s5 turbo stock wastegate question

FerociousP · 07-28-2008, 03:00 PM

heres the deal:

s5 n/a block with complete stock turbo setup.
boosts 5-6psi max
If I plug the wastegate line it will hit 10 (before I backed off)

would that be a weak wastegate spring??

If so, I was thinking about a boost controller or just replacing the wastegate... my plan was always for 9-10 max. what would be the best way go?

anyone have a spare wastegate actuator?

TehMonkay · 07-28-2008, 03:09 PM

port the wastegate.

85rx-7gsl-se · 07-28-2008, 03:24 PM

Monkey, how would porting help? Its already ported which we think is the problem...The stock spring is like 7-8psi, but a 7-8psi spring starts opening earlier to maintain 7-8psi....With a ported wastegate, it takes less actuation to achieve the same wastegate venting so by the time you reach 5-6psi, its already opened as far as a stock gate at 7-8psi.

TehMonkay · 07-28-2008, 04:11 PM

ahh, read that completely wrong.

Yeah just try another actuator, unfortunately i dont have any of those though.

85rx-7gsl-se · 07-28-2008, 07:15 PM

No problem man, you just had me really confused lol

Turbo vw · 07-28-2008, 07:38 PM

thers some way you can rig a spring on the out side of the wast gate to make it open sooner IDK a guy on a nother forum had one set up for some sort of bild he was doin but if i was you id just git a new wastgate make ur life a hole lot easer

Rotary_Rocket_87 · 07-28-2008, 07:49 PM

why not just use a boost contoller, manual or electric

Phoenix7 · 07-28-2008, 08:05 PM

I was wondering the same thing.

I figure the wastegate was faulty since he didn't metion anything about a boost controller.

FerociousP · 07-28-2008, 09:18 PM

I did mention something about a boost controller... about possibly using one if that was the best alternative...

I'm not using a boost controller and the wastegate is ported.

85rx-7gsl-se · 07-28-2008, 09:29 PM

There ya go Paul...Making things all confusing like

FerociousP · 07-28-2008, 09:41 PM

no i'm not... people don't pay attention

TehMonkay · 07-28-2008, 09:50 PM

as long as you didnt go too big on the porting, or perhaps you need to adjust the actuator? I think there is an adjusting nut, dont blame me if i'm wrong though.

FerociousP · 07-28-2008, 10:03 PM

i don't think its a porting problem because when I didn't hook up the wastegate it boosted past 5 easily

85rx-7gsl-se · 07-28-2008, 10:17 PM

I think you will have this problem with any stock actuator, bigger wastegate porting will cause this regardless IMHO. Get a boost controller

TehMonkay · 07-29-2008, 08:29 AM

if he plugs the wastegate line, it should go past 10 no problem, theres something else wrong that a boost controller cant fix.

07-28-2008, 03:00 PM	#1
FerociousP I-had-a-bad-experience... Join Date: Feb 2008 Location: M'boro Posts: 1,046 Rep Power: 19	s5 turbo stock wastegate question heres the deal: s5 n/a block with complete stock turbo setup. boosts 5-6psi max If I plug the wastegate line it will hit 10 (before I backed off) would that be a weak wastegate spring?? If so, I was thinking about a boost controller or just replacing the wastegate... my plan was always for 9-10 max. what would be the best way go? anyone have a spare wastegate actuator? __________________ '15 Juke Nismo '06 MX-5 GT SOLD '04 S Silver RX-8 GT Track Day Use SOLD '90 Black TII vert w/ Sprint RE stock port/turbo DD dyno (242.6whp@5500rpm @12psi 8psi@redline) and (250ftlbtq@4800rpm @13psi) SOLD '89 GTUs 6p TII SOLD, '87 sport SOLD, '79 SA stock SOLD '91 B2600i 4x4 w/ Rx-8 LSD SOLD

07-28-2008, 03:09 PM	#2
TehMonkay Rotary Fanatic Join Date: Apr 2008 Location: Louisville, KY Posts: 302 Rep Power: 18	port the wastegate. __________________ My car blows up everytime I start it, it's rotary

07-28-2008, 04:11 PM	#4
TehMonkay Rotary Fanatic Join Date: Apr 2008 Location: Louisville, KY Posts: 302 Rep Power: 18	ahh, read that completely wrong. Yeah just try another actuator, unfortunately i dont have any of those though. __________________ My car blows up everytime I start it, it's rotary

07-28-2008, 07:49 PM	#7
Rotary_Rocket_87 2nd Generation Freak Join Date: Mar 2008 Location: Chuck Vegas, NH Posts: 64 Rep Power: 18	why not just use a boost contoller, manual or electric __________________ '87 TII- full emissions removal, a/c removed, FPD removed, dual 12" e-fans, Rotary Performance FCD, ACT unsprung 6 puck w/ Xtreme PP, custom open 2.5 inch exhaust, custom clutch pivot ball, K&N cone filter, TB mod, RB downpipe, motor blown 8/7/09 '94 Mazda B4000- POS beater truck, stock "The easiest way to fail is to never try." - Me

07-28-2008, 09:18 PM	#9
FerociousP I-had-a-bad-experience... Join Date: Feb 2008 Location: M'boro Posts: 1,046 Rep Power: 19	I did mention something about a boost controller... about possibly using one if that was the best alternative... I'm not using a boost controller and the wastegate is ported. __________________ '15 Juke Nismo '06 MX-5 GT SOLD '04 S Silver RX-8 GT Track Day Use SOLD '90 Black TII vert w/ Sprint RE stock port/turbo DD dyno (242.6whp@5500rpm @12psi 8psi@redline) and (250ftlbtq@4800rpm @13psi) SOLD '89 GTUs 6p TII SOLD, '87 sport SOLD, '79 SA stock SOLD '91 B2600i 4x4 w/ Rx-8 LSD SOLD

07-28-2008, 07:38 PM	#6
Turbo vw i know i cant spell Join Date: Jul 2008 Location: Kingsport Posts: 34 Rep Power: 0	thers some way you can rig a spring on the out side of the wast gate to make it open sooner IDK a guy on a nother forum had one set up for some sort of bild he was doin but if i was you id just git a new wastgate make ur life a hole lot easer

07-28-2008, 09:41 PM	#11
FerociousP I-had-a-bad-experience... Join Date: Feb 2008 Location: M'boro Posts: 1,046 Rep Power: 19	no i'm not... people don't pay attention __________________ '15 Juke Nismo '06 MX-5 GT SOLD '04 S Silver RX-8 GT Track Day Use SOLD '90 Black TII vert w/ Sprint RE stock port/turbo DD dyno (242.6whp@5500rpm @12psi 8psi@redline) and (250ftlbtq@4800rpm @13psi) SOLD '89 GTUs 6p TII SOLD, '87 sport SOLD, '79 SA stock SOLD '91 B2600i 4x4 w/ Rx-8 LSD SOLD

07-28-2008, 09:50 PM	#12
TehMonkay Rotary Fanatic Join Date: Apr 2008 Location: Louisville, KY Posts: 302 Rep Power: 18	as long as you didnt go too big on the porting, or perhaps you need to adjust the actuator? I think there is an adjusting nut, dont blame me if i'm wrong though. __________________ My car blows up everytime I start it, it's rotary

07-28-2008, 10:03 PM	#13
FerociousP I-had-a-bad-experience... Join Date: Feb 2008 Location: M'boro Posts: 1,046 Rep Power: 19	i don't think its a porting problem because when I didn't hook up the wastegate it boosted past 5 easily __________________ '15 Juke Nismo '06 MX-5 GT SOLD '04 S Silver RX-8 GT Track Day Use SOLD '90 Black TII vert w/ Sprint RE stock port/turbo DD dyno (242.6whp@5500rpm @12psi 8psi@redline) and (250ftlbtq@4800rpm @13psi) SOLD '89 GTUs 6p TII SOLD, '87 sport SOLD, '79 SA stock SOLD '91 B2600i 4x4 w/ Rx-8 LSD SOLD

07-29-2008, 08:29 AM	#15
TehMonkay Rotary Fanatic Join Date: Apr 2008 Location: Louisville, KY Posts: 302 Rep Power: 18	if he plugs the wastegate line, it should go past 10 no problem, theres something else wrong that a boost controller cant fix. __________________ My car blows up everytime I start it, it's rotary