FC3S Murray's never ending build.

[TitaniumTT]

Fast acting AIT sensor you say? Link perhaps? max operating temp? I need something that I can measure pre-intercooler charge air temps with. Just becuase

Originally Posted by FC3S Murray

BTW...Brian, thanks for the advice on the oil temps and DAMN that was some milage in that short time. You had me all down and out on myself.

Yeah it was, got my Mobil bill yesterday - $461.xx is alot of mileage in a month

[Whizbang]

Originally Posted by Gravity Fed

man i need to start getting some data logging ability on the MS

i have a megasquirt currently but i have yet to figure out the datalogging

[FC3S Murray]

oh I see.

[FC3S Murray]

Originally Posted by TitaniumTT

Fast acting AIT sensor you say? Link perhaps? max operating temp? I need something that I can measure pre-intercooler charge air temps with.

Here you are bro. http://rotarycarclub.com/rotary_foru...=sensor&page=6


This weekend I am currently working on some custom .o25'' ducting that travels from my intercooler-by the oil cooler- to the koyo.

I have been doing it all by hand with some sheet metal snips and some small 3/8 self tapping sheet metal screws. lol

it is coming along just have to put some sealing foam/ soft rubber around the edges that will cause chaffing against the intercooler and radiator cores. Two more brackets to fabricate and then I will test her on tues.
This should take all the air coming through the intercooler and guide it right to the oil cooler and rad. This "should" work great since the radatior shroud I bought years ago and the new improved fan shroud from corksprt have improved air flow. I just NEEDED something to keep the air from dissipating out the bottom of the car after it passes the intercooler

[FC3S Murray]

Well ducting is done. Like I said, kinda ghetto( I hate sub-par shit on my FC) BUT hopefully will be functional. I would have like to do it with rivets and spot welded a couple of the brackets but I work with what I have.

All the screws are secured on the backside with a retaining bead of clear RTV and all the corners are sealed with weather stripping foam. The front and rear of the duct has about 1.5'' of foam so when it is bolted it is very air tight and compressed. Along the sides was a little more difficult. Some small areas for a little air loss BUT NOT MUCH.

I hope my oil cooler line doesn't get too hot on the foam

All in all I am pleased and wil be much happier once I see some temps drop, Lets hope for a high 80* F day tomorrow so I can test compared to last week.

[TitaniumTT]

Nicely done Sean A'int working with that stuff a bitch? I built mine out of .063 5052 AL. I figured it would take me a weekend........ nope, 2 and a few hours every day in between. Pissed me off. Looks awesome and jusding by the one oil cooler line that can be seen, I wouldn't worry too much about it.

[FC3S Murray]

Thanks man for the kind words considering I still think it is ghetto-fabulous. It really was a bitch, most time consuming part was going back and forth taking measurements and constantly re-installing it to ensure proper fitment when a new bracket or hole was to be installed/drilled.

I REALLY wish I would have waited and had Sheet-Metal up here at my work take a gander at it and fabricate something nice. Either way, it would have only been better looking.

[FC3S Murray]

Well after driving around for about an hour and constantly charging the intake to atmospheric pressure and cruising around 3k constant, my oil temps never ran above 165* F.
It would go back to about 178*F sitting and heat soaking but the moment I got above 25mph it would drop pretty fast.

SAME goes for my SWEET new AIT sensor. That SOB would read 45*C after heat soaking and then immediately after driving it would drop to 36*C. After about 2 mins @ 30 mph she was reading 29* C steady and actually went down to 27* C at 50 mph.

Good shit. Now lets see what an 85* F day will do tomoorow temp wise.

[TitaniumTT]

Nicely done man.... funtion > form but if you can make it look good in the process

I need to get some more information on this fast actin AIT sensor, and do some more testing on mine. Like you did, heatsoak the intercooler and then go for a rip down the highway. Also need to get that coolant probe out of the charge pipe, the thing is not giving any useable data whatsoever. I need to find an AIT sensor that can handle 300+F

Are you using any supports on that big ass belly pan? If I ever get around to building mine it'll be out of .063 5052 and I'm a little concerned that it'll move and sing and "bong" at speeds

[FC3S Murray]

Originally Posted by TitaniumTT

Are you using any supports on that big ass belly pan? If I ever get around to building mine it'll be out of .063 5052 and I'm a little concerned that it'll move and sing and "bong" at speeds

You know, I thought about putting an 1''x2''x22'' support out of the left over material across the belly pan but once I bolted all the sides up it really had no play waht so ever. I think the 1.5'' of sealing foam on the front and back act as leverage and cause the belly pan to have a natural concave bend to it. EVEN pushing down on it from the inside takes quite a bit force. It is very fucking snug.

I got up to about 90 mph last night and if my damn FC wasn't so loud maybe I could have heard something. Only way to check is with a wind tunnel I guess.


BTW, I drove the car to work this morning and it was about 56*F ambient and my AIT sensor was reading 18*c most the drive. I had to lean up my 10*C to 30*C Air Intake Temp-to-Injection table because I have never seen those low temps. Even this time last year with my last motor, the lowest reading I would get after some driving was about 24*C and I believe that was on 45* F mornings. SOOO good it makes you wanna slap your mamma!


So Brian... why do you need a AIT sensor that can handle 300* F ??

[FC3S Murray]

Gave her a wash and wax tonight. mnmmmmmmmm smooth

[NoDOHC]

Originally Posted by FC3S Murray

115 psi pulses? Man I was seeing 55 psi and I heard the average(via rotary ressurection) was 30-35 psi for each consecutive pulse. ?hmm

I am not worried until I hit 1500 miles.

Hey, I figured this out! My Compression tester pushes right into the port (no hose). I went to Silver86's the other day and we compression tested his engine, we got 45-50 psi bounces with his gauge (with a long hose). We tried it on my '91 and got 65 psi pulses.

I feel stupid, the difference is the amount of air to compress in the hose going up to the compression gauge. I should have thought of this before.

The '91 gets 110 psi on his gauge (so don't feel at all bad about 55 psi).

Just thought I would clear this up.

[FC3S Murray]

Cool man! Thanks for the clear up. I will have to check with no hose around 2000 miles.

[FC3S Murray]

Well I have 955 miles on her now. Fucking taking forever BUT she is feeling more responsive everyday and I am getting a PERFECT tune done for cruise all the way up to Atmospheric pressure.


I am in Picture Whore Mode. Was a nice evening and the color of the car stands out the best at dusk. Crappy phone pics but better then nothing...








I thought this was a cool shot but wish I could get it in a larger fromat from my cell

[MaczPayne]

Roadtrip time! She's looking good!