Dyno'd my Turbo II yesterday!
Tokyo Drift Sellout
Joined: Feb 2005
Posts: 211
Likes: 0
From: Seattle
Originally Posted by got_boost
please send me the video by email : got_boost_@hotmail.com !!!!
ill make a big rotary compilation out of normal ppl like us, not necessarely magasine cover cars, mostly sleepers !!!
ill make a big rotary compilation out of normal ppl like us, not necessarely magasine cover cars, mostly sleepers !!!
Do you want full res or compressed video?
Let me know
Originally Posted by MountainTurbo
Man, that's not fair. When I dynoed my car, I couldn't get the stock turbo to hold boost past 5500rpm. Even with the EBC on now, I can barely hold 5 psi past 5500rpm, and so I don't really take it past 6,500. I know the car has more in it, just have to figure out how to get the turbo to keep up:P
(I've got an s4)Other things that help keep my boost at 10psi+ 'til redline are my excellent WG port, my 80mm DP/MP and dual 60mm N1's, my 3" TID and my Profec-B EBC.
erik,
none of those things will help a turbo hold boost til redline. turbos, usually stock ones, drop boost because they cant physically keep up and flow enough and to hold up the higher boost in the upper-RPM range.
s4's usually dont bleed off boost as bad as the s5's, but they also dont make as much power, particularly in the midrange.
the moral of the story is buying EBC's and nice exhaust, and porting the wastegate and stuff isnt going to make the turbo physically able to displace more air
hell, you could probably weld the wastegate shut and it'll still drop boost by the time it gets to redline
none of those things will help a turbo hold boost til redline. turbos, usually stock ones, drop boost because they cant physically keep up and flow enough and to hold up the higher boost in the upper-RPM range.
s4's usually dont bleed off boost as bad as the s5's, but they also dont make as much power, particularly in the midrange.
the moral of the story is buying EBC's and nice exhaust, and porting the wastegate and stuff isnt going to make the turbo physically able to displace more air
hell, you could probably weld the wastegate shut and it'll still drop boost by the time it gets to redline
hell, you could probably weld the wastegate shut and it'll still drop boost by the time it gets to redline
i still want to know what eric is using to control fuel!!!!!!!!!!!!
Originally Posted by jacobcartmill
erik,
none of those things will help a turbo hold boost til redline. turbos, usually stock ones, drop boost because they cant physically keep up and flow enough and to hold up the higher boost in the upper-RPM range.
s4's usually dont bleed off boost as bad as the s5's, but they also dont make as much power, particularly in the midrange.
the moral of the story is buying EBC's and nice exhaust, and porting the wastegate and stuff isnt going to make the turbo physically able to displace more air hell, you could probably weld the wastegate shut and it'll still drop boost by the time it gets to redline
none of those things will help a turbo hold boost til redline. turbos, usually stock ones, drop boost because they cant physically keep up and flow enough and to hold up the higher boost in the upper-RPM range.
s4's usually dont bleed off boost as bad as the s5's, but they also dont make as much power, particularly in the midrange.
the moral of the story is buying EBC's and nice exhaust, and porting the wastegate and stuff isnt going to make the turbo physically able to displace more air
hell, you could probably weld the wastegate shut and it'll still drop boost by the time it gets to redlineThe WG port allows for no spikes, meaning that I can turn the boost up without having to worry about a 15psi spike. What I'm saying is, before the new WG port, if I set my boost to "8psi", it would actually go up to 15psi, meaning that it would be back down to 8psi at redline... NOW, I can turn the boost controller up to 12psi, and because there's no spike--it'll hold 12psi to redline.
About the exhaust and TID: When I was running my stock cat (to pass emissions) the boost would drop significantly more in the higher RPM's--because it was (obviously) choking out the turbo. Same with when I was running my 60mm DP/MP and stock TID. Now I'm running an 80mm DP/MP and 3" TID and it drops like 1psi around redline(compared to like 5psi before).
Also, my EBC has a "balance" control, which according to Greddy helps prevent over-boosting and "hunching" (unstable boost)--which ties into my first point I suppose.
But yeah, I don't really care about the technical aspect of what I'm saying--I'm merely speaking from my personal and practical experience.
pressure test your intake manifold!
If your turbo won't hold boost till redline it's probably got some major boost leaks to deal with.
my stock turbo had no trouble holding 10+psi at redline.
If your turbo won't hold boost till redline it's probably got some major boost leaks to deal with.
my stock turbo had no trouble holding 10+psi at redline.
Originally Posted by Terrh
pressure test your intake manifold!
If your turbo won't hold boost till redline it's probably got some major boost leaks to deal with.
my stock turbo had no trouble holding 10+psi at redline.
If your turbo won't hold boost till redline it's probably got some major boost leaks to deal with.
my stock turbo had no trouble holding 10+psi at redline.
Senior Member
Joined: Jan 2004
Posts: 515
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From: Utah (land of mountains)
Originally Posted by Terrh
pressure test your intake manifold!
If your turbo won't hold boost till redline it's probably got some major boost leaks to deal with.
my stock turbo had no trouble holding 10+psi at redline.
If your turbo won't hold boost till redline it's probably got some major boost leaks to deal with.
my stock turbo had no trouble holding 10+psi at redline.
Didn't have the problem before when the engine was basically stock... would only lose ~1psi.
Now with the streetport and higher compression rotors, it just can't keep up.
I don't have any emissions crap on it, and the TID is a 3" with no AFM (Haltech controlled car). No cat on the car, but the exhaust is a little on the small side (RP55). I'm also running a Greddy Profec B Spec II.
I just never had this problem this bad before, maybe it's time to upgrade this stock S5 turbo to a hybrid... and I'm already planning on the racing beat turbo back exhaust.
Eats, Sleeps, Dreams Rotary
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Joined: Jul 2001
Posts: 3,383
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From: Stinson Beach, Ca
awesome thread. love to see what these 9.4:1 rotors will crank out.
I'm doing my 4 port 13bt w/ 9.4:1 rotors and a little tiny streetport. will have an h-trim hybrid and should be interesting to say the least.
-Ben Martin
P.S. whooping that modded dsm is hiiiiiiiiiiiiiiiiiiilarious "evo16g, 660s, 22pounds blah blah blah" i know the exact same type of dsm people.
I'm doing my 4 port 13bt w/ 9.4:1 rotors and a little tiny streetport. will have an h-trim hybrid and should be interesting to say the least.
-Ben Martin
P.S. whooping that modded dsm is hiiiiiiiiiiiiiiiiiiilarious "evo16g, 660s, 22pounds blah blah blah" i know the exact same type of dsm people.
Originally Posted by Node
awesome thread. love to see what these 9.4:1 rotors will crank out.
I'm doing my 4 port 13bt w/ 9.4:1 rotors and a little tiny streetport. will have an h-trim hybrid and should be interesting to say the least.
-Ben Martin
P.S. whooping that modded dsm is hiiiiiiiiiiiiiiiiiiilarious "evo16g, 660s, 22pounds blah blah blah" i know the exact same type of dsm people.
I'm doing my 4 port 13bt w/ 9.4:1 rotors and a little tiny streetport. will have an h-trim hybrid and should be interesting to say the least.
-Ben Martin
P.S. whooping that modded dsm is hiiiiiiiiiiiiiiiiiiilarious "evo16g, 660s, 22pounds blah blah blah" i know the exact same type of dsm people.
(not to mention bringing up a bitter moment in his life, lol)
Originally Posted by Node
eriksseven, i'd enjoy talking to you about your car if you have a moment. As I'm building a 9.4:1 13BT currently.
my aim is nodebat
Thanks,
Ben Martin
my aim is nodebat
Thanks,
Ben Martin
Great numbers for such a basic set-up. I haven't quite familiarized myself with the fc yet, but \ those numbers do impress! Being that you dyno'ed on a dynamics, you should be able to compare yours to mine: http://static.flickr.com/48/120048715_52e3e7390a_b.jpg I've done basically everything you can to dc5 n/a before touching the bottom end. Which wasn't cheap let me tell you. I've been looking at fc's for quite some time now. The t2's are a great platform, I envy you folks.
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