Air Flow meter now in the wrong place?
Discussion
I had planned to fit the smooth bore system today but stopped for a couple of reasons. One, the pipe doesnt feel that good a fit on the plenum (over 3 mm diameter gap) but the main one is that unless I cut 70mm off the elbow, the AFM bracket it is in the wrong place. I expected to trim but not change shape completely, which wouldn't be the best to do if the plenum end didnt seal and needed to go back!
Even when plenum fitting is right, the bracket on the AFM is fixed. Should I modify the bracket or is it ok to cut that much from the elbow?
Advice appreciated please
Even when plenum fitting is right, the bracket on the AFM is fixed. Should I modify the bracket or is it ok to cut that much from the elbow?
Advice appreciated please
Edited by TV8 on Sunday 19th June 12:27
Edited by TV8 on Sunday 19th June 12:29
Looks like mine, I had to cut a massive amount off to make the AFM fit back in its proper place. IIRC the instructions do say you will need to cut. I think they are supplied with lots of extra to allow for TVR manufactuing tolerances.
On the Plenum end you need to fit the jubilee clip and do it nice and tight.
FWIW I gained 9bhp when I fitted mine
ETA heres a pic I just took.
On the Plenum end you need to fit the jubilee clip and do it nice and tight.
FWIW I gained 9bhp when I fitted mine
ETA heres a pic I just took.
Edited by bigdods on Sunday 19th June 12:43
It looks like the ACT one I fitted to mine when I was a Chim owner. There is a lot of excess left on these and chopping a biggish piece off is normal. I believe these AFMs were fairly hit and miss in their positioning from the factory hence the extra left on the ACT replacement.
Most important thing is to get the 90 bend true.........I chopped a fair bit off both ends to achieve this...............wait until you fit the one down to the air filter in the nose
Most important thing is to get the 90 bend true.........I chopped a fair bit off both ends to achieve this...............wait until you fit the one down to the air filter in the nose
Thanks both and for the picture - that looks about the same as I need to cut!
When you say do the clip up tight. The plenum is 72 mm, the hose 75 or 76 mm. that seems a lot of excess circumference to close up with a clip.
I will speak with Tim at ACT before cutting.
The bottom one does look a bit tricky. The filter also seems out of the direct line of air flow. DId I see a post about something that captures the air somehow or was that my imagination?
When you say do the clip up tight. The plenum is 72 mm, the hose 75 or 76 mm. that seems a lot of excess circumference to close up with a clip.
I will speak with Tim at ACT before cutting.
The bottom one does look a bit tricky. The filter also seems out of the direct line of air flow. DId I see a post about something that captures the air somehow or was that my imagination?
The bottom one is very tricky, the trick is to have either 3 hands, a handy helper or (the best option) a piece of wood. Put the metal joiner into the short pipe with air filter on, insert this into the nosecone. Place a suitable piece of wood between the pipe and the front of the nose cone so that when you push the pipe on from the engine bay side you have something to push against.
I found I needed to soak the end of the hose in really hot water for a few mins before I could get it to easily slide onto the metal joint piece.
ETA : dont recall the plenum end being loose at all, IIRC I gave it a good shove to get it on then its held in place with the jubilee clip.
ETA2: In my chim the filter fits into a bracket that bolts into the top side of the nosecone. I didnt do that up until last but I do recall having to bugger about with the pipe a bit to get it to the right length/fit.
I found I needed to soak the end of the hose in really hot water for a few mins before I could get it to easily slide onto the metal joint piece.
ETA : dont recall the plenum end being loose at all, IIRC I gave it a good shove to get it on then its held in place with the jubilee clip.
ETA2: In my chim the filter fits into a bracket that bolts into the top side of the nosecone. I didnt do that up until last but I do recall having to bugger about with the pipe a bit to get it to the right length/fit.
Edited by bigdods on Sunday 19th June 16:18
TV8 said:
gavgavgav said:
I had exactly the same, but I just left it as it is. The new tubes are very strong, and the AFM has been happy for years as your picture shows.
By this do you mean not bolted to the inner wing?I fitted the elbow yesterday and very pleased with it. The clip tightens down nicely and speaking with Tim since my last post, it is larger to accomodate larger plenums.
As for the long pipe. With a bit of a hangover and the sun yesterday, I didnt bother fitting the long pipe into the nose - it looks very awkward and the existing one is in good condition...
Not sure if it is my imagination or not, but the car seems to drive better at lower revs and is ok to drive at 30 in top at least the heat the last two days. It used to prefer 3rd at that speed.
Putting the old over the top of the new, it is not hard to imagine a better air delivery into the plenum, which can only be a good thing.
As for the long pipe. With a bit of a hangover and the sun yesterday, I didnt bother fitting the long pipe into the nose - it looks very awkward and the existing one is in good condition...
Not sure if it is my imagination or not, but the car seems to drive better at lower revs and is ok to drive at 30 in top at least the heat the last two days. It used to prefer 3rd at that speed.
Putting the old over the top of the new, it is not hard to imagine a better air delivery into the plenum, which can only be a good thing.
I fitted mine last month, the elbow was fairly straightforward, but the AFM to air filter install is a b
h of a job.
I had to grind the "through the bulkhead" hole bigger with my dremel to get the steel sleeve through. tightening down the jubilee clip was also a nightmare, ended up using a socket and a universal joint with my small ratchet to reach in and tighten it down.
Be careful tightening the jubilee clip down on to the AFM inlet as it is soft steel and can buckle. I used a bead of silicon sealent to ensure it was airtight.
Other than that, the car felt slightly more tractable through the rev range, though might be a placeabo effect.
h of a job.I had to grind the "through the bulkhead" hole bigger with my dremel to get the steel sleeve through. tightening down the jubilee clip was also a nightmare, ended up using a socket and a universal joint with my small ratchet to reach in and tighten it down.
Be careful tightening the jubilee clip down on to the AFM inlet as it is soft steel and can buckle. I used a bead of silicon sealent to ensure it was airtight.
Other than that, the car felt slightly more tractable through the rev range, though might be a placeabo effect.
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