How should i adapt charge pipe to twin throttle body
- Thread starter jrbuckne1
- Start date
I've seen dual throttle bodies used in turbo setups a bunch. DFW speed syndicate (https://www.facebook.com/DFW.SpeedSyndicate) had a mockup with the stock injection so they may have or know of where to get one. I did find one previously but it took a while......
Can someone post up a pic of the plenum without the throttle body.
It is harder to seal an oval with hose clamps than a round tube.
It is harder to seal an oval with hose clamps than a round tube.
Adapt a single hole throttle body to the EFI intake. I used one off a 5.0 HO v8 from the junk yard. So the TPS and IAC should be compatible. The flow into the plenum does not look to be ideal, but that's where boost will compensate. I later made a better adapter plate out of a singe piece of 3/4" thick aluminum to replace the one shown made from two pieces of 3/8" plate.
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jrbuckne1
Well-known member
Thank you, ill check em out
jrbuckne1
Well-known member
This is awesome! Great work! I have a new option to think about
As you consider converting to single vs dual, remember that throttle response off-idle will be more aggressive with the single- by a good bit. The factory duals are progressive linkage also. Much easier to take off gently with the factory 300 TB.This is awesome! Great work! I have a new option to think about
The progessiveness of the TB linkage may not be that much of a concern, after all the mustang didn't have it. If it is an issue, you might be able to make or adapt the secondary lever off the twin throat TB to the Mustang TB.
But don't forget, you're driving a Ford, you'll need all the throttle response you can get! Oops, I'm on the wrong forum for that kinda talk.
Yes to be clear: I'm not discouraging the single. It's 100% driver's preference. Personally I struggle with my wife's truck and other single TB setups, tend to spin out leaving the driveway, then remember to use a feather touch. Prefer the gentler pedal response.
jrbuckne1
Well-known member
I have 3 throttle bodies I've completely rebuild 2(powder coated). Ive done some air flow tests (my job gives me access to good flow meters). I ordered a single 70mm mustang throttle body to test. My Frankenstein tests showed me that while the single can flow volume, the double gave me velocity (I'd have to dig through paperwork to find the numbers). My next test is to mock up a few y pipes with about 12 inches of length going into the twin throttle. My hypothesis is the even split Y pipe will give me better lower turbulent volumetric flow into the factory intake. Boost changes flow dramatically from NA. But im having fun building and testing.
jrbuckne1
Well-known member
So many options and information! Great insight. I love this forum. I have a pnp microsquirt for a fox body loaded with a inline basemap that throws another future set of variable parameters. I also plan to run e85. My lines are all PTFE, RR fuel reg and e85 gm sensor that the microsquirt can be tuned to. About 6 months out from installing so it will run NA (free wheeling turbo) once I finish break in.
jrbuckne1
Well-known member
This is a great point as the 4 speed npt435 in first or 2nd with at least double the hp on a single, while many more fun points, its still going to be used as a daily truck. Thank you for replying.
The single TB may not have more total power. It just allows a lot more air to pass for the same degrees of opening relative to smaller throttle(s).
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