Is there a better designed plenum than this?
#201
Originally Posted by BROM@ZOO
Originally Posted by Mike Rainbird
Brom,
Because the T4 is a truck turbo and was never designed to have a fast spool up time with a small capacity petrol engine. It can be forced to with extra capacity though .
Because the T4 is a truck turbo and was never designed to have a fast spool up time with a small capacity petrol engine. It can be forced to with extra capacity though .
so in your new engine is it gona rev then
Extra capacity was just helpfull to move the damn turbine with any speed in the first place
#202
i know that stu i mean over reving the turbo
2lt cozzy boost drops off 7600 max (boost tailed off from 36 psi)
so surly a bigger engine will require more air hence boost dropping off earlyer
i weld things so dont go into dynamics of turbos
2lt cozzy boost drops off 7600 max (boost tailed off from 36 psi)
so surly a bigger engine will require more air hence boost dropping off earlyer
i weld things so dont go into dynamics of turbos
#203
Not really Brom, again, horsepower is largely a function of airmoving ability against RPM.
If your reving to 9k to make your power, and theres a lot of power, your gonna need a big turbo.
Dont forget the T4 is really a 400bhp turbo if i recall (Got the compressor map somewhere) so expecting over 500 was always a fooking stretch anyway...
If your reving to 9k to make your power, and theres a lot of power, your gonna need a big turbo.
Dont forget the T4 is really a 400bhp turbo if i recall (Got the compressor map somewhere) so expecting over 500 was always a fooking stretch anyway...
#204
Originally Posted by Stu @ M Developments
Originally Posted by BROM@ZOO
Originally Posted by Mike Rainbird
Brom,
Because the T4 is a truck turbo and was never designed to have a fast spool up time with a small capacity petrol engine. It can be forced to with extra capacity though .
Because the T4 is a truck turbo and was never designed to have a fast spool up time with a small capacity petrol engine. It can be forced to with extra capacity though .
so in your new engine is it gona rev then
Extra capacity was just helpfull to move the damn turbine with any speed in the first place
#205
Originally Posted by Mike Rainbird
No, I just don't drink or smoke .
Do spend about 98% of what I earn on cars/petrol though
=========================================
#206
Originally Posted by Doug Stirling
Originally Posted by Mike Rainbird
No, I just don't drink or smoke .
Do spend about 98% of what I earn on cars/petrol though
=========================================
#207
Originally Posted by Stu @ M Developments
Not really Brom, again, horsepower is largely a function of airmoving ability against RPM.
If your reving to 9k to make your power, and theres a lot of power, your gonna need a big turbo.
Dont forget the T4 is really a 400bhp turbo if i recall (Got the compressor map somewhere) so expecting over 500 was always a fooking stretch anyway...
If your reving to 9k to make your power, and theres a lot of power, your gonna need a big turbo.
Dont forget the T4 is really a 400bhp turbo if i recall (Got the compressor map somewhere) so expecting over 500 was always a fooking stretch anyway...
i will stick to welding and designing things for cozys
#209
so whats the happy meduim then with these gt turbos
if you run a gt35 small turbine housing you get low down boost 3000 rpm 1 1/2 bar but it will surge its nuts off till 5000 rpm wont make large boost 2.6 bar
go for a gt 35/40
large exhaust housing small wheel you get no boost till 4200 but then it peeks 2.6 bar at 4400
how can you have best of both worlds ?
thanx for your input
if you run a gt35 small turbine housing you get low down boost 3000 rpm 1 1/2 bar but it will surge its nuts off till 5000 rpm wont make large boost 2.6 bar
go for a gt 35/40
large exhaust housing small wheel you get no boost till 4200 but then it peeks 2.6 bar at 4400
how can you have best of both worlds ?
thanx for your input
#210
Originally Posted by hexxon
Originally Posted by BROM@ZOO
ok mate no worrys
i will stick to welding and designing things for cozys
i will stick to welding and designing things for cozys
#211
question : This F1 Turbo the Jenspeed\Blue WRC car has why is it so special who is it made by ?? Surely turbo Technology has moved on since F1 cars had turbo's and how much would it cost ??
ta
ta
#212
Originally Posted by BROM@ZOO
so whats the happy meduim then with these gt turbos
if you run a gt35 small turbine housing you get low down boost 3000 rpm 1 1/2 bar but it will surge its nuts off till 5000 rpm wont make large boost 2.6 bar
go for a gt 35/40
large exhaust housing small wheel you get no boost till 4200 but then it peeks 2.6 bar at 4400
how can you have best of both worlds ?
thanx for your input
if you run a gt35 small turbine housing you get low down boost 3000 rpm 1 1/2 bar but it will surge its nuts off till 5000 rpm wont make large boost 2.6 bar
go for a gt 35/40
large exhaust housing small wheel you get no boost till 4200 but then it peeks 2.6 bar at 4400
how can you have best of both worlds ?
thanx for your input
Doing all this in an appropriate way gives a nice setup...
#213
Dont know anything about this turbo-specification to be honest. Strange that they call them F1-turbos, as these wouldnt be much fitting for a Cosworth YB in original shape. Made for cars revving higher than any Cosworth YB known to me. Turbo technology is so much better today comparing 20 years back. Though, when new, these were state of the art. A state of the art turbo today is the same Ł as a nice car from in here... If not even more... Dont know anything about the Jenspeed turbo as said, but would suspect that KRB Trading is involved.
Originally Posted by Kev.H
question : This F1 Turbo the Jenspeed\Blue WRC car has why is it so special who is it made by ?? Surely turbo Technology has moved on since F1 cars had turbo's and how much would it cost ??
ta
ta
#214
To elaborate very lightly on this, you also need to match the turbine speed against turbine housing and engine airflow with any given RPM as if you spin it to fast too soon, you will end up with "Surge" by trying to force the engine to consume air it simply isnt ready to consume and you end up in a "No Flow " situation
#215
thanx mate
am kind of happy with mine as it is it come on full boost at 4400 and goes to 9000 i am also told it will take 200 shot of noz with out over reving aswell
i dont no that yet as i havent used the noz yet
thanx for your input nice to have a techy that answers questons
#217
Yes, exactly, this is where the exhaust pressure comes into play... It shouldnt be to high at any revs, considering the turbine trim as well of course, since this will force unwanted air into the engine.
Originally Posted by Stu @ M Developments
To elaborate very lightly on this, you also need to match the turbine speed against turbine housing and engine airflow with any given RPM as if you spin it to fast too soon, you will end up with "Surge" by trying to force the engine to consume air it simply isnt ready to consume and you end up in a "No Flow " situation
#218
Hey, send me that one! peknd01@student.vxu.se
Originally Posted by Stu @ M Developments
Ive got a great essay on surge somewhere
#220
Originally Posted by hexxon
Hey, send me that one! peknd01@student.vxu.se
Originally Posted by Stu @ M Developments
Ive got a great essay on surge somewhere
#221
DEYTUKURJERBS
Originally Posted by Kev.H
question : This F1 Turbo the Jenspeed\Blue WRC car has why is it so special who is it made by ?? Surely turbo Technology has moved on since F1 cars had turbo's and how much would it cost ??
ta
ta
The F1 bit is just talk/hype/bullshit.
Ive seen a LOT of F1/Indycar turbos (theres a storeroom full of em at Bluesprint) and they NOTHING like that, and TBH like Patrik said, a turbo suited to F1/Indy spec wouldnt be at all suited to that engine.
And it looks remarkably like a Turbonetics turbo
the white RS500 also seen that saying F1 turbo in the spec, but i cant see from the pics what it is, wouldnt be suprised if its a Holset or summat...
#222
Originally Posted by Itsmeagain
Originally Posted by Kev.H
question : This F1 Turbo the Jenspeed\Blue WRC car has why is it so special who is it made by ?? Surely turbo Technology has moved on since F1 cars had turbo's and how much would it cost ??
ta
ta
The F1 bit is just talk/hype/bullshit.
Ive seen a LOT of F1/Indycar turbos (theres a storeroom full of em at Bluesprint) and they NOTHING like that, and TBH like Patrik said, a turbo suited to F1/Indy spec wouldnt be at all suited to that engine.
And it looks remarkably like a Turbonetics turbo
the white RS500 also seen that saying F1 turbo in the spec, but i cant see from the pics what it is, wouldnt be suprised if its a Holset or summat...
#223
Caraholic
iTrader: (3)
Brom,
I would not push any of my turbos beyond 32psi. To do so gets you into all sorts of trouble with overspeeding / higher inlet temps etc.
My old RS500 engine used to hold 32psi to the limiter (8k) and my current engine with it's higher than usual (T4 type) compression ratio is limited to a held 27psi all the way to the limiter (7.8k).
I will stick within the normal limits of the standard valve gear with new engine, as I don't see the point in making a laggy beast. I have got so use to the T3/4 type response my current engine has, I would be loathe to get rid of it.
I want to drive Lee's car to see if the response he has is better than a T4 to see if I go GT30 or GT35. If the GT35 has similar (or better) response than a T4, then I'll go for that (and run less boost to achieve the power I want) or if not, go to the GT30, which I know makes 530bhp @ 26psi... .
I would not push any of my turbos beyond 32psi. To do so gets you into all sorts of trouble with overspeeding / higher inlet temps etc.
My old RS500 engine used to hold 32psi to the limiter (8k) and my current engine with it's higher than usual (T4 type) compression ratio is limited to a held 27psi all the way to the limiter (7.8k).
I will stick within the normal limits of the standard valve gear with new engine, as I don't see the point in making a laggy beast. I have got so use to the T3/4 type response my current engine has, I would be loathe to get rid of it.
I want to drive Lee's car to see if the response he has is better than a T4 to see if I go GT30 or GT35. If the GT35 has similar (or better) response than a T4, then I'll go for that (and run less boost to achieve the power I want) or if not, go to the GT30, which I know makes 530bhp @ 26psi... .
#231
Originally Posted by BROM@ZOO
ohh look the good old audi wastegate i ran one of those on me saff last yr
nice piece of kit can change valves in them and alsorts
#234
Originally Posted by Mike Rainbird
Doug,
This is the conversion I priced for you, so no it is not a drop-in by your definition (i.e. cheap ).
This is the conversion I priced for you, so no it is not a drop-in by your definition (i.e. cheap ).
#235
DEYTUKURJERBS
Doug- Some companies can do you an internal wastegate GT30 which is a drop in job, but IMHO its a bit like skimming pistons or using a spacer plate to lower compression
Bodge
Bodge
#236
Sorry for the pic-sizes, I'm a newbie
Here's another escort's engine bay from finland, not cossie though... I left the pics behind links...
1995
http://www.tvracing.net/images/Konehuone.jpg
2002
http://www.tvracing.net/images/viikki2.jpg
http://www.tvracing.net/images/Koneh...kokoamista.jpg
2004
http://www.tvracing.net/images/Konehuone%20.jpg
Plenum
http://www.tvracing.net/images/imusarja%20koottuna.jpg
http://www.tvracing.net/images/imuarja.jpg
http://www.tvracing.net/images/IMG%202imusarja.jpg
Here's another escort's engine bay from finland, not cossie though... I left the pics behind links...
1995
http://www.tvracing.net/images/Konehuone.jpg
2002
http://www.tvracing.net/images/viikki2.jpg
http://www.tvracing.net/images/Koneh...kokoamista.jpg
2004
http://www.tvracing.net/images/Konehuone%20.jpg
Plenum
http://www.tvracing.net/images/imusarja%20koottuna.jpg
http://www.tvracing.net/images/imuarja.jpg
http://www.tvracing.net/images/IMG%202imusarja.jpg
#237
Originally Posted by Itsmeagain
Doug- Some companies can do you an internal wastegate GT30 which is a drop in job, but IMHO its a bit like skimming pistons or using a spacer plate to lower compression
Bodge
Bodge
I guess at this level of BHP (500 +) an external wastgate is the only proper way to do the job
#239
Originally Posted by Jallu
Sorry for the pic-sizes, I'm a newbie
Here's another escort's engine bay from finland, not cossie though... I left the pics behind links...
1995
http://www.tvracing.net/images/Konehuone.jpg
2002
http://www.tvracing.net/images/viikki2.jpg
http://www.tvracing.net/images/Koneh...kokoamista.jpg
2004
http://www.tvracing.net/images/Konehuone%20.jpg
Plenum
http://www.tvracing.net/images/imusarja%20koottuna.jpg
http://www.tvracing.net/images/imuarja.jpg
http://www.tvracing.net/images/IMG%202imusarja.jpg
Here's another escort's engine bay from finland, not cossie though... I left the pics behind links...
1995
http://www.tvracing.net/images/Konehuone.jpg
2002
http://www.tvracing.net/images/viikki2.jpg
http://www.tvracing.net/images/Koneh...kokoamista.jpg
2004
http://www.tvracing.net/images/Konehuone%20.jpg
Plenum
http://www.tvracing.net/images/imusarja%20koottuna.jpg
http://www.tvracing.net/images/imuarja.jpg
http://www.tvracing.net/images/IMG%202imusarja.jpg
cool idea isnt it
i moved mine 10 inch back to give better weight split