Inline 6 Tripower Question

[motiveauto]

My 1965 C10 has the 230 in it. I have the Offenhauser Triple intake for it and a split header from Langdon Stovebolt.

Has anyone run this setup before?

Did you heat the intake like it is suggested? I hear these things will actually freeze up if not heated.

[HEI451]

The intakes and carbs can run cold, and in some cases, ice up of heat isn't run to them. I would do something different for heat, instead of exhaust heat, and with a header, that will be a chore, I'd run a heat tube that carries hot heater water through it, mounted to the bottom of the log on the manifold.

Before I built the big engine for my V8 Vega, an all aluminum 310 cu/in Rover engine, it had a throttle body 215 Buick all aluminum V8 in it. I started with the throttle body cold, and, in summer, you could watch the ice form on the throttle bodies when the engine was running, in So. Cal., in AUGUST, 100 degree heat. I added a water stove under the throttle body, NO ice, shorter warm up times, better everything.

I'd try to make a pipe (copper) that fits against the bottom of the log, as close to it as possible, with a thin steel around around it to help keep that heat in the log. Water is a lot better heater for intake manifolds, more consistent than exhaust heat, better distribution.

[awbrown]

I have a 261 with the cast iron Fenton header .. I have only dyno run this engine .. when it comes to intake heat ,I would not get very concerned .. I have had this conversation with more than likly the same person you did and all you have to do is look at most high performance manifolds on the market today ... not many of them have a crossover for carb heat .. they run just fine ... now , if you plan on running it in the winter , it is a whole different story .. my first concern would be to unhook the end carbs (it's winter you dont need all that power), but I would run an aircleaner and direct the intake hose of it towards the exhaust manifold , or you will get carb icing on high humidity days when the temp is near freezing , been there done that .....ENGINES LOVE COLD AIR TO MAKE POWER , IN THE SUMMER I WOULD UNHOOK ANY INLET OR INTAKE HEAT .. crossovers or water heated intake and insulate the exhaust from it to ... question , do you have the offy intake ?? with the linkage that hooks all 3 carbs together??? I would try to find 3 smaller carbs , make sure they all the same venturi size .....

[HEI451]

As I said, heating the intake will HELP immensely, something they didn't do back in the dark ages of development in the 1940's and 1950's.

As far as running an engine on a dyno, unless you are developing new cams, other things, then, giant waste of time. You WILL have to revise the timing curves and jetting from the dyno runs, because that ISN'T the real world, nor has anyone ever driven a dyno around the block, and that is truth and FACT. Dynos LOVE excessive timing and extremely rich jetting in comparison to real world operation.

I use a dyno just about every day for some development project or another, great tool, but NEVER to finalize timing/jetting for a street engine, that is left to getting in the vehicle and driving it, then, revising as I go.

[bubba327]

I am using a Offenhauser intake with a single 2 barrel carb with my 230.
I went with the Offy and stock exhaust manifold as Idaho winters are cold but no worse than NY I am sure.
I felt the Clifford intake would not be enough heat in the winter months. True some have hot water jackets but the Offy warms up very quickly in below freezing temps.
I did use a 1" aluminum spacer to adapt to the 4 barrel manifold and to help with the summer heat percolation of the ethanol fuels we are forced to use.
I have no issues at all in a full season of use and over 4500 miles.

[Vernski]

Originally Posted by motiveauto

My 1965 C10 has the 230 in it. I have the Offenhauser Triple intake for it and a split header from Langdon Stovebolt.

Has anyone run this setup before?

Did you heat the intake like it is suggested? I hear these things will actually freeze up if not heated.

Did you talk to Tom Langdon when you bought the intake and header from him? He has the kits to heat the intakes on his site www.stoveboltengineco.com But if you can fab one go that route the heat is important or it wouldn't have been on the stock setup. Ask tom what he would run for carbs I'm sure he will steer you right as he was one of the engineers who helped design the inline engine. I put a Clifford hot water intake on mine with a Edelbrock 1404 and it runs well, but tri-power has the looks and that's retro....Vernski

[motiveauto]

I am planning on making a hot water plate for the bottom of the intake. Im sure most people will not know what it is and what it does on first site which is always a plus.

I only bought the Headers from Tom over at Stovebolt. Hes great and offered some good advice, mainly to avoid using the Triple intake! But he did explain the correct way to build a heat plate for the Offy Manifold.

I know it wont be the best solution, but I am planning on running three Rochester B 1BBLs, the outer two will only open very close to wide open throttle so I think it will work out ok.

Ive got both the intake and header mounted and right now my biggest concern is linkage, the diagram they send you with the intake is terrible... just a bad photo copy of a poorly drawn schematic...Anyone have any pics of their Inline 6 TriPower Setups?

[motiveauto]

By the way is that a PCV Valve/Breather in your pic Vernski? Where can I get one!!!

[Vernski]

Originally Posted by motiveauto

By the way is that a PCV Valve/Breather in your pic Vernski? Where can I get one!!!

Now i'm not real sure at the moment where I bought it's been a few years ago so my guess is either Speedway or Jegs give them a shot. If ya can't find one let me know and I'll look in my files [junk drawer] might have some paper work on it maybe...Vernski

[motiveauto]

Thanks again!

[HEI451]

I sure had a lot of economy, drive ability and performance issues when I used an Offy 4bbl intake on my 1973 Plymouth Duster 225 engine, Things didn't get better until I built a water heater setup for the intake system. IF you can do the heat plate under the carb, good, and, add a set of water tubes connected to the bottom of the plenum and runners, a LOT better. .

[aerotruk63]

Would aluminum tubing not be better than copper. Aluminum conducts better than copper and you won't have dissimilar metals to contend with. $.02 CND worth of advise. I don't run my 250 with a holley 460 enough to see the difference. Winter driving in Montreal, ah no!

[HEI451]

Any good material should work, main thing to do is create a stove to heat the manifold. Be creative, this is wide open to any design, interpretation, etc. I'd suggest making a cover for the tubing, closed off at both ends, so the tubing heat is retained and not leached into the atmosphere.

[Vernski]

Originally Posted by motiveauto

Thanks again!

Here is a link you might find some things there....Vernski

http://www.cliffordperformance.net/M...&Store_Code=CP