mechanic28

iTrader: (5)

i am bored and have been thinking!!!is it worth bolting a T4 on a standard c/r 205 block with midly ported head to get 400/420bhp?as the turbo will be working alot less then a T34.63 would say the boost on a T4 would be 20 odd psi for this power??now will this turbo come in with more of a bang then a T34 running 30odd psi to acheive the same power?which would feel faster?be more realiable set up for the above spec?if u get my meaning?

R5FORD

iTrader: (1)

the T4 comes on with a hell of a bang on the 500 and its hitting 15psi. but it will feel alot more laggy mate.

mechanic28

iTrader: (5)

which do u prefer?what power is your motor at 15psi?internals standard etc?

R5FORD

iTrader: (1)

prefer mine mate but my t34 isit exactly the same as yours.. it depends what your after at the end.. do you want a quick car from the get go or one that punches in around 4000rpm..the 500 is loosing 10psi somewhere but its still fast.

Gary F

iTrader: (1)

Do it! I've just done the same and it proper shifts when on boost, and is much nicer to drive imo

mechanic28

iTrader: (5)

whats your spec mate?

Moonstone Steve.

iTrader: (2)

Im going T4, lowish comp, bd14 inlet standard exhaust, cant wait to get it in and run in.

Steve

mechanic28

iTrader: (5)

hmm!my worry is using the T4 on standard c/r with the greater volume of air the T4 produces and the need to rev it higher to get the power!has anyone T4 a standard c/r 205 cossie lump and got a realiable 400-420bhp

Jay,

iTrader: (4)

the blockwill be fine and davecos4x4 has run a t4 on standard comp for ages

Gary F

iTrader: (1)

Totally standard mate and it fucking flys

mechanic28

iTrader: (5)

what boost u running chap?what bhp do ya think she is?

cossie604

iTrader: (2)

What comp is a standard rs500?

Big Will_

If you do decide to do it - you'll need an air injector or other mappable boost controller to allow you to dial out the surge...

T38s and T4s do have a habit of surging as they come on - but other than that, a standard comp engine does make it nice and lively

mechanic28

iTrader: (5)

cool i would get it live mapped how much roughly all in all to map it and have air injectors etc!i think i remember the map is £500?got the head off her at the mo and finding it bloody hard sourcing a genuine coopers O ring head gasket

bigchez

Karl @ NMS advised me that I could change to a T4 and run it at only 24 psi to get the same power as I have now, and the turbo will never let go, unlike a T34.63 which is having its neck wrung. He did say it would come in a bit later, but would power you to the red line.

I do like how mine drives on the T34 though - very little lag really. I like the midrange surge rather than revving the tits off it.

rapidcossie

will feel slower with a T4 IMO.

Mark Shead

I did a stock 500 with Autronic 2 bar boost everything else stock very impressive no surge and around 420+hp.

Mark

Gary F

iTrader: (1)

mines only at 25psi at the moment as I have a volts problem to the ecu, when thats sorted Will at msd's going to reset the boost to 30psi

xr_craig

iTrader: (2)

I was considering this instead of the usual T34 route when i get round to finally upgrading.

What sort of power is yours estimated at then milkman?

MTZ1

iTrader: (1)

sorry for the OT but i've a rs500 turbo for sale, new with 360° bearings and modded for an air restrictor (could make an adapter) http://martin.zellner.at/cossi/rs500/
if anyone is interested: martin@zellner.at

and just 4 info, the turbine wheel of the rs500 turbo is around 5mm bigger than a gt30 wheel and the inducer of the compressor is 1mm bigger (exducer is the same)

pete mcrash

iTrader: (1)

.....can u tell me more........cos people tend to quote the "peak" figure instead of what it holds.........