Tricked-out Chevy six cylinder engines

[T and S]

Just sent my 250 out for rebuild - will have Offenhauser intake, 390 cfm Holley carb, 292 exhaust manifold, cam. Shooting for 9:1 compression. Builder is Baldwin Racing Engines in Friedheim, Mo.

[The Rocknrod]

Originally Posted by 67pete300

Wish I could have this one back for my C10. Built it for my no options 67 Chevelle 300 years ago. Lump port head with split exhaust, HEI and lumpy cam.

Thats a killer set up, I never even knew about lump port heads until the last few years.
https://www.12bolt.com/general-head-information.html

Obviously in one of our trucks but who's is it? EFI?

[jcramsey]

Originally Posted by The Rocknrod

Thats a killer set up, I never even knew about lump port heads until the last few years.
https://www.12bolt.com/general-head-information.html

Obviously in one of our trucks but who's is it? EFI?

I think that’s board member K5 Addiction’s truck. He’ got a build thread called “The Old Duffer”. It is an EFI motor...but was replaced by an LS engine. Really nice truck.

[The Rocknrod]

Originally Posted by jcramsey

I think that’s board member K5 Addiction’s truck. He’ got a build thread called “The Old Duffer”. It is an EFI motor...but was replaced by an LS engine. Really nice truck.

Thanks, I read it just now.

[Agv63]

After going thru this , i am really contemplating on fitting the inline back in my 63.
Running 455 pontiac currently , which is nice but it just doesnt do it fo me, the truck is fighting back. Like it's rejecting the v8 transplant. Giving me many headaches on various things. Anyway, been thinking of going back to inline 6 and stuff the poncho in my chevy eltoro (relabeled holden hq one tonner) last pic.
3 of my cars is powered by chevy inlines , i am a inline type of guy, even did one in my opel senator.
Back in the day general motors south africa relabeled many other gm products and stuffed chevy 4 and 6 cyl inlines into them. Opel, holden and vauxhall, we had some pontiacs here but came with chevy power.

Some pics of some of the stuff i have done or build over the years. Made a intake to run 44 idf carb. Took some time to get fuel curve right but now its the finer tuning. Got some more emulsion tube and jets and explore more. Its on a 230 now th350 and 2.92 rear. Cruising 60kph in town i'm still running on the idle jets in the transition circuit.
With the other 3 pics. Here in south africa gmsa released the 153 with a 36dcd weber and gm cast intake. Came out as the H.O .
I took 2 manifolds, cut and got it welded for dual webers.
In the pic there is 32/36dgv clones. Tried it, but the 250 didnt like it , needs more tuning time., tried 2 x 38dgas webers , responds much better with the 38/38 carbs.

[The Rocknrod]

You know after looking at this thread I might go back and do another one.

[IRQVET]

Originally Posted by The Rocknrod

You know after looking at this thread I might go back and do another one.

I love the rugged simplicity of the inline 6's. So if you build another one, keep us posted . . . Just remember!

[raidmagic]

Originally Posted by The Rocknrod

You know after looking at this thread I might go back and do another one.

Is it an illusion or did you build out the firewall?

[The Rocknrod]

Originally Posted by raidmagic

Is it an illusion or did you build out the firewall?

I's a 48/53 Custom GMC Panel - see in my signature.

[raidmagic]

Originally Posted by The Rocknrod

I's a 48/53 Custom GMC Panel - see in my signature.

Ahh. 10-4 thanks

[shp4man]

OK, not a tricked out motor, but a very dependable, and in some rpm ranges, torquey as hell 250 inch motor. Damn thing loves to climb hills. It's in a '65, but as near as I can tell, it's about a '69 or '70 motor by the casting numbers.
This was in my truck when I got it. When I replaced the valve cover gasket, was amazed by how clean it was inside- no sludge at all. It may be a Jasper motor ( a motor rebuilding company) , don't know, but it uses no oil at all.
I've grown to really like it, especially the sound.
Some day I'll doll it all up.

['68OrangeSunshine]

Yeah, that is some fancy jet-engine type plumbing just to a one-barrel.

[botoepfer]

Originally Posted by '68OrangeSunshine

Yeah, that is some fancy jet-engine type plumbing just to a one-barrel.

,, jet fuel is correct ! its a sleeper ! hahaha !

[Janky59]

I really dig this thread, here is my contribution. A 235 in a '59 Fleetside with 3 on the tree and Borg Warner OD.
There is an HEI distributor on the other side, and I'm working on the manifold heat plumbing now. The new duals were installed a couple weeks ago to hook up the split Williams manifolds.
Pretty low key compared to what some others have done here, I browse among giants! Thanks for your inspiration...

[Janky59]

Maybe this will help out others down the road. I'll post pics and comments as I do the installation of a heat plate from Langdon's Stove Bolt Six on my stock intake manifold.
Langdon's also sells a thermostat housing with two outlets, one for the heater supply and one to route coolant to the heat plate. A comment on this part though, both outlets were tapped for 3/8" pipe fittings, where as the one I took off was tapped for 1/2" pipe fittings. I sourced a reducer (upper LH brass part in pic) to adapt the heater hose fitting to fit the 3/8" port of the new part. I know it would have been best to drill out the 3/8" and re-tap to 1/2" but I didn't want to go down that road.
The brass fitting on the right will go to the heat plate, the returning fluid will go to the brass fitting on the lower LH side of the pic. I will be changing that to a 90° elbow, not the 45° shown, I was just test fitting things so far. I need to get a shorter nipple to bring the tee lower and get a 45° street elbow to get the returning heater hose to attach at a good angle.
So, as I get the parts and make progress I'll add to this thread.

[slepysal]

Bump

[G8rN@te61]

Just about finished with my engine mods. Its a 250 out of a '71 Camaro. Checked the compression and almost perfect so I decided to go ahead and redo it. Painted the engine, polished valve cover, Offenhauser intake, 12bolt split manifolds, polished water pump and thermostat housing, HEI distributor, and 500cfm Edelbrock carb. Waiting on some carb linkage and custom hotrod fuel hose fittings. I need to rig some exhaust pipes on it so I can get to to the shop to complete the exhaust. Have two porter mufflers and intend to do a H pipe. Thinking about bellflower tips out each side. Now I got to figure out how to move the clutch slave cylinder its way too close to an exhaust pipe now.

['68OrangeSunshine]

Originally Posted by G8rN@te61

Just about finished with my engine mods. Its a 250 out of a '71 Camaro. Checked the compression and almost perfect so I decided to go ahead and redo it. Painted the engine, polished valve cover, Offenhauser intake, 12bolt split manifolds, polished water pump and thermostat housing, HEI distributor, and 500cfm Edelbrock carb. Waiting on some carb linkage and custom hotrod fuel hose fittings. I need to rig some exhaust pipes on it so I can get to to the shop to complete the exhaust. Have two porter mufflers and intend to do a H pipe. Thinking about bellflower tips out each side. Now I got to figure out how to move the clutch slave cylinder its way too close to an exhaust pipe now.

I used a combo GM '72 gas pedal and Jen-E throttle cable and did away with the rube goldberg bellcrank-pivot-boomerang linkage. Cable goes around head on Pass side and over valve covers to pick up throttle on EDL1404.

When you do an exhaust crossover, remember the collector of the 1-2-3 pipe on the drivers side is ~6-8'' forward of the collector for the 4-5-6 pipe on the pass side.
My crossover is therefore an "N'' with the cross pipe cutting in at an angle from the drivers side to the pass side. Old circle trackers' trick.

[Palf70Step]

My new/old 250 in my 81. 66-230 head, 78 250 block (30 over), 81 crank, , Offenhauser intake, Edelbrock 1403 (500CFM) carb, 12 Bolt Tom headers, Erson Cam (E160121).

[G8rN@te61]

Bill,

I see you have your carb 180 to the engine. I assume that was for ease of linking the throttle but do you see any performance issue since the carbs are supposed to have the mains facing the engine? That would put the edelbrock letters facing the valve cover.

Yeah I was anticipating having do something with the distance from header to H pipe.
-Nate

[awbrown]

Carb position has nothing to do with how it works or performs .. Holleys , that have side hung and front/rear hung floats care less what way you mount them ,whether on a tunnel ram forward or sideways or single 4 manifold .. The other thing to think about with the heated manifold is from the factory that is how they are set up , the exhaust warms the lower intake area ..Some people say you must have the manifold hot all the time or the vehicle won't run properly .. I ask you then , why would you buy an air gap manifold?? The performance aspect of an air gap manifold comes from it being up away from hot oil and the deletion of the cross over ...as fas as warming up a vehicle using the coolant to warm the manifold is lame at best it warms up the same speed as the engine , exhaust is the proper type of heat to heat the manifold .. On a older V8 the exhaust valve in the right manifold would open as the vehicle got hot thereby not directing as much of the exhaust through the manifold.. I built a 6 and did not use any heat to the manifold and if you do a test with and without I bet you will find more power and gas milage without it ...

[Palf70Step]

Originally Posted by G8rN@te61

Bill,

I see you have your carb 180 to the engine. I assume that was for ease of linking the throttle but do you see any performance issue since the carbs are supposed to have the mains facing the engine? That would put the edelbrock letters facing the valve cover.

Yeah I was anticipating having do something with the distance from header to H pipe.
-Nate

I have noticed no issues yet. I am planning on getting a plate made to rotate it 90 degrees so that I don't have to run the cables over the valve covers. Unlike the Clifford manifolds, the offy's you can't just unscrew and rotate them. I plan on getting Larry @ T6Performance to do my plate, but right now I am just driving it. Even though she isn't in a 60-66, I love it. I forgot where I was posting, so I hope I don't upset anyone by putting my modern square truck in with you great guys.

['68OrangeSunshine]

Originally Posted by Palf70Step

I have notice no issues yet. I am planning on getting a plate made to rotate it 90 degrees so that I don't have to run the cables over the valve covers. Unlike the Clifford manifolds, the offy's you can't just unscrew and rotate them. I plan on getting Larry @ T6Performance to do my plate, but right now it's driving it. Even though she isn't in a 60-66, I love it. I forgot where I was posting, so I hope I don't upset anyone by putting my modern square truck in with you great guys.

Larry@T6 is a good man. He was my I/I adviser when I did my 292 build in '05. Since I'm on it with my '68 Orange C/10 Stepside, I reckon this is more of an L6 thread.
My Edelbrock letters face the Driver's Side. I like it that way. Runs great since 2005.

[Agv63]

Sorry. Dont know why that one turned. It shows correct on my phone. Sometimes the tecnology has a mind which i wil never understand.

Cheers.
Adriaan.

[straight6chevyguy]

Is that a factory grill in the truck?
Or is it after market?