Wastegate Porting
05-24-2005, 10:35 PM
#11
Senior Member
Join Date: Oct 2001
Location: Peoria, AZ
Posts: 10,906
[quote name='j9fd3s' date='May 24 2005, 09:40 PM']n1 single? thats the problem right there.
[/quote]
He has the dual.
On my previous setup I had the thunderfab 3" dp/mp with the restrictive RP 52mm catback, and once I hit 3rd gear it was a steay 14psi to 8500+rpms. That was with a ported s4 wastegate.
GMON has the n1 single catback.
[snapback]717383[/snapback]
[/quote]
He has the dual.
On my previous setup I had the thunderfab 3" dp/mp with the restrictive RP 52mm catback, and once I hit 3rd gear it was a steay 14psi to 8500+rpms. That was with a ported s4 wastegate.
GMON has the n1 single catback.
05-24-2005, 11:16 PM
#12
Senior Member
Join Date: May 2002
Location: California
Posts: 22,465
[quote name='1Revvin7' date='May 24 2005, 07:35 PM']He has the dual.
On my previous setup I had the thunderfab 3" dp/mp with the restrictive RP 52mm catback, and once I hit 3rd gear it was a steay 14psi to 8500+rpms. That was with a ported s4 wastegate.
GMON has the n1 single catback.
[/quote]
s4 will creep.
i have the rb turboback. i get no creep at all with an s5 turbo. until i put the cat in, then it went from 8psi to hitting 12-13 in the midrange
On my previous setup I had the thunderfab 3" dp/mp with the restrictive RP 52mm catback, and once I hit 3rd gear it was a steay 14psi to 8500+rpms. That was with a ported s4 wastegate.
GMON has the n1 single catback.
[snapback]717405[/snapback]
[/quote]
s4 will creep.
i have the rb turboback. i get no creep at all with an s5 turbo. until i put the cat in, then it went from 8psi to hitting 12-13 in the midrange
05-25-2005, 01:56 AM
#14
Senior Member
Join Date: Dec 2003
Location: Minneapolis,MN
Posts: 500
[quote name='Impact Blue' date='May 24 2005, 10:54 PM']Whats Matt using for boost control. An EBC was the best investment after the ems and wideband that I have made. Makes life much easier.
[/quote]
Damit, Mike was checkin his email on my computer. That last post was me....
[snapback]717484[/snapback]
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Damit, Mike was checkin his email on my computer. That last post was me....
05-25-2005, 03:21 PM
#15
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Thread Starter
Join Date: May 2004
Location: Coon Rapids, MN
Posts: 310
Right now I just have a vacuum line to the w/g controlling the boost. I usually have a Turbo XS and it will be going in shortly, just wanted to get the car running tip top before I started turning up boost. The wastegate porting worked. Under full load as in 4th gear I am now only hitting like 10psi, so with that boost controller hopefully I can turn that up a bit.
It's so freakin hot here in phoenix though I am going to install my water injection befroe I drive it anymore.
It's so freakin hot here in phoenix though I am going to install my water injection befroe I drive it anymore.
05-25-2005, 03:33 PM
#16
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Join Date: Dec 2003
Location: Minneapolis,MN
Posts: 500
Thats very interesting. I wonder why mine does not see that problem without the ported wg. The s5 is going away shortly but its still kinda fun to figure this stuff out. Matt, is your engine ported? Maybe thats what it is??
05-25-2005, 09:47 PM
#17
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Join Date: Oct 2001
Location: Peoria, AZ
Posts: 10,906
[quote name='GMON' date='May 25 2005, 03:33 PM']Thats very interesting. I wonder why mine does not see that problem without the ported wg. The s5 is going away shortly but its still kinda fun to figure this stuff out. Matt, is your engine ported? Maybe thats what it is??
[/quote]
Exactly. We all wouldn't mind figuring it out, but its kindof pointless. Stock turbos suck.
[snapback]717668[/snapback]
[/quote]
Exactly. We all wouldn't mind figuring it out, but its kindof pointless. Stock turbos suck.
05-25-2005, 11:01 PM
#18
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Join Date: Dec 2003
Location: Atlanta, Ga USA
Posts: 283
Dunno if its any help, but here's what I've experienced, sorta like you guys:
Setup:
Streetported S5 TII block
8.5:1 S4 rotors (not my choice)
S5 rebuilt stock turbo with BNR ported wastegate, no other mods
Haltech E6X for management
GReddy FMIC
Cone intake on the turbo (Bonez)
RX-7.com downpipe, custom 3" midpipe, RX-7.com 2.5" dual catback, no cats or emissions control at all
Ok, the data:
Scenario 1, wastegate actuator arm falls OFF the actuator:
1st and 2nd gear: Spools late (4-5k), starts low like 4-5 psi and peaks at ~7 psi around 5.5-6k then falls off rapidly again to 4ish by 8k.
By 5th gear: boost creeps to ~11 psi, but same basic profile and shitty spool time.
Scenario 2, wastegate connected to compressor outlet directly by hose:
1st gear: positive boost by about 3k, ~7 psi by 4k, peaks at maybe ~9 by 5500.
4th gear: similar but creeps to ~11.5 psi at 5.5k and drops to 7 by 8k.
I dynoed 230 rwhp on Scenario 2's setup, and on the dyno was only hitting 6 psi creeping to 9 in 4th gear, which was slightly odd given the highway results just mentioned. But that's what I got.
Scenario 3, Profec B:
So far, with only an hour or so of tuning and that was mostly trial and error while driving so not much got done, I'm hitting 12 psi solid, dropping to about 9 at 8k, but spools to 12 at or before 4k rpm and lag is greatly reduced (on the order of 1 full second now, from vacuum to full boost, in 4th gear above 4k rpm, when floored suddenly). I think we can probably tune it to be even better, I just gotta tweak the unit.
Anyway, that's my data for ya to chew on.
Setup:
Streetported S5 TII block
8.5:1 S4 rotors (not my choice)
S5 rebuilt stock turbo with BNR ported wastegate, no other mods
Haltech E6X for management
GReddy FMIC
Cone intake on the turbo (Bonez)
RX-7.com downpipe, custom 3" midpipe, RX-7.com 2.5" dual catback, no cats or emissions control at all
Ok, the data:
Scenario 1, wastegate actuator arm falls OFF the actuator:
1st and 2nd gear: Spools late (4-5k), starts low like 4-5 psi and peaks at ~7 psi around 5.5-6k then falls off rapidly again to 4ish by 8k.
By 5th gear: boost creeps to ~11 psi, but same basic profile and shitty spool time.
Scenario 2, wastegate connected to compressor outlet directly by hose:
1st gear: positive boost by about 3k, ~7 psi by 4k, peaks at maybe ~9 by 5500.
4th gear: similar but creeps to ~11.5 psi at 5.5k and drops to 7 by 8k.
I dynoed 230 rwhp on Scenario 2's setup, and on the dyno was only hitting 6 psi creeping to 9 in 4th gear, which was slightly odd given the highway results just mentioned. But that's what I got.
Scenario 3, Profec B:
So far, with only an hour or so of tuning and that was mostly trial and error while driving so not much got done, I'm hitting 12 psi solid, dropping to about 9 at 8k, but spools to 12 at or before 4k rpm and lag is greatly reduced (on the order of 1 full second now, from vacuum to full boost, in 4th gear above 4k rpm, when floored suddenly). I think we can probably tune it to be even better, I just gotta tweak the unit.
Anyway, that's my data for ya to chew on.
05-26-2005, 12:27 AM
#19
Senior Member
Thread Starter
Join Date: May 2004
Location: Coon Rapids, MN
Posts: 310
You know that is a very good point Greg. The engine WAS rebuilt in 94, its stamped on the side of the housings.....it is very possible that maybe it is slightly ported. We wont know for sure though until I open it up someday to port it and rebuild it.
The wierd thing is though that Brandons car did the same thing when he had RB dp/mp and the APEXi N1 duals, and his motor definitely was not ported.
[quote name='GMON' date='May 25 2005, 12:33 PM']Thats very interesting. I wonder why mine does not see that problem without the ported wg. The s5 is going away shortly but its still kinda fun to figure this stuff out. Matt, is your engine ported? Maybe thats what it is??
[/quote]
The wierd thing is though that Brandons car did the same thing when he had RB dp/mp and the APEXi N1 duals, and his motor definitely was not ported.
[quote name='GMON' date='May 25 2005, 12:33 PM']Thats very interesting. I wonder why mine does not see that problem without the ported wg. The s5 is going away shortly but its still kinda fun to figure this stuff out. Matt, is your engine ported? Maybe thats what it is??
[snapback]717668[/snapback]
[/quote]
05-26-2005, 12:31 AM
#20
Senior Member
Thread Starter
Join Date: May 2004
Location: Coon Rapids, MN
Posts: 310
[quote name='DigitalSynthesis' date='May 25 2005, 08:01 PM']Dunno if its any help, but here's what I've experienced, sorta like you guys:
Setup:
Streetported S5 TII block
8.5:1 S4 rotors (not my choice)
S5 rebuilt stock turbo with BNR ported wastegate, no other mods
Haltech E6X for management
GReddy FMIC
Cone intake on the turbo (Bonez)
RX-7.com downpipe, custom 3" midpipe, RX-7.com 2.5" dual catback, no cats or emissions control at all
Ok, the data:
Scenario 1, wastegate actuator arm falls OFF the actuator:
1st and 2nd gear: Spools late (4-5k), starts low like 4-5 psi and peaks at ~7 psi around 5.5-6k then falls off rapidly again to 4ish by 8k.
By 5th gear: boost creeps to ~11 psi, but same basic profile and shitty spool time.
Scenario 2, wastegate connected to compressor outlet directly by hose:
1st gear: positive boost by about 3k, ~7 psi by 4k, peaks at maybe ~9 by 5500.
4th gear: similar but creeps to ~11.5 psi at 5.5k and drops to 7 by 8k.
I dynoed 230 rwhp on Scenario 2's setup, and on the dyno was only hitting 6 psi creeping to 9 in 4th gear, which was slightly odd given the highway results just mentioned. But that's what I got.
Scenario 3, Profec B:
So far, with only an hour or so of tuning and that was mostly trial and error while driving so not much got done, I'm hitting 12 psi solid, dropping to about 9 at 8k, but spools to 12 at or before 4k rpm and lag is greatly reduced (on the order of 1 full second now, from vacuum to full boost, in 4th gear above 4k rpm, when floored suddenly). I think we can probably tune it to be even better, I just gotta tweak the unit.
Anyway, that's my data for ya to chew on.
[/quote]
That is basically what mine is doing now. It doesnt spool like it did before I had the w/g ported. Before it was, I was at 8psi in 1st by 4k and 14psi by about 4500 in 2nd gear.
Now in 1st it takes it a little longer to spool up and only reaches about 6-7 psi, and maz boost is like 10 psi and thats in 4th gear and not full boost until 5500k+
Setup:
Streetported S5 TII block
8.5:1 S4 rotors (not my choice)
S5 rebuilt stock turbo with BNR ported wastegate, no other mods
Haltech E6X for management
GReddy FMIC
Cone intake on the turbo (Bonez)
RX-7.com downpipe, custom 3" midpipe, RX-7.com 2.5" dual catback, no cats or emissions control at all
Ok, the data:
Scenario 1, wastegate actuator arm falls OFF the actuator:
1st and 2nd gear: Spools late (4-5k), starts low like 4-5 psi and peaks at ~7 psi around 5.5-6k then falls off rapidly again to 4ish by 8k.
By 5th gear: boost creeps to ~11 psi, but same basic profile and shitty spool time.
Scenario 2, wastegate connected to compressor outlet directly by hose:
1st gear: positive boost by about 3k, ~7 psi by 4k, peaks at maybe ~9 by 5500.
4th gear: similar but creeps to ~11.5 psi at 5.5k and drops to 7 by 8k.
I dynoed 230 rwhp on Scenario 2's setup, and on the dyno was only hitting 6 psi creeping to 9 in 4th gear, which was slightly odd given the highway results just mentioned. But that's what I got.
Scenario 3, Profec B:
So far, with only an hour or so of tuning and that was mostly trial and error while driving so not much got done, I'm hitting 12 psi solid, dropping to about 9 at 8k, but spools to 12 at or before 4k rpm and lag is greatly reduced (on the order of 1 full second now, from vacuum to full boost, in 4th gear above 4k rpm, when floored suddenly). I think we can probably tune it to be even better, I just gotta tweak the unit.
Anyway, that's my data for ya to chew on.
[snapback]717793[/snapback]
[/quote]
That is basically what mine is doing now. It doesnt spool like it did before I had the w/g ported. Before it was, I was at 8psi in 1st by 4k and 14psi by about 4500 in 2nd gear.
Now in 1st it takes it a little longer to spool up and only reaches about 6-7 psi, and maz boost is like 10 psi and thats in 4th gear and not full boost until 5500k+