Mike Rainbird

Dario,
And I hadn't guessed that one....!
LOL
Mike with a "real" 419bhp!

Beef

I suppose I would say this, but has anyone done a sequential twin-turbo conversion on a Cossie. I mean, with a relatively small No.1, and a dustbin sized No.2, you could not only get the same huge power, but also largely remove the power loss you say you get below 4000.

johnfelstead

there was a twin turbo done on a race escort cossie, i think ahmed had something to do with it. I spotted the kit for sale last year so it probably wasnt needed to win races, extra weight etc would make it a bit of a backward step maybe?

Mike Rainbird

Dear Beef,
By "gas", I take it you mean nitros? Cossies and nitros do not mix! A guy had an alleged 370bhp conversion plus 100bhp gas at the "Revs" top speed shoot-out last year. Needless to say it went bang and only recorded 129mph.... (we all said it would!).

Sequential turbos have not been successfull as these are really only for drivability not big BHP and most people who want drivability stick with the smaller turbos and those who want the BHP go for the monster ones...
Mike

Beef

Yes, I did mean Nitro. Re sequential turbos, it's just that I'd have thought that having a small No.1 means it would spool up faster, and at lower revs, meaning that could not only have shedloads of power above 4000, but also have a healthy dollop below that as well as useing the No.1 to pre-spool No.2, therefore getting on full boost even more easily. It was just an idea. Still, if you wanted to get good low-end power, you could have a supercharger with a big turbo. Best of both worlds! (Mad expression)

Mike Rainbird

Dear Wreckleford,
Is there any chance you can advise what tyres the front drive cars use to get these standing quarters, as I have just seen in one of our UK magazines a mad little American Honda Civic with a turbo on and a quoted 270bhp that has done a 12.56 @ 119mph. That is incredible for any road legal car, let alone a front driver....

Incidentaly the flow rate for my injector is 437cm³/min @ 2.7 bar fuel pressure, but as most Cosworth engines run at 3.5 bar static pressure, the flow would then become 497cm³/min @ 3.5 bar...
Regards
Mike

johnfelstead

bugger, i was 6cc out on mikes motor with my calcs. I thought i knew what i was talking about

Mike Rainbird

John,
You obviously do! I was just quoting from Ahmed...
LOL
Mike

darron davis

Mark's thinking of selling the famous RS500, why's that then??????

Maybe he's saving to buy a STI 5 and then he can sort out why these engines expire so frequently.

Getting worried now to hear another one's gone bang and Graham Goode Racing found an aftermarket ECU system fitted to it!!!!!!.

Makes me wonder if anyone can ""SAVE OUR PISTONS"".

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:<HR>Originally posted by Scooby Mania:
<B>Mark Shead, our tuner, has an RS500 that runs 37psi boost as well.

His engine produces 545bhp and 491lb/ft with a 7.3 :1 compression ratio and T4 turbo.

16,000 miles and 11 track days.

Oh and it is possibly for sale if anyone fancies it. It is well very well known car with M.A.Developments plastered all over it!!

Mark says it will be rebuilt again soon for anyone who wants it!

Laters

Ben[/quote]

Wreckleford

Mike and John,

I agree that a lot of the power figures quoted by people with fast cars are unrealistic, but I believe the Eclipses are actually producing some pretty healthy power figures, judging from the 1/4 mile times. There are tons of them in the 11s, street driven.I can post the url of the DSM (Mitsubishi Eclipse, Plymouth Laser, Eagle Talon) 1/4 mile registry if you are interested.

I kind of figured that my injectors had a lot of excess capacity. It is true that the idle and low speed driveability could be better and the fuel economy is **** poor.

Anyway, thanks for the info.

Wreckleford.

Wreckleford

Well the Eclipses setting those times are both FWD and AWD. The FWDs use drag slicks and some of the AWDs do to, but most run regular performance tires. Some use drag radials - road legal treaded tires which are supposed to get sticky when you heat them-up by burning out.

I imagine the Civic setting those times would have been using full drag slicks. Most likely it was completely guted too, even if they claim it is street legal.

The fastest Hondas and Eclipses are in the 9.5 -9.7 second 1/4 mile time region, but these cars are far from being street legal.

Wreckleford

Oh yes, interestingly some of the quick Hondas (10 sec and below) use wheelie bars. Sounds like a dumb idea, but they act as a lever arm to counter the rearward weight transfer, so the cars can maintain traction down the 1/4 mile.

Gadget Gurney

Apparently the weather for Sunday looks quite good.

Probably best to wait till the afternoon when the sun will have warmed the track up.

Lets hope there's a trailing wind not a head wind

Mike.

robski

Mike,

do you have an RS anorak!?

robski

Andrew Dixon

Thought I'd bring this thread back up to the top, as I've experienced my mate's new '347 hp' Cosworth first hand.

It looks in great nick ... or as good as any car can look at night anyway. Didn't find out who the seller was, but I know it wasn't Castle or Turbosystems.

He's had a chance to go through the receipts that came with the car, and the list of modifications the car is thankfully a bit more than he'd originally thought. In fact it read almost exactly like Mike and John's lists! Green injectors, actuator, MAP sensor, ECU, etc. Also sporting a LOUD Mongoose 'Evolution'(?) exhaust, Koni suspension kit, polyurethane bushings, GGR induction kit, LOUD dump valve, etc.

And it feels pretty damn quick!

He didn't really push it much above 4000 rpm due to only having had it for 24 hours and his previous car having being an Astra diesel. Despite that it has a quite incredible amount of urge. The pull in 5th felt <I>almost</I> as strong as my UK Scooby in 3rd!

And then he handed me the keys!

It really does drive like a completely different animal to the Impreza. The steering is heavier and seems to provide less feedback, and the pedals don't feel as directly connected to the 'moving bits'. The gearchange felt a bit odd too ... but anything does after the Scoobies rifle bolt quickshift! Having said that, I'm sure a few hundred miles would have got me feeling a lot more comfortable.

The engine delivers it's power quite differently too. It felt like there was a lot more lag than in the Scoob. And the off-boost / on-boost division is huge. One moment your gradually speeding up, and then KERBLAM all hell breaks loose and the thing launches itself up the road! Accelerating from idle in 2nd the tyres give an audible chirp as the boost came on strong.

The dump valve sounds wicked, but I'm sure it'd drive me nuts when I was in 'normal' mode.

Only problem is a pretty horrible flat spot at around 3250 rpm that manifests itself occasionally. Feels almost as violent as the overboost cutout on the Impreza. It's been suggested that a new set of plugs wouldn't go amiss? Any ideas?

All in all, I'm highly impressed. It's an incredible amount of performance for the money he spent, and it's pretty sickening when you think of how much money it would cost to give a UK Scooby 350 bhp!

Andrew.

[This message has been edited by Andrew Dixon (edited 22-02-2000).]

johnfelstead

andy, you want to try it in 2wd guise, it is masively quicker.

only taken it to 4000RPM, whats up with the bloke, it doesnt wake up till 4000RPM in that spec, sigh

that westfeild turbo is getting closer by the day 270BHP cossy turbo in a westty, oh my gawed