Turbo Question
04-21-2013, 05:11 PM
#1
Registered User
Thread Starter
Join Date: Feb 2013
Posts: 10
Turbo Question
Hey everyone whats up! So i have a 91 300zx w/ 78k miles and the car originally was a automatic and then they switched it over to a manual. Now Both my turbo's blew and im about to buy a new pair of OEM's but its asking me if i want (manaual) or (auto) turbo's? Im not 100% if the guy switched the turbo's over when he did the tranny?
Either way im just wondering what type i should buy since my car was both. Thanks for reading and helping guys!
Either way im just wondering what type i should buy since my car was both. Thanks for reading and helping guys!
04-21-2013, 07:53 PM
#2
A/R trim
Each of the Turbo types were dialed in for the transmission used, they should interchange mechanically, since you are now running a manual, I would assume you would want the turbo biased for that application, although I bet either would work.
M/T cars had turbos with an A/R trim of .63. A/T cars, .54.
A larger A/R will spool later and provide a higher power band.
Probably the lower A/R on automatics was used to help the auto spool a little faster and keep the rpm's lower to protect the engines from over revving on shifts. My best guess, I am by no means a turbo expert, so if anyone can shed more light on this please chime in.
M/T cars had turbos with an A/R trim of .63. A/T cars, .54.
A larger A/R will spool later and provide a higher power band.
Probably the lower A/R on automatics was used to help the auto spool a little faster and keep the rpm's lower to protect the engines from over revving on shifts. My best guess, I am by no means a turbo expert, so if anyone can shed more light on this please chime in.
04-26-2013, 09:47 PM
#3
Registered User
Thread Starter
Join Date: Feb 2013
Posts: 10
Each of the Turbo types were dialed in for the transmission used, they should interchange mechanically, since you are now running a manual, I would assume you would want the turbo biased for that application, although I bet either would work.
M/T cars had turbos with an A/R trim of .63. A/T cars, .54.
A larger A/R will spool later and provide a higher power band.
Probably the lower A/R on automatics was used to help the auto spool a little faster and keep the rpm's lower to protect the engines from over revving on shifts. My best guess, I am by no means a turbo expert, so if anyone can shed more light on this please chime in.
M/T cars had turbos with an A/R trim of .63. A/T cars, .54.
A larger A/R will spool later and provide a higher power band.
Probably the lower A/R on automatics was used to help the auto spool a little faster and keep the rpm's lower to protect the engines from over revving on shifts. My best guess, I am by no means a turbo expert, so if anyone can shed more light on this please chime in.
04-26-2013, 10:06 PM
#4
To be safe
I would get the proper one for the transmission you currently have, the auto is long gone, Nissan did the research for a proper fit, form and function, I would rely on they're R&D, go with the manual version.... to be safe.
05-02-2013, 09:38 PM
#5
Registered User
Join Date: Nov 2011
Location: Minnesota
Posts: 30
Keep in mind that your engine is still from an Auto TT. This means you have lower duration cams which will effect spool up and power band. I don't recommend rebuilt OEM turbos, they don't tend to last very long. I would at least get Z1's GT535 Kit as a replacement as your talking your engine out anyways.
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