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Topic: Tapping explorer intake for ACT (Read 2563 times) previous topic - next topic

Tapping explorer intake for ACT

For those who have done the explorer intake swap, what size drill bit did you use? Also what size tap? I hope to work on my intake this weekend. Thanks for the help...Ray.
87 Tbird LX w/Factory floor shifter:D   3G upgrade. Tinted Windows...85 Mustang GT steering wheel(non-cruise) 17'' Saleen SC style wheels,Front/Rear TC sway bars/poly bushings & Mustang GT steering rack...'05 Mustang V6 springs...93 Cobra MC & booster, MM adjustable C/C plates,  Work  In  Progress.......  ( On The Shelf---HO computer, 19lb injectors, HO cam, BBK headers, Explorer Intake, Cold Air Intake ,Phantom Gauges, Stinger stainless exhaust pipes )
 S O L D

Tapping explorer intake for ACT

Reply #1 –
Act is 3/8 NPT. Drill is 37/64 but may be hard to find. 9/16 will do the trick.

John

Tapping explorer intake for ACT

Reply #2 –
Centerpunch and pilot hole, for real.  Mine's off center a little, and it annoys me whenever I think about it.  Hope you're working with a 96 or 97 lower, the later ones don't have a flat boss where the ACT goes.  Also, while you're drilling and tapping, you should consider opening the coolant port for the EGR cooler, it's there on the Explorer intake, but like the ACT, it's just a flat boss, so you're left with a return fitting on the coolant manifold, but no coolant feed.  I don't recall the drill size, but I'm pretty sure the tap was 1/8 NPT.

Tapping explorer intake for ACT

Reply #3 –
+1 on center punching before drilling. Also drill a smaller pilot hole before drilling the 9/16" final hole.
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.
 

Tapping explorer intake for ACT

Reply #6 –
Ugg, why can't anything be a bolt-in for our cars?! I'm assuming we can use the stock ACT for our cars, correct?

Tapping explorer intake for ACT

Reply #7 –
Yes. You can use the stock ACT. All you're doing on the Explorer intake is making a place to put that sensor. It's really not hard to do. Don't overthink it. I used about four or five drill bits to make the hole. I started with the pilot hole then gradually moved up with the bits. Made it a smoother operation for me. Easy stuff. Use cutting fluid when you are cutting the threads (tapping) in the intake and make sure all of the metal shavings are cleaned out. It's actually like a 5 minute job.
'88 Sport--T-5,MGW shifter,Trick Flow R intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,75mm Accufab t-body,3G,mini starter,Taurus fan,BBK long tube headers,O/R H-Pipe, Flowamaster Super 44's, deep and deeper Cobra R wheels, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

Tapping explorer intake for ACT

Reply #8 –
Thanks for the info - I also found a youtube video that made it seem more manageable.  On the youtube video, they also bored out a coolant hose line towards the back of the lower intake manifold, which connects to the throttle body.  Did you also bore this hole out, or is it not necessary?

Also, overall, how would everyone rate the power/torque gain that you get with the explorer intake?  I have a mild built motor (bored .040, F303 cam).  I've read that with some of the aftermarket intakes you get a loss of low-end torque, and I'd rather not do the swap if that is the same with the explorer intake.

Thanks!

Tapping explorer intake for ACT

Reply #9 –
You won't lose torque. The intake is the bigfest restriction on these motors once you've done a h.o. swap. More so on the lower.
Quote from: jcassity
I honestly dont think you could exceed the cost of a new car buy installing new *stock* parts everywhere in your coug our tbird. Its just plain impossible. You could revamp the entire drivetrain/engine/suspenstion and still come out ahead.
Hooligans! 
1988 Crown Vic wagon. 120K California car. Wifes grocery getter. (junked)
1987 Ford Thunderbird LX. 5.0. s.o., sn-95 t-5 and an f-150 clutch. Driven daily and going strong.
1986 cougar.
lilsammywasapunkrocker@yahoo.com

Tapping explorer intake for ACT

Reply #10 –
Some of the aftermarket intakes give up runner length and plenum volume for max horsepower, the GT40 doesn't.  Even with all that's available, the GT40 is still one of the best "all around" intakes in terms of torque vs RPM.  After all, Horsepower isn't real, it's the result of a calculation (which is why torque and HP are always equal at 5750rpm).

Tapping explorer intake for ACT

Reply #11 –
Quote from: TheFoeYouKnow;459289
  Also, while you're drilling and tapping, you should consider opening the coolant port for the EGR cooler, it's there on the Explorer intake, but like the ACT, it's just a flat boss, so you're left with a return fitting on the coolant manifold, but no coolant feed.  I don't recall the drill size, but I'm pretty sure the tap was 1/8 NPT.


Is that for all explorer intakes, I haven't heard that one before.... Please share.
Mike

Tapping explorer intake for ACT

Reply #12 –
All of them.  On the HO lower, the front nipple for the EGR cooler is in the coolant tubes that run down that side of the intake, but the feed fitting is in the intake toward the rear.  On GT40 intakes, this is not drilled and tapped, but it is there as a flat spot.