7 replies to this topic

[Jon937]

Has anyone been able to find a variable vane turbo small enough to fit to the a series engine?
I have had a look and struggling to find anything on the subject.
I know the metro turbo has the smallest A/R ratio I can find but is there a small turbo vith variable vain one out there that will work?

Any help greatly appreciated

[Jon937]

Found ford 3 cylinder 1l ecoboost turbo might do it but need to find a reg please?

[Jon937]

Does anyone know how the vain alter how much boost on the Ford turbo; is it oil pressure or electronic?

[mini13]

Ive used VNT turbo's on the mini, you want to go for somthing big, as the vnt reduces the AR so it spools up from low speeds,

 

In my case I used a GT2559V from a 3.0 renault easpace diesel on my 1380 7 port, this would start boosting from 2k, and see a a bar of boost by about 3200, upto about 28 psi at about 5k.

 

usually the older vnt's are actuated by vacum from the brake servo pump, and boost is mapped by the ecu. i just swapped this for a normal pressure actuator, dont ad an inline boost valve as you end up with boost spikes, use a low pressure actuator, say 5-7 psi, then use a closed loop boost controller to map the boost as revs increase

[Jon937]

do you have any photos please mini13?

[mini13]

 

 

 

theres some more in the signature links below if you can be bothered to wade through them.

[coopdog]

That's a big ole turbo, what power did you get out of it? And any vids?

[mini13]

never managed to get a power run on the rollers, any time I took it near a dyno or drag strip it it threw a wobbly, it seemed to have a tendancy for the exhaust guides to bind up, I did a set of valves like that at pod, so coasted over the line with a poor 16 sec at 93 mph, from that teminal on fairly low boost ( about 15psi) it should have run a low 14,

 

after bending the valves at pod I got it up ad running again to have the cambelt go, which took out all the valves, cam and Rods, rebuilt it again with a steel bottom end and it never quite ran right, kept oiling up no 1 plug, so its apart again ( for the last 3-4 years) it going back together with a BMW K1200 conversion with the same turbo.

 

 

when it behaved, it would run happily on 18-20psi, and as I said took it to 28psi... on paper 20 psi should have been about 220 hp, and 28 over 250, but I'd be happy to say it made over 200 at the wheels as a freinds was RR'd at about that and this was quicker.

 

 

 

only one vid with the boost turned right down, so about 7 psi,

 

http://vid95.photobu.../MOV00439-1.mp4

Edited by mini13, 14 March 2016 - 07:23 PM.