supercharging a x300 3.2
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Mmmmm. some good points. But in my experience as a mechanic and a shop owner is lowering CP ratio is a good idea but all the other engine refinements are not really required if you keep within a reasonable boost range. I have done many turbo installments to standard engines that hold together well. A jaguar engine is well designed and built I would be shocked if it could not handle some mild boost.
#7
As well as all of the other issues suggested above, the block of a 3.2L engine doesn't have the bosses machined to bolt on the supercharger mounting bracket. Fitting a complete XJR6 engine, harness, ECU, MAF and in-tank fuel pump assembly and control relay would be a better option. This is especially true if the donor car has a manual transmission.
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About the sc fixing bosses; I would presume the block raw casting is the same across different versions of the engine? so the bosses are in the casting "just" need to be tapped and threaded?
on internals :
3.2 crank is casted, 4.0 and 4.0SC are forged (and the same IIRC)
3.2 and 4.0 cam has the same part number so they should be the same
4.0 and 4.0SC cams are same profile and with different timing (as there is adjustable pulleys this should not be a problem) at least I _think_ this is the case
3,2 and 4,0 valves (at least intake) are with same part number
4.0 SC has different part number but what is the difference that I do not know
4.0 and 4.0 sc have forged rods (again IIRC) 3.2 no clue
on internals :
3.2 crank is casted, 4.0 and 4.0SC are forged (and the same IIRC)
3.2 and 4.0 cam has the same part number so they should be the same
4.0 and 4.0SC cams are same profile and with different timing (as there is adjustable pulleys this should not be a problem) at least I _think_ this is the case
3,2 and 4,0 valves (at least intake) are with same part number
4.0 SC has different part number but what is the difference that I do not know
4.0 and 4.0 sc have forged rods (again IIRC) 3.2 no clue
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someguywithajag (01-11-2022)
#10
Yes, the cast bosses are present on the blocks of naturally aspirated engine. They just aren't machined.
I'm not sure what is meant by the statement about "20% capacity left in the fuelling map". Supercharging a naturally aspirated engine should result in a an airflow increase greater than 20%, so whatever "capacity" is being referring to, would be exhausted.
I'm not sure what is meant by the statement about "20% capacity left in the fuelling map". Supercharging a naturally aspirated engine should result in a an airflow increase greater than 20%, so whatever "capacity" is being referring to, would be exhausted.
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I would imagine that supercharging is to gain additional power but how much more power can this conversion produce, and, considering the costs in terms of time, labour and parts, would all such efforts be worthwhile beyond proving that such a project is doable? Saw some discussions entitled as close to a DB7...(aka the X300 XJR project) in the XJ40 Forum with similar thoughts about supercharging a 3.2 engine.
I would be more tempted to see someone replicating or surpassing Dr Jag's efforts in achieving 430kw power and 700 Nm torque in an XJR. See previous discussion here where Greg Parsons has a great write-up about his Project XJR-6 "from the wrecking yard to the race track".
I would be more tempted to see someone replicating or surpassing Dr Jag's efforts in achieving 430kw power and 700 Nm torque in an XJR. See previous discussion here where Greg Parsons has a great write-up about his Project XJR-6 "from the wrecking yard to the race track".
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Lady Penelope (03-12-2018)
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