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-   -   Sequential Turbo AI Install (https://www.rx7club.com/auxiliary-injection-173/sequential-turbo-ai-install-853770/)

HDP 08-01-09 08:12 AM


Originally Posted by Dudemaaanownsanrx7 (Post 9395208)
Do you have a fast reacting air temp sensor installed to keep a better eye on air temps?

No, but I had thought about getting the one discussed on Chuck's site. Haven't had time to read up on them, so I'm not sure what modifications need to be made before hand.

Dudemaaanownsanrx7 08-01-09 10:35 AM

Yeah there is a long thread in the 3rd gen section. I've been getting them for people on the forum, and a few people on chucks tuning group, i can get you one too along with the bosch connector. It's just a matter of putting a bosch connector in place of the stock one and swapping the sensor out. The threads and resistance is exactly the same as stock. The fast sensor works especially well with aux injection systems. Drop me a pm if you think you might want one.

sk8world 08-01-09 02:11 PM

looking good Don.. Here I was just thinking you were sitting at home doing nothing!! :lol:

HDP 08-01-09 11:26 PM

Thanks. Might not be racing, but I'm always doing something. Just doing everything in stages and as time will allow. :noyes:

SPICcnmGT 08-03-09 02:14 PM


Originally Posted by HDP (Post 9395039)
Thanks Chris. Have you taken your car back to the dyno? What is your peak boost? Did you tune for the AI or just added for a safety margin?

I haven't been back yet, I'm still tuning. First my inj. lag got screwed up for some reason, so I tuned with it like that, then I set it back to normal. So this weekend I decided since I was in the middle of tuning I'd set it negative to lean out the idle some and smooth some of the part throttle that it wouldn't let me lean out because of the 850s. I found out it's not just an idle problem but the top 2-3 rows of the map when around 3k rpms it won't go below 10-11% inj. duty no mater what. So I'm assuming the whole map has a setting that if you are on the throttle at all it won't go below a certain point.

It peaks around 1.42(datalogit)or so, which seems to be about 20-21psi, but my gauge only goes to 20. It's holding between 1.35 and 1.40, falls off some after 7500, but not alot.

And right now I'm tuning with it, I had planned to put just water in and tune with that, and run the meth for safety, but it's making it rich enough to want to break up sometimes. I plan to back and tune for 15psi and under with just straight 93.

HDP 08-05-09 10:14 PM

I hope to complete mine this weekend... if the weather is good (don't have a garage). Just need to fab another piece, wire up the solenoids and hook up the lines.

sen2two 08-08-09 03:40 AM

I used the rear mount washer fliud tank also (but from an FC). whats the purpose of removing the motor and tapping a new hole? I just put the hose over the nipple on the tank where the motor would normally push it out. works nicely...

just curious of your reasoning?

HDP 08-08-09 10:17 AM


Originally Posted by sen2two (Post 9412150)
I used the rear mount washer fliud tank also (but from an FC). whats the purpose of removing the motor and tapping a new hole? I just put the hose over the nipple on the tank where the motor would normally push it out. works nicely...

just curious of your reasoning?


Because the rear tank uses gravity to drain into the secondary tank I made which requires the lowest level to work effectively and the washer motor was about 2" above the lowest level.

RCCAZ 1 08-08-09 10:31 AM

Nice thread. Not a lot of AI install pics out there. Patiently waiting for more pics of the final install ;)

HDP 08-08-09 11:01 AM

Thanks. Hope to take additional pics and finish it up today.

RCCAZ 1 08-08-09 02:48 PM

Did I miss the location for your low level tank sensor? Will that be mounted somewhere in the PVC tank??

sen2two 08-08-09 04:18 PM

[QUOTE=HDP;9412416]Because the rear tank uses gravity to drain into the secondary tank I made which requires the lowest level to work effectively and the washer motor was about 2" above the lowest level.[/QUOTE

oh, ok... the nipple on my FC tank is at the bottom. and im only running one right now. I had bought some PVC tubing like your self to make an additional tank. very similar to yours. but never did it. Maybe when i get annoyed by filling the tank so much i'll add it in...lol

HDP 08-09-09 10:03 AM


Originally Posted by RCCAZ 1 (Post 9412818)
Did I miss the location for your low level tank sensor? Will that be mounted somewhere in the PVC tank??

I didn't add a low level sensor. I hope to keep a close enough check on the system when in use that I would not need to add one. It will not be a full time system. Controlled with a dash switch, it will only be used when needed, i.e. for drag racing, track days and an occasional burst to cool the intake charge.

RCCAZ 1 08-09-09 10:10 AM


Originally Posted by HDP (Post 9413961)
I didn't add a low level sensor. I hope to keep a close enough check on the system when in use that I would not need to add one. It will not be a full time system. Controlled with a dash switch, it will only be used when needed, i.e. for drag racing, track days and an occasional burst to cool the intake charge.

Cool. I may borrow your idea and model mine after yours if I can find someone to swap me their touring rear panel and tank for my R1 panel. Great job BTW. I really like the idea of no tank being visible in the rear. Very clean install. Getting close to final pics yet?

HDP 08-09-09 10:14 AM


Originally Posted by sen2two (Post 9412969)

oh, ok... the nipple on my FC tank is at the bottom. and im only running one right now. I had bought some PVC tubing like your self to make an additional tank. very similar to yours. but never did it. Maybe when i get annoyed by filling the tank so much i'll add it in...lol


Well my tank is ABS, which is more durable and chemical resistant than PVC.

HDP 08-09-09 10:20 AM


Originally Posted by RCCAZ 1 (Post 9413975)
Cool. I may borrow your idea and model mine after yours if I can find someone to swap me their touring rear panel and tank for my R1 panel. Great job BTW. I really like the idea of no tank being visible in the rear. Very clean install. Getting close to final pics yet?

I think all the rear panels are the same. I have an R1 and there was a small cap I had to remove to allow for the neck of the tank.

Hope to finish the install today and upload the rest of the pics tonight or tomorrow.

HDP 08-09-09 10:15 PM

Unfortunately, I was unable to complete the install this weekend because I ran into an issue or two. For some reason, I'm not getting any flow beyond the check valve. Didn't have this problem 2 weeks ago when I tested it and checked for leaks. And also, I can't seem to get the pump pressure to increase. No instructions came on how to make pressure adjustments. I will start searching...

HDP 08-10-09 02:14 PM

Problems solved. Hope to finish it... sometime soon. :dunno: This past weekend was my best opportunity to complete it. I guess I will have to finish up whenever I can.

MaD^94Rx7 01-14-10 08:33 AM

Hey any news? I'm interested in knowing if you finished it and how it works....
Pics would be a bonus...

Dudemaaanownsanrx7 01-23-10 05:48 PM

curious as well, hows this coming?

HDP 02-05-10 09:22 AM

Sorry guys, I've been tied up in my home construction/remodel projects, I haven't had much time for the 7, but mostly because it's winter time. I did get the system working and it seemed to be working well, but I broke the stock differential first time out at the dragstrip with the AI. Before AI I managed a 8.3x 1/8 mile, with AI 7.9x one pass before the diff broke in half. I still need to get one of those fast reacting IAT sensors from Dudemaaan. Once I get the car back from body and paint, I plan to make a few changes with the tank setup and will get some good pics of everything.

Double_J 02-13-10 07:15 AM


Originally Posted by HDP (Post 9381177)
Wiring the relays for the pump and solenoids was all I was able to complete before I ran out of time for Zoom Fest at Road Atlanta. I should be able to complete the install and test it out by next weekend. I'll take additional pics of the finished install.

Can you explain this for a newb? I have a simple kit in the elbow and want to move it pre turbo ( sequential ). I can not wrap my head around how to get it to flow to each intake pipe. :scratch:

Dudemaaanownsanrx7 02-13-10 11:50 AM

Double_J he's running dual nozzles, one in each pipe. Another alternative is to run some kind of air box, and mount a single nozzle in-between the 2 air inlets. This cuts down on complexity and allows the secondary to only suck water in when it's online, without adding rpm switches.

HDP sounds like the AI is working well. Pulling 4 tenths off is no easy task. You should be in the high 11's now for 1/4 mile. Did you already fix the differential? What did or are you planning to go with? I know all about breaking the differential... Were you having wheel hop when it broke?

Monkman33 02-13-10 12:26 PM

What about the fact that the secondary turbo doesn't spool at the same time as the primary? or are you running them in lag... er... um... non-sequential mode? ;-) Would this difference in spool time mean that you are feeding way too much injectant into the secondary turbo at time?

Speed of light 02-13-10 08:55 PM


Originally Posted by Monkman33 (Post 9802604)
What about the fact that the secondary turbo doesn't spool at the same time as the primary? or are you running them in lag... er... um... non-sequential mode? ;-) Would this difference in spool time mean that you are feeding way too much injectant into the secondary turbo at time?

Possibly.... I was thinking about putting a solenoid on the secondary nozzle and driven from the ECU output that triggers the TCA transition.


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