75 MM Throttle Body for my setup?

NewToFord · May 10, 2010

I may be picking up a used one. Heres my setup
306
X cam
Windsor Jr cast iron heads
24lbs injectors

75 mm a good size?
Thanks

Dino Dino Bambino · May 11, 2010

A 75mm TB will do fine. Anyone who tells you that it's too big should keep in mind that the TB on the new 5.0L Ti-VCT engine is 80mm.

skunk21 · May 11, 2010

Bullitt95 said:
A 75mm TB will do fine. Anyone who tells you that it's too big should keep in mind that the TB on the new 5.0L Ti-VCT engine is 80mm.

+1 for the 75mm

tannerc91gt · May 11, 2010

75mm will be fine. The new 5L is a completely different motor and is making 2x the power from the factory. Bad example IMO but 75 is fine. What intake are you running?

NIKwoaC · May 11, 2010

With EFI, you almost can't go "too big" on the TB. Going reeeeeeeeeeally big on the TB may affect part-throttle drivability, but WOT won't suffer. Some people seem to think that a TB is like a carb and that you don't want to go too big, but that isn't the case. It's a completely different animal. Also consider that going with a TB that is bigger than you need allows room to grow.

The one thing you want to make sure you take care of, is to port-match the intake opening to the TB if the TB is bigger than the intake opening. Use a Dremel with a good grinding wheel and open the mouth of the intake with a nice, flowing taper to match the 75mm TB.

Dino Dino Bambino · May 11, 2010

NikwoaC said:
The one thing you want to make sure you take care of, is to port-match the intake opening to the TB if the TB is bigger than the intake opening. Use a Dremel with a good grinding wheel and open the mouth of the intake with a nice, flowing taper to match the 75mm TB.

Absolutely. That's exactly what I did to my Performer upper intake to match the 75mm bore of my TFS adapter elbow and Summit Racing TB.

Dino Dino Bambino · May 11, 2010

tannerc91gt said:
The new 5L is a completely different motor and is making 2x the power from the factory. Bad example IMO but 75 is fine.

The pushrod 5.0 was choked by the factory. With the right parts, you can make it breathe well enough to almost match the new 5.0L for HP and TQ.

8.8mustang · May 12, 2010

lol there are a bunch of imports with small v6-v8's that come stock with larger then 75mm throttle body's stock
my 1.8l honda cam with a 62 mm stock so you decide

8.8mustang · May 12, 2010

go big

joel5.0 · May 12, 2010

tannerc91gt said:
75mm will be fine. The new 5L is a completely different motor and is making 2x the power from the factory. Bad example IMO but 75 is fine. What intake are you running?

Why is there a tendency to try to relate components selection to engine power production prior to their selection? Aren't the components (including the TB) supposed to be "contributors" to the engine power production among other things? If a 75mm TB for a pushrod 302 is "too big" ........ why does a stock '05 2.4L (146 cid) Honda Accord use a 65mm TB?...... or a stock '95 2.8L (171 cid) Mercedes Benz C280 use a 70mm TB?.... yet they are below the 260HP engine rating. Or are they too, "bad examples"?

tannerc91gt · May 12, 2010

joel5.0 said:
Why is there a tendency to try to relate components selection to engine power production prior to their selection? Aren't the components (including the TB) supposed to be "contributors" to the engine power production among other things? If a 75mm TB for a pushrod 302 is "too big" ........ why does a stock '05 2.4L (146 cid) Honda Accord use a 65mm TB?...... or a stock '95 2.8L (171 cid) Mercedes Benz C280 use a 70mm TB?.... yet they are below the 260HP engine rating. Or are they too, "bad examples"?

tannerc91gt said:
75mm will be fine. The new 5L is a completely different motor and is making 2x the power from the factory. Bad example IMO but 75 is fine. What intake are you running?

looks like i already answered your question. where did i say 75mm was too big? i currently have a 75mm on my car.

Beasty306GT · May 12, 2010

go with a 75mm Accufab throttle body...best one in my opinion no whistle or nothing

Chrome_Rust · May 12, 2010

96-99 SHO's have a 75mm TB and a 80mm MAF. 3.4L V8. Had one.

75 MM Throttle Body for my setup?

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