Here on the east coast we get 93 and there is no problem with octane. While speaking with my sc installer there was a 100 octane program but we can only get that at the track and the power increase is only 10 horse so it's not cost effective.

 

I think california and the middle east are the only ones without 98Ron/93AKI. As far as I know only Spinner has water/meth.

 

Interesting thread this, I have been doing some research on water meth and the reasons why so many have failed to get results from it on the Audi V8 engines (FI or no FI). I believe I've got some answers but need to put the information together in a logical format before I post. Will try to get it sorted over the next few days

 

throwaway, we only have 91 here in Oregon too. Washington is the same as are some of the inland western states. I recently made the cross-country trek from NJ and noticed by the time I hit Wyoming the octane at the pumps was lower. It's very disappointing, considering I just spoke with Jeremy at Matrix last night about the TTS kit, and he feels the higher boost levels combined with our low-quality, low-octane gas here may not be a good mix. Further research will be done by them....


We do have one station in a local suburb that I have read about that sells ethanol-free 92. Unf I just read about it last night after filling the tank so I have to wait another week to check it out.

 

How much does 100 cost in Oregon? Would it be cost prohibitive to fill the tank with 20% 100 and 80% 91?

 

I think Jeremy told me it's ~$10/gal.... I fill the tank once a week, so it probably wouldn't be the most wise financial decision. Then again, neither is a s/c hahaha

Richard told Jeremy he was going to try to get his hands on some 91 and do some testing.

 

We pay $10 a gallon for 93 oct. so think yourselves lucky. I've spent £120 in 2 days now my car's back on the road. Thats close to $200 Still cheaper than a Hooker and I last longer

 

Thats close to $200 Still cheaper than a Hooker and I last longer

:laughinatabove:

 

100 OCT is definately worth 30+ bhp on my conversion and w/m has always produced good results to.

 

Many people don't realise that a water/methanol mix should be treated as a fuel and so don't lean off the main fuel maps to compensate. You then get a rich mixture and loose power.

 

/\ /\ exactly, just think of it as an octane booster so you'll have to lean things out. I use w/m in my turbo 3000GT with great results. Makes for a great knock suppressor and keeps a cool charge. And more important especially for these cars with direct injection is it'll keep the valves nice and clean. Only thing you have to make sure of is to have fail safes in place if anything fails, there are various ways to do this.
Another thing to keep in mind is to use good quality W/M or mix your own as I do and not use windshield washer fluid which can have other chemicals and vary in percentage of W/M

 

^Unfortunatley, W/M has been shown to not really help the carbon issue on the FSI as much as many had hoped (even with S/C). I believe it was kryponite (who has now sold the car and kit) that ran a PES S/C with meth as well as a catch can and was still showing carbon build up.

Good point about the meth with fuel trims too. The ECU should be able to calculate for some of it, as O2's will show lean with no adjustment. Meth by itself requires more fuel to hold a constant AFR. But additional tuning in a s/c setup is often advised.

Also, just a side note, I've read that some advise to not spray w/m prior to the blower as it's not good for the internals. Just something to think about, unless a port spray kit was developed, which is obviously unlikely.

 

Interestingly APR disueded me from installing a catch can

 

^ Did they offer an explanation?

 

Honestly the only solution for carbon buildup is a catch can AND disabling EGR AND getting valves that are resistant to carbon buildup. Even then, all of the above together would only reduce it. Cam overlap is necessary, and with it comes carbon buildup. Only real solution is the lexus method.

 

EGR delete, plus software to allow the mechanical change would solve carbon build-up 100%, its been documented in the MS3's as they have cobbsport an are able to bypass their breather hose

 

The only thing they said was that it wasn't needed or advised-Soldier runs a PES kit and has a catch can, fromm what I can tell it dosen't effect his car adversely. But I did ask and it was a NO. Maybe Arin from APR can shed some light on this subject?

 

mbgt with the ROTREX kit there is plenty of room after the blower to spray so no prob's with it damaging the unit. Are you in the US or UK?

 

Usa

 

For those who are using water/meth kits -- how large is your reservoir and how often are you refilling it? For a daily driver, would it be terribly cumbersome? As I plan on keeping my car for a long time, I have toyed with getting one after a carbon cleaning -- simply to try to keep the build-up down. I know that there are nay-sayers... but it does seem from good authorities that it may help prevent buildup -- but certainly not clean up caked on crap.

 

DML I too was thinking about this but remember our cars only have the ability to have one program so we would have to run 100 all the time a bit of a pain in the ass and only for a 10 hp at the wheels. Plus a $2-300 for the reprogram.

 

Why is 100 octane neccissary with the w/m kit?

 

I don't believe DML is looking for power gains so there'd be no need for enhanced fuel or a reprogram. Even with both the reason there would be little performance gains on either the M90 PES or the previous TVS1320 APR kits is because they are already pretty much at their limits.

Heat reduction for retaining power under hard and persistent use (i.e. mostly on track) is where a water meth kit can be an advantage on either of these two kits. There are a number of PES clients Aquamist water meth kits specifically for this reason.

DML's target is carbon reduction. As I have explained to him via PM before I viewed his comments on this thread, as far as I am aware no one in the S5 scene has used water methanol to target reducing carbon build up. It would be very much a hit and miss project, a lot of expense using a full 8-port injector system that would have to include precise injection but there'd be no guarantee this is a solution to carbon build up.

DML, when I replied to your PM I'd forgotten there is a guy that started a similar project on a B7 RS4 which you can read up further information on here .... RS246.com Forum :: The World's #1 Audi R, S and RS Enthusiast Website • View topic - My Water Meth Installation thread

In some knowledgeable circles there is a certain amount of belief that when changing out the manifold to add an supercharger you are also removing the flaps and this should reduce the build up. Personally I'm waiting to upgrade the PES kit to the Whipple and see how mine has faired (it was cleaned on the original install) before deciding if to try any way to keep the carbon away rather than just clean it once every 30k miles.

Ultimately water methanol is a far more complicated issues than most appear to appreciate. I'd suggest staying away from it unless you understand all implications of running it.

 

Spinner is 100% accurate with my intentions for the setup. It sounds like it may not be worth the effort. Thank you!