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350Matt
3,252 posts
148 months
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Thats a pretty interesting intake
What length intake runners have you gone for?
Also you might want to consider a communication tube between the two plenums as something to try
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jwoffshore
318 posts
123 months
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I was thinking the same thing about the intake. Looks very nicely made. Is there enough volume in each plenum? Just asking the question, not trying to say if there is or is not. What heads did you use in the end, given the original topic?
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Else
Original Poster
613 posts
107 months
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Matt, The runners are approx 7" from the back of the valve to the lip of the bellmouth.    You can just see the link tube, -10, at the back of the plenums in this picture.  Jonathan, Rob at V8D sold me the heads, he explained at the time how the intake should be designed which i have stuck to it as near as i could. Andy
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Else
Original Poster
613 posts
107 months
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Finished the air filter housing pipework install today. Very pleased with it  Just got to tweak the mapping. There's a guy local to me that knows a lot about mapping Motec ECUs apparently so I am going to contact him to see what he can do for mine. Then get the geo set up professionally and I'm done.  By the way, I can't believe nobody wants my old inlet manifold and twin plenum setup, it was the nuts. Have to sell it cos it won't fit my new heads 
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Else
Original Poster
613 posts
107 months
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Need a bit of advice: I now have an oil catch tank instead of venting the crankcase into the inlet but the little foam filter at the back of the nearside rocker cover is pushing out a little bit of oil. I can pipe this into the catch tank as well but will this cause any problems?
I realise that I probably have positive crankcase pressure now instead of negative as before but will this cause any damage to seals or gaskets?
Thanks Andy
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slideways
2,590 posts
90 months
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Else said: Need a bit of advice: I now have an oil catch tank instead of venting the crankcase into the inlet but the little foam filter at the back of the nearside rocker cover is pushing out a little bit of oil. I can pipe this into the catch tank as well but will this cause any problems?
I realise that I probably have positive crankcase pressure now instead of negative as before but will this cause any damage to seals or gaskets?
Thanks Andy I had this same issue after my twin turbo install, in fact I had a major oil leak out of the valley, I disconnected the pipe to the catch tank and added another flame trap in place of the oil filler cap and vent boths sides to atmosphere the problem went away immediately,
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carsy
1,270 posts
34 months
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That looks like a great piece of work. Be interesting to see what gains it gives.
What size RV8 have you got and what ECU have you gone for.
Very nice indeed. Job to be proud of.
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900T-R
18,560 posts
126 months
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robrover said: I think the later post 1976 SD1 Rover heads flowed about 148cfm at the same lift, with Stage 4 Rover heads around 181.
I believe Merlin F85 heads can be maxed out to flow about 185 cfm. What - that doesn't sound worth the hassle of entirely new castings, at all?
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ChimpofDarkness
3,230 posts
48 months
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Else said: By the way, I can't believe nobody wants my old inlet manifold and twin plenum setup, it was the nuts. Have to sell it cos it won't fit my new heads Wish I could afford it Andy  Hope to see you and your car at the Croxley show on August 1st? Dave.
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rev-erend
17,903 posts
153 months
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If you have a oil vent pipe from each rocker cover to to catch tank then you can just block the original oil breather on the back of the3 rocker cover.
Make sure the oil vent tank is large .. I bought a small one and its pretty worthless.
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Else
Original Poster
613 posts
107 months
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Ian, it's a 5.2 built by V8D and it's running a self installed Motec ECU
Andy
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Else
Original Poster
613 posts
107 months
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Make me a sensible offer Dave, I can always say no.
Andy
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Kokkolanpoika
44 posts
20 months
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Any update?
Are those heads V8D/Vizard heads? Look like they have been welded seriously..
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blitzracing
3,287 posts
89 months
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A friend of mine has purchased a pair of the Merlin heads to fit a 5ltr motor going into his Ginetta (the thought terrify me- anything over about 200 bhp is really to much for the chassis)- but anyway here a photo of the inlet ports, any ideas what the infill in the corner is for? Its going to produce a nasty little step when it butts up against the manifold? 
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Else
Original Poster
613 posts
107 months
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Sorry cant help, didn't go the Merlin route in the end, my heads are modified Rover heads from V8D.
Andy
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Else
Original Poster
613 posts
107 months
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Kokkolanpoika said: Any update?
Are those heads V8D/Vizard heads? Look like they have been welded seriously.. Hi Timo, yes and yes. Andy
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griffdude
732 posts
117 months
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davep
416 posts
153 months
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griffdude said: Nice heads griffdude. Did you go for the Mk1 or Mk2 variant?
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Else
Original Poster
613 posts
107 months
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griffdude said: Nice mate, what size are the valves? Andy
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GTRene
7,762 posts
93 months
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those are some real good looking heads, pretty big valve's and big ports.
it can breath very well me thinks.
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