na cam

M

madseacow

New Member
Apr 2, 2005
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do I gain from both na cams or just the intake side? I have the intake side so what could I expect to gain (and loose) from installing this?
 
Squid699

Squid699

Manic Mechanic
Mar 30, 2005
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Chesapeake, VA
my understanding is that the exhaust cam is the same, and the intake for the NA has a slightly longer duration. For moderate or low HP applications this provides a small gain at the lower end, but doesn't do anything, and possibly hinders performance in higher HP applications.
 
S

Shawndude

New Member
Mar 30, 2005
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Van BC
Squid699 said:
my understanding is that the exhaust cam is the same, and the intake for the NA has a slightly longer duration. For moderate or low HP applications this provides a small gain at the lower end, but doesn't do anything, and possibly hinders performance in higher HP applications.
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Correct, apart from that the N/A intake cam has shorter duration than the turbo (and tiny bit less lift). Unless you're after better gas mileage out of your car, I wouldn't bother with it again.
 
Jeff Lange

Jeff Lange

Administrator
Staff member
Mar 29, 2005
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There are 5 cam part numbers for the Supra, take from this message whatever you want, heh:

Intake:
13501-42020 - 86-87 N/A Intake Cam (38.36mm Lift (I think, I'm not 100% sure on that, can someone with an 87 TSRM check that for me?))
13501-42030 - 88-92 N/A Intake Cam (38.16mm Lift)
13501-42010 - Turbo Intake Cam (38.35mm Lift)

Exhaust:
13502-42020 - 86-87 N/A Exhaust Cam (38.36mm Lift)
13502-42010 - 88-92 N/A Exhaust Cam & Turbo Exhaust Cam (38.35mm Lift)

I have no duration information though.
 
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