Wildcat Rover V8 in Mod Griffith chassis

[wildcat600]

Hi Phil
Thanks for info.
wildcat600

[AC Wildcat]

Hi 600,

The roller cam is with hydraulic roller lifters and was supplied by the Wedgeshop, talk to Woody (address as mentioned by Transmitter Man)
I made a typing error as height for the roller cam is .544" which is the max for the blanks they have.
Before the Erson I used a solid Crane 256 camshaft which could be reved upto 7000 RPM.
The roller cam is smooth and gives more power @ 6500 RPM compared to the Crane256 @ 7000 RPM

Valve springs are 1.260" OD, installed height 1.800" max lift .600" @ 1.200" and they came with the Wildcat heads (supplier I believe is PEP) seat pressure of 110 pounds and max lift pressure 325-347 pounds with 7 degrees collet retainers.

Cheers
Rik

[carsy]

I think these roller cams are worthy of further investigation for our motors.

Wonder why the likes of V8D , JE and the likes have never bothered.

[wildcat600]

Hi Rik
Thanks for the photo of where your engine lives and info on your cam.
wildcat600

Edited by wildcat600 on Sunday 21st June 20:53

[AC Wildcat]

Hi 600,

Thanks and let me know if you need some more info to get your engine up and running.
From the pictures it looks like you have the Wildcat engine of Simon Allaway's EspritV8, which was a very fast race car.
Presume your Griffith will be a real fast and mean maschine !

Good luck
Rik

[wildcat600]

Hi Rik
Yes, I have the short motor (Block, Crankshaft, Rods and Pistons)from Simon.
I will be fitting Stage 1 Wildcat heads and Wildcat 45mm (20 degree) throttle bodies.
Simon had Stage 2 Wildcat heads and Wildcat 55mm vertical throttle bodies.
wildcat600

[AC Wildcat]

Hi 600,

You won't be dissapointed as the later stage 1 heads are flowing almost the same as the earlier stage 2 heads!
Does Roland at ACR still sell the Wildcat throttle bodies 45mm ?

Rik

[wildcat600]

Hi Rik
I believe Roland will have 47mm throttle bodies available in the future.
I had Ian sleeve my throttle bodies down to 45mm when I bought them.
I agree the later spec Stage 1 perform as well as the Stage 2 a low valve lift.
From my research an engine built to produce over 500hp naturally aspirated will need a pair of Stage 2 Wildcat Heads.
Also the stage 2 heads are perfect for Forced induction or a Nitrous engine.
wildcat600

[Kokkolanpoika]

Any update?

[LS Cerb]

Hi Timo (Kokkolanpoika)
I have noticed your posts on various forums and you seem to achieve the best results I've seen from a Rover V8 engines. Better than TA & Wildcat heads.
Any chance you could start a thread showing us some of your amazing Cylinder head work based on standard Rover V8 castings?

[MPoxon]

LS Cerb said:

Hi Timo (Kokkolanpoika)
I have noticed your posts on various forums and you seem to achieve the best results I've seen from a Rover V8 engines. Better than TA & Wildcat heads.
Any chance you could start a thread showing us some of your amazing Cylinder head work based on standard Rover V8 castings?

I would be very interested in that as well.

[Quinny]

LS Cerb said:

Hi Timo (Kokkolanpoika)
I have noticed your posts on various forums and you seem to achieve the best results I've seen from a Rover V8 engines. Better than TA & Wildcat heads.
Any chance you could start a thread showing us some of your amazing Cylinder head work based on standard Rover V8 castings?

This would be really interesting to see

[Kokkolanpoika]

I´m only amateur, not expert, so i do not want to start topic. If someone else want, i can chat..

But my head´s wont perform better than TA or wild cats´s..
They are only 100% hand ported by my home. And need lot of work.
My engine will make 36hp less than 5.0 engine with TA heads and wilder camshaft, but my engine make +100Nm more than 5.0 Ta engine..
Those raedings are measured wit STD 85% throat diameter and 3 angle valve seat.. Valve diameter 43mm




Here you can see my new setup. Valve diameter is same 43mm, but valve throat is offset approx 2mm, and approx 89% of the valve size. Valve guide is STD, not offset. All valve seat´s are 100% hand ported, not anymore 3-angle with machine shop/mira will make.. In the pick 38mm exhaust valve is in the inlet side throat. So there is room to flow more than STD 3 angle valve seat.

Exhaust side is also hand ported, sorry poor picture. It has got oval exhaust valve seat/throat, approx 1.2mm ovality make it flow more stable than any STD 3-angle. Because short side radius is mutch better now, almost percect. Also long side is better..

Those port´s will flow approx 30hp more than STD merlin heads. Same merlin head measured with J.Eales, and my friend buy it, then we make measurements..
Those head´s are STD casting, not welded. I have got also welded heads on my garage, but i wont use then now, maybe in future, or sell them?

My target is approx +420-430hp with my new setup. And my friend calculate, it should produse 436hp, but it is over estimated in my mind.

Edited by Kokkolanpoika on Monday 11th January 18:54

[andy43]

This 405 bhp engine just popped up on ebay. I don't know much about Wildcats but it does look rather

[MPoxon]

Kokkolanpoika said:

I´m only amateur, not expert, so i do not want to start topic. If someone else want, i can chat..

But my head´s wont perform better than TA or wild cats´s..
They are only 100% hand ported by my home. And need lot of work.
My engine will make 36hp less than 5.0 engine with TA heads and wilder camshaft, but my engine make +100Nm more than 5.0 Ta engine..
Those raedings are measured wit STD 85% throat diameter and 3 angle valve seat.. Valve diameter 43mm




Here you can see my new setup. Valve diameter is same 43mm, but valve throat is offset approx 2mm, and approx 89% of the valve size. Valve guide is STD, not offset. All valve seat´s are 100% hand ported, not anymore 3-angle with machine shop/mira will make.. In the pick 38mm exhaust valve is in the inlet side throat. So there is room to flow more than STD 3 angle valve seat.

Exhaust side is also hand ported, sorry poor picture. It has got oval exhaust valve seat/throat, approx 1.2mm ovality make it flow more stable than any STD 3-angle. Because short side radius is mutch better now, almost percect. Also long side is better..

Those port´s will flow approx 30hp more than STD merlin heads. Same merlin head measured with J.Eales, and my friend buy it, then we make measurements..
Those head´s are STD casting, not welded. I have got also welded heads on my garage, but i wont use then now, maybe in future, or sell them?

My target is approx +420-430hp with my new setup. And my friend calculate, it should produse 436hp, but it is over estimated in my mind.

That does sound very impressive - what is the spec of the rest of the engine and what ECU are you using?

[rev-erend]

andy43 said:

This 405 bhp engine just popped up on ebay. I don't know much about Wildcats but it does look rather

They don't come up for sale very often.

[DonkeyApple]

Still seems like a huge sum of money for a used engine.

But I wonder if I am just jaded by having a fantastic nearly new 3.5 and seeing that while new they cost £5k but used prices seem lucky to be above £500.

[Kokkolanpoika]

MPoxon said:

That does sound very impressive - what is the spec of the rest of the engine and what ECU are you using?

5.2litre bottom end, bought 2hand from RPI.. Piston fault´s and crank wont turn because rod bolt will hit block oil gallery.. So i rebuild it and make some room for rod´s and block

So i bought set of pistons (QTY4)

It has got now 11.8CR (i want to run 12.5, not sure if head´s will handle that amount of milling anymore?)
Forged steel crank, Manley rods and ross 96mm piston´s.
Ex camshaft is RS M238 (dynoded 394hp)
Next summer 2016? it will run Kent M256
48mm Jenvey throttle bodies, Eales manifold, home ported to suit my head´s
Home made 41.5mm primary pipes, cheap 3£ collector wit 2.5" outlet, just order 2x merge collectors, with 2" outlet. They are weld on item´s, so i have to cut and weld those to get them one piece..
Main pipe is SS 316L 2x 2.35" with X pipe. Also home made.
Now it will run MS3X ECU with 8x ignition coil´s and semi sequential fuel.
Harland sharp roller rockers
7kg steel billet flywheel
Head´s are my own design/ported and 43mm inlet and 38mm exhaust valves..

In my mind this 5.0 ebay wild cat engine is not worth of money.. A lot of people say that wild cats are way to get power.. It is fully disapointment in my mind.. Lot of money and no more than 405hp, you will get same amount of power for rover head´s.. Those valves are way to big.. You do not need over 43-44mm valves to get 450hp..
Like those wizard rover welded head´s here on pistonhead´s.. Only some 370++ hp.. Something is badly wrong those engines.. I do not know what..

[rev-erend]

Kokkolanpoika said:

MPoxon said:

That does sound very impressive - what is the spec of the rest of the engine and what ECU are you using?

5.2litre bottom end, bought 2hand from RPI.. Piston fault´s and crank wont turn because rod bolt will hit block oil gallery.. So i rebuild it and make some room for rod´s and block

So i bought set of pistons (QTY4)

It has got now 11.8CR (i want to run 12.5, not sure if head´s will handle that amount of milling anymore?)
Forged steel crank, Manley rods and ross 96mm piston´s.
Ex camshaft is RS M238 (dynoded 394hp)
Next summer 2016? it will run Kent M256
48mm Jenvey throttle bodies, Eales manifold, home ported to suit my head´s
Home made 41.5mm primary pipes, cheap 3£ collector wit 2.5" outlet, just order 2x merge collectors, with 2" outlet. They are weld on item´s, so i have to cut and weld those to get them one piece..
Main pipe is SS 316L 2x 2.35" with X pipe. Also home made.
Now it will run MS3X ECU with 8x ignition coil´s and semi sequential fuel.
Harland sharp roller rockers
7kg steel billet flywheel
Head´s are my own design/ported and 43mm inlet and 38mm exhaust valves..

In my mind this 5.0 ebay wild cat engine is not worth of money.. A lot of people say that wild cats are way to get power.. It is fully disapointment in my mind.. Lot of money and no more than 405hp, you will get same amount of power for rover head´s.. Those valves are way to big.. You do not need over 43-44mm valves to get 450hp..
Like those wizard rover welded head´s here on pistonhead´s.. Only some 370++ hp.. Something is badly wrong those engines.. I do not know what..

You are being very unfair.

As you well know it takes a lot of effort and money to get over 400bhp out of a RV8.

Just looking at your spec proves that.

If you have managed that with RV8 heads is impressive but its very easy to sprout figures and shout loud.

The nice thing about racers is that when something really works and gives a big advantage. They go very quiet. Maybe why Wildcat stayed in business so long.

[MPoxon]

Kokkolanpoika said:

5.2litre bottom end, bought 2hand from RPI.. Piston fault´s and crank wont turn because rod bolt will hit block oil gallery.. So i rebuild it and make some room for rod´s and block

So i bought set of pistons (QTY4)

It has got now 11.8CR (i want to run 12.5, not sure if head´s will handle that amount of milling anymore?)
Forged steel crank, Manley rods and ross 96mm piston´s.
Ex camshaft is RS M238 (dynoded 394hp)
Next summer 2016? it will run Kent M256
48mm Jenvey throttle bodies, Eales manifold, home ported to suit my head´s
Home made 41.5mm primary pipes, cheap 3£ collector wit 2.5" outlet, just order 2x merge collectors, with 2" outlet. They are weld on item´s, so i have to cut and weld those to get them one piece..
Main pipe is SS 316L 2x 2.35" with X pipe. Also home made.
Now it will run MS3X ECU with 8x ignition coil´s and semi sequential fuel.
Harland sharp roller rockers
7kg steel billet flywheel
Head´s are my own design/ported and 43mm inlet and 38mm exhaust valves..

Thanks for the spec Timo certainly looks like a nice setup. Very interesting for me as I would really like a 400BHP NA rover engine at some point. What is it like to drive around town / in traffic. I assume with the throttle bodies you do not have the usual issues with shunting when running a plenum and an aggressive cam.

Have you got a picture of the throttle body setup?