p1mark

I would have thought that if you have the money for the up pipe and downpipe (and the rest of the supporting mods) the GT30 would be the one Daz.

I have driven Bob Rawles STi5 and Chris Bucklers WR1's with the RCM hybrid (both at about 490 bhp) and they are very impressive though.

No expert but i *think* the turbo dynamics item is very similiar to the RCM hybrid. Not seen many people using it really.

dazdavies

iTrader: (22)

Hi Steve,

Thanks for the input. Can you give me an idea of how the car is to drive. ie is it laggy? What rpm does it hit 1bar for instance. What boost are you running and also what bhp/ and ft/lbs of torque you have. Also if you're near to Doncaster I wouldnt mind you taking me up the road in it

Also what version of the GT30R is it?

Cheers
Daz

P20SPD

iTrader: (1)

You will note he says "for" not "on"

Its still in my cupboard

Jolly Green Monster

iTrader: (4)

GT30R vote here!

Talk to Mark @ Lateral regarding Turbos..

Simon

ZEN Performance

WRC car has around 450ftlb of torque, and F1 car less than 300, I don't think anyone will argue about which is faster.

Longer stroke also means greater torque for the same pressure.

Larger bore also means greater force for the same pressure.

Power = PLAN

p1mark

I like that! great advice in 2 words that i and others would use 100's of words for and still not be as effective

stevebt

iTrader: (8)

yes steven's right i still havent picked it up from him yet, i still want to have some fun with my hybrid twin scroll turbo 1st i will add the garret later on this year once im bored with the power of the twin scroll

dazdavies

iTrader: (22)

So you can't really give comment then until you've tried it

stevebt

iTrader: (8)

but you didnt ask how it would perform you asked which turbo should you pick i always wanted to try the direct fit garret but when i seen bobs car only made 420lbs it sort of put me off it as its not much more lbs than what my hybrid twin scroll is capable of

ZEN Performance

True, but power is also Pressure x Length x Area x N

Where length is offset from pivot (crank throw, or stroke /2) and N is the rate of work, in this case in radians per second. Answer will be in KW if SI values are used, imperial units will require the usual "imperial fudge factor" to be added (fudge is dimensionless but otherwise sweet and tasty).

David_Wallis

FPMSL.

dazdavies

iTrader: (22)

Constructive and useful... Not

p1mark

Homemade WRX

the bore and stroke I will agree with, but the dynamic pressure of the 2.0L liter is much much much greater than that of the F1 car...hints the torque...
now comparing the two in a race is a rediculous considering we are discussing engines alone...put them on the same platform, weight, downforce, suspension and especially gearing (makes up the F1's torque) and the WRC powered car would win hands down...
so many people forget gearing is a torque multiplier

dazdavies

iTrader: (22)

Just a quick update,

The engine is now built. I am waiting for some insulating manifold spacers, and new fuel rails to arrive (with -6 fittings) then the freshly painted (samco blue) inlet manifold can go on. The repaired 6 speed gearbox arrives next week so hopefully lots of progress over the bank holiday.

Daz

Daniel-S

Nice one mate

fuz

is the rumour true that honda are building a rally car for button to drive?

osterley

I have the Turbo Dynamics 321T on mine I think - its very similar to the one that RCM do.

It should be ok for the 450bhp. I got 455 (395lbs) at G Force recently and need to do a few more tweaks to the set up

It is laggy, but then I would expect this on a 2 litre. Doesnt start spooling until past 4000rpm

I would expect it to struggle to achieve over 500bhp, unless I run race fuel. Its currently mapped on Tesco 99, with a bottle of NF every fill up and 1.5 litres of Methanol, currently mapped for 1.8 Bar, and with 50/50 Water injection methanol set up. Will probably need to increase the Methanol mixture to 4 litres or so to get the power up a bit more - needs leaning out a little....

Most of the rest of my mods are very similar to yours

Your welcome to have a go any time - although I live in West London......

and mines a 2 litre classic

osterley

Andy
Maybe he needs it - wish Honda would get their act together...... they need to do this to justify the ridiculous amounts of money they are paying to Jenson (unjustifiable wages at the moment thats for sure)

dazdavies

iTrader: (22)

I've decided to go for the rotated GT30R external wastegate setup on mine.
Going to go for the smallest of the variants as mine too is a 2.0L classic.
What injectors are you running?

osterley

Nismo 740's
No issues at all
The Injectors will be fine for the 500BHP I want (would be nice and will be achievable as my spec is also very similar to Bob Rawles) on my 2 litre classic - and I want and should have reliability

Dont think I'd go any smaller. Tickover is fine on these also - 850's are a bit more of a pain at idle

(Of course with an uprated FPR)

P20SPD

iTrader: (1)

daz as seen and heard mine idle with the Lateral modified Subaru 550cc injectors, which are effectively 900cc injectors at 4bar

David_Wallis

incidently I think that may be the key difference between the drivibilty of our cars.

P20SPD

iTrader: (1)

I think your probably right David, the 850's were just too "lumpy"

dazdavies

iTrader: (22)

anyone want to swap my 850's for some 740's lol

dazdavies

iTrader: (22)

Quick update and a couple of pics.

My fuel rails and inlet manifold insulators have arrived.

Painted the inlet manifold too.

Also picked my gearbox up tonight so that the weekend's itinary sorted

Here's some pics:


http://www.scoob.co.uk/rebuild/fuelrails.jpg

http://www.scoob.co.uk/rebuild/inlet...ndfuelrail.jpg

http://www.scoob.co.uk/rebuild/insulators.jpg

P20SPD

iTrader: (1)

dazdavies

iTrader: (22)

It's been a busy weekend for me.
Went to the Soccer aid final at old Trafford on Saturday.
Saturday, sunday and monday were spent on the car.

I picked my freshly rebuilt 6 speed gear box up on Friday night so that was the major job for the weekend.

Decided to give it a coat of paint to match the engine block.

http://www.scoob.co.uk/rebuild/sixspeedblack1.jpg

http://www.scoob.co.uk/rebuild/sixspeedblack2.jpg

Was bloody hard work on my own without a sodding ramp or two post lift.

So with axle stands a trolley jack and lots of hard work I got the bugger on.

Whilst I was underneath the car I decided to replace my 2.5in TSL decat exhaust system with a much nicer looking and far better quality 3in Buddy Club Racing Spec System.

http://www.scoob.co.uk/rebuild/buddyclub.jpg

http://www.scoob.co.uk/rebuild/buddyclubplate.jpg

http://www.scoob.co.uk/rebuild/buddyclubrear.jpg

http://www.scoob.co.uk/rebuild/buddyclubside.jpg


http://www.scoob.co.uk/rebuild/buddyclubrearsection.jpg

So if anyone wants a TSL firestorm Back Box and a TSL group A decat Centre section the price of a SX fuel pressure regulator will ensure its yours.
http://www.scoob.co.uk/rebuild/firestorm.jpg
(shameless plug over)

Next weekend should see the engine going in providing I get a few bits and pieces sorted first.

Daz

911

God, those 6 speeders are LARGE!
Hope your back will be ok tomorrow...
Graham

ZEN Performance

No, people don't forget, that's the whole point of high revving engines!

Acceleration at any speed greater than zero is a function of power. If the gearing of the two engines in question was the same, and it was suitable for the F1 engine the F1 powered car would win hands down. Gearing is a torque multiplier yes, but not a power multiplier.

Put it this way, I can generate about 900ftlb of torque with a 6foot lever. But no gearing on earth is going to make me accelerate faster than an f1 car for any time or distance worth worrying about.

The original question was one of increasing the capacity of an engine, which is not simply a matter of pressure.