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I've also been quietly following with great interest. Your work so far looks amazing! I'm also very much for the 'stock' look.
Couple questions to you:
* I guess there's no room to plug the intake plenum back into the original J-boot, right?
* You've been mentioning how you'll have vacuum for a MAP. Will it be possible to run these with an IAT & MAP setup? Would be super convenient, since I've got the Augtronic ECU.
I've also been quietly following with great interest. Your work so far looks amazing! I'm also very much for the 'stock' look.
Couple questions to you:
* I guess there's no room to plug the intake plenum back into the original J-boot, right?
* You've been mentioning how you'll have vacuum for a MAP. Will it be possible to run these with an IAT & MAP setup? Would be super convenient, since I've got the Augtronic ECU.
Cheers & keep up the superb work!
Hi Ish!
Thanks for the compliment.
To answer your first question, the system as designed now won’t work with the factory 944 J-boot and airbox. I contemplated trying to make this work, but doing so would have really compromised the design since the factory J-boot is not placed in an optimal location for this application. An S2 airbox will definitely work since it is tucked under the nose panel and it’s possible that an S airbox could be made to work as well.
To answer your second question, yes you can run this setup with an IAT and MAP sensor. The plenum has a 3/8 NPT port to accommodate the standard GM IAT sensor and the vacuum collector between the throttle bodies has two vacuum ports that can be used for the fuel pressure regulator and damper or a MAP sensor.
Will this use the stock S2 air filter location? Could you run it with individual filters at the trumpets?
It definitely can use the stock S2 air filter location, but the plumbing from the airbox to the plenum inlet will have to be configured by the individual user though. My intent is to end my content at the plenum inlet, since I suspect individuals will require different plumbing arrangements depending on if using an AFM, MAF, standalone EMS with speed density, S2 airbox, open filter, etc.
Open trumpets that can accommodate individual K&N or ITG filters (or even a single, larger ITG sausage-type filter) can be produced, but I don't have a finished design for them at this time. It would certainly be neat, but I wanted to focus on the plenum version first since I'm not running standalone at this time.
@JRP944 I know you speculated on pricing earlier in the thread, but a lot of things seem to have changed since then. Any idea where things stand with the current design?
Did some work this weekend. I picked up the plenum from the welder on Friday and was able to get both manifolds cleaned up and sprayed with clear coat to seal them and protect them. His welding work really is amazing and they turned out exactly how I wanted/envisioned.
I assembled the new TPS as well, which also went together as intended and when installed on the throttle bodies works as designed (shown without the cover installed).
I was able to do some more assembly of the complete system, but ran out of time to finish before installing on the car. I believe I am in a good position to get everything up and running over the 4th of July weekend, which is very exciting! Stay tuned.
@JRP944 I know you speculated on pricing earlier in the thread, but a lot of things seem to have changed since then. Any idea where things stand with the current design?
I've planned manufacturability into the design from the very beginning, and some of the choices I've made have been guided by that $3500 target selling price since there is certainly a point of diminishing returns the fancier it gets. I have a few minor changes to make to further improve the assembly process, but nothing major that changes the basic form or fit at this point.
As such, the $3500 price still stands for the main ITB assembly, but the TPS (if anyone wants it) would have to be extra, probably to the tune of $169 or thereabouts. This is really only intended for those who want to keep stock engine management as it was designed as a perfect fit with the throttles that plugs right into the stock wiring harness with no fuss.
Just thought I’d share how I plumbed the IAC valve to the vacuum collector. The open barb on the tee goes to the brake booster and the elbow pointing downward is for the catch can return to the plenum. For those who don’t run a catch can, this barb could simply be connected to the AOS vent.
And here is what I did to modify the AOS. I actually purchased a second one off eBay a while back to cut down, and it ended up being for an S2, which puts the AOS vent in a nicer location for connecting to the catch can. I may ultimately make an S-bend to bring the oil fill up to a more friendly level and tuck it closer to the firewall, but for now this will work.
Aaaaaaaaaand…..it starts right up, idles and revs. Idle is kinda high right now and I haven’t synchronized the ITBs yet. I just temporarily plumbed a few things so I could twist that key.
More work to do tomorrow before a test drive to make sure this thing actually works. Fingers crossed!
06-21-2024, 09:07 PM
