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H-Dev plenum spacer group buy


Richf

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Will there be another one? Not in a hurry for it. Ta.

 

Bearing in mind the response to this one I would think so , perhaps in a couple of months

 

Great thanks. Looking to book mine in for a remap with you next April so as long as it's before then :)

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I can't open the fitting instructions doesn't seem to work. 😊
 

 

Sent from my iPhone using Tapatalk

 

Probably an issue with your phone , they open fine on pc. The instructions are supplied with the kit but if you pm me your email address i can send you another copy if you like .

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Received today and going to attempt fitting tomorrow 🙃

 

 

Sent from my iPad using Tapatalk

 

It's not too difficult to do. Remember where the pipes go and make sure you don't trap the oil seal (it's the rubber piece around the oil filler cap) when You refit the plenum

 

And don't over tighten the bolts !!! Have you got a torque wrench?

 

 

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Hi Paul yes my cousins husband has 1 so going over to theirs tomorrow to do it. The fitting instructions look fairly easy so watch this space. When you did yours do you have to reset anything afterwards?

 

 

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  • 4 weeks later...

I fitted mine last weekend, along with a modified lower plenum and a DIY throttle body heater.

I also used 1.5m thick Aramid insulating gaskets between the lower plenum and inlet manifold, and the upper plenum and the throttle body heater.

Mods to the plenum involved shaving 2mm from the tops of the front two runners/trumpets, removal of all casting seams, blending and porting of the runners,

together with some more work on the outer of the rear two runners to allow easier flow on entry to the plenum.

The plenum was finally ceramic coated with Techline's Powercote thermal barrier which I obtained from Camcoat in Warrington.

All this work was done to aid flow and to try and keep the mixture as cool as possible.

 

When fitting I disconnected the battery, as there was a good chance I would disturb the throttle body, and I did have to drill out one of the allen bolts.

These are very, very tight!

Once assembled I then ran through the following reset procedures:

  • Accelerator Pedal Release Position Learning Procedure
  • Throttle Valve Closed Position Learning

On Monday I wasn't impressed with any differences in performance, so that night while the engine was fully warm I then performed:

  • Idle Air Volume Learning (Throttle Position Learning)

Tuesday - I was impressed, finding myself on pole position at the traffic lights I floored it.

 

A big improvement with the car howling away from the lights like never before, followed by a metallic thud.

That was the sound of my Zippo lighter hitting the rear plastics, as it flew backwards out of the cubby.

It had never done that before either! :)

 

I guess the car is now ready for an Uprev on the ecu, before it realises there is now an idiot diving instead of the kind Japanese former owner,

and ramps back the timing and fuel mapping.

 

Lower plenum and H-Dev spacer:

GJ_lower_plenum_zpsxmybm4hz.jpg

 

Upper plenum and throttle body heater:

GJ_throttle_body_heater_zpsgppi0cso.jpg

 

Fitted:

GJ_Fitted_Plenum_zpsflzdpprj.jpg

Edited by GrahameJ
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