wastegate group buy?
04-16-2004, 06:25 AM
#61
Racer
Join Date: Jan 2004
Location: Scotland
Posts: 489
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Fen
I don't think TiAl do a 35mm one - I think there's either a mistake or a difference in measuring standard on the SFR website. Check http://www.tialsport.com/wastegates.htm
As stated above you are actually better with a smaller one is most situations. Although I have a 46mm I would buy the 38mm today, knowing what I know now.
I don't think TiAl do a 35mm one - I think there's either a mistake or a difference in measuring standard on the SFR website. Check http://www.tialsport.com/wastegates.htm
As stated above you are actually better with a smaller one is most situations. Although I have a 46mm I would buy the 38mm today, knowing what I know now.
04-16-2004, 07:58 AM
#62
Three Wheelin'
Thread Starter
Join Date: Sep 2003
Location: seattle
Posts: 1,692
Likes: 0
Received 0 Likes
on
0 Posts
bronco951- I would recommend the stock spring rate (.8 bar) 11.5 psi
You can always go higher with a boost controller, but never less than the wastegate spring rate.
You can always go higher with a boost controller, but never less than the wastegate spring rate.
04-16-2004, 09:26 AM
#64
Nordschleife Master
Originally posted by porshhhh951
I am going to be in for one for sure and maybe two. I will call Tim!
I run the 46mm on my car now and I love it. I convinced Robert(white turbo cobra) that the 38mm would work well on his car since he is running low boost. I also have another friend that is turbocharging his type r so he might want one as well. Peace.
I am going to be in for one for sure and maybe two. I will call Tim!
I run the 46mm on my car now and I love it. I convinced Robert(white turbo cobra) that the 38mm would work well on his car since he is running low boost. I also have another friend that is turbocharging his type r so he might want one as well. Peace.
A 38mm WG might be to small for a low boost turbo V8 with high compression. 38mm is only 1,5" and probably less than half the flow will go through the turbo so there's a big risk 1,5" diam will limit the flow.
But... if it's too small there's an easy fix... turn up the boost
04-16-2004, 06:42 PM
#65
Originally posted by slim_boy_fat
Thanks, your obviously very knowlagable, you must be enjoying your car this fine weather.
Thanks, your obviously very knowlagable, you must be enjoying your car this fine weather.
04-16-2004, 07:16 PM
#66
Monkeys Removed by Request
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Originally posted by Duke
Actually you need bigger wastegate the lower boost you run since more exhaust flow is directed through the wastegate and not to the turbo.
A 38mm WG might be to small for a low boost turbo V8 with high compression. 38mm is only 1,5" and probably less than half the flow will go through the turbo so there's a big risk 1,5" diam will limit the flow.
But... if it's too small there's an easy fix... turn up the boost
Actually you need bigger wastegate the lower boost you run since more exhaust flow is directed through the wastegate and not to the turbo.
A 38mm WG might be to small for a low boost turbo V8 with high compression. 38mm is only 1,5" and probably less than half the flow will go through the turbo so there's a big risk 1,5" diam will limit the flow.
But... if it's too small there's an easy fix... turn up the boost
Thanks for your response Duke. He is going to be running 14psi. Is this not enough boost for the 38mm??? Should I tell him to go with this 46mm instead?? Thanks for your imput on this subject.
04-16-2004, 08:27 PM
#67
Addict
Rennlist Member
Rennlist Member
You could run 8psi and the 38mm still would flow enough, our engines are simply too small to need any more at any boost levels we'll ever run.
Sam
Sam
04-17-2004, 10:20 AM
#71
Burning Brakes
The wastegate is a valve to divert exhaust gas away from the turbo thus generate less boost. A bigger hole loses more potential boost down the exhaust than a smaller one. If you are running very high boost levels and you want to lose it very quickly then a big hole is required, if you are running more sensible boost levels and you want to keep the turbo spinning during gear changes (most boost should exiting through the dump valve anyway) then isn't a smaller wastegate better?
Tony
Tony
04-17-2004, 11:44 AM
#73
Racer
Join Date: Jan 2004
Location: Scotland
Posts: 489
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by UK952
P.S. Ordered mine yesterday
P.S. Ordered mine yesterday
04-17-2004, 12:05 PM
#75
Intermediate
Join Date: Oct 2003
Location: Essex, England
Posts: 28
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by UK952
P.S. Ordered mine yesterday
P.S. Ordered mine yesterday
I guess there's not much chance of getting them here and on for next weekend.