25-01-2021, 09:30 PM
Yeh lots of research to do, but turbo/supercharging the J4R is pretty much the plan simply because it's a "free" base engine/box/loom and ECU set that's sat doing nowt. Also have a Garrett 2256V in the garage that might find it's way on there, but struggling to find a compressor map to see if it's going to be any use, to start off with the plan isn't to get super crazy just aiming for somewhere around 250-300bhp. From what I've read the stock bottom end should be able to handle that with a modicum of reliability, although ideally lowering compression would be worth sorting to "futureproof" the build.
Also weighing up whether a 1.9 crank (believe results in 2044cc) would be a good option as we like torque as well as revs. (and indeed, if we did go for a longer stroke crank, whether the DW10 unit would work since that's also 88mm stroke and we have one to hand. Not sure on journal size though). Another potential to look into is whether an XUD11 crank would even fit since that'd effectively be a 2.2 @ 2137cc.
TBH it'll likely end up with either standard or 88mm crank as they're the easier to procure. Possibly C20LET pistons if some come up at a good price, otherwise standard & will look into the possibility of getting some oil to the underside of them plus either machining the crowns or a thick Cometic MLS gasket (they seem to do them up to 3.5mm compressed). honestly sounds a better option than a decomp plate. Ohh, but then there is someone I could enquire with to see if they have any TE or CTE pistons (heard the latter, from XM/Xantia TCT are said to be weak though?).
Off to look at DW10 crank specs now lol...
Also weighing up whether a 1.9 crank (believe results in 2044cc) would be a good option as we like torque as well as revs. (and indeed, if we did go for a longer stroke crank, whether the DW10 unit would work since that's also 88mm stroke and we have one to hand. Not sure on journal size though). Another potential to look into is whether an XUD11 crank would even fit since that'd effectively be a 2.2 @ 2137cc.
TBH it'll likely end up with either standard or 88mm crank as they're the easier to procure. Possibly C20LET pistons if some come up at a good price, otherwise standard & will look into the possibility of getting some oil to the underside of them plus either machining the crowns or a thick Cometic MLS gasket (they seem to do them up to 3.5mm compressed). honestly sounds a better option than a decomp plate. Ohh, but then there is someone I could enquire with to see if they have any TE or CTE pistons (heard the latter, from XM/Xantia TCT are said to be weak though?).
Off to look at DW10 crank specs now lol...