Bongo Fury

glad it seems to have done the trick.

Northern Bongolow wrote:glad it seems to have done the trick.

Is there a part number for this diaphragm? It isn't in the pump drawings and after trawling the internet it appears to be an add on for the pump to use the turbo. I can't find a part number anywhere. Seems to be the compensator for the boost pin which gives more fuel depending on the pressure and rotation of the boost pin. My diaphragm (compensator) is actually out of shape a bit and I feel a new one might even make performance better and I wonder if there is a difference in flexibility of the rubber between a new one and old one that has been swimming in oil.

this looks similar

http://www.ebay.co.uk/itm/like/36143155 ... noapp=true

mine was a little wrinckled too but has been fine, thats not to say it couldnt be better though. i would be very interested in any results you get from buying it.------- go on , you know you want too. .

it looks right to me. on the ad link when you open up the details tab more info is listed, in it it says ring the seller if you have any questions.

in the old petrol carb days on bikes and cars new diaphragms were a regular service item and the motor did benefit so ------

Northern Bongolow wrote:mine was a little wrinckled too but has been fine, thats not to say it couldnt be better though. i would be very interested in any results you get from buying it.------- go on , you know you want too. .

it looks right to me. on the ad link when you open up the details tab more info is listed, in it it says ring the seller if you have any questions.

in the old petrol carb days on bikes and cars new diaphragms were a regular service item and the motor did benefit so ------

One on the way

in theory it should sharpen the response so it maybe a good cheap little tweek. keep me posted please.

Northern Bongolow wrote:in theory it should sharpen the response so it maybe a good cheap little tweek. keep me posted please.

Will do

Fassi wrote:

Northern Bongolow wrote:in theory it should sharpen the response so it maybe a good cheap little tweek. keep me posted please.

Will do

Still waiting on the part. Will call today and see what the score is.

how did you get on mate.

Just saw this. I'm in the process of selling the bongo and the diaphragm is still in the drawer. PM me your address and I'll post it to you for heehaw. Please post the results as I was looking forward to seeing the results but just havent had time. cheers

cmm303 wrote:

Northern Bongolow wrote: yes anything like that should be fine, please be aware that most of these are flammable though, inside will be ok, once it starts to move just keep re applying until your happy its free. have you tested the actuator.

Success. The spring is a lot stronger than I expected and I can move the wastegate lever with pliers. Let go and it snaps shut with a thud. Next I tested the actuator with a track pump. Firstly these gauges are notoriously inaccurate so I was happy it was all in the right ball park. The wastegate did most of its opening around 20 psi, with a little more movement up to 30 psi. This is at its most open, is this what you would expect?


and a vid .... Video: Testing Wastegate

Did you get to the bottom of this? Did you get the wastegate actuator moving when reconnected and engine running?

TonyBongo wrote:

cmm303 wrote:

Northern Bongolow wrote: yes anything like that should be fine, please be aware that most of these are flammable though, inside will be ok, once it starts to move just keep re applying until your happy its free. have you tested the actuator.

Success. The spring is a lot stronger than I expected and I can move the wastegate lever with pliers. Let go and it snaps shut with a thud. Next I tested the actuator with a track pump. Firstly these gauges are notoriously inaccurate so I was happy it was all in the right ball park. The wastegate did most of its opening around 20 psi, with a little more movement up to 30 psi. This is at its most open, is this what you would expect?


and a vid .... Video: Testing Wastegate

Did you get to the bottom of this? Did you get the wastegate actuator moving when reconnected and engine running?

TonyBongo, this was a case of No Fault Found and my learning curve. I just didn't realise how strong the spring would be. Because it tested fine when applying pressurised air to the actuator and I had no symptomatic reason to doubt its operation, it did not really feature on my checklist when everything was back up and running. (For reasons, I'm sure will be understood, 34 new coolant hose connections were uppermost in my mind )