Little turbo for the megane

[RSTuning]

 

[Tutuur]

Looks like pretty high compression! And how much duration do those cams have? Lobes look pretty big

 

[Dr HMS Derv Destroyer]

That crank is a work of art. Where's the fancy pictures of porting

 

[RSTuning]

Looks like pretty high compression! And how much duration do those cams have? Lobes look pretty big

It's supposed to be 9.5 taking into account the head etc.

They are 295 degree and 13mm lift IIRC

 

[Tutuur]

Stunning!

 

[RSTuning]

That crank is a work of art. Where's the fancy pictures of porting

 

[RSTuning]

The valves are 2.7mm bigger than the stock 250 on the intake and 1.5mm on the exhaust

 

[Gray]

Certainly coming together now, Paul!

I'll pop by when I am working in Leeds next to have a look at it

 

[BIGASH]

The valves are 2.7mm bigger than the stock 250 on the intake and 1.5mm on the exhaust

Nice 84mm pistons? To allow enough clearance for the bigger valves?

 

[Chip-mk1]

Looking good, certainly should make some big numbers

 

[Dr HMS Derv Destroyer]

Jesus wept! Don't think there much more room for even bigger valves.

Might of missed it but are you running two banks of injectors?

 

[Chip-mk1]

Jesus wept! Don't think there much more room for even bigger valves.

Might of missed it but are you running two banks of injectors?

You do get to the stage where going bigger doesnt help anymore as the outside ends up so shrouded that airflow cant escape all around the valve etc, but I am sure Paul knows what he is doing, plus on a pent roof the further they open the more they move to the centre and hence away from shrouding so its more during the ramp angles only that its an issue.

 

[RSTuning]

Getting there Gray yes.

It's just on 83mm pistons, need the wall thickness to try stop the block cracking!

Fuel wise I have a set of 2400cc Siemens but might need to add some other injectors too if I go down the e85 route

 

[RSTuning]

Dry sump mock up build

 

[Chi]

saw this on FB. . I don't get it but it looks great

 

[Matt Cup]

Had a little peak of this on sat whilst my bro was gettin his R26 mapped. Immense just about sums it up.

 

[Chip-mk1]

Dry sump mock up build
View attachment 107862

Are you intending to stick with the ribbed belt or when you get the pulleys remade to suit the RPM you are revving to (iirc you are going for about 10K and that looks like a formula renault one that I assume is therefore geared for abotu 8K so I assume you need to change them to avoid over speeding it) are you going to swap to a tooth belt or are you going to stick with the ribbed one?

 

[RSTuning]

Suck it and see!

I think we'll be ok but who knows!

 

[Mr R.]

saw this on FB. . I don't get it but it looks great

The engine oil is not kept in the engines sump, its kept in a tank somewhere in the car.

 

[Chi]

The engine oil is not kept in the engines sump, its kept in a tank somewhere in the car.

cheers Scott, why

 

[BoatNonce]

To stop the oil sloshing away from the oil pump and starving it.

 

[Chi]

Nice one

 

[r0ss172]

You can hold a bigger volume of oil which I believe aids keeping temperatures down, and because the sump isn't there like a conventional wet oil system, you can mount the engine lower for a better centre of gravity. Also, excess oil can get on the crank and cause a drop on power.

 

[Chi]

Even better cheers bud..

 

[NorthloopCup]

RSTuning are they high tensile cap head bolts for the main caps? If so what grade? 10.9 12.9?

 

[Mr R.]

Even better cheers bud..

Also a dry sump pump sucks any vapour pressure out of the engine block, this means that there is no resistance for the crank/pistons/rods to rotate which in turn will make the engine rev faster (up and down)

 

[RSTuning]

@RSTuning are they high tensile cap head bolts for the main caps? If so what grade? 10.9 12.9?

They are 12.9

personally I think it needs a girdle too but they seem to think it will be fine.

 

[ThomasBrentnall]

Engine p**n.

 

[Tutuur]

Do you reckon these will be beefier than arp studs and nuts?

 

[RSTuning]

Probably similar, the reason they used these is because ARP's were custom order for that size

 

[MicKPM]

That dry sump setup looks awesome Paul, the entire car is going to be crazy.

 

[Gray]

This makes my engine build look stupidly basic LOL.

 

[NorthloopCup]

They are 12.9

personally I think it needs a girdle too but they seem to think it will be fine.

Are they the same thread diameter to the standard main bolts then? Or have they been time serted to a bigger size?

 

[RSTuning]

Are they the same thread diameter to the standard main bolts then? Or have they been time serted to a bigger size?

No they are bigger.

 

[MonkeyKnifeFight]

Looking forward to seeing how this build pans out.

 

[RSTuning]

It's been a while but there's a bit of progress at last!


Flywheel (thanks scoff), triple plate clutch and crank back from balancing so i can build the engine.

Most of the fuel system parts are on the way and suspension is been designed by KW as we speak.

 

[RSTuning]

Spyshot photo of me building the engine.

It's all together now apart from the sump, cams are dialled in correctly and no valve to piston which is a bonus. The lift and duration is quite a lot!

It was fun to time up as the crank has not been made with the hole for the timing pin and there was no webbing there to drill one, thanks Farndon!

 

[Chi]

This is going to be EPIC!

 

[BIGASH]

Awesome mate!

I did wonder how to time up the engines with the forged cranks I'd looked at

 

[Dan@SJM]

I spy a F4R7xx block, does that mean your running an 02m conversion?