[moddedmystic]

Boost is a measurement of pressure in the intake of the engine. You can increase boost by reducing flow after the intake or by reducing the resriction in front of the intake. Boost, in and of itself is a very poor tool for measuring performance. What truely matters is tha MASS of air entering the engine. Generally speaking increasing boost by removing inlet restriction = good. Increasing boost by adding exhaust restriction = bad. Both can increase boost but generally only increasing it by uncorking the intake track gives you more power.

Boost generated by causing backpressure generally means the exhaust is "backing up" in the system so to speak which makes more resistance for the blower at any given RPM. More resistance = more heat. More heat = more pressure. Take a bottle of N2O for example. put 10lbs in it and toss it in a freezer and watch the pressure gauge, it will drop yet it still has the same MASS of N2O in it. Pull it from freezer and heat the tank and pressure will rize yet it still has the same MASS of N2O in it.

In the case of N2O of course we want pressure, but for a blower we want lower temps which means denser air which means every revolution of the rotors is working with and compressing more mass of air.

Well put. I'm seeing about 15.5 pounds now, maybe with the bigger throttle body I'll gain some there too!
Cheers, Mark

[Grenade]

Well put. I'm seeing about 15.5 pounds now, maybe with the bigger throttle body I'll gain some there too!
Cheers, Mark
With less resriction, wouldn't you lose boost? :confused:

[Shadowgray03]

Less restriction before intake = more boost, less restriction after intake = less boost.

[Warrlac]

My TB shows a slight bit of interference in the closed position. You can adjust it off the rub by turning the adjustment screw.

It doesn't really stick (at least not now). Should I just install it or should I send it into Ontario, CA for repair?

Warren L. :ripped:

[HELLFYR]

Assuming you bought it used...

Lightly grinding the butterfly on the sticking edge until it clears cleanly (little by little). Would only take 15 minutes or so, and save a whole bunch of time and postage.

As long as you work on it out of the vehicle, work slowly and accurately and cleanup all all shavings when done it shouldn't be any big deal to modify it that way.

[Kafn8td]

install it and see if it sticks or idles funny. When you open it with your hand does it stick?