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I have powerhouse pulley upgrade with the Andy bracket and upgraded intercooler pump and I’m very happy with the setup.
The pulley upgrade moves the power and torque curve lower in the Rev range so if feels a lot more responsive but doesn't really increase ether. I believe this is because the MAF can’t handle the ultimate increase in the airflow and so doesn’t give you any benefit at high revs. You need a new stand alone ECU to get the full benefit, but just having the full power earlier is a very good thing.
The Andy bracket advances the timeing by 5 degrees which improves economy and response. Sadly the extra economy is often lost because you find yourself using the extra power a lot more often lol
The other thing I have is a Howard and Scott exhaust manifold which is based on a design by Andy to give maximum benefit, looks very lovely too! It is definitely not cheap and gives the smallest benefit of the upgrades but I don’t begrudge spending money on my hobby…….
I have no problem with extra heat but I do live in England which is a lot colder than Bangkok.
I really would not go with a K&N filter as they will oil up the MAF and throttle body.
as Cafcpete says, it makes the car more peppy low down, so makes it feel stronger and more enjoyable to drive around town.
andy bracket is a nobrainer and easy to install, and the larger chargecooler pump is also a must have, as it keeps the power more consistent on warm days.
As for airfilter, i have used a pipercross oiled filter for many years, and i have yet to see any signs of oil residue in the airbox, maf or piping.
QUOTE the larger chargecooler pump is also a must have, as it keeps the power more consistent on warm days.
Do you have the make and part number for this pump? Thanks
Bosch 0 392 022 010
You need to modify or make a new bracket to hold it in place, since it is larger then the stock one, but thats a pretty simple job if you own an angle grinder and have some spare sheet metal laying around.
As for connecting it, you can solder on the wires as the plugs dont match, but the cleanest way is to buy the Mercedes plug parts that fit the pump and modify the wire connecting to it (please do this)
The parts numbers for the complete Mercedes plug is: 1 x Mercedes A2305400081 2 x Mercedes A0085456326 2 x Mercedes A0005456880
These you can order from your local mercedes dealer.
When installing the pump, i recommend removing the fan pack from the radiator first, as its very easy and gives you a lot more space to work.
I note on your extractor photo you neglected to refit the original spacers to the exhaust studs/bolts.
Why?
Having recently fitted a similar set my understanding is that the spacers give more physical length to the stud/bolt which gives more clamping stretch and allows more tolerance of the expansion contraction process during heat cycles leading to less chance of the bolts coming loose, the better clamping lessening gasket leaks.
I also fitted lock nuts specifically designed for exhaust manifolds and fabricated a new heat shield, the original not fitting.
Very good questions, but sadly I am not sure why.
I left the work to David Marks who is a very respected engineer and technical advisor to the JEC and does a lot of work with the JDHT, in fact it was his garage that turned the Daimler Corsica from a concept car (X300 convertible) into a drivable car, and restored their XJ40 estate. https://www.davidmarksgarages.co.uk/...rcorsica_part1
So I am guessing he didn’t think it needed them. I did ask him to make a heat shield but he told me unless I was racing the car then the air gap was sufficient and I didn’t need one.
Yours looks great
According to Andy Stodart the pump is Bosch A 392 235 022..... which has the same sized hose connections, but is a bigger diameter and uses a different electrical connection.
According to Andy Stodart the pump is Bosch A 392 235 022..... which has the same sized hose connections, but is a bigger diameter and uses a different electrical connection.
Cant find a Bosch pump with that parts number - are you sure its correct?
i know Andy knows his stuff, so i guess that was just a misspelling.
Several people has used the 0 392 022 010, so we know it works, even though the pipes are slightly larger then the stock pump.
One small issue with getting a different one, is now you have to track down the parts number for the connector plug and pins for whatever brand the pump was made for.
I fitted a Bosch 0 392 022 002 (details attached) to my XJR some seven years ago.
It required only minor modifications to the bracket, the inlet/outlet are the correct size and it seems I fitted a Lucas 2 pin connector with the wire bar release of the same design as the MAF connector.
The installation has performed satisfactorily for the past seven years.
Powerhouse Supercharger Pulley
