Richf Posted June 1, 2016 Posted June 1, 2016 H-Dev Plenum Spacer kit Group buy We have an order of these coming in shortly so thought we would offer a group buy The plenum spacer adds more midrage power and torque to the DE and Rev-Up engine, we typically see between 5-15hp difference depending on the car You will receive: 1x Horsham Developments 8mm Plenum Spacer 1x Horsham Developments plenum gasket Fitting kit Detailed illustrated fitting guide The plenum spacer adds more midrage power and torque, we typically see between 5-15hp difference depending on the car Our usual price is £159.99 5+ = £144.99, 10+ = £129.99 Postage and packing for UK mainland is £5.34 The GB will close on the 15th June - to get involved, get your name down on the list below , we will contact you after this date for payment and shipping details Additonally we can fit the spacer and remap your car for a special price of £449.99 plus the cost of the spacer. 1. 1 Quote
GrahameJ Posted June 1, 2016 Posted June 1, 2016 That's good timing for me, as I have just finished the suspension and braking mods. 1. GappySmeg 2. GrahameJ 3 4 5 6 7 8 9 10 Quote
Bullet Posted June 1, 2016 Posted June 1, 2016 1. GappySmeg 2. GrahameJ 3. Bullet 4 5 6 7 8 9 10 Quote
Andy_Muxlow Posted June 1, 2016 Posted June 1, 2016 1. GappySmeg 2. GrahameJ 3. Bullet 4. Andy_Muxlow. 5 6 7 8 9 10 Quote
350jimbobz Posted June 1, 2016 Posted June 1, 2016 1. GappySmeg 2. GrahameJ 3. Bullet 4. Andy_Muxlow. 5. 350jimbobz 6 7 8 9 10 Quote
russyb Posted June 1, 2016 Posted June 1, 2016 Is it possible to just order a new orange gasket as mine has seen better days ? Quote
Jez @ H-Dev Posted June 2, 2016 Posted June 2, 2016 Yes, they're £24.99 - also, they're white now rather than orange Give us a call on 01635 247477 to order Quote
GrahameJ Posted June 2, 2016 Posted June 2, 2016 I'm going to modify the lower plenum when I fit my spacer ala the Motordyne modification. Anybody else having a go? Quote
GrahameJ Posted June 2, 2016 Posted June 2, 2016 Roughly 2mm is shaved off the top of the front 2 inlet manifold trumpets/runners. The theory being this allows more air to reach the front 2 cylinders, which is the restriction we are trying to overcome by fitting the plenum spacer. It's modified lower plenum designed for the Revup engine, but if it works for that I can't see why it wont work on a DE engine too. See Motordyne's site: http://www.motordyneengineering.com/index.php?cPath=2_8&osCsid=1c6f5ca491c5f2c0ebb148a80cf714e4 Quote
Wasso Posted June 2, 2016 Posted June 2, 2016 I believe it's been tested on a DE lower collector on a DE engine and me no difference what so ever. 1 Quote
GrahameJ Posted June 2, 2016 Posted June 2, 2016 (edited) If Motordyne's figures for testing the differences between a 1/2inch and 5/16inch spacer are accurate than it should be a possible gain of 1.664 HP difference for a normally aspirated engine - zilch as you said! The big gains are from fitting the 5/16inch spacer in the first place - as per this group buy!!! Here is the theory explained on their site - Plenum Spacers & The VQ35 DE : https://motordyneusa.com/vq35-de/ Edited June 2, 2016 by GrahameJ Quote
Sidewayz Posted June 2, 2016 Posted June 2, 2016 1. GappySmeg 2. GrahameJ 3. Bullet 4. Andy_Muxlow. 5. 350jimbobz 6. Sidewayz 7 8 9 10 Quote
Randy_Baton Posted June 2, 2016 Posted June 2, 2016 Are these fairly to install and do they do anything without a remap? Quote
Sidewayz Posted June 3, 2016 Posted June 3, 2016 Are these fairly to install and do they do anything without a remap? Pretty sure any performance mod on the zed needs a remap otherwise the ecu just reigns it back to stock hp Quote
Harty06 zed Posted June 3, 2016 Posted June 3, 2016 1. GappySmeg 2. GrahameJ 3. Bullet 4. Andy_Muxlow. 5. 350jimbobz 6. Sidewayz 7. Harty06 zed 8 9 10 Quote
Richf Posted June 3, 2016 Author Posted June 3, 2016 (edited) Are these fairly to install and do they do anything without a remap? Fitting instructions here , have a read and see if its something you are comfortable tackling h-dev plenum spacer.pdf Edited June 3, 2016 by Richf@H-Dev 1 Quote
STYLZ Posted June 4, 2016 Posted June 4, 2016 Are these fairly to install and do they do anything without a remap? Pretty sure any performance mod on the zed needs a remap otherwise the ecu just reigns it back to stock hp Is this true??? Will I see any gains without a remap?? If the answer is yes then please put me down for one also. Quote
Richf Posted June 4, 2016 Author Posted June 4, 2016 Are these fairly to install and do they do anything without a remap? Pretty sure any performance mod on the zed needs a remap otherwise the ecu just reigns it back to stock hp Is this true??? Will I see any gains without a remap?? If the answer is yes then please put me down for one also. You will see gains ,, we did one on Friday and it made about 7hp pre - post spacer but the car had already been mapped so it wasnt really a fair comparison Quote
Richf Posted June 4, 2016 Author Posted June 4, 2016 (edited) Chieveley, Berks http://h-dev.co.uk/contact/?v=79cba1185463 Edited June 4, 2016 by Richf@H-Dev Quote
STYLZ Posted June 5, 2016 Posted June 5, 2016 Shame you're so far away, I'd have come down to see yous to see about my zed. Have you had any stock zeds to compare gains with? Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.