socorob do you know of any other sources for 2.8 performance parts?
"Performance Parts", a little vague. You obviously know that there are very few aftermarket manufacturers creating neat stuff for the Cologne v-6. The problems with some of the items available on Burtons in the UK is that their version of the 2.8 or 2.8i is NOT compatible with the Federal (US) version. So the neat 6 pak (3 two barrel carbs) intake manifold they sell doesnt actually fit on our heads. The other thing to remember is that the UK got the Essex built 3.0 liter v-6 earlier on, and much of there aftermarket stuff is only specific to that engine and doesnt work for the Cologne 2.8.
From what I am seeing on this board you guys are doing just about everything to milk the max out of the 2.8. V6 Jose is also a great asset to this board and anyones search for MORE from the little 2.8. The biggest plus on the 2800 is the head work, get those bigger valves and smooth the passages in the heads, use headers, stick that 2.9 crank in and even old school stroke a little more - with custom pistons you can stroke out to about 3.25 liters. I like to use Svens recommendations on pistons in his book. I know that this book has been labeled as a book written about RACING engines, but the information on Svens choice of custom pistons dimensions and manufacturing is very relevant for the street TODAY - remember that this book was written in 1994 and the information in it is at least 17 years old! So a nice set of forged pistons with lighter pins, better placement of rings and shorter lands and higher compression are a real benefit when trying to lighten the rotating assembly.
Another consideration I would look at seriously is coating pistons. JE pistons, who Sven suggests already has entire lines of pistons that come off the shelf with coatings on the piston skirts to reduce friction. They also offer a thermal barrier for the piston crown to help keep the piston cooler and force more heat out through the exhaust. Likewise, valves get extremely hot, coat the heads of your valves with JE's thermal barrier and reduce the heat transfered into your heads, reduce the heat that destroys your valves and guides, reduce the heat that will be absorbed into your manifold and induction system. Use a plastic spacer between your holly and your Offenhauser and reduce heat transfer into the carb and the fuel.
To maximize my build after my heads are done they will be bench flowed and the numbers from that process will be delivered to a custom cam grinder. Off the shelf cams are ok, but everyones build is different and to get the most out of my build and match my components correctly the cam needs to be ground specifically to my build. I dont want to leave much of anything on the table, short of making the engine unreliable.
Use sythetic oils to lubricate the engine after it has been broken in. There are many small things to do to wring the power out. Sadly, most of them get expensive compared to the power gained. Sythetic oil might gain you 1 hp, coatings on your pistons could net 2-5 hp, the pacer between the carb and intake could bring you 1-2 hp. Stroking to 3.25 liters is going to cost about $2,000 in crank work - is it worth $2k to gain 15% displacement over a 2.8? A custom cam may net another 2-10 hp depending on the build.
Number one in your considerations of all this information should be to ask yourself what this car will be used for? Cruising? Quarter mile drags? Signal to signal racing? Street racing? AutoCross? Number two is how much of this expense can I talk my wife into and how much do I have to hide??????
Rob, if you think you want to stroke let me know, I'll get you the number for Castillo's crank service, think it is in Whittier, La Mirada, La Habra???? They are tops for racing crank work in so cal, they also do some nice work on cranks called knife edging. Mostly used in racing engines.
Hope this helps,
William Ramsey
1974 2800 5 Speed
1973 2600 4 Speed