Wastegate chatter, the truth (essay) - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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Dom

Member

Registered: 13th Sep 03
User status: Offline

8th Apr 05 at 20:28

quote:
Originally posted by Drew
gt4 wrc's have an antilag option, the turbos are reported to last around 7000 miles, so no, not really a good opion for road use

aye mate, just read about the GT4s group A WRC celicas

they had the bits fitted, but was an option to switch it on/off on the ECU etc Although only 2500 were made, and tbh i bet its great when its switched on

Member

Registered: 20th May 02
Location: Kent
User status: Offline

8th Apr 05 at 20:28

most ppl that have antolag have a switch for it

Kerry

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Registered: 5th Oct 01
Location: Norwich
User status: Offline

8th Apr 05 at 20:32

jimmy im not being funny but shut the fuck up with your bullshit will ya

_Allan_

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Registered: 24th Mar 04
User status: Offline

8th Apr 05 at 20:33

My wastegate chatters the next morning after a Vindaloo

Kerry

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Registered: 5th Oct 01
Location: Norwich
User status: Offline

8th Apr 05 at 20:34

quote:
Originally posted by VenomTurbo

quote:
Originally posted by Kerry
jimmy im not being funny but shut the fuck up with your bullshit will ya

What's up with ya now?

your so full of google

J da Silva

Member

Registered: 10th Apr 03
Location: The FACTory
User status: Offline

8th Apr 05 at 20:35

Hmmmm.... just because I don't rant and rave in help n mods and try n act superior, means I chat shoot? I'll leave it with ya young un' whilst you struggle with that XE

Kerry

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Registered: 5th Oct 01
Location: Norwich
User status: Offline

8th Apr 05 at 20:38

noones struggling

J da Silva

Member

Registered: 10th Apr 03
Location: The FACTory
User status: Offline

8th Apr 05 at 20:39

That means you've been missinforming people then

Masons/Horse Shoes calls me, see ya through the window

Kerry

Member

Registered: 5th Oct 01
Location: Norwich
User status: Offline

8th Apr 05 at 20:40

quote:
Originally posted by VenomTurbo
That means you've been missinforming people then

Masons/Horse Shoes calls me, see ya through the window

i have not mis informed anyone

i aint the one who talks fucking crap

James R

Member

Registered: 4th Feb 03
Location: 205GTi16/306GTi16
User status: Offline

8th Apr 05 at 20:46

Antilag is good for WRC cars, but isn't really street legal due to flames out the exhaust, don't mean a small pop either, i mean like afterburner stlyee.
It basically retains the same amount of thermal energy to allow the turbo to keep spinning.
The smart option for street cars is to use a shot of nos when you lift off, like 25BHP, just to boost the exhaust gas energy.
As turbos work primarily from heat energy, not from the blowing effect of the exhaust gasses.
Still it's feckign cool to be able to lift of and come back on the power with boost.
It's worth noting it's not to do with extra boost at low rpm's, it's to reduce the lag effect when the turbo is on song and you lift off, get the boost back in and the car surges, it's more a a wall of power waiting for you.

7000miles is a little optimistic for the turbo's life. WRC's trash the turbo after one weekend. and they are only running it on the stages.

Drew

Banned

Registered: 24th Nov 01
Location: County Durham
User status: Offline

8th Apr 05 at 20:49

not at all optimistic

my last turbo lasts 80.000 miles

i would say i use my turbo more that 10% of the time im driving the car

Drew

Banned

Registered: 24th Nov 01
Location: County Durham
User status: Offline

8th Apr 05 at 20:50

ps, wrc rally car is not quite in the same league as a standard gt4 with antilag turned on

James R

Member

Registered: 4th Feb 03
Location: 205GTi16/306GTi16
User status: Offline

8th Apr 05 at 20:56

7000miles is not of effective hard use with ALS turned on.
The EGR's of WRC cars is lower than road cars, they srun in the region of 10-11:1CR's
It's the exhaust valves too that get burnt up by it reducing engine perf.
I'm not saying it's bad, it's planned on a 2L turbo on the brew, but 7k is road 7k, rather than constant abuse.

Drew

Banned

Registered: 24th Nov 01
Location: County Durham
User status: Offline

8th Apr 05 at 20:59

there is only u talking about rally cars, not me

James R

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Registered: 4th Feb 03
Location: 205GTi16/306GTi16
User status: Offline

8th Apr 05 at 21:01

quote:
Originally posted by Drew
there is only u talking about rally cars, not me

I just mean that 7k isn't liek 7k on track, or constant B-road bashing.
if it was then it woul dbe less than 7k

Drew

Banned

Registered: 24th Nov 01
Location: County Durham
User status: Offline

8th Apr 05 at 21:03

but i aint mentioned using antilag on a track, or constant b road bashing

i have mentioned 7k being around how many miles u get per turbo on a gt4 wrc with anti lag turned on

vibrio

Banned

Registered: 28th Feb 01
Location: POAH
User status: Offline

8th Apr 05 at 21:45

old news - the only thing that bothers me is that a wastegate is boost dependant not throttle dependant.

Nismo

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Registered: 12th Sep 02
User status: Offline

8th Apr 05 at 23:53

External Wastegate is the way forward

CorsAsh

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Registered: 19th Apr 02
Location: Munich
User status: Offline

9th Apr 05 at 00:05

quote:
Originally posted by Nismo
External Wastegate is the way forward

Can't have optimal setup for an EW on a roadcar due to it bein illegal for exhaust to vent to atmosphere forward of the backbox... most engines don't develop enough boost to warrant one anyway. You prob already know that tho

Nismo

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Registered: 12th Sep 02
User status: Offline

9th Apr 05 at 00:11

Still makes me sexy wee though

wayne hiscock

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Registered: 20th Jan 01
Location: wiltshire, trowbridge
User status: Offline

9th Apr 05 at 00:24

I Can have chatter or the woosh of a dv

i got woosh

will have chatter soon

James R

Member

Registered: 4th Feb 03
Location: 205GTi16/306GTi16
User status: Offline

9th Apr 05 at 00:46

hmmm 40mm external wastegate. Still waiting for the right engine to use it on.

External wastegates can't be illegal? on a few road cars.

kenzo

Member

Registered: 2nd Oct 04
User status: Offline

9th Apr 05 at 01:38

quote:
Originally posted by Kerry
so to cut a long story short dump valves are bad and u are better with a recirc

And how do u work this one out?

A recirc valve is the exact same as a dump valve. They both relieve the air pressure. The only diff is that the recirc vents the air back into the intake and a DV vents it into the atmosphere.

Mattb

Member

Registered: 2nd Feb 03
Location: Under your sisters bed
User status: Offline

9th Apr 05 at 10:49

compressor stall

vibrio

Banned

Registered: 28th Feb 01
Location: POAH
User status: Offline

9th Apr 05 at 11:12

quote:
Originally posted by CorsAsh

quote:
Originally posted by Nismo
External Wastegate is the way forward

Can't have optimal setup for an EW on a roadcar due to it bein illegal for exhaust to vent to atmosphere forward of the backbox... most engines don't develop enough boost to warrant one anyway. You prob already know that tho

more expensive turbo cars have external wastegates. the old citroen CX GTi turbo 2 had an external wastegate

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