Input/help please on DesignTek Valvetronic fitting for 996 C4 Cab

Hello all, I've just taken delivery of the DesignTek vavletronic exhausts, for my 2002 996 C4 Cab. The helpful sales people said it is easy to fit, with useful guides, but sadly I can't work out from the guides sent how to fit to my specific model. A quick call into Design911 and they don't really know either, instead suggesting it is a specialist only job. That said I have the silencer boxes fitted, new clamps etc. The electrical side seems clear enough, mount the new solenoid in the engine bay somewhere, mount the control box in the cabin somewhere, using a clean earth a finding a live ignition for power source. It's just the location of the vacuum pipes & solenoid that I'm stuck on. I'm told to hook into the existing vacuum lines, using the t's supplied, but for the life of me I can't work out which are the right lines to hook into, and where I should hook into them. I've read the various previous related posts but still can't figure it out. Anyone able to help? Many thanks!

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Thanks. I've watched this video, as aside from the annoying audio (not sure it adds anything) what it doesn't show is the vacuum pipe connections within the engine bay, nor does it show the electrical connections. I saw another which shows a car with regular exhaust and then the DesignTek one fitted, but not HOW it was fitted - that's what I'm struggling with! Many thanks

go back to Design911 on this does any of this help, even if it's for a 997 https://www.design911.co.uk/uploads/pdfs/DT_Valvetronic_exhaust_997-1Turbo_Fitting-instructions.pdf then this thread 997.2 c2 3.6L Y2009, DesignTek Valvetronic Exhaust Vacuum Hi, all. My car is 997.2 c2(base model not S model) 3.6L. Lately, I've bought aftermarket exhaust, DesignTek Valvetronic from England. I'm not an expert mechanic, so I asked expert to change original parts to new exhaust. (I don't have a PSE option.) Product's homepage described that the... 911uk.com

Thanks again. It helps to show how complex this is, and that i'm not the first to have challenges with getting the right tech support from Design911. I've bought many general parts from them before, but having second thoughts on future purchases now. Thank you for the extra guides, but still nothing actually looks quite how I'm expecting it to look. I'l attached a few pictures now to see if that helps to define my problem and also point towards a solution. The instructions start by saying remove the air box (easy enough) but don't say why. I assume it's to allow access to somewhere. Picture below - Pic 1 - is with airbox removed. Does this show anything I need to be aware of but missing through my lack of knowledge? Next the instructions suggest mounting the solenoid supplied in the kit onto a mount used for the reservoir on left of the engine bay, only the bracket supplied won't fit in the space - shown in pic 2 below. - So, I will ask Design911 whether the solenoid has to be mounted here, or can be elsewhere. I'll report back The last of the instructions says 'connect the solenoid valve to the intake manifold' and the solution diagram (pic 4) shows 'Solenoid on inlet manifold' at the top. I assume this is shown in my pic 1 but I don't know what I am looking for, which part is the solenoid on inlet manifold? And, assuming it's there, how do I tap off from it? Pic3 shows things closer, and where I think a vac line is, but not sure. The kit supplied does have a couple of brass t's, I just don't know which line the 't' connects to in the top of the diagram.

maybe be worth taking it to Porsche Torque in Uxbridge, best specialist in the country

When I did mine I used a vacuum line from the plenum. Cut it and put the T piece in. Taking the air box out gives you room to do this. You can mount the valve anywhere. I put mine down near the air pump (I think that's what it is...). Left hand side of the engine bay at the rear of the car.

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Many thanks! Clearly I'm a thickie here as I've no idea what or where the plenum, perhaps this DIY project is a bit out of my league. I'll do some.extra research, and I don't suppose you have a picture of where you out the t junction in?

the plenium

Brilliant, thanks. When I'm back behind the car tomorrow I'll see whether I can translate this to what I can see and therefore where to tap into

maybe this pdf helps

Please see a couple of pics of where I plumbed mine in.

That's perfect, thanks corneg. Out of interest, how did you route the electrical connection from the control box (in the cabin) to the solenoid in the (in the engine bay). The instructions suggest cutting a small hole in a rubber between the cabin & engine bay, but as mine is a cab I can't locate the hole referred to - maybe doesn't exist in the cab models. The power cable is quite thick, especially with the push fit connector attached, so the hole would need to be quite wide, did you remove the connector in order to fit it through? Or find another routing method?

Hello - mine is a coupe, I found a hole with a factory grommet already in under the carpet that covers the rear shelf behind the seats. Cut a hole in that and routed the cable through. I didn't need to cut the connector off. I am not sure with yours being a cab. You have a similar space from memory but its filled with hood gubbins. You will need to put the hood into service mode, remove the two retaining cables on each side in order to be able to remove the carpet/cover. Then you might be able to find a route the feed the cable into the engine bay.

I just installed mine. Is the valve always open by default? Have to close it via the remove each time I get in.