FC3S Murray's never ending build.

[classicauto]

Good stuff sean!

On the idemitsu pre mix:

Normal ratios for typical TCw-3's are 1oz/gallon. Idemitsu's is 50% less because the "oil is better/designed to operate at that ratio" Thats the summation I got when I asked ID about the reasons behind it.

Its more expensive, but you use less (per gallon) because you need less

[TitaniumTT]

Depends on the type of oil I guess. I was using QuickSilver Premium Plus 2-cycle and the Idemitsu is actually cheaper as well. Best of both worlds. Then again, the QuickSilver is marine, and anything marine is going to be more $$$$


Nicely done Sean. I had the same issue, about 100* hotter in the rear while underload. I added 2% fuel but haven't been back in to check the results.

[project86]

ah... nothing like computer mumbo jumbo late at night. its almost as good as coffee in the morning....

[FC3S Murray]

just wait Kyle.....you will be there soon enough!


Got some tuning done last night and also order one of the FAST ACTING AIT sensors from Dudemannn. Hopefully this new sensor will help in having a more accurate tune. I get a lot of heat saturation when in stop and go and hopefully this keeps things more linear

[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

[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

[FC3S Murray]

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