My bus is nearing completion and I'm going to need a motor when it gets back from the paint shop. I've been collecting parts for a planned stock 1776cc to give me some extra torque, and was looking for advice on this combination.
Crank - Stock 69mm polished
Rods - stock
Cam - Engle 100
Pistons/cylinders - Mahle 90.5mm
Heads - New stock heads
Carbs - 36mm Dellorto DRLAs
Distributer -Bosch 009
Extractor exhaust
CB performance maxi flow in/out oil pump.
My concerns are
I am worried about the heat this will produce.
Should I get the heads polished?
Do I need to improve the valvetrain? eg. bolt up rocker shafts HD springs etc.
Many people say you gotta have a CW crank, will my stock cranks stand up to this?
Your comments are appreciated
Cheers
Ben
My First 1776...
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500LbGorilla
Ben,
Any money you spend on the heads is money well spent. I'd suggest a mild port job. Check with Darren at DRDRacingHeads.com for Level 3 heads for that setup. They'll really wake it up, and you can keep all the stock sized pipes and your heater boxes.
Solid rocker shafts are a good idea with that setup.
Don't do the easy way out on the oil filtration. Go with real full flow.
Your stock crank will be fine. If you want it to be smooth and last, get your setup dynamically balanced.
Any money you spend on the heads is money well spent. I'd suggest a mild port job. Check with Darren at DRDRacingHeads.com for Level 3 heads for that setup. They'll really wake it up, and you can keep all the stock sized pipes and your heater boxes.
Solid rocker shafts are a good idea with that setup.
Don't do the easy way out on the oil filtration. Go with real full flow.
Your stock crank will be fine. If you want it to be smooth and last, get your setup dynamically balanced.
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CHAZAVW
- Posts: 2163
- Joined: Fri Nov 15, 2002 12:01 am
i am not a bus guy.....
but if you are considering upgrading the crank to a c/w choromoly one....
cb sells the 76mm crank for the same price as the 69mm chromoly crank....
http://www.cbperformance.com/catalog.asp?ProductID=1185
i talked with someone on the samba and that was putting together an engine for his bus and he ended up going with a 76mm by 88 thick wall cylinders.....
the 76mm crank would give a little more torque and thick wall 88's were very durable to heat.....
good luck!
but if you are considering upgrading the crank to a c/w choromoly one....
cb sells the 76mm crank for the same price as the 69mm chromoly crank....
http://www.cbperformance.com/catalog.asp?ProductID=1185
i talked with someone on the samba and that was putting together an engine for his bus and he ended up going with a 76mm by 88 thick wall cylinders.....
the 76mm crank would give a little more torque and thick wall 88's were very durable to heat.....
good luck!
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500LbGorilla
That's what my bus engine has - 76x88. It's a great running engine.. and took a hell of a lot of abuse on my recent 1200 mile trip loaded down heavy as hell. Ran on 14-15:1 AFR and did not overheat after I got the floats right. It ran warm, no doubt, but not overly so.
If I had it to do again, I'd do the same, or a 74x88. 76 is a bastard size in that you have to either shim for non-stroker pistons, cut barrels for stroker pistons, or run longer rods for stroker pistons to get deck where you want it. I went with non-stroker (only 88's I know of anymore) and around a 0.140" set of shims, I think it was. Webcam 119 and dual 36 IDF carbs. Stock sized valves on L3 heads made it easy to keep my heater and good torque. Mileage is awesome.
If I had it to do again, I'd do the same, or a 74x88. 76 is a bastard size in that you have to either shim for non-stroker pistons, cut barrels for stroker pistons, or run longer rods for stroker pistons to get deck where you want it. I went with non-stroker (only 88's I know of anymore) and around a 0.140" set of shims, I think it was. Webcam 119 and dual 36 IDF carbs. Stock sized valves on L3 heads made it easy to keep my heater and good torque. Mileage is awesome.
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Guest
Yeah, I always had misgivings about the pump, I think true full flow sounds sensible since the case is already apart!
I already have the Barrels and pistons and my budget is not going to stretch to CW cranks so unless everyone screams at me that this engine is going to blow up I'll stick with what I've got.
My other concern is that I currently have only 4 dowelled crank and flywheel. Would this be catastrophic on this engine?
I already have the Barrels and pistons and my budget is not going to stretch to CW cranks so unless everyone screams at me that this engine is going to blow up I'll stick with what I've got.
My other concern is that I currently have only 4 dowelled crank and flywheel. Would this be catastrophic on this engine?
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500LbGorilla