North American Turbocoupe Organization



Picked up an svo😂
boosted85 Offline
Senior Member
#1
Okay to start off I picked up Chris Roth's old SVO still has everything on it except the 95lbs injectors however it still has 4-inch mass air the hy35 turbo. No my question is it supposably has a 15 pound wastegate however anytime I get into boost it goes well over 25 and thecar runs lean so I back out of it. But if you hold the throttle about halfway it runs adequate as long as it's under 20 pounds of boost. So dio the hy35's have an over boosting prob i can fix or should i try my 96lb injectors and get that moates chip tuned for them?
Complete custom downpipe to tail pipe 3in exhaust, ranger cam, cran double valve springs, stock dsm bov switchin out for a good aftermarket, cone filter, fmi 2.5in piping, walbro 342hp, aeromotive fpr, fuel pressure 45 base, 17in cobra R's, steel braided oil feed line, 96lb injectors, megasquirt 1 v2.2, msd blaster 2 coil 86 t3 48, innovative lc1 wideband,
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boosted chicken Offline
Senior Member
#2
Just because the WG has a 15lb spring doesn't mean that the controller is set for 15psi. What kind of boost controller, manual or electronic? Internal or external wastegate?

The early HY35's can suffer from boost creep but not sure that is your case. Does it slam up to 25+ or does it come up to 15 pretty quick and then slowly start rising?

88 TC#1 Boport stg 3 alum dport head, PT6466, Boport header, CP pistons, Crower rods, MS2xtra
88 TC#2 drag car project(someday)
88 TC#3 parts car (just needed the header panel...bought the whole car, lol)
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boosted85 Offline
Senior Member
#3
No boost controller, and it just gets to 10psi for a sec then shoots to 25+
Complete custom downpipe to tail pipe 3in exhaust, ranger cam, cran double valve springs, stock dsm bov switchin out for a good aftermarket, cone filter, fmi 2.5in piping, walbro 342hp, aeromotive fpr, fuel pressure 45 base, 17in cobra R's, steel braided oil feed line, 96lb injectors, megasquirt 1 v2.2, msd blaster 2 coil 86 t3 48, innovative lc1 wideband,
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boosted chicken Offline
Senior Member
#4
No boost controller? I would at least put a Gillis valve on it.

What kind of wastegate, external or the Holset one? And is it using the factory Holset wastegate actuator if it is the internal gate?

88 TC#1 Boport stg 3 alum dport head, PT6466, Boport header, CP pistons, Crower rods, MS2xtra
88 TC#2 drag car project(someday)
88 TC#3 parts car (just needed the header panel...bought the whole car, lol)
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boosted85 Offline
Senior Member
#5
Internal holset from what i know the original
Complete custom downpipe to tail pipe 3in exhaust, ranger cam, cran double valve springs, stock dsm bov switchin out for a good aftermarket, cone filter, fmi 2.5in piping, walbro 342hp, aeromotive fpr, fuel pressure 45 base, 17in cobra R's, steel braided oil feed line, 96lb injectors, megasquirt 1 v2.2, msd blaster 2 coil 86 t3 48, innovative lc1 wideband,
Reply

boosted chicken Offline
Senior Member
#6
Hmmm..if it is using the factory WG actuator, I believe those are set at something like 21psi.

I had boost creep on my HY35 back in the day. Enlarging the wastegate hole so the wastegate puck barely covered it helped quite a bit.
88 TC#1 Boport stg 3 alum dport head, PT6466, Boport header, CP pistons, Crower rods, MS2xtra
88 TC#2 drag car project(someday)
88 TC#3 parts car (just needed the header panel...bought the whole car, lol)
Reply





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