What do you run (octane)

[Flicktitty]

What octane do you Nico CA18DET owners run?

I might be putting a Ca18DEt in my girlfriends car but she isn't lookin forward to paying 3.50+ a gallon for 93. I was just wondering if anyone runs on 87 or 89 or even if anyone runs on E85. Or if she ran 87 on daily base and if she wants to go play around if she went with 93 if she would be alright.

[EfiniRX7]

Turbo car=93 octane.

[trevr]

Thats what I run, and I pay more than $3.50 a gallon to do it!

[rico05]

What's more, I only run Shell V-Power 93 octane. If you map it for E85, that is the way to go. But until I see more of it around, I am not going to fuss with a new ECU and plumbing.

Cars with adaptive ECUs like SRT-4s or Subarus can get away with 89, but they pull timing and boost to do it. So if you really want, you could buy a programmable ECU of some flavor and map it for lower octane gas, but the trade off will be you will be 10-20% lower power and torque when compared to someone running the same modifications on 93 octane.

Also keep in mind that in Japan, where the original mapping for the ECU was done, they can get much higher octane gas than we can (before anyone jumps me for saying that, I realize their ratings are different than our RON+MON/2 solution), and that the car was designed before the current oil crunch. The CA does have a rich factory map, but I would be installing a knock amp or some sort of knock monitor and keep out of boost for more than 10-15 seconds.

Bascally the answer is yes, she can "run" it. But she would be better off with a I/H/E + cams KA24DE with a 50 squeeze of juice if she has to run the cheap stuff. Owning a turbo toy is not cheap, and looking at it from a "how can I skimp on this" angle will yield a melted pile of parts that used to be a motor.

[Two-Fortee]

Only 1 gas station in Ontario has anything higher than a 91 and thats Sunoco. They have a 94. So this summer I will most likely be running 91 and 94, depending on the prices at the time and what I'm in the mood for. So I'll be somehwere around like 92-93 octane most of the time.

[r34 gtr]

I only run the highest octane I can get my hands on. Usually its Shell V-power or Chevron 93, but if I come across a place that sells race gas, I fill up on that (and reset the ecu). Gas prices be damned!!

[ca18detgabby]

I assume you could tune the car to run 87 octane + a meth or alochol....... but just a guess. then again with meth or alochol you can lean it out on a 93 octane tune..... RIght?

[silviatricks]

Yea I only run sunoco 93 or BP 93 and I run meth on top of that . Regular in japan is between 94-98 octane and hi test is 100 . Ca18det definetly not designed to run on low grade gas.

[r34 gtr]

^ Yeah, except the octane ratings are different. Our 93 is pretty much their 98/100.

[Chris859]

The highest we have around here is 91... and my ca was running just fine on it at 15psi... on my new build (in progress) I am going for 20+psi, but I will be using methanol injection in addition to the 91 octane. Methanol injection is a very viable solution to not wanting to run high octane fuel for mild boost. And I would venture to say that you might be fine with 87 or 89 on stock boost at around 6-8psi.

[MeanGreenS13]

thank god for our local sunoco... I trailored the car down there (STILL NOT RUNNING) last night and filled up on 110 Sunoco Race Gas. 5.95 gallon! WOOT!

[Flicktitty]

thanks guys, Figured i was right and she was just gonna have to suck it up and pay a lil more. Thanks guys.

We got 2 gas stations up here that sell race gas. one is Torco 110 and the other is Sunoco 110.

[new200guy]

98 RON is 93 octane. 100 RON that Shell calls VPOWER here in Germany is about 94-95 octane. There is a thread on running E85 on http://www.sxoc.co.uk. Guy is making about 485hp on it. Stock boost is 10psi on the CA and not 6-8.

[Chris859]

Stock boost might be 10psi with the boost control solenoid hooked up and working properly - but almost every us swap I have seen doesnt have it hooked up - mine was 6-8psi with just the wastegate hooked up and no solenoid, stock downpipe. but none the less...

[rico05]

I have never run a 100% stock CA (or even a CA turbo/wastegate), but considering that :#1: The SR20DET is 7.5 psi stock#2: I have always read that the CA runs 5.5 psi stock, and#3: The CA does not run a compressor bypass valve as standardI don't think that 10psi is entirely accurate. I am running through the FSM, but I am pretty sure that is not correct...Please, prove me wrong. Not trying to bust your balls, but that is just contrary to what I have always heard.

[bentvalves]

Im going to have to disagree with pretty much everyone in this thread. Its your GF, shes not going to be driving the car WOT for more than 3 seconds at a time. If shes going to drive it as a commuter car, and knows it likes better gas, then when 87 is in the tank just make sure she knows not to raz it.

Nissan ECU's from the 80's pull timing as well when theysee knock, dont kid yourself.

for daily duties, 87 octane will be fine.

[Giallo spyder met]

I will run E85 1680cc.