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Hey Jim What is the best octane for a stock 1600 CC DP (1967)? Should I stay away from octane boosters? Would this help my mileage any or affect the head temp? Jason 68 Notch ---------- Original Message ---------------------------------- From: "Jim Adney" <jadney@vwtype3.org> Reply-to: jadney@vwtype3.org Date: Tue, 31 Jul 2001 16:32:01 -0500 >On 31 Jul 2001, at 13:54, Shirley, James J CDR (CNSP N4341) wrote: > >> Here's what I'm looking at. I replaced my engine with a 1600 longblock >> with hydraulic lifters with an automatic, the engine was rebuilt to >> burn unleaded fuel. I am not sure what that means short of using >> different seats and valves, plus I think they machined the combustion >> chamber shape. > >All OE heads and valve gear have been suitable for non leaded gas >since something like '66; before that the only thing you need to >change was the valves, replacing them with later valves. It is >common in today's marketplace to charge extra for what should be >the norm, but the old valves are still available (and cheaper) and >you don't want them. > >If they machined the combustion chamber to lower the CR, then >this is probably a good thing. > >> The engine runs strong but the idle is rough and at the lower end >> it's sluggish. I've worked through the entire FI system component >> by component and wiring harness. The Muir book was an excellent >> guide. > >Muir isn't bad, but the Bentley is better. For just the FI there were >even better manuals put out by Henry Elfrink, now long out of print. > >> I paid a visit to the wrecking yard yesterday and took a really >> close look at the ECU that was marked with yellow paint 73 T-3. >> Turns out if you turned it just right in the sun you could read >> what was left of the silver (was brown) label. The pn was >> 022-906-021E a 73 T-4. > >Okay, I'm glad you followed up on this and settled this, at least for >the moment. > >I suggest that you divert yourself from the FI innards and think >about the basics. Muir gets some of these wrong for the type 3. >Check your mechanical advance, valve lash, and especially your >engine timing. What year do you have? What do your timing marks >look like? What are you timing it to? Along the FI lines, have you >measured the fuel pressure? It should be 30 psi. > >I seem to recall that this was a 72 which is a bit of a bear to time >because the proceedure is complicated. Muir does NOT cover this >right; Bentley does. > >- >Jim Adney >jadney@vwtype3.org >Madison, WI 53711-3054 >USA > >------------------------------------------------------------------- >Unsubscribe? mailto:type3-request@vwtype3.org, Subject: unsubscribe > >