B6T 323 GTX Camshaft? - Miata Turbo Forum - Boost cars, acquire cats.

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Old 05-24-2009, 04:02 PM   #1
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Default B6T 323 GTX Camshaft?

I would get original 323 GTX 1,6i Turbo camshaft.

I have an 1.6er Miata Turbo.

Is there a big different between the Turbo camshaft from the gtx and the 1.6er Miata Camshaft? Are the GTX Camshafts a little bit better?

Could someone give me an advice?

Last edited by jonny; 05-24-2009 at 04:17 PM.
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Old 08-04-2010, 01:55 PM   #2
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Nobody had never answered this?

I would like to do the same, is it worth it?
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Old 08-04-2010, 01:56 PM   #3
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WAY less overlap, better for boost for sure.

http://solomiata.com/cams.html

looks like the intake cam might be the same (however the lift may be different), the difference is the exhaust valve opens a little sooner in the cycle but closes sooner as well.



freaking third time I've used that link today already.
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Old 08-04-2010, 02:06 PM   #4
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Quote:
Originally Posted by Braineack View Post
WAY less overlap, better for boost for sure.

http://solomiata.com/cams.html

looks like the intake cam might be the same (however the lift may be different), the difference is the exhaust valve opens a little sooner in the cycle but closes sooner as well.



freaking third time I've used that link today already.
Find out if the Capri Turbo was the same?
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Old 08-04-2010, 02:12 PM   #5
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I read the solomiata page, and I can easily have access to an old GTX B6T, so it might be worth to try!
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Old 08-04-2010, 03:30 PM   #6
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Intake cams are the same. Exhaust cam is pretty close to the same but timed differently for less overlap.

Bob
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Old 08-04-2010, 03:34 PM   #7
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so, it's not worth it, better go with a adjustable cam gear?
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Old 08-04-2010, 03:35 PM   #8
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Unless it's really cheap I'd imagine you could acheive the same effect, or better, with an adjustable cam gear on the intake cam.
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Old 08-04-2010, 03:43 PM   #9
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if the B6T cam would do something about the exhaust, why would I need an adjustable cam gear on the intake?

Will both do a better job?
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Old 08-04-2010, 03:51 PM   #10
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If you can source me a GTX exhaust cam I'll fit it and tell you how it goes. Hell I'd even be compelled to dyno before and after.
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Old 08-04-2010, 03:57 PM   #11
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Quote:
Originally Posted by Braineack View Post
If you can source me a GTX exhaust cam I'll fit it and tell you how it goes. Hell I'd even be compelled to dyno before and after.
If someone funds my dyno time I bet bob would sell me one of his spare GTX exhaust cams
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Old 08-04-2010, 04:03 PM   #12
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If someone can confirm if a Capri turbo motor is identical.... i'll rip the cam caps off the one in the garage and see if its healthy.
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Old 08-04-2010, 04:03 PM   #13
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Quote:
Originally Posted by absRTP View Post
if the B6T cam would do something about the exhaust, why would I need an adjustable cam gear on the intake?

Will both do a better job?
You could retard the intake cam, reducing overlap just the same, while keeping the higher lift B6 cams.

This also means that both cams are retarded compared to the B6T setup, which can be advantageous at higher rpms.
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Old 08-04-2010, 04:04 PM   #14
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Quote:
Originally Posted by Splitime View Post
If someone can confirm if a Capri turbo motor is identical.... i'll rip the cam caps off the one in the garage and see if its healthy.
I would say yes from what I've read on the BG's forums... the Capri turbo have the same B6T as the 323 GTX does
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Old 08-04-2010, 04:06 PM   #15
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Quote:
Originally Posted by absRTP View Post
I would say yes from what I've read on the BG's forums... the Capri turbo have the same B6T as the 323 GTX does
it would make sense if it was a turbo motor it would have the turbo cams.
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Old 08-04-2010, 04:07 PM   #16
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Quote:
Originally Posted by gospeed81 View Post
You could retard the intake cam, reducing overlap just the same, while keeping the higher lift B6 cams.

This also means that both cams are retarded compared to the B6T setup, which can be advantageous at higher rpms.
but what if the GTX exhaust cam had more duration? ha
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Old 08-04-2010, 04:10 PM   #17
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good point!
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Old 08-04-2010, 04:13 PM   #18
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Quote:
Originally Posted by Braineack View Post
it would make sense if it was a turbo motor it would have the turbo cams.
Yah, but you never know what manufacturers pull :P
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Old 08-04-2010, 04:19 PM   #19
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Quote:
Originally Posted by Splitime View Post
Yah, but you never know what manufacturers pull :P
no, but I'm pretty sure is a B6T
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Old 08-04-2010, 04:20 PM   #20
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Quote:
B6T
1,597 cc (1.597 L; 97.5 cu in) B6T - (78x83.6 mm) - The ubiquitous turbocharged, fuel-injected and intercooled 16-valve DOHC B6, released in 1985 and used in numerous models worldwide including the 323 GT-X, 1985-1989 Mazda Familia GT-X/GT, 1985-1989 Ford Laser TX3 turbo, and later Mercury Capri's. This engine was most commonly found mated to a 4WD drivetrain although FWD models were also available in the capri XR2 & 323 GT.

Power and torque outputs varied across markets due to emission and fuel standards.

The B6T available in north america came with 132 hp (98 kW) & 136 lbft (184 Nm)

The Japanese version of the B6T was the most powerful, producing 147 hp (110 kW) and 137 lbft (186 Nm) due to better intake manifold & ecu tuning for better gasoline 95 octane

source : http://en.wikipedia.org/wiki/Mazda_B_engine#B6T
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