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Else
Original Poster
613 posts
107 months
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Anybody tried them? how much better are they than stock modified ones? BHP or Flow figures?
Any info or advice would be appreciated
Andy
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Else
Original Poster
613 posts
107 months
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I guess nobody here has tried them then. 
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Boosted LS1
13,450 posts
129 months
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Have you asked over on the v8 forums? I think there have been delays with these heads so there won't be many people with experience of them.
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v8 racing
1,977 posts
120 months
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Else said: Anybody tried them? how much better are they than stock modified ones? BHP or Flow figures?
Any info or advice would be appreciated
Andy Andy give me a shout on monday if you are looking for some stonking rover heads, i have a set that you may like? Rob
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Boosted LS1
13,450 posts
129 months
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v8 racing said: Else said: Anybody tried them? how much better are they than stock modified ones? BHP or Flow figures?
Any info or advice would be appreciated
Andy Andy give me a shout on monday if you are looking for some stonking rover heads, i have a set that you may like? Rob Oooh sounds intriguing, can I have em 
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v8 racing
1,977 posts
120 months
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Mike why on earth would you want rover heads anymore?? no seriously these are the ones we did with david vizard, i really really dont want to sell them as there is nothing else that comes close to them but other projects and other halfs needs amust!
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K4000JB
186 posts
78 months
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v8 racing said: Else said: Anybody tried them? how much better are they than stock modified ones? BHP or Flow figures?
Any info or advice would be appreciated
Andy Andy give me a shout on monday if you are looking for some stonking rover heads, i have a set that you may like? Rob can i be second in line if they will suit my application pretty please 
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Boosted LS1
13,450 posts
129 months
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v8 racing said: Mike why on earth would you want rover heads anymore?? no seriously these are the ones we did with david vizard, i really really dont want to sell them as there is nothing else that comes close to them but other projects and other halfs needs amust! I don't need them Rob but I guessed they would be your 'good uns'. I'd like to have them just to say I'd got them but as I haven't a rv8 that would be a luxury. Are you able to post any pics?
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ihatesissycars
947 posts
71 months
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I had some, the first pair available in fact! They looked great sat on the shelf but I then went and got myself a porsche and lost interest in v8 bits so sold them on!
They're advertsied as a "street" head. They won't transfom standard motors into fire breathing mental psycho beast but will help power along. They supposed to help give a broad spread of power accross the rev range rather focusing on to or bottom end.
I hear Paul Goodenough is awaiting a set to try and have a play with, his oppinion would be solid and worth seeking out.
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K4000JB
186 posts
78 months
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hi gav
wot happened to yours did the guy that beat me to them get them fitted? anynews on bhp or torque gains?
ant
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ihatesissycars
947 posts
71 months
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Hello!
I don't know yet to be honest. I'll contact him and see what the outcome is.
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Else
Original Poster
613 posts
107 months
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v8 racing said: Else said: Anybody tried them? how much better are they than stock modified ones? BHP or Flow figures?
Any info or advice would be appreciated
Andy Andy give me a shout on monday if you are looking for some stonking rover heads, i have a set that you may like? Rob Hi Rob, I'll call you later today then. Andy
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savagewidearch
11 posts
78 months
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Hi, i work at RPI Engineering.
We put these heads on one of our very mildly modified 4.6 engines.
I have a video on our youtube account (RPIEngineering).
The video is of it on a test bed, i am also putting a video together of the engine in a Range Rover Classic, on the Dyno.
The outcome was-
307.5 bhp at a little over 6000rpm (dont have the graph to hand)
300 lb ft across the whole rev range! From just 2500rpm (where the graph starts). So maybe at even lower rpm?
We are all imprssed with these heads here, and feel it is exactly what is needed for the Rover V8 engine.
We will be building a much higher spec 4.6 with these heads for a Dax Rush and a Morgan +8 and expect much better results.
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Pupp
6,731 posts
141 months
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savagewidearch said: Hi, i work at RPI Engineering.
We put these heads on one of our very mildly modified 4.6 engines.
I have a video on our youtube account (RPIEngineering).
The video is of it on a test bed, i am also putting a video together of the engine in a Range Rover Classic, on the Dyno.
The outcome was-
307.5 bhp at a little over 6000rpm (dont have the graph to hand)
300 lb ft across the whole rev range! From just 2500rpm (where the graph starts). So maybe at even lower rpm?
We are all imprssed with these heads here, and feel it is exactly what is needed for the Rover V8 engine.
We will be building a much higher spec 4.6 with these heads for a Dax Rush and a Morgan +8 and expect much better results. That's interesting... any issues with mounting ancillaries and exhaust manifolds etc? Lots of fabbing needed or plug and play?
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hiltonig
2,173 posts
77 months
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But can I still fit the TVR rocker covers ???? If not I might as well have wildcat jobbies
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350Matt
3,252 posts
148 months
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From what I've read about these heads all of the std components will fit.
However the exhaust ports are raised up in relation to the std position on the head so the exhaust Y piece on TVR's will need some fettling.
Also the inlet manifold need a little porting to get it to match the new inlet port. If I was in the market for new heads these would be my choice I have to say.
Matt
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DonkeyApple
11,992 posts
38 months
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Slight thread resurrection.  Has anyone used Merlin heads and have any feedback?
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Transmitter Man
2,528 posts
93 months
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v8 racing said: Mike why on earth would you want rover heads anymore?? no seriously these are the ones we did with david vizard, i really really dont want to sell them as there is nothing else that comes close to them but other projects and other halfs needs amust! Rob, Would a professionally ported set of Buick heads come close? Phil
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neal1980
1,946 posts
108 months
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Transmitter Man said: Rob,
Would a professionally ported set of Buick heads come close?
Phil +1 I have a set of 300 alloy buick ones here waiting to be modded
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rev-erend
17,903 posts
153 months
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So - has anyone fitted them yet ?
Any impressions or before and after power figures.
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