Camshafts? - Page 3 - Toyota Yaris Forums

cali yaris · 07-06-2009, 12:08 AM

I have a set of stock cams (right Tamago? LOL).

I also have a head, but the shipping will kill us.

jkuchta · 07-06-2009, 04:43 AM

Quote:

Originally Posted by suprf1y

OK, so it looks like its a bucket style lifter, no rocker.
Hydraulic, or solid lifters?

I'm pretty sure they're solid shim-over-bucket lifters, with the exhaust cam timing being fixed and the intake cam timing being variable.

eTiMaGo · 07-06-2009, 04:57 AM

you might find more information in here:

http://www.yarisworld.com/forums/att...4&d=1137530385

eTiMaGo · 07-06-2009, 05:09 AM

Quote:

Originally Posted by jkuchta

I'm pretty sure they're solid shim-over-bucket lifters, with the exhaust cam timing being fixed and the intake cam timing being variable.

after reading that PDF again, they are shimless buckets, i.e. to adjust valve lift, you swap for thicker buckets from Toyota...

suprf1y · 07-06-2009, 11:02 AM

Well that pretty much makes it difficult, and unaffordable.
If I had to weld the cores, then grind them to maintain your stock lifter setup, that would make it too expensive.
Sorry guys.

turboecho2005 · 07-06-2009, 12:53 PM

Thanks for trying mike!

cali yaris · 07-06-2009, 01:09 PM

let's keep the discussion open, this is super informative for me, and probably for others.

If Mike is willing?

So when someone like GUDE sells cams for our cars, what exactly did they make then?

kngrsll · 07-06-2009, 01:18 PM

i would love a set of NA cam regrinds

cali yaris · 07-06-2009, 01:47 PM

Doesn't post #41 indicate that you can't do a simple regrind? .. I'm a bit over my head on the technical part of this.

jkuchta · 07-06-2009, 02:55 PM

Quote:

Originally Posted by suprf1y

Well that pretty much makes it difficult, and unaffordable.
If I had to weld the cores, then grind them to maintain your stock lifter setup, that would make it too expensive.
Sorry guys.

I'm pretty sure the buckets aren't that expensive.

Wouldn't it be possible to offset grind the cams on their base circles and then use thicker buckets to take up the slack, thereby giving you more lift without running into coil bind?

yaris-me · 07-06-2009, 04:05 PM

Quote:

Originally Posted by jkuchta

I'm pretty sure the buckets aren't that expensive.

Wouldn't it be possible to offset grind the cams on their base circles and then use thicker buckets to take up the slack, thereby giving you more lift without running into coil bind?

I don't think you want more lift. With VVTi you might end up hitting the piston.

You have four valves already. Wouldn't better intake and exhaust manifolds with porting give more reliable results?

jkuchta · 07-06-2009, 06:32 PM

It could, though higher lift/more duration would also make for better results with an intake and exhaust. Somone will have to measure the "worst case" valve clearance of this motor to be able to tell how crazy you can get on the 1NZ without the valves beating all of the pretty off the pistons, though with lower compression (hint Garm), there'd be even more room for lift, as the piston is either going to be flycut or dished to drop the compression, which would yield more lift potential.

CDavis7M · 07-06-2009, 07:25 PM

I believe that the 1NZ-FE motor is a non-interference design. So, hitting the pistons should not be an issue.

It might be possible to ditch vvti to help with tuning, however, that is a whole other issue. And having an exhaust cam alone might not be worth the hassle.

Tamago · 07-06-2009, 07:34 PM

Quote:

Originally Posted by CDavis7M

I believe that the 1NZ-FE motor is a non-interference design. So, hitting the pistons should not be an issue.

It might be possible to ditch vvti to help with tuning, however, that is a whole other issue. And having an exhaust cam alone might not be worth the hassle.

the 1nz an interference engine.

ditching the VVTI is by far the worst thing you could do to the 1nz

CDavis7M · 07-07-2009, 01:29 AM

Quote:

Originally Posted by Tamago

the 1nz an interference engine.

My mistake. Now I see the reference to the valves hitting the pistons in the Service Manual.

suprf1y · 07-07-2009, 09:53 AM

Quote:

Originally Posted by jkuchta

I'm pretty sure the buckets aren't that expensive.

Wouldn't it be possible to offset grind the cams on their base circles and then use thicker buckets to take up the slack, thereby giving you more lift without running into coil bind?

By all means, see what thicknesses are available, and price them out.
I'll keep an eye on the thread.
Like I said, if I think we can do something, I'm game.
Not sure what you mean by offset grinding the cores.

scape · 07-19-2009, 12:11 PM

this is an exciting thread! ;d hope to see more dev in this area

07-06-2009, 12:08 AM	#37
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	I have a set of stock cams (right Tamago? LOL). I also have a head, but the shipping will kill us. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

07-06-2009, 04:57 AM	#39
eTiMaGo vroom vroom View User's Garage Drives: lil red 5-door Join Date: Sep 2006 Location: Bangkok, Thailand Posts: 7,744	you might find more information in here: http://www.yarisworld.com/forums/att...4&d=1137530385 __________________ The price of freedom of religion, or of speech, or of the press, is that we must put up with a good deal of rubbish. - Robert Jackson Bye bye 1NZ...

07-06-2009, 12:53 PM	#42
turboecho2005 Drives: 2005 Toyota Echo Join Date: Oct 2008 Location: Ottawa, Ontario Posts: 177	Thanks for trying mike! __________________ Project Slowtop - Twin Engine 4AGE Blacktop Vitz - Twin Turbo - 503hp 1987 Nissan Maxima - 40,000 original miles - Slammed 1991 Isuzu Impulse RS AWD Turbo - approx 250hp - Winter Beater 1989 Isuzu Imark RS - Mint Condition - 0 rust - 100% factory :) - Summer Cruiser - 100% restored 1986 VW Jetta Wolfsburg - 120,000km - Mint condition. TDI swap in progress

07-06-2009, 01:09 PM	#43
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	let's keep the discussion open, this is super informative for me, and probably for others. If Mike is willing? So when someone like GUDE sells cams for our cars, what exactly did they make then? __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

07-06-2009, 01:18 PM	#44
kngrsll Apexing Egg!! Drives: 07 Toyota Yaris white hatch Join Date: Oct 2006 Location: Spartanburg, SC Posts: 872	i would love a set of NA cam regrinds __________________ HighTach Motorsports 2007 Toyota Yaris-ARGH!! Mods: Tokico HTS, 6.6 kg F, 6.1 kg R custom springs, 23 mm RSB, 2-way TRD LSD, 15x7 +25 Team Dynamic wheels, 195/55/15 Dunlop Star Specs, Cobra Suzuka S

07-06-2009, 11:02 AM	#41
suprf1y Drives: 05 Echo Join Date: Jul 2009 Location: Waterford Ontario Posts: 131	Well that pretty much makes it difficult, and unaffordable. If I had to weld the cores, then grind them to maintain your stock lifter setup, that would make it too expensive. Sorry guys.

07-06-2009, 01:47 PM	#45
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	Doesn't post #41 indicate that you can't do a simple regrind? .. I'm a bit over my head on the technical part of this. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

07-06-2009, 06:32 PM	#48
jkuchta View User's Garage Drives: 2007 Yaris hatch (red) Join Date: Sep 2007 Location: L.A. Posts: 557	It could, though higher lift/more duration would also make for better results with an intake and exhaust. Somone will have to measure the "worst case" valve clearance of this motor to be able to tell how crazy you can get on the 1NZ without the valves beating all of the pretty off the pistons, though with lower compression (hint Garm), there'd be even more room for lift, as the piston is either going to be flycut or dished to drop the compression, which would yield more lift potential.

07-06-2009, 07:25 PM	#49
CDavis7M Drives: 1990 Supra Turbo Join Date: May 2009 Location: San Diego Posts: 46	I believe that the 1NZ-FE motor is a non-interference design. So, hitting the pistons should not be an issue. It might be possible to ditch vvti to help with tuning, however, that is a whole other issue. And having an exhaust cam alone might not be worth the hassle.

07-19-2009, 12:11 PM	#53
scape View User's Garage Drives: 2007 Yaris Hatchback Join Date: Jul 2007 Location: Beaufort, South Carolina Posts: 388	this is an exciting thread! ;d hope to see more dev in this area

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