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Old 03-05-2001, 09:18 PM
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I970grancoupe I970grancoupe is offline
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Cool

Does anyone have info. on performance specs for applying a turbo to a B-Block. How does the long stroke react to a turbo? What boost pressure is advisable for the street?
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Old 03-05-2001, 11:11 PM
turbododge turbododge is offline
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I don't think the long stroke would have any significant effect on the turbo, or turboes if you go with twins.

You can comfortably run 8 psi with 8 to1 compression and no intercooler on pump gas. With a good intercooler you can get to 10 psi. This is conservative, and the actual detonation limits would be about 2 psi higher, but it is good to have a bit of cushion to allow for bad gas, air density changes, etc.

We run 14 psi on the street with 8 to 1, intercooled, and EFI, on 92 octane pump gas. We do use water injection that comes on at about 8 psi.
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Old 03-06-2001, 01:14 PM
ChristianCuda ChristianCuda is offline
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Are you talking about the actual B-Motors or the RB-motors. THe b-motors have a very short stroke almost the same as the 273-318-340 motors. 3.31 vs 3.38 (B-motors) The 360 has a stroke of 3.58 and the RB motors are 3.75. Now Since turbododge has been running his twin turbo 340 for quite awhile I don't see a problem with a twin turbo 383 or 400 and I don't see why a 440 would not take a twin turbo properly designed that is. I am planning far in the future to do a twin turbo 451 (400 stroker) or maybe in a 496.

Christian
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Old 03-06-2001, 07:54 PM
Dr. Righteous Dr. Righteous is offline
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Cool Motor Home turbo were common

Back several years ago I had a buddy that worked at a Winnabaggo dealership and he was showing me a optional bolt on single turbo kit for the 440 and 400 powered motor homes. He told me that amount of low end grunt those things added was unbelieveable. You have to think since the application was a motor home the tuning was pretty mild. He offered to sell me a used setup complete for $400. I wasn't interested then, boy can I kick myself now!!

It was a 'regular' looking turbo with a waste gate bypass. I would think it spun up quickly if the boat was nailed off the line and added 5 or 6 PSI and then wasted the rest to keep from knocking. These were usually carberated motor homes with a fat ThermoQuad sitting on them. Nothing special just a bolt on and go kit. It was pretty cool.
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Old 03-17-2001, 04:46 PM
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I970grancoupe I970grancoupe is offline
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Cool clearing things up

yes--a rb engine ---413 to be exact, from a 71 r/v. thanks for the info.
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Old 03-19-2001, 09:27 AM
Rug_Trucker Rug_Trucker is offline
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Research is what you need to do. This is a great place to start. Locating one of those kits would be a start. I think I read that these turbo 440's were also used for stationary applications like running irrigation pumps. Bolt on would be nice! Check amazon.com for book titles.
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