free hit
counters
BOV / Dump Valve - Engine/Ancilliaries - The Lotus Forums Jump to content


Recommended Posts

This came on the car but I want to remove it. Talk me out of it if you can but I don't like the noise.

 

If anyone want's to buy it from me, please PM me an offer.

 

Questions:

1. Do I just replace the T-piece with a straight through hose - I'm assuming "yes" ?

2. How is the smaller vacuum pipe arrangement altered? This is how it looks now:

 

(apologies if you need to turn your head sideways but when I uploaded the images they got rotated!)

Link to post
Share on other sites

Upgrade today to remove Google ads and support TLF.
  • Replies 12
  • Created
  • Last Reply

Top Posters In This Topic

  • Gold FFM

I can understand very well you don't like the noise. But my current and previous Esprit came with an open BOV, and I wasn't too happy with it either. The first one I could replumb to recirculate via the airfilter, the second one is a different design and will have to be replaced.

A BOV does have it's use, but an Esprit doesn't need a whooshing sound to draw attention. ;-)

I have made many mistakes in my life. Buying a multiple Lotus is not one of them.

 

Link to post
Share on other sites
  • Gold FFM

That's exactly what I did. My first Esprit actually had a recirculating BOV, but it was left open (maybe the German owner liked the whoosh). I connected it to the airfilterbox via the inlet from the crankcase ventilation, and rerouted that to a catchtank and filter.

Much better, you could still hear it, but only when paying close attention and pushing hard enough. :-)

I have made many mistakes in my life. Buying a multiple Lotus is not one of them.

 

Link to post
Share on other sites

After doing the ram air mod on mine I wasn't happy with the lack of BOV. You can really hear the surge when the throttle shuts and I'm sure a few of the pops were back through the turbo rather than from the exhaust. Not good.

 

I'd try and find a way to re-circulate it or fit a recirculating one.

Link to post
Share on other sites
1. Do I just replace the T-piece with a straight through hose - I'm assuming "yes" ?

 

 

I believe there should be a black/white check valve in that line. Make sure it hasn't been removed and replaced with that "T" piece.

 

There is a message thread somewhere on the forum listing the problems people have with blow off valves (adjustments are critical and may do more harm than good).

Edited by Qavion
Link to post
Share on other sites
  • 3 weeks later...

Just to note. The HKS SSQV requires no adjustment at all as it works on vacuum. It does need a good vacuum source though. I had to use the MAP sensor port rather than the one for the charcoal canister. You can also get a kit to have it recirculate if you don't want the noise.

 

Our cars may not have had a BOV from factory but personally I think that was a mistake. These aren't a low boost application.

Edited by cammmy
Link to post
Share on other sites

I believe there should be a black/white check valve in that line. Make sure it hasn't been removed and replaced with that "T" piece.

 

There is a message thread somewhere on the forum listing the problems people have with blow off valves (adjustments are critical and may do more harm than good).

Just checked and the valve on my car has the black bit facing the cylinder head/T-piece.

Margate Exotics.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.




×
×
  • Create New...