809bhp on the rollers, Sierra Cosworth.

[MADRod]

Went to a RR shootout today, most were saying Power figures were down on what they predicted, lets say i was happy with mine. It made 838bhp on the Dyno so happy with that in the car. Did not run the Nitrous because we only had a short time each.
We will be having a crack at a Topspeed run soon at Brunters & 215mph looks on the cards if all goes well.

[MADRod]

Heres a few picts. The attempt on the Cosworth Topspeed record will take place in February/March 2011. Target figure is 215mph in the confines of Brunters a feat achieved by only 4 road cars.

[MADRod]

Bigfatnath said:

What are the other 4 road cars to crack 215 MADrod?

Just curious...

2 Porsche tuned by ffs
1 Viper
Red Victor

The first 3 are fully trimmed road cars the 4th isnt .

[MADRod]

robsco said:

This is the baby I remember from the days of reading Performance Ford. That turbo is truly and utterly gigantic. Wasn't the car also featured on Fifth Gear once upon a time Rod?

Yes it ran 206mph in the wet against Tiff in his Lotus that managed 176mph. The car was 680bhp + 150 Nitrous so a whole chunk of Power more now.

watch the ending its classic, quote of the year - "To be honest, you got beat fair and square, because there was a geezer out there in a cardigan, he was driving one-handed, doing 206 mile an hour in a white Sierra."

http://www.youtube.com/watch?v=qSVSHtKnzmk

[MADRod]

rhinochopig said:

Please don't take this the wrong way, but why so little power, relatively speaking (without NO2) - what's the limiting factor at the moment, is it a budget thing or an attempt to maintain an element of reliability or drive-ability or are you at the limits of the block?

What a strange thing to say, lets see their 2 litre pump figures .
Are you thinking mine is a competition engine like Simons mine makes 780 on pump & cant make good use of race fuel its not designed to do that. I expect Simon is on 109 or maybe even 120ron you cant compare the two. The trip to the Chinky would be rather noisy in Simons me thinks. Mines used all the time at 2.8bar & is fully trimmed.
Simon Dynoed my engine so i know him well, when you speak to him just ask whos proven Topspeed is faster the EVO or the Cossie .

The YB is ignition limited gasket integrity is the problem. Julian Godfrey leads the way & is at 874bhp with the Tebenham drag engine, his attempts at a reliable 900 are proving difficult.
Mine made 838(780 pump) on Simons Dyno but is circa 850 with the latest mods so we are close to the practical limit.

[MADRod]

sidewaysste said:

Madrod, were you at Trax with Redline this year?

Yes i was.

[MADRod]

Welshbeef said:

I'll make do with my 77bhp/ltr & 123ftlb/ltr.

I can imagine that the transition from 280bhp to 809bhp in 1200rpm is rather entertaining. If you can open the throttle wide open at the 280bhp level isit a case of no matter what gear you are in traction will be lost?

Full boost is about 5k in the car not the 6k it shows on that graph. Think we gain 500bhp in 400rpm or something silly. But we do have traction as the cars been developed along with the engine. It has a 10.5" jag power loc,full beam kit, chassis connectors, coilovers etc.

[MADRod]

Megaflow said:

Rod, a question if I may.

When the RS500's came to an end in the touring car championship, I read an interview with, IIRC, Andy Rouse, who said they were pushing 600bhp back then and going through a clinder block per race.

What has changed in the years since to allow people to run so much more power without such frequent rebuilds?

They were racing with 540bhp had 570bhp in qualifying & there were claims of 600bhp in testing.
The block is the weak link it warps. Today we have Nikasil liners, multi-layer gaskets, improved oil distribution & some many mods done to the block that are secret at this time proved by development. Even today 900bhp is proving difficult which is why we have stopped at 850bhp. The block will also crack around the crank bearings if Power is pushed beyond 900bhp. We cracked a block with a 700bhp engine & a massive 200+ shot of Nitrous.

[MADRod]

Megaflow said:

Rod

Good info. Nikasil liners, are they inserted into the block or a coating of the parent metal bore?

They are inserted & the ones we use are a development from Mountune.

[MADRod]

Tony 1234 said:

BMW had a lot of engines to replace due to Nikasil liners a few years ago, they replaced mine also.

Mountune liners give no problems whatsoever.

[MADRod]

crisisjez said:

Rod, shame you wern't able to run at the last Vmax, it would have been great to see the mighty Cossie at Defcon 1.
215 at Brunters is a fair target, like to try that myself.
Good luck

Totally gutted!!!

The problem should have been avoided. The ECU boost safety limit was removed on the mapping run to avoid boost flutter & the pipe from the wastegate came off allowing uncontrolled boost. Its likely that the GT42 puffed up to 4.5bar for a few glorious seconds blowing the gasket. The pipes are now aeroquip something that should have been done prior to the run. We live & learn ..

[MADRod]

crisisjez said:

Was watching your sighting run and saw the puff, really thought it was smoke so was glad to find out it was water. At least the damage was minimal.
Running that day was....erm...exciting to say the least, grip out of the bottom corner was the main problem (plus the fog)
All in all though a good day and was pleased to post the top speed of the day (206)
You must have your gearing spot on if you are hoping for 215 (Mine will need some work tbo) good luck in the braking zone;)

Gearing is my forte its the real secret of why my car does what it does. Remember taking the Cosworth RWD record years back with 60bhp less power than the previous holder .
Dyno wise we have just about enough power to pull 210 off gas & 215 on.
We are on the ragged edge of the YB block so may be a bit conservative on the Nirous. 215 is the target but 213 will see me retire from pushing the record further. Im past 65 now & getting a bit old for this caper.