I think I have made a fair bit of progress now, please check out these photos and see what you think. thanks to everyone that has helped with advice so far, and bmcecosse for the crankshaft.
I think I am nearly sorted, I need a clutch setup, a pressure release valve of some kind, and a few hoses/jubilee clips etc then its time to bolt it together and see what happens
Also the radiator has the drain plug missing and I cant remember what car it is from
Picky
The engine is now running!! thanks to all MMOC members who have helped with advice and parts.
Last edited by picky on Sun Sep 09, 2007 2:09 pm, edited 6 times in total.
1969 Four door Saloon Old English White 1275 with ported head and HS4 carb. Wolseley 1500 front brakes. Currently off the road with a leaky master cylinder!
Excellent - good progress. The new bottom pulley looks great - did you do all that work yourself? I'm not so sure about running the throttle so far away from the carb - and upstream of it! It's not designed to work that way and there could be problems. Have you any experience of others running a set-up like that ? I'm sure GAS's installation is a suck-through carb - not blow through like this. Be careful when fitting the centre main strap - you need to 'pinch' the cap very slightly but not too much or it may crack!
I designed everything myself, and had the brackets cut out on a plasma cutter at work, and the pulley ( also designed myself) I had made by a skilled lathe person. I have thought carefully about the carb/throttle, Gas's installation (the vmaxscart kit) does have a suck through carb, but as I am using an intercooler (which Gas's version of the kit does not have) I have to have a blow through carb. That would mean having the throttle downstream of the supercharger and I would need a very large blow off valve and the engine would run very erratically as the supercharger would be trying to force air into the engine all the time, when actually we only want it to do this at full throttle. I have put the throttle at the mouth of the supercharger to give a smooth transition between vacumm and boost. I have seen several bike carbs that have the throttle at the front of the carb, so I assume that this setup will work, albeit with a little fine tuning to get it going, as the SU carb is "expecting" to have the throttle downstream instead of upstream. Having the throttle further from the carb may reduce the throttle response, but with the supercharger (which will make the engine have faster throttle response) I dont think this is an issue. But I wont know until I put it all together and turn the key
1969 Four door Saloon Old English White 1275 with ported head and HS4 carb. Wolseley 1500 front brakes. Currently off the road with a leaky master cylinder!
I have kept all the CAD drawings of the brackets, and I have a diagram of the pulley also. I am thinking of selling a VERY basic kit of these parts on ebay, but a PM in the right direction might work wonders most engineering firms can work from the CAD drawings that I have, but as I work at an engineering firm I could easily make several sets.
1969 Four door Saloon Old English White 1275 with ported head and HS4 carb. Wolseley 1500 front brakes. Currently off the road with a leaky master cylinder!
I think I am nearly sorted, I need a clutch setup, a pressure release valve of some kind, and a few hoses/jubilee clips etc then its time to bolt it together and see what happens
Also the radiator has the drain plug missing and I cant remember what car it is from
1969 Four door Saloon Old English White 1275 with ported head and HS4 carb. Wolseley 1500 front brakes. Currently off the road with a leaky master cylinder!
looks fantastic, nice to see another forced induction moggie!
2 points I would like to bring up, is the HIF-44 a turbo spec carb? or have you used a standard metro / ital part?
you need to have a proper turbo spec carb as the spindles and other areas are sealed to preven boost and fuel being leaked out of carb. Shame you cannot use a suck through system as it makes things easier with the carb
Have you though about how to control the fuel pressure, as you will need to have fuel presure that varies in relationship to the boost.... ie if your fuel pressure is 4psi and 5 psi of boost you will push the petrol back to the pump at 1psi!
The hif is not a turbo item, but I have sealed all places where boost may escape. I am not fully decided on the fuel pressure, there is a tube leading from the float chamber that would usually vent to the atmosphere, I am thinking of attaching a pipe to this and the other end connected to the supercharger outlet, bypassing the intercooler. So the fuel pressure in the carb will always be slightly higher than the boost pressure, and the fuel pressure will vary with boost. I will need a high pressure fuel pump also.
At the end of the day I will just have to start it up and see what happens
Picky
1969 Four door Saloon Old English White 1275 with ported head and HS4 carb. Wolseley 1500 front brakes. Currently off the road with a leaky master cylinder!
going on my testing you will prob need to swap for a proper turbo carb, as things like a solid float are important as the normal plastic or metal one will deform under boost, you probably find that she leans out badly under boost if you dont use a sealed carb
I would have a search for a metro turbo carb and a boost controled fuel presure regulator.
I used a Pacet pump on emily with about 6 psi of boost and had no issues with fuel pressure
injection can get quite complicated, as you have to electronically "inform" the ECU about the boost pressure, on top of rpm and throttle etc etc and it could all get a little expensive. I am confident that the carb will work, would be fairly easy to swap it for the turbo version if this turns out to be a problem. The only reason I have not gone for the turbo one originally is that they seem to be overpriced on ebay.
No idea what needle I should use though... winsu does not have a forced induction option, I will put in the engine spec anyway and use what it suggests as a starting point.
thanks for everyones input!
Picky
1969 Four door Saloon Old English White 1275 with ported head and HS4 carb. Wolseley 1500 front brakes. Currently off the road with a leaky master cylinder!
Yes i used the regulator from the metro turbo with a return to tank and worked well
I am confident that the carb will work
i would start looking for a turbo one now, as you will only end up with petrol vapor in the engine bay or leaning out under boost and poping a hole in a piston or valve damage.[/quote]
sure vizzard talked about turbo needles, but that's solved by using a metro turbo carb
you seem pretty clued up on the potential problems of using a standard carb, I will look out for a turbo one. what purpose does the fuel regulator have? If I am already attaching a boost pipe to the float chamber, then the fuel pressure should match the incoming boost from the supercharger.
Picky
1969 Four door Saloon Old English White 1275 with ported head and HS4 carb. Wolseley 1500 front brakes. Currently off the road with a leaky master cylinder!
If it's any higher than the pressure in the carb it will pour out through the jet like a fountain! I still think this would be a lot easier with mapped injection - something like Megasquirt.
creating an imbalance of boost pressure v. fuel pressure is common on several turbo applications, and recommended by david vizzard. The difference in pressure is only meant to be slight I believe.
1969 Four door Saloon Old English White 1275 with ported head and HS4 carb. Wolseley 1500 front brakes. Currently off the road with a leaky master cylinder!
Correct me if i've misunderstood your website, but your supercharger is designed to go between the carb and engine,not before it.
The reason is because the supercharger needs the fuel flowing through it to give the needed lubrication to stop the thing seizing up. How are you planning to overcome this?
cheers, Daniel
cheers, Daniel
[img]http://www.daniel-robins.co.uk/becky%20web%20pics/20052.jpg[/img] [img]http://www.daniel-robins.co.uk/archie/10107.jpg[/img]
The pulling power of a Turbo Diesel! The voices may not be real, but they have good ideas.
the supercharger is from a 2006 BMW mini cooper, they dont use carbs anymore! it is from a fuel injection engine, so the supercharger would never see fuel in its original setup. There are two sets of gears at the front and the rear of the supercharger, and these are filled with oil to keep everything running smoothly.
Picky
1969 Four door Saloon Old English White 1275 with ported head and HS4 carb. Wolseley 1500 front brakes. Currently off the road with a leaky master cylinder!
