[VB] [T2] Hot engine

[c.dreike]

Keeping in mind that I have 15 inch wheels and large tires with a stock xmission, calculated rpm at 65 is around 3600 and is consistent with my 3350 and 3.88 fwy flier.Also i really don't know my hot oil pressure at cruise. The 5-10 psi is idle.Maybe it's just time to bite the bullet, pull the motor and check the cooling system. I would add in the thermo vanes too.ChrisChrisSent from my Verizon, Samsung Galaxy smartphone
-------- Original message --------From: david raistrick <keen at icantclick.org> Date: 12/8/19  7:39 PM  (GMT-08:00) To: Bob <accessys at smart.net> Cc: VW type 2 late aircooled <type2 at type2.com>, "<vintagebus at type2.com>" <vintagebus at type2.com> Subject: Re: [T2] [VB] Hot engine that's a fair point bob - and kind of leans toward my other point:  youmight just be under geared for your power.   a 1776 isn't generallyconsidered a torque monster.  that said, you mentioned 3rd @ 50 @ 3900wasn't helping cool it down, so it's probably still something else.   (forthose that dont recall, a stock big nut bus turns 4000 @ 65, plus or minusa margin from tire variances)On Sun, Dec 8, 2019 at 10:10 PM Bob <accessys at smart.net> wrote:>> a random thought, because it heats on a slight incline and cools going> down, may I suggest getting the bus weighed at a truck stop or other place> able to find out curb weight, over the years I have found weight creeps up> and could be overloading the engine????>> Bob>>>> On Sun, 8 Dec 2019, Chris Dreike wrote:>> > To answer David's questions:> > It is a 1964 split bus> > Rear tires are 205-75-R15, Radius is: 12.5 inches from the center of the> > nut to the ground> > This is a big nut with reduction gears. 3.88 r&p freeway flier.> > RPM at 65mph is approximately 3350, as measured by the fuel injection> > computer.> > Porsche pulley on the alternator to make up for the freeway flier.> > Crank pulley is stock size from Scat with degree markings.> >> > Engine is 1776, 69mm counterbalanced crank and 90.5 jugs> > Exhaust is a vintage speed. heater boxes installed.> > Ignition is full electronic controlled by a Megasquirt ECU> > Fuel injection using mexi-bug stock throttle body and intake manifold> > Oil pump I believe to be stock size> > Full flow oil filter system> > Sorry I don't have exact oil pressure data numbers, however I did check> > that it is high when cold Maybe 60 psi and drops to 5-10 psi when warmed> up> > to running temp.> >> > Cooling is a doghouse with wide fan, stock oil cooler plus a small> external> > cooler from Emp plumbed in after the filter and located under the floor,> > not in the engine compartment.> > Complete tinwork is installed with all rubber seals in good condition.> Most> > likely have a hoover bit installed as I assembled the tinworks.> > The thermostat and vanes are not installed.> >> > I expect that the engine was running hot even when I had a progressive> carb> > on it as it was frying the oil even back then.> > And it has been hot as long as I have been running the fuel injection> and I> > know this because I installed cylinder head temp sensors on 1 & 3 Sensors> > are in rings on the spark plugs.> > The heads get hot running down the freeway as soon as I'm going up a> slight> > incline. they can rapidly rise to 380 and keep on going if I let it> which I> > did once and hit 400.> > The temp quickly drops again when going down even a slight incline to> > around 330 or less.> > Around town the temp is running around 280-300..> >> > The spark plugs are clean as a whistle. No carbon. No melting, just white> > and grey powdery looking stuff> > The valves take minimal adjustment when I check. Sometimes too loose and> > others times just a hair tight. As I have CrMo push rods, I adjust to> .002.> > Engine bullder told me to adjust at zero .> > Down shifting from 4 to 3 while going up hill does not cool things off> > unless I slow way down. As the engine is well balanced, I can run 50 in> 3rd> > about 3900 rpm,> > I filled up with 91 octane on some advice, that made no change.> > At WOT the a/f ratio is about 12.5:1 per my gauge and the advance is at> 28> > degrees. And the head temp just goes up.> >> > Jake Raby indicates that even under load the heads should not be much> > hotter than 340 and if the heads hit 400 that is much too hot and if they> > hit 425, get new heads.> >> > Hope I got it all here.> > Thanks in Advance.> >> > Chris> > 64 DD Kamper Kit> > 71 Sunroof> > _______________________________________________> > type2 mailing list> > type2 at type2.com> > https://www.type2.com/lists/type2/listinfo> >> >>_______________________________________________type2 mailing listtype2 at type2.comhttp://type2.com/cgi-bin/mailman/listinfo/type2