noticed the lower manifolds were different and the old 800's don't have the vacuum? for the injectors, would need a bit of machining on the zs angled manifold, the straight one should be OK.the lower manifolds are different so you'll need those,
it would need a little circuit building to provide the correct signals to the ecu etc.control of the vis is different so they wont work properly.
Got any pics ? I thought about trying this ages ago but couldn't find the parts needed so it stayed just a thought good work for making it workrover 800 manifold is on, and vis are wired up, working and sending the signals back to the ecu...now has the mid range torque back.
whilst it is a different setup to the platic zs version, the old 800 produced the same amount of torque at the same revs and same amount of power at the same revs, so I am hoping it will not be down on power too much.
Cost... 50 quid for the rover 800 parts and an unexpected 40quid for machining the zs lower inlet pipes to mate up to it. A few quid to build the circuits to convert 4 wire vis to 2 wire vis.
If nothing else, it won't rattle or get ingested by the engine.
When the time comes, I'll get it rolling road'ed, I don't have a 'before' to compare to, but at least it will give an indication of where it is now on power.
About 208? (divided by 0.83). What other mods as that is impressive! ****** goes back ot start of the thread for a re-read*.The car did 173bhp at the wheels (without remap) (whatever that equates to at fly?)
we ran with vis in all conditionssounds good but what about the bottom end torque?
If you are making over 200 bhp on an otherwise standard engine then the 800 plenum is'nt the limiting factor!! The cams are really soft in the 180. What els has been done? Eg manifolds, exhaust, de-cat etc?? Good work though!! Oh how did you wire the vis motors? Got any pics? Cheers.we ran with vis in all conditions
balance open connect closed
balance closed connect open
then overlaid each dyno run.
Interesting thing was, there was 20lb ft difference between the best and worst configuration low/mid range.
power above 5k and below 2.7k was pretty much unaffected by vis position.
Anyway, with the vis configured right, mid range torque is very good, get the 3k and 4.3k surges as thats where the zs ecu operates, although could be bettered if the vis map could be found in the ecu as the r800 really need 2.7k and somewhere else (can't remember) then both closing at 5k - although above 5k is only worth 2bhp at best by closing them.
I think the limiting factor with the manifold for out and out power is its lack of plenum volume.
I may play about with a spare (if I can find one) and see if the volume can be increased, the great thing about an alloy manifold is the ability to chop and weld.