Toda Camshaft timing with VVT

Jan Pedersen
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Posts: 18
Joined: Fri Jan 11, 2013 10:12 pm

Toda Camshaft timing with VVT

Postby Jan Pedersen » Thu Oct 24, 2013 11:12 am

I am having a little trouble finding out how to get the valve timing just right before going to the dyno. Bryan aka jdm86gtz was kind enough to send a copy of Todas cam card. Unfortunately its in Japanese so I find quite hard to read ;)
Image

So to make sure I got this right, here is the question:
To me it seems that the intake cam has to be set at 125 degrees and exhaust 100 degrees?
I used the original BT VVT cam gear and got 123 degrees. And with the VVT on that change the timing to ~93 degrees, right? The car is already running quite nicely so I'm pretty sure I'm close but I just don't want to waste much time on the dyno...

Cams are 272/9.2 both in and out BTW...

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jondee86
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Re: Toda Camshaft timing with VVT

Postby jondee86 » Fri Oct 25, 2013 7:28 am

Just looking at the numbers on the cam card I see...

INTAKE CAM
OPEN 11.5 ATDC
CLOSE 58.5 ABDC
LOBE CENTRE 125 ATDC (assume symmetrical lobe)
DURATION 227 (at some opening less than 1mm)

The minus sign in front of the 11.5 is a bit confusing ?? The figures only
add up if this is 11.5 ATDC. The cam card indicates that these figures are
for 264 degrees duration (advertised) x 9.00mm lift cams. If you have
272 degree cams, then I would expect the numbers to be slightly different.

However, if the cams are designed to be used with VVT I would also expect
that they would "drop in" at the correct timing when used with the factory
VVT pulley. Pure guesswork of course :)

Cheers... jondee86
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