โ€œMerlin F85โ€ heads for the Rover V8 from Real Steel

โ€œMerlin F85โ€ heads for the Rover V8 from Real Steel

Author
Discussion

griffdude

1,698 posts

215 months

Wednesday 14th November 2012
quotequote all
@davep, after discussion with Rob we decided on the Mk1 version as it's a smaller capacity engine (4.5L).

@Else, measuring with a very unscientific ruler it looks like 43mm inlet & 37mm exhaust.

rev-erend

21,062 posts

251 months

Wednesday 14th November 2012
quotequote all
Dinky .. mine are 47mm and 39.5mm

griffdude

1,698 posts

215 months

Wednesday 14th November 2012
quotequote all
rev-erend said:
Dinky .. mine are 47mm and 39.5mm
Compared to your Wildcat heads, yes no contest. Not even in the same league I'm afraid, but to be fair, the V8D heads weren't in the same price bracket either.

Else

Original Poster:

783 posts

205 months

Wednesday 14th November 2012
quotequote all
griffdude said:
Compared to your Wildcat heads, yes no contest. Not even in the same league I'm afraid, but to be fair, the V8D heads weren't in the same price bracket either.
By my crude measurement mine are 50mm and 42mm.

Apologies all, feels like this is turning into a "mines bigger than yours" contest!

Andy


griffdude

1,698 posts

215 months

Wednesday 14th November 2012
quotequote all
Else said:
By my crude measurement mine are 50mm and 42mm.

Apologies all, feels like this is turning into a "mines bigger than yours" contest!

Andy
Andy

Hmmm, that's interesting. Will have to re-check these dimensions. Are yours the V8D stage IV heads Andy?

jfjfjf2

155 posts

138 months

Wednesday 14th November 2012
quotequote all
Else said:
By my crude measurement mine are 50mm and 42mm.


Andy
How cute, only 50mm. My intake is 51mmtongue out. I'm embarrassed to say my exhaust valves are only 41mmirked.

Julian

MPoxon

5,283 posts

140 months

Wednesday 14th November 2012
quotequote all
That looks fantastic.... what is the spec?

Else

Original Poster:

783 posts

205 months

Thursday 15th November 2012
quotequote all
jfjfjf2 said:
How cute, only 50mm. My intake is 51mmtongue out. I'm embarrassed to say my exhaust valves are only 41mmirked.

Julian
laugh

Wotland

27 posts

170 months

Thursday 15th November 2012
quotequote all
For comparaison TVR Tuscan Challenge heads :

Port sizes : In 1.89"/1.100" Ex 1.535"/1.100".

LARGE R.E.C WAISTED 5/16 STEM UNLEADED VALVES .
HEAD DIA'S = 1.693" INLET. 1.455" EXHAUST
COLSIBRO VALVE GUIDES














Pupp

10,742 posts

239 months

Thursday 15th November 2012
quotequote all
griffdude said:
Andy

Hmmm, that's interesting. Will have to re-check these dimensions. Are yours the V8D stage IV heads Andy?
They'll look good on a 996 Howard ;-)

What you going with cam wise?
Also, have you seen the new JE front cover and pump? Suit yours a treat I'd have thought...

robrover

41 posts

183 months

Tuesday 20th November 2012
quotequote all
I think my Buick 300 heads have 1.75in inlets and 1.5 exhaust valves. The ports are huge, the inlet manifold had to be welded up and opened out because the ports in the heads went up higher than the standard manifold would cover. The Rover inlet manifold gaskets wouldn't go high enough either, so we used P76 ones.

Else

Original Poster:

783 posts

205 months

Sunday 2nd December 2012
quotequote all
Somehow managed to crack three liners so the engine is out again so I thought I'd take a few pics and post them here.









Electric Fairy

2 posts

138 months

Monday 3rd December 2012
quotequote all
Hi All
Been a veiwer and a Chim owner for many years but never posted. So here goes. If Else still looks at this post can you tell me where you got the alloy pipe made up for the twin plenum set-up? Its just what I've been after for my set-up on the Chim. Or failing that if anybody knows of a good fabricator to copy whats in the pic on this post, please let me know.

Else

Original Poster:

783 posts

205 months

Monday 3rd December 2012
quotequote all
Electric Fairy said:
Hi All
Been a veiwer and a Chim owner for many years but never posted. So here goes. If Else still looks at this post can you tell me where you got the alloy pipe made up for the twin plenum set-up? Its just what I've been after for my set-up on the Chim. Or failing that if anybody knows of a good fabricator to copy whats in the pic on this post, please let me know.
Welcome Mate. The guys at ProAlloy did it, top blokes thumbup Google it, theyre based in Haverhill Suffolk.

Andy

Electric Fairy

2 posts

138 months

Monday 3rd December 2012
quotequote all
Thanks for the info, Andy - Will contact them later in the week.
Did you manage to sell your Twin Throttle setup?

Pete

Wotland

27 posts

170 months

Tuesday 4th December 2012
quotequote all
Else said:
Somehow managed to crack three liners so the engine is out again so I thought I'd take a few pics and post them here.








They are Vizard heads which were for sale on Ebay this summer ? smile

Else

Original Poster:

783 posts

205 months

Tuesday 4th December 2012
quotequote all
Electric Fairy said:
Thanks for the info, Andy - Will contact them later in the week.
Did you manage to sell your Twin Throttle setup?

Pete
No mate, I'll try again in the spring.

Andy

Else

Original Poster:

783 posts

205 months

Tuesday 4th December 2012
quotequote all
Wotland said:
They are Vizard heads which were for sale on Ebay this summer ? smile
Not these mate, I've owned them for about 4 years.

Andy

spitfire4v8

3,613 posts

148 months

Tuesday 1st January 2013
quotequote all
Just been looking at those head pics again .. I think the engine's been built back to front hehe those exhaust ports look like they'll flow better as inlet ports than the inlet ports will. Next step might be to have the heads made with the inlet valves and exhaust valves swapped, and the inlet manifolds on the outside of the heads and the exhaust manifolds running down the centre of the vee smile
And I'm only half joking!

v8bloke

255 posts

178 months

Monday 14th January 2013
quotequote all
I have been using the Merlin Heads for a few years. Lost of info inc dyno sheets here. http://www.v8forum.co.uk/forum/viewtopic.php?t=550...