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| RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections. |
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| RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections. |
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07-28-2008, 03:00 PM
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#1 |
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I-had-a-bad-experience...
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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?
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 '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 |
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07-28-2008, 03:24 PM
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Mod With The Least :P
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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.
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Resident Post Whore Polluting the environment one revolution at a time.  www.tennspeed.net Quote:
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07-28-2008, 04:11 PM
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Rotary Fanatic
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ahh, read that completely wrong.
Yeah just try another actuator, unfortunately i dont have any of those though.
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My car blows up everytime I start it, it's rotary  
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07-28-2008, 07:15 PM
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Mod With The Least :P
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No problem man, you just had me really confused lol
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Resident Post Whore Polluting the environment one revolution at a time. www.tennspeed.net Quote:
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07-28-2008, 07:38 PM
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#6 |
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i know i cant spell
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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
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07-28-2008, 07:49 PM
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#7 |
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2nd Generation Freak
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why not just use a boost contoller, manual or electric
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'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 |
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07-28-2008, 08:05 PM
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#8 | |
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FUCK the fucking fuckers
Join Date: Mar 2008
Location: THE only Bay Area, Northern California
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Posts: 3,172
Rep Power: 20  |
I was wondering the same thing.
 I figure the wastegate was faulty since he didn't metion anything about a boost controller.
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07-28-2008, 09:18 PM
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#9 |
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I-had-a-bad-experience...
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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 |
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07-28-2008, 09:29 PM
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Mod With The Least :P
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There ya go Paul...Making things all confusing like
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Resident Post Whore Polluting the environment one revolution at a time. www.tennspeed.net Quote:
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07-28-2008, 09:41 PM
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#11 |
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I-had-a-bad-experience...
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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 |
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07-28-2008, 09:50 PM
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Rotary Fanatic
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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.
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My car blows up everytime I start it, it's rotary
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07-28-2008, 10:03 PM
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I-had-a-bad-experience...
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i don't think its a porting problem because when I didn't hook up the wastegate it boosted past 5 easily
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'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 |
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07-28-2008, 10:17 PM
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Mod With The Least :P
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I think you will have this problem with any stock actuator, bigger wastegate porting will cause this regardless IMHO. Get a boost controller
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Resident Post Whore Polluting the environment one revolution at a time. www.tennspeed.net Quote:
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07-29-2008, 08:29 AM
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#15 |
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Rotary Fanatic
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if he plugs the wastegate line, it should go past 10 no problem, theres something else wrong that a boost controller cant fix.
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My car blows up everytime I start it, it's rotary
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