Variable valve timing on colorados? - Chevy Colorado & GMC Canyon
 
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post #1 of 18 (permalink) Old 07-16-2008, 06:16 PM Thread Starter
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Variable valve timing on colorados?

Does anyone now of a company that makes them for colorados? i have driven some cars that have them and all i have to say is WOW!
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post #2 of 18 (permalink) Old 07-16-2008, 06:18 PM
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Re: Variable valve timing on colorados?

The Colorado has variable timing on the exhaust valve but not the intake valves.

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post #3 of 18 (permalink) Old 07-16-2008, 06:26 PM
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Re: Variable valve timing on colorados?

Quote:
Originally Posted by CALIRADO5
Does anyone now of a company that makes them for colorados? i have driven some cars that have them and all i have to say is WOW!


What a question.

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post #4 of 18 (permalink) Old 07-16-2008, 07:02 PM
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Re: Variable valve timing on colorados?

LOL. VTEC yo.
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post #5 of 18 (permalink) Old 07-17-2008, 02:44 PM
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Re: Variable valve timing on colorados?

wow. just wow. Just when you think you've seen it all.......

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post #6 of 18 (permalink) Old 07-18-2008, 03:59 PM
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Re: Variable valve timing on colorados?

Quote:
Originally Posted by CALIRADO5
Does anyone now of a company that makes them for colorados?
I think Chevrolet does?

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post #7 of 18 (permalink) Old 07-19-2008, 02:33 PM
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Re: Variable valve timing on colorados?

sorry to jump in and be an ass, but dear god man what a dumb question.

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post #8 of 18 (permalink) Old 07-19-2008, 10:08 PM
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Re: Variable valve timing on colorados?

The dingo ate your signature, fruit cake.

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post #9 of 18 (permalink) Old 07-21-2008, 08:35 PM
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Re: Variable valve timing on colorados?

I believe the word KNOW is left out in the sentence.


How does this Varible exhaust valve timing work. I'm interrested in how the electroinc side works, i know that the solenoid is a control valve and a hydraulic actuator.

What i want to know is, if i can control the pulses to the solenoid, would i get better Rpms or a diffrent torque band.

When is the VVT activated?

And is the VVT the reason for the Dohc engine to run so hot, exhaust temp.
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post #10 of 18 (permalink) Old 07-21-2008, 09:26 PM
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Re: Variable valve timing on colorados?

Quote:
Originally Posted by Exousia
I believe the word KNOW is left out in the sentence.


How does this Varible exhaust valve timing work. I'm interrested in how the electroinc side works, i know that the solenoid is a control valve and a hydraulic actuator.

What i want to know is, if i can control the pulses to the solenoid, would i get better Rpms or a diffrent torque band.

When is the VVT activated?

And is the VVT the reason for the Dohc engine to run so hot, exhaust temp.
Google is your friend for your questions.

And DOHC engines running hot? I'd like to know what your definition of hot is.
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post #11 of 18 (permalink) Old 07-21-2008, 11:09 PM
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Re: Variable valve timing on colorados?


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post #12 of 18 (permalink) Old 07-22-2008, 02:18 PM
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Re: Variable valve timing on colorados?

I thought for sure valve timing via extra space terrestials would be here by now, guess not, my bad :)

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post #13 of 18 (permalink) Old 07-22-2008, 11:07 PM
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Re: Variable valve timing on colorados?

I may be wrong, don't Dohc egt temps run a bit hotter than sohc egt's... Sorry just a shot in the dark...

Just tring to quiet the coloy a bit...
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post #14 of 18 (permalink) Old 07-22-2008, 11:47 PM
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Re: Variable valve timing on colorados?

Quote:
Originally Posted by Exousia
I may be wrong, don't Dohc egt temps run a bit hotter than sohc egt's... Sorry just a shot in the dark...

Just tring to quiet the coloy a bit...

Different engines operate better at different temperatures. It has nothing really to do with OHV, DOHC, SOHC, two stroke, etc.

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post #15 of 18 (permalink) Old 07-28-2008, 02:34 AM
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Re: Variable valve timing on colorados?

But maybe he was trying to ask if there was a way to get the variable valve timing to change to a more agressive tune.

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post #16 of 18 (permalink) Old 07-28-2008, 03:26 AM
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Re: Variable valve timing on colorados?

Quote:
Originally Posted by kenadak1
But maybe he was trying to ask if there was a way to get the variable valve timing to change to a more agressive tune.

Maybe... like a VTEC controller maybe?

First off we need to understand the differences from our VVT and Honda's VTEC. Our VVT bascially pulses a solenoid that allows oil pressure to enter a drum which then advances or retards the exhaust camshaft basically making the exhaust valves open sooner or later than the rest of the motor for various reasons including power and emissions.

Honda's VTEC is different than that, they don't have variable cam timing, they have variable cam lift meaning theres 2 seperate set of lobes on the cams that under certain conditions, oil pressure pulls the cams sideways and makes the more aggressive lobes open the valves. This is more for higher RPMs where more HP is needed instead of torque with the other lobes. Some folks like to activate the VTEC sooner with a manual controller, maybe that was his question? Answer is no, not the same however HP Tuners can control some VVT stuff.

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post #17 of 18 (permalink) Old 08-13-2008, 02:50 AM
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Re: Variable valve timing on colorados?

hahaha thats all i have to say about that poor honda vtec explanation. but for all intensive purposes yes, the colorados dont have variable valve lift...only VVT
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post #18 of 18 (permalink) Old 08-13-2008, 02:59 AM
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Re: Variable valve timing on colorados?

And for the record the new Nissan Motors specifically the HR37DE in the 350Z and G37s have both variable valve timing and variable valve lift only their valve lift is fully adjustable by adjuting the lifters unlike Honda who uses 2 sets of lobes for only one lift change.

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