View Full Version : Optimus Prime
Robots in disguise
Not quite - but look what arrived on my desk today :D
http://www.seatcupra.net/m0rk/optimus/1.jpg
http://www.seatcupra.net/m0rk/optimus/2.jpg
Sorry for the poor quality photo's - it's only on my phone.
Dormouse
31-03-2005, 10:54
LOL. My bath has a smaller 'plug' than that :yes:
For an explanation of the adjustable bit :
http://www.forgemotorsport.co.uk/content.asp?inc=product&cat=0006&product=FMDVOPT
Tell em' to get cracking on the TIP. I took one off last night (std) and I was gobsmacked to see how narrow the airway was :(
Dor.
Chemical Al
31-03-2005, 11:02
is that a whhooooossshhhheeeeyyy one? ;)
lol, works well it does too, handy adjustableness means no fidgly springs and quicker acting to boot :thumbup:
lol, works well it does too, handy adjustableness means no fidgly springs and quicker acting to boot :thumbup:
I wouldn't know :p Someones got mine :whistle:
;)
:whistle:
rattling round the tray in my car
I've got a polished one sitting at Star Performance right now! :D
sportbilly
31-03-2005, 13:27
Looks nice, could be tempted with one myself.
Assume you can tell from looking at it what strength its set to - obviously by default most would want it equal to the stock DV007P.
Dormouse
31-03-2005, 13:58
woot is it?
See my link in post 2. It's a re-circulating dump valve.
Dor.
Dormouse
31-03-2005, 14:28
link no worky dor :(
Worky for me :)
Dor.
Chemical Al
31-03-2005, 14:29
and me :)
dalepearson
31-03-2005, 15:27
and me :)
Me 3 :)
works for me ok ?
nice development
I thought it was a vent to atmos not a recirc?.
Technically any DV could be used as a VTA, but not on our cars!
I think the Forge statement is intended to mean "don't come crying to us if it doesn't work on your car as a blow-off valve".
*jumps up and down*
still no worky for me dor! :)
"blow-off valve".
mmm sounds interesting :confused: :whistle:
anyone interested in a group buy? :)
flashbsd
03-04-2005, 16:12
are they any better than the 007p?
and i assume they are just as quiet as the 007'? :)
TIP is what i want too. In red pleeeeaaaassseee :)
it's on the car - set it pretty tight - not much noise at all (std airbox at the moment)
will tighten it up some more to see what it's like
feels much less lag than the aged 007 that it replaced
I couldn't get the small vacuum pipe that was on the car, so I replaced it with some 5.5mm fuel line instead - which was a perfect fit.
Here's mine:
http://www.20v-turbo.co.uk/images/mods2/apr07.jpg
http://www.20v-turbo.co.uk/images/mods2/apr08.jpg
Definately feels better than the 007P, much smoother, quicker and quieter too. Star Performance have them on special offer just now, £92.99 inc. VAT and delivery.
Hmmm ... first full day with the Optimus and all I got was chatter (compressor stall?). I wound it all the way back to the softest setting and still chatter. Removed the Optimus and refitted the 007P with yellow spring, all day today not a hint of chatter at all, just dumping air sound. So ... even on full soft I get chatter, so the spring must be too stiff in the Optimus - can it be changed for a softer one?
Hmmm ... first full day with the Optimus and all I got was chatter (compressor stall?). I wound it all the way back to the softest setting and still chatter. Removed the Optimus and refitted the 007P with yellow spring, all day today not a hint of chatter at all, just dumping air sound. So ... even on full soft I get chatter, so the spring must be too stiff in the Optimus - can it be changed for a softer one?
Chatter as it ch-ch-ch-ch? If it is that's what I get since the dv relocation but I have a 007P!??!?!
Yeah, rather than just the dumping of air noise, which is what you're supposed to get. Chatter is bad for your turbo, means the DV is not expelling all the excess boost pressure.
Went back to Star today and they swapped the Optimus over for another one, this one seems to work better - perhaps the first one was just a bit sticky. Either way this one is much better, holds boost very well. I still think the spring is too stiff, my 007P with yellow spring is easier to open than the Optimus.
Which orientation is the Optimus DV supposed to be installed in?
Same as the 007P?
same as std DV
i havent had time to do any logging yet gary, will do so soon :) (when i find battery that holds its charge!)
Thanks Saul, looking forward to your log results.
I fitted my Optimus a week ago in standard orientation, just 2 clicks from the softest setting. For some reason my car just didnt feel right so I put the 007P back on.
I'll try the Optimus again tonight to be sure though.
did you run it fully wound off?
try it and then build it up half turn at a time if needs be, im seenig rich on sunday so ill log next week
Ive now refitted it wound right back so I'll see how that performs later tonight.
Out of interest I split the DV open and there's a standard green spring in there, obviously no need to uprate it but also no way of making it softer.
I have removed the Optimus and gone back to the 007P with yellow spring, even on full soft I was getting chatter. No chatter at all with 007P/yellow - just air dumping.
I was out for around an hour last night with the Optimus fitted, this time on full softness.
I certainly have no chatter, just smooth dumping - very slightly audiable.
Im going to the ukmkivs RR day at JBS tomorrow so it will get a good run there, session on the rollers and a good run back.
I think I'll put my 007P in the boot just in case.
Fasterbaby
10-04-2005, 14:24
Its very interesting to read this thread, i am pleased i didn't jump in and buy on right away. I'll be looking forward to seeing logs of this. I would still like to get one of these if the diaphragm desing is quicker but would like to know that they work ok first.
sportbilly
10-04-2005, 17:24
I know RobDon's is relocated but are the others relcations ? Anyone tried one in the stock position ?
Saul's is in 'normal' position and so is the one on lorna's
Been given some stiffer springs to try out as the chatter might be down to it bouncing off the top
I have mine in the stock location and its running without problems.
Stock location and stock orientation? Does the engine cover fit back over it, it's taller than a 007?
You getting chatter too Mork? I put it down to the long re-circ. hose of the relocation kit as the cause. 007P with yellow spring does not cause any chattering at all, but even with the stock green spring the Optimus feels stiffer to open.
I did - but i tightened it some more.
so I've got another spring (don't know whether yellow or green as i'm colour blind lol) will try that tomorrow night
m0rk, ill let you know what colour it is :p
Have you tried reversing it to see if the chatter stops, might swap mine round and see what happens?
OK I tried mine in reverse (i.e. standing upright) on full soft and it still chatters, fitted a yellow spring and it's even worse. It's a shame that a Forge DV doesn't work with a Forge DV relocation kit. 007P with yellow spring works 100% fine with zero chatter. I am returning the Optimus to Star for a refund.
fitted a yellow to mine last night and wound it up a bit, its better but still creating a curious sound, ill keep investigating
Chattering is compressor stall, which is bad for the turbo, that's why I'm not using it. I'm running at 20PSI peak boost so it's not as if I don't have enough pressure to open it. If you push the piston with your finger inside the 007P with yellow spring, it moves fairly easily, do the same with the Optimus and it is much stiffer, even with the green spring.
yer i know the chattering is compressor stall, but it doesnt sound like that to me.
ill keep trying.
Feedback will be cool - I'm just gonna stick with the 007P I think.
jonathanp
12-04-2005, 13:39
I have the optimus on mine, tried it on the softest setting and it was leaking a tad, kept increasing the pressure until I got chatter and then backed off a bit
seems to be ok for the time being, there's a weird noise but I've always had that, think its a leak somewhere possibly n75 or n249
DV is installed in the normal place, will probably relocate later in the week
can't think why relocation should be any different unless you're loosing pressure through the IC's as the pressure pushes against the side of the piston/diaphragm to lift it off its seat while the same time you have vacuum from the other port
Will be interesting to see, as the Optimus seems to work ok in the stock location but some have chatter once relocated.
Fasterbaby
12-04-2005, 15:49
I think i'll save my £90 odd quid then, would i be better spending that relocating my 007P? Is it really worth doing this? Any actual figures to support it? Cheers
jonathanp
16-06-2005, 11:34
hows everyone getting on with their optimus valves now? I've been getting the same prob as rob, getting chatter even on the softest setting
anyone got them working or sent them back for replacements?
I spoke with rich about it - tightened it right up on teh standard spring which is then tight, but works spot on.
you're setting it too softly & it's bouncing, rather than chattering.
jonathanp
16-06-2005, 12:23
hrm most annoying thing is I can barely here it over the zorst, lol
have to give it another go tonight
lol. I think maximum 'tight' is slightly more than std 007 stiffness, or just call forge for a stiffer spring if you fancy a tinker
Gave mine back to Star and got a refund.
lol. I think maximum 'tight' is slightly more than std 007 stiffness, or just call forge for a stiffer spring if you fancy a tinker
If I wind mine to maximum tight with a green spring inside then I can hardly push it in at all.
Its like its almost siezed its that tight.
Completly different to my 007P with yellow spring.
Anyone made a vag com check using this one? I am getting a N249 dtc using it.And it does chatter.
RichardBW
27-06-2005, 22:42
Clear the fault if you can and wind the adjustment back off completely. This fault can occur if wound up fully as it can lock the valve in some cases hence DV not working at all and the fault being logged.
The chatter noise is due to the vacuum side design and the different diaphragm materials so its just a characteristic noise of the valve and not a fault as such. If you have an induction kit of any kind then the flutter noise will be quite obvious in the car.
If it chatters all the time how can you tell when it's set correctly and not causing compressor surge from being too tight? Not a very good setup IMO.
Clear the fault if you can and wind the adjustment back off completely. This fault can occur if wound up fully as it can lock the valve in some cases hence DV not working at all and the fault being logged.
The chatter noise is due to the vacuum side design and the different diaphragm materials so its just a characteristic noise of the valve and not a fault as such. If you have an induction kit of any kind then the flutter noise will be quite obvious in the car.
Its still giving the same DTC about N249 not working although i backed the adjustment off to the softest setting :confused:
Any idea why the optimus is not on the Forge website any more???
Its been dropped in favour of a new valve called the Eliminator due out in around 6 weeks IIRC.
Review of the new prototype DV can be found here:
Review and install guide (http://www.uk-mkivs.net/forums/300520/ShowPost.aspx)
Hope it's better than the Optimus, didn't seem very good at all.
Same here Rob, in the end I struggled to correctly set the Optimus up so reverted back to a FMCL007PA piston valve.
I can see the benefits of a diaphragm valve so will probably be trying the Eliminator when its released.
Yeah I hope to try one too.
grant@westec.uk
20-08-2005, 19:57
No dis-respect to forge as they are good people, but we didn't seem to do much with this valve, most people seem to stick to the 007P, works fine with anything I do!