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

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

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Else

Original Poster:

781 posts

198 months

Monday 20th April 2015
quotequote all
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

phazed

19,272 posts

164 months

Monday 20th April 2015
quotequote all
Else said:
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
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.

Else

Original Poster:

781 posts

198 months

Monday 20th April 2015
quotequote all
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?

phazed

19,272 posts

164 months

Monday 20th April 2015
quotequote all
Else said:
Mmm, PITA, lot of work, will that increase the numbers or just move them up the rev range?
Don't know.

As you say, a lot of work for an unknown.

As is I bettered my time on the drag strip by nearly 2/10s of a second.

Car also feels mega fast on the road as the midrange is so awesome, (hate that word but it is!).

MPoxon

5,277 posts

133 months

Monday 20th April 2015
quotequote all
Nice graph there Andrew, what is the spec of the engine?

Else

Original Poster:

781 posts

198 months

Monday 20th April 2015
quotequote all
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.


MPoxon

5,277 posts

133 months

Monday 20th April 2015
quotequote all
Blimey 2007 this thread started, glad you finally got there. Looks like a good result as well. thumbup

Else

Original Poster:

781 posts

198 months

Sunday 26th April 2015
quotequote all
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.


Kokkolanpoika

159 posts

111 months

Monday 27th April 2015
quotequote all
What is your compression ratio?

In my mind your power is on the low side.. My 5.2l give +20hp more and lot of smaller valve´s..

Is your valve´s really 50/42mm?

Else

Original Poster:

781 posts

198 months

Monday 27th April 2015
quotequote all
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

Original Poster:

781 posts

198 months

Monday 27th April 2015
quotequote all
Yes valves sizes are as posted

ivanhoew

881 posts

201 months

Thursday 30th April 2015
quotequote all
Else ,

have you ever measured the inlet vacuum at each cylinder on the dyno ? i wonder whether the plenum diameter is restricting the rear cylinders . a barb on each runner conected to a well damped gauge might show if this is happening at high rpm.

just a thought,might be nonsense.

regards
robert.

spitfire4v8

3,441 posts

141 months

Thursday 30th April 2015
quotequote all
^^ I think that's a very good idea .. I'm not a fan of the twin plenum that's being used (although it is beautifully made), but I think the design was suggested by a well respected v8 engine tuner. The more usual design for a plenum that feeds all 4 cylinders more evenly would be to have a reducing volume from front to rear, and a large total volume to slow the air down for pressure recovery to happen. I can't see that happening in the OP's plenum, but I'll keep an open mind as I haven't done any specific testing on that, it's just what's posted around on the web about plenum designs.

ivanhoew

881 posts

201 months

Thursday 30th April 2015
quotequote all
yup spitfire , i like em big ..






robert.

Boosted LS1

19,469 posts

220 months

Thursday 30th April 2015
quotequote all
^ So do I. With chargecoolers. :-)


ivanhoew

881 posts

201 months

Thursday 30th April 2015
quotequote all
nice!


i went intercooler on mine..


Boosted LS1

19,469 posts

220 months

Thursday 30th April 2015
quotequote all
Where's your engine fella, I can see a varta battery. :-)

ivanhoew

881 posts

201 months

Friday 1st May 2015
quotequote all
Boosted LS1 said:
Where's your engine fella, I can see a varta battery. :-)
i know! its only a dinky 3.5,,, hardly pull the S off a R P.frown

rev-erend

20,653 posts

244 months

Friday 1st May 2015
quotequote all
A lithium battery would look nice in there. You would be able to see the engine then.

ivanhoew

881 posts

201 months

Friday 1st May 2015
quotequote all
rev-erend said:
A lithium battery would look nice in there. You would be able to see the engine then.
orrr , get a slighlty bigger one ,and apply for hybrid status?