Boxster intercooler???....

[boostiality]

Originally Posted by pk2

Well, I run 93 by mixing 91 with 100... 4 to 1 ratio. I haven't run it on 91. But at 93 it does fine, no detonation I can detect. The EGT gauge bares that out . At's peek, exhaust gas temps are in the middle of the “hot” safety range.


Regards, PK

Ever considered xylene or toluene? I'm looking at the conversion tables and I think the way they do it is by basic average ratio's. If thats the case, xylene is 117 or there abouts and you can mix 1 gallon of that per 8 gallons of 91 to 1 gallon of that and get an average higher then 4:1 with 100 octane.

It's odd even not under boost, the car runs SO much smoother with a decent octane gas as opposed to our 91 =/

[pk2]

Originally Posted by boostiality

Ever considered xylene or toluene? ...
It's odd even not under boost, the car runs SO much smoother with a decent octane gas as opposed to our 91 =/

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Ya I did some reading about toluene. I haven't even tried to find it. I assumed it was like all good things, banned by the Ca. Air Resources Board . I'd certainly give a try if it's around and it saves a few $. Suposed to be paint thinner of some sort (no?).

Read a couple of hard-core articles on it. One was a bit breathless about how great it was, still rang like good science though. But then another suggested that, in short, it hits a point of diminishing returns despite the octane. Something about the speed of the heat dissipation or something...pretty molecular.

As for shooting for 100 oct., I've run it that way, wasn't hypervigilant but, just by the seat of my pants, I didn't notice a big change. As I understand it, with a stock engine anyway, you buy yourself exactly 0 if you go over the manufacturers recommendation. Obviously forced induction changes all that but by how much I wonder.

Regards, PK

[pinzgo]

Hi Pk, some new pictures for you guys, I started engine with new equipment and runs surprising smooth. But still 6 feet of snow behind door.
I also include picture of buttons of methanol and nitro or probably C02 in ashtray
Take care guys




As for shooting for 100 oct., I've run it that way, wasn't hypervigilant but, just by the seat of my pants, I didn't notice a big change. As I understand it, with a stock engine anyway, you buy yourself exactly 0 if you go over the manufacturers recommendation. Obviously forced induction changes all that but by how much I wonder.

Regards, PK[/QUOTE]

[pk2]

Wow, it ran ok with no hose clamps on your intercooler? Min feels like 3 cylinders if everythings not cinched tight.

What are you using as a controler for your meth?

Regardds, PK

[pk2]

So, I found a source for toluene, $16 per gallon. Any body have an equation or chart showing ratios of toulen to 91 gas to figure a target oct. number?

Regards, P

[pinzgo]

Hi Pk, I removed everything to clean trunk. That's why clamps are not on pictures. Methanol is AEM. It comes with progressive control based on boost pressure. Is is set from 2 to 7 psi. I can set from 0 to almost anything over. I will have to road test now.
Bests
Jacques

Originally Posted by pk2

So, I found a source for toluene, $16 per gallon. Any body have an equation or chart showing ratios of toulen to 91 gas to figure a target oct. number?

Regards, P

[pk2]

Hello Guys,

I tried my first run with a toulen/91 oct blend. Did it with a half gallon toulene with 8 gals. 91. Bout the same price ratio I spend for my race fuel mix.

Can't say I noticed any dramatic change and have no idea what oct. I wound up with but I pushed it pretty hard and the egt's were about the same, no detonation.

Still got to rig up a pressure relief for my H2o/meth injection set up and I'd love to figure out a safety shut down system that works with my super. ...Ideas?

Regards, PK

I've been hereing more and more about AEM. Be interested to see how it goes.

[boostiality]

Originally Posted by pk2

So, I found a source for toluene, $16 per gallon. Any body have an equation or chart showing ratios of toulen to 91 gas to figure a target oct. number?

Regards, P

P

It's probably similar to the 91 to 100 octane chart. All they do is average out the number ratio. Unfortunately xylene and toluene have gone way up, they used to be 35-40 for a 5 gallon drum, but not anymore. The mixture I made is with 4 gallons of 100 and 1 gallon of xylene. Cost for me is $43.00 and the mixture adds up to 103.4xx octane. VP racing MS 109 is 103 octane but they charge $64.00 for a 5 gallon drum. If you look at the main ingredients you'll see ......... you guessed it Xylene


I'd love to use leaded gas like C16 but cats and o2 sensors are way too expensive on these cars.

[pk2]

Originally Posted by boostiality

P

It's probably similar to the 91 to 100 octane chart. All they do is average out the number ratio. ...The mixture I made is with 4 gallons of 100 and 1 gallon of xylene. Cost for me is $43.00 ... MS 109 is 103 octane but they charge $64.00 for a 5 gallon drum. If you look at the main ingredients you'll see ......... you guessed it Xylene


I'd love to use leaded gas like C16 but cats and o2 sensors are way too expensive on these cars.

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Ya it is just a ratio thing the equation is just ratio based on know outcomes of mixes ...I'll figure it out. I pay $8+ a gallon for 100. to get the minimum 93...If Toluene is double the price and at least double the strength, it's a bit more convenient. A little mental Calisthenics make me believe it might be a push, does sound though like you saved a few bucks

I read a couple really in depth articles on these additives, wish I could dig up the links. Theres lots of nuance. Toluene seems the pretty good because theres a lot in regular fuel anyways and, for what it's worth, the EU uses more than we do. So I guess it's pretty safe for their engines

Regards, PK

Found one http://www.offroaders.com/tech/octane.htm