wastegate helper spring
#1
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wastegate helper spring
Hey Folks,
Does anybody have any experience with adding a wastegate helper spring to the stock wastegate. I have a bnr stage2 hybrid and and can't seem to get any boost past 10psi.
I've installed a manual boost controller and turning it up higher doesn't have any effect.
I thought my bov was leaking so I added a washer to it and that had no effect. Made it sound higher pitched and not go off under vacuum as much.
Any ideas?
Does anybody have any experience with adding a wastegate helper spring to the stock wastegate. I have a bnr stage2 hybrid and and can't seem to get any boost past 10psi.
I've installed a manual boost controller and turning it up higher doesn't have any effect.
I thought my bov was leaking so I added a washer to it and that had no effect. Made it sound higher pitched and not go off under vacuum as much.
Any ideas?
#7
talking head
i have done the helper spring mod several times
-- and currently use a HKS adjustable ( shorter = more boost ) pot,, WITH a helper spring
( the extra/dual spring helps to smooth out operation as well as increase boost,, unlike pneumatic bleeds that can bring unwanted spike/overshoot/overcontrol effects )
the install in the car ATM didnt bring up any decent pics,, so i took some shots of the turbos i have in the shed instead to illustrate the various methods of adding a spring
the method involves drilling a hole in the pots edge ( not in the diaphram part )
and another at the end of the shaft
( or alternately add a plate or nut at some point along the shaft )
-- the ones with plate ( many adjusting holes ) or the nut are intended to run the spring across a 45 angle as the hypotinous
(so the springs effect is not quite as its rating )
the ones with hole tapped into the shaft near the C clip are intended to use a spring that is installed ALONG ( over ) the shaft
-- that is the spring works at a true rating to supplement the original
( spring not shown )
the nut added to shaft and hole tapped into the can edge
-plainly the shaft has rotated 180 to its intended position
( springs not shown )
this one is universal,, originally built to take the spring wound along the shaft
( note holes in can edge )
later it had the small alum bracket added and the spring run as hypotinous
( the original added spring failed and this was added in car to fix )
( springs not shown )
lower can has a hinge plate welded to the shaft ( in preference to a nut )
to provide many settings
the upper can used the original spring along shaft technique
NB
s5 can/arm with the kink is much better suited to spring along shaft technique due to the kink
PS
-- if welding anything to the shaft ( plate or nut or adjuster or shorten/lengthen )
you need to submerge the can into a bucket ( with shaft out ) before you weld
( obviously the heat can ruin the diaphragm )
-- and currently use a HKS adjustable ( shorter = more boost ) pot,, WITH a helper spring
( the extra/dual spring helps to smooth out operation as well as increase boost,, unlike pneumatic bleeds that can bring unwanted spike/overshoot/overcontrol effects )
the install in the car ATM didnt bring up any decent pics,, so i took some shots of the turbos i have in the shed instead to illustrate the various methods of adding a spring
the method involves drilling a hole in the pots edge ( not in the diaphram part )
and another at the end of the shaft
( or alternately add a plate or nut at some point along the shaft )
-- the ones with plate ( many adjusting holes ) or the nut are intended to run the spring across a 45 angle as the hypotinous
(so the springs effect is not quite as its rating )
the ones with hole tapped into the shaft near the C clip are intended to use a spring that is installed ALONG ( over ) the shaft
-- that is the spring works at a true rating to supplement the original
( spring not shown )
the nut added to shaft and hole tapped into the can edge
-plainly the shaft has rotated 180 to its intended position
( springs not shown )
this one is universal,, originally built to take the spring wound along the shaft
( note holes in can edge )
later it had the small alum bracket added and the spring run as hypotinous
( the original added spring failed and this was added in car to fix )
( springs not shown )
lower can has a hinge plate welded to the shaft ( in preference to a nut )
to provide many settings
the upper can used the original spring along shaft technique
NB
s5 can/arm with the kink is much better suited to spring along shaft technique due to the kink
PS
-- if welding anything to the shaft ( plate or nut or adjuster or shorten/lengthen )
you need to submerge the can into a bucket ( with shaft out ) before you weld
( obviously the heat can ruin the diaphragm )
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#9
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I shortened the rod up a bit this morning and it didn't seem to have any effect I didn't max it all the way out though. I will try capping off the wastegate line to see what that does.
#10
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shortened the rod up even further and still no change. I need to fix an issue with the throttle getting stuck on the floor before doing anything else (think its getting caught on the carpet) I data logged a run and it looked like it was trying to go to 11psi on my boost gauge but I had to keep my eyes on the road not on the gauge.