Wintter project Mmmm

[andyf]

I've thought about some prior to going to NMS rolling road.

Is it true though that they wear quickly due to being alloy? Maybe the Ford ones are too?

I'm not sure but I think the Ford ones are plastic, they're certainly described as being fragile in the Haynes manual!

[Dick]

Will you feel 20 hp er i dont thinks so you would be lucky to get 20 out of swinging cam timming its more about moving power than gainig it. What i will say is mark the plullies up then conect a timming light up and rev the engine up sharp. Your be surprised how much the timming moves . I have seen over 10 deg of cam movment. Its a belt rember. Im sure jeff will add to this. Close cam timming the norm on most fast cars the pissing about is for pub talk.

[Matth93]

On the vauxhall's I was racing I used line the engine up how I wanted it and redrill the locating pin hole on the cam pulley to get the cam timing spot on, ok you couldn't adjust it unless you drilled it again but they would never slip out of adjustment either .

[Tony T]

This is one reason for Vernier pulleys on 20xe it's a pig to get the timing right even the factory don't use the mark's. They don't line up any way they de tuned these engines to 150hp by altering ex cam and the ECU get of the ECU and timing it TDC BOOM 190hp I got that on standard pulleys I still couldn't line the cam mark's up

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[Tony T]

Well all timed.Saturday ross and colin turned up and started work it pretty much much tried to rain all day. The result was 7% out now that has got to be worth it even if I can't feel it. just a bit more fetterling with the mapping and m.o.t and i'm on the road. Next just a bit of airo to try improve engine bay air locking or air damming

Tony T

[Dick]

Tony I must ask you are setting these cams up with a tdc protractor and dial gauge? did you get the cam timing from vaxhall or do you have aftermarket cams?

[Wingco]

Hi Dick,
As far as I know these are standard cams that came with the engine, this engine as far as I know was brand new when Tony aquired it.
We did use a tdc protractor and dial gauge and as far again as I know we found tdc or as near as dam it.
The megajolt was then loaded and changed where needed.
It seems to tick over very nicely and revs very freely, the next stage apart from getting his MOT and new front tyres is to take it for a good run, Ross will have the laptop on his lap in the passenger seat and change if and when needed.

Anything technical you won't to know you had better ask someone else

[Dick]

Ok so tdc was found and set but how did you set the cams to the relevant timing of the crank, max lift of a cam is normally about 106 to say 110 deg this needs to be known and the the cams rocking position can then be set. you get the max lift point of the cams and then dial it to the btdc and bbdc points.This is the start of any cam timing from then on you need to work out how much clearance you have between piston and valves when open and this gives the safe amount of cam timing that they can be swung on a r& r

[Tony T]

Wingco is almost right I built this engine after I got it.
The cam's are standard. Vauxhall no nothing about these engines partly because it's Coswoth built by Coswoth for a turbo for Vauxhall. The records only go back 10 years. I couldn't speak to Coswoth they might no more if I spoke to the right person. I don't think that coswoth no much either nothing in it for them. Can you imagine 190 plus a turbo you would have to fit tractor wheels on it so you could get it out of the fields

Tony T

[Wingco]

After we got the true tdc we then put the dial gauge on the exhaust side cam, we put the gauge on the first lifter just under the first lobe, turned the engine round until we got max lift, i don't no the figure though.
I will try and get Ross to write up as well as he was doing it and seemed to know what he was doing.