speedvision cam timing

[350ep70gr]

Chris,

No other info, i never received a data sheet with mine.

It will idle rough and it will not rev up at all, Chris@CCM will back me up here also, if needed.

Ive asked Mark for a copy of the data sheet, just to see what it says.
Thats my only thinking, the lobes have been ground out of allignment.

Rory do you have them still on the car?
If yes just ignore the top marks put 1st cylinder at tdc and put both cams in such a way that both have their valves open at full lift.(idealy you need the exhaust valve to have more lift than intake) With this way you will be as close as possible.
If with this way it works beter (it will) then You need the data sheet from Mark and a dial micrometer but will be a bit tricky to readjust the gears the way you want them.
If the timing isnt ok dont bother with adjusting the emu.

Chris

 

[MARK@CMBAUTOS]

If yes just ignore the top marks put 1st cylinder at tdc and put both cams in such a way that both have their valves open at full lift.(idealy you need the exhaust valve to have more lift than intake) With this way you will be as close as possible.
If with this way it works beter (it will) then You need the data sheet from Mark and a dial micrometer but will be a bit tricky to readjust the gears the way you want them.
If the timing isnt ok dont bother with adjusting the emu.

Chris

thats exactly wat i did and is wats being done at the moment

 

[billybob]

Rory do you have them still on the car?
If yes just ignore the top marks put 1st cylinder at tdc and put both cams in such a way that both have their valves open at full lift.(idealy you need the exhaust valve to have more lift than intake) With this way you will be as close as possible.
If with this way it works beter (it will) then You need the data sheet from Mark and a dial micrometer but will be a bit tricky to readjust the gears the way you want them.
If the timing isnt ok dont bother with adjusting the emu.

Chris

spot on chris good input

 

[Rory]

I never bought them directly from Sam.
I bought them from another member.

Golden Rule always make sure u get spec Sheet
Question what was the lash on these Cams ???
Also what was the Lift and Duration??

regards

Gary

Yes there still in the car yet, ive never touched it scince Saturday
Ill wait and see what i want to do, im unsure wether to persevere with these or throw the standard cams back in.
Im wanting the car done asap, im alrerady missing the good weather with it!

Rory do you have them still on the car?
If yes just ignore the top marks put 1st cylinder at tdc and put both cams in such a way that both have their valves open at full lift.(idealy you need the exhaust valve to have more lift than intake) With this way you will be as close as possible.
If with this way it works beter (it will) then You need the data sheet from Mark and a dial micrometer but will be a bit tricky to readjust the gears the way you want them.
If the timing isnt ok dont bother with adjusting the emu.

Chris

 

[Texx]

Can anyone get a couple of good photos showing where cyl No.1 intake and exhaust cam lobes sit when No.1 piston is at TDC of it's non-firing intake stroke? It would also be good to see similar photos of No.3, No.4 and No.2 after each 180° revolution of the crankshaft.

 

[Rory]

Ill do it later Terry when i whip the cam cover off.

 

[HYBRID]

so far im reading alot yet not reading anything.. can somebody throw up a list of what actually is wrong with these cams please?

i dont want to open my head up only to find out i have wasted time/money & a head ...

kon

 

[Rory]

As said in another thread Kon, i think the lobe position to dowel pin location is wrong, ie the angle they have been ground on.

 

[HYBRID]

thanks rory

kon

 

[Shorty]

im intrested in seeing the pics of the cams in a head showing the issue too, as this is the second or third thread about issues with these and it may help for sam to see the actual problem so he can get it delt with.

 

[speedvision]

As said in another thread Kon, i think the lobe position to dowel pin location is wrong, ie the angle they have been ground on.

rory the pin which locates the ex gear is what i was told is in the wrong angle..some degrees out ........i think the pins are placed after the cams are made and the cams are ground according to the mold which is standard

but according to you ur cams line up fine which should work well becuz all the cams with timing correct is running fine...are u sure there is no tuning issues?

spuddy:

same cams, same supplier, noting different ..all i can see is the pin in the wrong angle throwing the timing off...

has anyone thought of moving the pin in the right angle so the gear can line up?

sam

 

[Ted]

heres what ive found.

first exhaust cam i got had the gear locating dowel in the wrong place- 2nd also in wrong place- different this time but still wrong. i timed both up using the pulley dowell instead but car wouldnt run right. i was at the mercy of whether it was an exact number of teeth wrong or not- it wasnt.

both intake and exhaust would probably need an engineering firm to drill and place dowells in the right place- we are talking such fine tolerances they have to be right.

2 places i took mine to took one look at them and didnt want to get involved( obviously in case they fucked it up).

its not beyond rocket science to get these right. i know they are pretty cheap for the amount of engineering that goes into them, i would have paid another 100quid for a bit more quality i think.

hope you get this sorted sam, first sets that spuddy and phil got were spot on and a great upgrade.

 

[Rory]

I can garantee the pin is in the wrong position.
All marks line up spot on, that doesnt mean they will work and they are not.

There are no tuning issues, I highly rate Chris at what he does, there is no issue there.

Sam throw up a copy of the data sheet for the cams. Let everybody see.

As Ted says, they have to be spot on, or they wont work.

rory the pin which locates the ex gear is what i was told is in the wrong angle..some degrees out ........i think the pins are placed after the cams are made and the cams are ground according to the mold which is standard

but according to you ur cams line up fine which should work well becuz all the cams with timing correct is running fine...are u sure there is no tuning issues?

spuddy:

same cams, same supplier, noting different ..all i can see is the pin in the wrong angle throwing the timing off...

has anyone thought of moving the pin in the right angle so the gear can line up?

sam

 

[Texx]

Has anyone tried timing up each cam individually, ignoring the alignment marks on the cam gears?

 

[Ted]

Has anyone tried timing up each cam individually, ignoring the alignment marks on the cam gears?

i explained thats what i did up above mate. you can only time up each cam by exact numbers of cam teeth tho- anything in between and your screwed.

 

[billybob]

i explained thats what i did up above mate. you can only time up each cam by exact numbers of cam teeth tho- anything in between and your screwed.

hopefully it gets sorted pictures would be nice with the spec sheet

 

[Texx]

i explained thats what i did up above mate. you can only time up each cam by exact numbers of cam teeth tho- anything in between and your screwed.

Sorry, I missed that bit mate. How did you go about timing up each cam? Did you just attempt to align them by eye, or did you use a dial gauge and timing disc to make a TDC mark for each camshaft?

I get what your saying about the cam gears limiting the amount of available adjustment, I'm just trying to understand how you've confirmed it's not possible (I'm not saying it is possible) to align the cams into a position where they produce a usable result.

 

[Murray]

But surley with these cams, since there not the "lariest" or lumpy they should work with the standard timing marks easily. As been mentioned above something aint right.Are these not inspected before shipping? Or just straight of the machine, no checks, to the customer?

Rore how about this idea for them, mind next doors wind chimes...........or a cam throwing competition?

 

[speedvision]

Rory do you have them still on the car?
If yes just ignore the top marks put 1st cylinder at tdc and put both cams in such a way that both have their valves open at full lift.(idealy you need the exhaust valve to have more lift than intake) With this way you will be as close as possible.
If with this way it works beter (it will) then You need the data sheet from Mark and a dial micrometer but will be a bit tricky to readjust the gears the way you want them.
If the timing isnt ok dont bother with adjusting the emu.

Chris

seems like u have done a bit of work in this area......thanks for the info and trying to help out...

so ur saying that most of the cams u do dont line up and this is what you do to make them work?

i will scan the data sheeth and post it up later in the day..

sam

 

[350ep70gr]

seems like u have done a bit of work in this area......thanks for the info and trying to help out...

so ur saying that most of the cams u do dont line up and this is what you do to make them work?

i will scan the data sheeth and post it up later in the day..

sam

Sam i have done a bit of work but on different cars.
Two times we have buy Kent cams in the past one for turboing a peugot 106 and the other on a b16a honda both was out of aligment. We go to the dyno with close to standard marking and the car was produce less than when stock cams. Then we play with the timing following the data sheet and the car was so much more powerfull than previous.
Really the data sheet is the key. Even if you dont want to use it and time the engine straight at the dyno it is a good reference point to check things.
You have a limitation on the cam gears due to their design but if you are clever enough /or have some experience you can deside what you want and fix them one time and trou them in.
On the other hand..following the data sheet ..will make them work no matter what.

Chris