“Merlin F85” heads for the Rover V8 from Real Steel

[Else]

leerdam23 said:

Else said:

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

Bump... What became of this?? Anyone know?

Still in the development phase, i'm a serial tinkerer

[Else]

Hi all, didn't quite make my target 400bhp & 400lbs/ft, got to 373bhp & 395ft/lbs on Joolz dyno.

My inlet manifold set up seems to be working well, the throttle bodies are too big though, no increase in power above approx 70% open so I might look to source some 65 or 70mm versions but not desperate to change it cos it drives so nicely. Pulls cleanly from 1000rpm right up to 6000rpm

Next I'm going to redesign the exhaust, make it less restrictive especially where it splits into 2 just before the silencer. Joolz thought that part was a poor design and could be improved. Not sure how I'm going to do it but would like to incorporate a motorised valve so that I can switch between quiet (silenced) and loud (straight through).

Got a couple of annoying oil leaks to try and cure on the engine but Rob is on it, prob leave it till the winter, they're not bad enough to worry about.

Else

[Else]

[Else]

Hi Peter, As you can see the torque rises pretty rapidly at around 2000 rpm and stays fairly level until about 5000rpm which makes for a nice flexible engine on the road. would have been nice to break into the 400 bhp/ft/lbs target but i am happy with it as it is at the moment. Fuel economy is poor at around 15mpg but i am resisting the temptation to play around with the mapping as Joolz made such a good job of it.

Just going to enjoy driving it around for the summer then maybe tinker a bit once winter comes.

Else

[Else]

Thanks Peter,

I'll have to find out what cam Rob fitted, all i know is that its hydraulic.

Andy

[Else]

phazed said:

Mine was an H404, the power was slightly more.

That graph is the solid 404 which is fitted now, it reduced power slightly but increased torque!

I dont know much about cams but i thought going to solid lifters allowed a better top end but yours was reduced?? Confused??

Else

[Else]

phazed said:

Very confused and not at all what I wanted!

One day I might advance the cam by 4 degrees which should move everything up.

BTW, Rob was confused also.

Mmm, PITA, lot of work, will that increase the numbers or just move them up the rev range?

[Else]

Have a look back in this thread, but basically it is a V8D 5.2 with bespoke heads developed by Rob and David Vizard combined with a bespoke inlet manifold and decat exhaust manifolds and Y piece all controlled by a Motec Ecu running coil packs and semi sequential injection.

[Else]

Have a look back in this thread, but basically it is a V8D 5.2 with bespoke heads developed by Rob and David Vizard combined with a bespoke inlet manifold and decat exhaust manifolds and Y piece all controlled by a Motec Ecu running coil packs and semi sequential injection.

[Else]

Hi Timo, I don't know but i can find out. I'll ask the guy that built it and post it on here as soon as i get an answer. Would be interesting to know anyway.

I think i have a fairly mild cam by the way, currently waiting to find out what it is also.

Else

[Else]

Yes valves sizes are as posted

[Else]

Hi Timo, nothing much since the rolling toad session at Joolz place.

I've been tinkering with the cruising and part throttle mapping and have improved the economy and helped the low rpm smoothness. It will pull cleanly from 1000 rpm in 5th gear which is nice when pootling around.

Oil has been leaking from the head gasket on both banks of cylinders which I have put up with until recently. I changed to a higher viscosity oil, went to 20w60 from 10w40 which has reduced the drips on my garage floor considerably. My guess is that the oil is "wicking" through the gasket from the crankcase to the outside where it then runs down the block. I think it is worse on my engine because there is a "pool" of oil sitting at the point where the head meets the block caused because the heads are moved roughly 10mm away from the centre leaving a step. I'm not sure what the best solution will be but I'm sure Rob will sort it out.

Cheers Andy

[Else]

Hello all.

Happy new year.

Thought I’d resurrect this old thread and update it.

I’ve had an Emerald K6 on the shelf for years and finally dcided to fit it over the Christmas holidays to replace the ancient Motec M8.

Its early days yet but just got it running this evening and learning how to map it.

[Else]

Thanks Phazed and Rev-erend, I've used Jools a few times in the past and been very happy with the result. I am only going to map it enough to get it to him or Dave Walker.

Straight away it starts much more readily. Just got to get the Lambda working before I get much further.