Blayne

Are there many members on here using meth? I just bought a B5 A4 and I was going to do a few minor upgrades and get meth in on the action. My purpose for it is do to our lack of a 93 or better gas in this area. Best we have here is 91. I was going to run a 50/50 blend at about 80% throttle and on. Anyone have a similar set up? Where did you put the nozzle?

Maltesefalkon

Same boat here b5 a4 in central Sk very curious about meth looking forward to hearing what some more seasoned members have to say?

cheeba

Methanol/water injection is only going to yield power gains if you tune for it, or if your ECU is already pulling timing due to knock. If you're running meth/water, you can 'retune' as easily as turning up the boost since you can run higher pre-ignition cylinder pressures (a function of compression ratio and boost) with a boost controller, but higher gains can be realized by increasing the timing as well.

Eurodyne, Unitronic, and APR (I don't know if any other tuners do) all have end-user software programs that allow you to make small adjustments to your ECU tune - timing, boost, fuel trims, etc. Minimum equipment for tuning for meth/water injection is a boost gauge, ECU tune and user software, and a VAG-COM to run logs with. On a turbocharged engine, significant gains can be achieved, e.g., you can usually run a 100-104 octane tune on 91/93 fuel, which can translate to ~20-50wHP depending on the car's starting point.

Blayne

I should have mentioned that I don't want to run it on a stock engine....lol. I had it on my Talon before. The car I bought has a few mods already. This winter I plan on en engine rebuild and adding a few mods to support some future power. The Audi scene iS new to me so I need to do some reading. What is the "power limit" for the stock internals? I also need to know where a good site is to read up on vag com. Been seeing a bunch of stuff about it and I don't know what it is all about. I like the chipped ECU idea though. Any help would be great.

cheeba

What's your engine code? AEB? It's always a crap-shoot, but most of the 1.8T blocks can handle about 300HP before bending rods. The 20mm rods hold a little more power than the 19mm rods. A larger turbo (GT30+) might run a bit more power because of there being less torque spiking due to taking longer to spool. Generally, if you're going any higher than a GT28RS, it's time for rods at the least. What mods do you have, and are planning to do?

If you're doing a rebuild, tossing in a $400 set of rods is a no brainer, since you can easily run 500+HP with them. I recommend Integrated Engineering since they have a great reputation, are actual Engineers, and are very dedicated to producing quality products, i.e., they do actual engineering (FEA, engine dyno, etc.) on the products that they develop.

Check out the link in my signature for a 1.8T build!

Blayne

The car has just a few mods. It has a MBC a boost gauge and an intake. I'm not looking to make 600hp. I would like around 300-350. I want to have a good street car and have a car that I can take to the track once in a blue moon. So far I am thinking fuel pump and FPR if it is needed on these cars. Fuel injectors, chipped ecu, solid IC piping with front mount. Test pipe, 3" exhaust and a wide and O2 and other gauges and meth. Plan to pull the engine this winter to refresh it and build it a bit stronger. Rods and pistons will probably be the only things I put in and a cam if these engines benefit from it. Cheeba....I am not sure on the engine code. Where can that be found? I am curious to see which one it is. What models came with the higher hp?

cheeba

The engine code is three letters stamped on the front, driver's side of your cylinder head. I'm pretty sure that '97 was AEB only, which means you have the coveted large-port cylinder head, with intake ports much larger than all other 1.8T heads (AEB and AGU being the only large ports). All of the early 1.8Ts were the 150HP version.

To get anywhere near 300HP (even 300 crank HP), you'll need a new turbo, which means new downpipe, exhaust manifold, and new intake and charge-air piping. As I tell everyone getting into modding, properly setting up a car to make twice (or more) its original horsepower takes a lot more money/time/effort than you'd initially think. I'm not trying to discourage you; rather, I just want you to be realistically prepared. Also, 1.8Ts run quite hot, so if that track duty includes road racing or hot lapping, you'll need some additional mods in order to retain reliability, e.g., oil cooler, fuel cooler, turbo blanket, various insulation.

Rebuilding the engine is somewhat pointless for a build on the stock turbo; that is, unless you want to rebuild it for fun, or it's dying anyway, or for whatever other reason.

Blayne

Cheeba....thanks for your input. Lapping days arent something I will do regularly. It may be once a summer and just a few laps at a time. I am going to hold off on the rebuild. I am going to do a compression test and if everything looks good, I will sped the money on mods. I will do the basics I did with all my cars. New aluminum rad, intake, ex. mani, downpipe and test pipe, 3" exhaust, fuel pump and injectors and ECU and so on. Lucky for me we have no emissions in Sudbury so I can get away with alot more than others.....lol. I will be doing alot of reading on here to see what works with these and whatnot. Any additional info from members on brands of parts is always welcome. I want to use parts that are proven to work and last!!

cheeba

You also won't need an exhaust mani or fuel pump for the stock turbo - no gains to be had there.

Start a build thread once you get going!

Blayne

I will definately be changing the hair dryer of a turbo that is on it. From what I have been reading, the GT 28RS is a great upgrade. Spools up relatively low and doesn't fall on its *** higher up. May also be a GT30. Not too sure. I had a GT35 on my Talon and it pulled super hard but I hated that it didn't spool till like 4500 RPM.

So when I do go bigger I will do the intake and exhaust mani's. What are some good sources for parts? And what companies have a good selection of parts for these?

I will definitely start a build and paint thread!