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Actuator size for T34?? -31 or -34

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Old 10-04-2008, 09:13 AM
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rog
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Default Actuator size for T34?? -31 or -34

Forgive my ignorance for what seems like a daft and very basic question, i've been on the cossie scene for a long time but never had the "need" for a -34 so i never read about them. Now I'm thinking of upgrading to a t34, do i need a different actuator or can i use the -31???
I take it that it's just the spring that's different if i had to hazard a guess.
Old 10-04-2008, 09:53 AM
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ECOS95
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-31 or -34 use different springs to hold the wastegate shut longer so the turbo produes more bost in simple terms. -34 has a stronger spring so it will depend on what boost you intend to run.

Last edited by ECOS95; 10-04-2008 at 09:54 AM.
Old 10-04-2008, 09:56 AM
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Ok cheers, thought as much, thanks!
Old 10-04-2008, 10:51 AM
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Ridgey
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Since it's a t34 i assume you'll be running over 20 psi, so i think best to use -34 as it's base opening pressure is about 14/15 psi i believe.

If you were running near this or lower a -34 would be no use as it would not open the wastegate to maintain the pressure you desire.

Well thats my understanding of it anyway.
Old 10-04-2008, 11:03 AM
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Stu @ M Developments
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Note that a T34 uses a totally different actuator style than the earlier cars.
Old 10-04-2008, 01:41 PM
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Ok stu and Dave, thanks for that, desperate to get the car all legal so i can actually drive it! Once it's run in then i'm swappibng over to a T34 so that's all good to know!
Old 10-04-2008, 01:42 PM
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CossieRich
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-34 on mine

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Old 10-04-2008, 07:51 PM
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KSA-Cossie
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Mine too.
Old 10-04-2008, 07:58 PM
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mechanic28
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-34 ere as well
Old 10-04-2008, 08:08 PM
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SS1
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and me

T34.63 -34 Actuator

flying machine
Old 10-04-2008, 09:22 PM
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KSA-Cossie
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T34.63 -34 Actuator and lots of boost makes a flying machine
Old 10-04-2008, 09:51 PM
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HKS EVC V Boost control system on the dash. 3 levels of boost(14/24/34)

Last edited by SS1; 10-04-2008 at 10:43 PM. Reason: edit
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