Factory A31/c33 Turbo Vs R32 Turbo

[Nic_A31]

Got to take my Cefiro out on the weekend and have a play with the factory turbo Laurel setup.

Alot different to R32 turbo's IMO.

Despite no BOV, close to zero flutter/surge in gear shifts (somehow)

Turbo starts singing at 2500rpm and is on 10 PSI just before 4000rpm, the sound is completely different.

Vids to come.

But for now, I taken pics of difference.

A31/C33 use a 16V - 10

R32s use a 16V 9

Everything else appears to be the same.

Different number on the wastegate actuators from memory. Exhaust side exactly the same, housings, wheels, etc all the same.

[Dan_J]

was looking at my rpms/boost clearly yesterday and if i full throttle it hits 10psi at 4k(r33 s2 turbo)

you stated 16v9 is r32, i've got a spare 1993 rb20 turbo thats "16v" and no other markings on it

so 16v 10-9 might be a variant between the 1988-1992 a31/c33

ref pic( not mine just a pic off sau)

Edited December 8, 2010 by Dan_J

[Nic_A31]

Maybe my 16v 9 is the black sheep then? Even under hard accel it'd do f**k all before 4k.....anyone else got a 9 or 10?

[Dan_J]

maybe thats just a tired engine with a sensor or 2 not working... unless you wanna bolt up the 16v9 to the current engine and test it out

[Mr Eps]

hmm - nah sorry guys i'm with nic on this one...

this would explain my cefiro DE+T setup how i was on full boost at like...

0.000001 of an RPM lol

Nic knows what i'm talking about... his whole face lit up. hahah

[Dan_J]

lol. nic didnt even mention de+t

yes we were thinking thats its a det+t, how does one prove that if all turbo liquid cooling holes are drilled/tapped correctly?

[Nic_A31]

Nah this one isnt a DE+T. Factory turbo auto halfcut. Atleast I don't think it is. The KMS are mismatched to the dash, possible they blew the long motor and replaced it, keeping the C33 gear like turbo, pipework, etc. ..but doesn't feel same as Rowans. Rowans had lots of torque and spooled up even earlier and quicker (start 2000 - full before 3000)

Dan, what turbo do you currently have fitted?

The pic with 16V and no other markings seems to have same type of fins. (straight, closer together)

If the fins are different between the two you have, try both turbo's. I'll do the same.

The motor in the other Ceffy was running ok but the actuator was sometimes a bit of a joker. Trying to open up at idle, not opening up at all, jamming open, etc.

Edited December 8, 2010 by Nic_A31

[Dan_J]

was looking at my rpms/boost clearly yesterday and if i full throttle it hits 10psi at 4k(r33 s2 turbo)

you stated 16v9 is r32, i've got a spare 1993 rb20 turbo thats "16v" and no other markings on it

so 16v 10-9 might be a variant between the 1988-1992 a31/c33

ref pic( not mine just a pic off sau)

also no can do bout the turbo swap on mine as its my daily, id only swap it if the current one was dead or if i upgrade/ get a newer + melbs summer rain + no car shed

Edited December 8, 2010 by Dan_J

[Nic_A31]

Something definately up here.

Fixed my exhaust leak....it sounds less like a blower and more like a turbo and response is again even quicker.

Light accel it'll stay off boost whole way through, under mid to heavy load it'll start spooling at 2000-2200 and tonight it regularly saw 10PSI at 3000rpm.

Still kicks in a tad later than Rowan's old DE+T (although that did have other mods helping it out) but see's full boost around same revs. Still doesnt feel like DE+T torque curve either.

Vids to come.

(Was having a hard time trying to get boost gauge and tacho inside frame, and drive without crashing - gotta find a passenger )

Edited December 16, 2010 by Nic_A31

[Mr Eps]

what intercooler are you wearing mister??? get an R34 SMIC

i didn't have THAT many mods... just turbo back / dodgy K&N filter

in case you're unaware - R34 SMIC goes straight up - no custom work!

(and it's a HUGE smic)

[toffy]

every stock 20 i ever owned spooled about 2krpm full boost by 3 , i only ever drove one that was about 500rpm later , but i suspected a tired motor (and years of 14psi all day every day) , personally , a rb20 ceff/r32 stock feels stronger than a equivalently stock rb25 r33 by seat of pants dyno

[Nic_A31]

Weird how everyone has different experiences with turbo's .....

All stock at the moment for me. K+N pod filter with a decent amount of cold air, apart from that she's all stock, even the exhaust.

Keen to see how mine'll go with a 3" turbo back and a manual boost controller.

Last night it also peaked at 11-12 PSI a couple of times for some reason. Couldn't con it into doing it again...I think 3 times it hit 12 then slowly dropped to 10 almost straight away.

[works 510]

I was under the impression that the ceff/lozza had the same turbo as the Redtop R31, reasoning why it spooled up sp early.

I have a redtop turbo somewhere, will hunt it down and post results.