Roush supercharger boost relief valve

Hi,Some help needed off someone who owns a Roush car please,I am in the process of fitted a Roush supercharger,but it was not a complete kit,I have managed to make most of the missing pieces by looking at the manual.One thing I cant work out because its not clear in the manual is where do the two ports connect to from the vacuum operated boost relief chamber ,the manual says both to the vacuum harness,I have not got the vacuum harness so it makes no sense to connect both to the same vaccum source,Could someone please trace the path of these two pipes on a car please and let me know.Many Thanks Karl

I will have a look for you, where do you live and who are you getting to map ther car?

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Originally Posted by mgnumber49

Hi,

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I don't see anywhere you have been welcomed:

WELCOME :D

MG ZT260 FAQ

Two-sixties Blog

Items For Sale in Public Section

Why arn't you green?
(We have many lists in the Members Section that will help you when you own a 260/75V8, and go green)

Welcome along Karl, don't stay blue :)

Hi Nigel,I live in leicestershire. I have a Roush ecu,another question,does this need coding to the car for the immobiliser or does the Rover ecu take care of this.Many Thanks Karl

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Originally Posted by mgnumber49

Hi Nigel,I live in leicestershire. I have a Roush ecu,another question,does this need coding to the car for the immobiliser or does the Rover ecu take care of this.Many Thanks Karl

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You would do so much better if you became a full member on here :thumb

Hi Karl, you're in a select bunch there are only a handful of Roush charged cars. Both Nigel and I together with a few others on here have similar cars.

Another member (and former owner) on here Linden Cahill might be a good point of contact as he has done a lot of work on his this type of engine. Nigel has also arranged for his engine to be fitted and will have good info for you.

As Colin says you would be advised to become a full member here as there's a lot of V8 specific info which will be a huge help in keeping these cars on the road.

Ken

Hi Karl,

This link http://s1087.photobucket.com/user/Ba...76296127660963

Has some of photos of the Supercharger before and after I had it fitted. I hope they help.

I have photos taken when Barry removed the S/C bits of his enging and ill get them onto Photobucket later today.

regards

Hi Karl

I've taken a couple of photo's of my set-up which may help.

On this one you can see the two vac pipes connected to the relief valve actuator.

https://www.two-sixties.co.uk/galler...m/DSCF4887.JPG

This one shows where the two are connected. The black one is in the corrugated sleeve and connects to the induction pipe. The red one connects to the vacuum manifold next to the throttle position sensor.

https://www.two-sixties.co.uk/galler...m/DSCF4889.JPG

Here's an image of the general layout, which may help.

https://www.two-sixties.co.uk/galler...m/DSCF4556.JPG

If you have a Roush ECU it will need a T4 session for your car. There is also a wire swap you need to do on the ECU for the radiator fan otherwise it will run continuously. From memory the Roush ECU is only good for 360Hp. I run mine for the first 2000 miles on one borrowed from Linden but a custom map on the standard ECU makes all the difference.

What injectors are you using? If they are the standard 260 ones then they will be no where near big enough. IIRC the standard Roush ones are 39lb/Hr but Jamsport recommended that I upgraded mine to 42lb/Hr.

Good luck with the upgrade.

You beat me to it Nige.

Some more pictures from when Barry took the S/C of his engine.

http://s1087.photobucket.com/user/Ba...21434268169183

Gents, will try to post some photo's of my set up (Lindens car) if my tech ability will allow, may go some way to helping. Sorry but the finer points of the technical side of the car are a bit lost on me so I will continue to read as I have learned some things from this thread already.

Andrew

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Originally Posted by mgnumber49

I have a Roush ecu,another question,does this need coding to the car for the immobiliser or does the Rover ecu take care of this.Many Thanks Karl

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Sorry just seen this question, If the Roush ECU you have was going to be fitted to a MG ZT385 it should work fine. However, realistically I`d be very surprised if you have an original MG ZT 385 ECU. You may have one that was going to be fitted to the MG SV-S? Either way Jamie from Jam Sport Racing used my standard ECU and remapped it. (approx £400 to £600 as he did with Re-Treads `Dave` ECU) My Vacuum set up differs from Dave?s and other Roush engines I have seen? Possible because I fitted the S/C to my engine whereas Dave?s fitted a new engine with the S/C already attached.
Hope this helps
PS, Can I ask where you obtained the S/C and bits from?

Regards

That Roush setup looks very neat, how does the Roush the setup compare with the KB, I don't mean from the graphics point of view but has anyone here had the pleasure of driving both types, is it more economical, how do they compare in real time with acceleration torque and engine flexibility, I won't ask which is best because each will favour their own installation.
Why did MG not ask KB to supply the S/C, hope I'am not high-jacking this thread.

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Originally Posted by WNJ516

............, how does the Roush the setup compare with the KB, .

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The KB is better at the top end, The Roush is better at the bottom end. (I am sure that is right)

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Originally Posted by AndyG

The KB is better at the top end, The Roush is better at the bottom end. (I am sure that is right)

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I believe that was Brian's view when he had both his own car and the proto type Roush car before he dismantled it, and was able to compare back-to-back.

Hi,Just like to say thanks for everyones help,the car is now up and running "Roushcharged" Many Thanks Karl

Great news Karl.

Where did you get the map done? Have you got any figures, assuming it was done on the rollers?

Above all are you pleased with the result?

Nice one :-)

Please put some pictures up when you can.

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Originally Posted by Bainzi

Nice one :-)

Please put some pictures up when you can.

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If only he could Nigel, he's not a member unfortunately........'You can take a horse to water' and all that.


Nich.