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MarkKassim

Plenum Expansion Spacer by PNM

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Hi guys, I’m in the process of ordering a 25mm plenum expansion spacer from PNM engineering, Pete is having these made. It will come as a kit including gaskets and extended bolts. I can’t give an exact price at the moment, but it will be around the £150 + gaskets and bolts, possibly less if we have the numbers. If anybody would be interested in this modification could you add your name to the List. 

1)      Mark K

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1)      Mark K

2)      Pan

3)    Chris

4) Barrykearley 


Only here once

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Hi Chillidoggy , I have a dyno result before and I plan to Dyno again after I fit it. It may be difficult to interpret the results due to my other modifications. I believe it increases VE at higher RPMs. My tuner at Emerald is very good at explaining the Dyno results I will ask him. Dave Changes will have the a lot of dyno info on this.

Mark K

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What about turbo lag? Its documented that Tony Rudd when designing the turbo installation kept the volume of the crossover pipe and plenum as low as possible to reduce lag.

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Hi Andy,

              I asked the same question when I upgraded the charge cooler to approximately 3 times the volume. I was told its so small you dont notice it , and after driving with the bigger Charge Cooler I didn't notice any increase in lag. This is only 25mm deep , I've seen on other forums bigger spacers. I hope to have an updater from PNM this week.

Mark

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Just an update, I will firm up prices and contact info soon. The first is here which I will fit this week

3825039_Spacer2.jpg.376756281566b66c684ca7b0b1c239ac.jpg

The kit includes two gaskets and stainless steel extended bolts

1636509443_Spacer1.jpg.63cabbb8f9943d690ae7fde4cfcaff39.jpg

The top section is angled to improve flow into the plenum.

Mark

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I have now fitted the plenum expansion plate, the install is easy as there is good access.I’ve ran the car hard at Castle Combe at the weekend and noticed it feels like it has more torque at high RPM and delivers it is smoother,  which would be due to the better flow distribution across all four cylinders

2034517086_Spacer3.thumb.jpg.9a300f67e0205d6325cb03da4dc46075.jpg

The spacer is made from aluminium and has been machined to follow the contours of the plenum. The bolt holes have small counter sinks for easy location when fitting. The top section is angled to allow better flow into the plenum. The kit includes stainless steel hex head bolts and washers along with a pair of gaskets. The exiting support bar which bolts onto the engine mount can be retained, I offset it at the mount by using an addition nut. Overall it was an  easy mod with a 13mm spanner.

The Plenum is now available to Pre-Order here on PNM's website:

http://www.pnmparts.co.uk/lotus-plenum-extension-9090

It's available as a kit or just the plate, priced at £169.95 + VAT for the plate and an additional £29.95 for the gaskets and bolts (kit) plus delivery. PNM have agreed to give a 15% discount to this group buy which will apply to the plate and kit, I will PM the discount code to the you guys on the list which is valid until the 10th June. The discount is open to another 5 if anyone else is interested. Delivery charges are calculated on the website including shipping overseas.

Mark K

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:thumbsup:


88 Esprit NA, 89 Esprit Turbo SE, Evora, Evora S, Evora IPS, Evora S IPS, Evora S IPS SR, Evora 400, Elise S1, Elise S1 111s, Evora GT410 Sport

Evora NA

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