RS LOZWORTH

Hi folks,

I was just wondering how fast a t34 turbo should spool at tickover on an escort cosworth?

thanks

LHD220Turbo

iTrader: (4)

not sure i understand the question or why you'd need to know?

the turbo will spin at idle but the speed will be minimal

RS LOZWORTH

just how fast the shaft spins, is it meant to hardly move on tickover?

fuzzy

a t34.48 starts boosting properly at about 1400rpm. a t34.63 was about 2500rpm. ive no idea what speed the shaft on the turbo would be spinning.

RS LOZWORTH

basically i want to know what i should be getting if i hold the shaft on tickover, should it try and spin? Should i be able to spin it faster than it spins?

fuzzy

possibly chopped up fingers is what youll be getting if you try to hold the shaft

Paul_RS

iTrader: (4)

Should that not be 2400rpm and 3500rpm???

fuzzy

no, it was 1400 for the .48. i might be wrong with the .63 as that was much longer ago.

Paul_RS

iTrader: (4)

Well if you have a .63 that spins up by 2500rpm i'll buy it from you :P

Mine has a .63 and is spiking boost by approx 3800rpm

RS LOZWORTH

anyway can some one go and start there cossie and hold the shaft on tickover and tell me what happens! Lol

fuzzy

why do you want to know this anyway?

fuzzy

could it have been 1400 for the .48, 2500 for the .55 and 3500 for the .63?
it was a few years ago now but i remember much prefering the stage 2 .48 as it was much more instant for accelerating from a standstill.

RS LOZWORTH

ive had my turbo re con and re fitted it myself and just want to be sure that its ment to be doing what its doing before i drive it

Paul_RS

iTrader: (4)

i've never been in a .48 or .55 turbod car, so i'm usless with those ones

is the .48 much bigger thana standard 4x4 T3?

fuzzy

im not sure, theres not much physical difference in size between a .48 and a .63. i have both in my shed.

saph4be

i use to make full boost at 3200rpm on my .63

fuzzy

how do you know if its doing what it meant to be doing if you dont know what its meant to do?
drive it. if it boosts and doesnt belch smoke be happy

RS LOZWORTH

i was just sure it was suppose to spool faster on tickover, its turns very slowly, but then i reved it to abou 2k and it spooled fine, its just i always thought they spooled alot faster on tickover

littleknocks

You mean spin? Most will think of spooling as coming on boost I guess, probably why there is so much confusion

It should spin freely at idle

RS LOZWORTH

yeah i mean spin, when idle and i try and spin it more than what its currently spins at its like theres a friction im spinning it into- my explanation is very poor im affraaid

TurboShed

Well, you are trying to pump air into the inlet manifold, there should be some resistance.

tabetha

At tickover it is perfectly normal to be able to stop the turbo spinning by holding the shaft, just pressing on the end will stop it.
My T3/34.48 starts boost at around 1400/1500, and is full boost by about 2600, but mine is a T34 compressor wheel in a T3 housing machined out to size.
tabetha

RS LOZWORTH

nice one pal thats what i wanted to know

Dicko&Vacant

iTrader: (3)

Now that was bloody hard work lol