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#204680 - July 11, 2003 11:59 am EDT Turbo cams....worth it?
Jeph Milley Offline
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Registered: February 07, 2003
Posts: 531
Loc: Cobourg
ive done some research and this seems like a fairly easy, cheap mod. are there any negative side effects to doing this?? and will the car idle rough? as well what are some noticable upsides to this mod. any feedback appreciated
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#204681 - July 14, 2003 06:40 pm EDT Re: Turbo cams....worth it?
JOSE VEIGA Offline
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Registered: February 09, 2002
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Loc: toronto
Ive always heard that turbo cams werent as agressive as non turbo cams.I would do some more research on it or i could have gotten the wrong info.
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#204682 - July 15, 2003 10:15 am EDT Re: Turbo cams....worth it?
Tim Grechin Offline
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 Quote:
Originally posted by JOSE VEIGA:
Ive always heard that turbo cams werent as agressive as non turbo cams.I would do some more research on it or i could have gotten the wrong info.
Wrong info it is. The turbo cams are more agressive. Or should I say cam. The intake cam is more agressive on the turbo 1G. Just as long as it's from a 91-94 Turbo 5-speed.
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#204683 - July 15, 2003 12:07 pm EDT Re: Turbo cams....worth it?
Jeph Milley Offline
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Registered: February 07, 2003
Posts: 531
Loc: Cobourg
Tim,so is what your saying is that putting in a turbo intake cam would be beneficial?? and if so would my car idle rough,and cause more disadvantages
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2002 RSX Type S- Not stock....

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#204684 - July 15, 2003 01:19 pm EDT Re: Turbo cams....worth it?
Tim Grechin Offline
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Sit in a turbo car. That's what it feels like generally. It pulls harder. Why do you think better cams have higher lifts and longer durations?
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#204685 - July 17, 2003 07:24 am EDT Re: Turbo cams....worth it?
Inder Minhas Offline
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Registered: February 21, 2002
Posts: 36
Loc: Toronto
Hi Tim. If I understand correctly you wish to install turbo cams on a non turbo, this would make your car slower. Even if the lift and duration profile is more aggressive the lobe seperation between intake and exhaust will be greater than your non-turbo cams. Forced induction cams narrow the lobe seperate so the forced induction does not blow through the exhaust instead of filling the cylinder. Whereas on NA the exhaust creates a vacuum to suck in the intake charge.

It is like the difference between Vtec and non-Vtec on a Honda. Non-Vtec power band is torque but can not rev-fast or at high rpms (if you manually disconnect the solenoid), the Vtec however can rev high. Sorry about the Honda analogy.

You might want to confirm the lobe seperate before you do this mod, or get cam gears and hope you can narrow the seperation.

IM

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#204686 - July 17, 2003 02:26 pm EDT Re: Turbo cams....worth it?
Chris Clark Offline
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Registered: February 16, 2003
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Loc: Regina, Sk
I havent heard of any idling problems, but every car is different. The cams definetly will make a difference.

Check out NT.DSM.ORG for some good Turbo cam info.
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#204687 - July 18, 2003 09:22 am EDT Re: Turbo cams....worth it?
Jeremy Chin Offline
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Registered: March 19, 2001
Posts: 2787
Loc: Malaysia
?

There is nothing much there..

Am I missing something or some page? All I see is a few ppl asking how TSi cams will run, but lacks any sort of feedback from people that have them installed.

Chris, you have TSi cams in your ride? you want to share your experience with it?
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#204688 - July 18, 2003 04:10 pm EDT Re: Turbo cams....worth it?
Chris Clark Offline
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No I dont have them, but a guy on NT.DSM.ORG says they pull way better in the top end, where as the n/t cams drop off at about 6000rpm, my power even drops off a tad earlier.
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#204689 - July 18, 2003 05:24 pm EDT Re: Turbo cams....worth it?
Paul Kruger Offline
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Registered: October 09, 2002
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Not to step on any toes, and I may be way off base here, but traditionally...

N/A Cams in reasonbly high performing engines ended up with additional overlap and longer durations than there turbo brethren. In fact, in the Toyota world you could pick up a number of ponies by switching Turbo cams for N/A cams in the turbo cars. Unfortunatly the overlap created blow-by and a loss of low end torque, but top-end performance increased significantly.

And conversely, i've personally watched an N/A Celica make a dyno run with Turbo cams and pick up 3-4ft pounds of torque in the bottom end, but lose more than 10hp by 5,000rpm.

What portion of the turbo cams are more agressive? More lift? Duration?

Paul

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#204690 - July 18, 2003 07:01 pm EDT Re: Turbo cams....worth it?
Jeremy Chin Offline
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Registered: March 19, 2001
Posts: 2787
Loc: Malaysia
I was thinking the same thing too.

N/T cams have overlap to encourage scarvenging...it allows the engine to breath better.

I dont think by just changing cams you are going to get more power..you are just moving the power band up higher. And how would the ECU know what cams you installed and "fix" itself?
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Back to another Mits.
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#204691 - July 28, 2003 11:48 pm EDT Re: Turbo cams....worth it?
Chandler Ole Offline
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Registered: July 27, 2003
Posts: 134
Loc: Edmonton
I've had 93 turbo 5-spd cams for about 5 months, and they do add power. My engine used to die after 6000, now it pulls to 6500rpm.
I recomened it, UDP is also a good mod for the money.
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#254807 - January 29, 2008 06:14 pm EST Re: Turbo cams....worth it? [Re: Chandler Ole]
brendan warwick Offline
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So, do n/t cams help turbo cars?? maybe gives lower end torque?
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#254808 - January 29, 2008 06:21 pm EST Re: Turbo cams....worth it? [Re: brendan warwick]
Tim Grechin Offline
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 Originally Posted By: brendan warwick
So, do n/t cams help turbo cars?? maybe gives lower end torque?


No. This is regarding turbo cams in a n/t engine, not visa versa.

Look at the profile of a n/t cam. It is the same as a 90 turbo cam. The 91-94 cams are more agressive in terms of lobe height.
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#255403 - February 04, 2008 07:08 pm EST Re: Turbo cams....worth it? [Re: Tim Grechin]
Mike Kuttschrutter Online   sick
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OK, if the 90 turbo cam is the same as a n/t cam...
If I swap out my 90 turbo cams for 91-94 NT cams is that any different?
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#255568 - February 06, 2008 08:12 pm EST Re: Turbo cams....worth it? [Re: Mike Kuttschrutter]
Tim Grechin Offline
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 Originally Posted By: michael kuttschrutter
OK, if the 90 turbo cam is the same as a n/t cam...
If I swap out my 90 turbo cams for 91-94 NT cams is that any different?


Yes
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#255678 - February 07, 2008 10:47 pm EST Re: Turbo cams....worth it? [Re: Tim Grechin]
brendan warwick Offline
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Ok remember I pm'ed you about this Tim, here is where I heard it I know you say its not, but this is what led me to believe it.

1g NT cams and gears
These have a lift of 256 as opposed to stock turbo cams of 248.
Half way to 264 cams for a fraction of the price
Great Cheap Upgrade with noticible results
$50 for the pair
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#255681 - February 07, 2008 10:55 pm EST Re: Turbo cams....worth it? [Re: brendan warwick]
Steve Kinnaird Offline


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I haven't "dug into" the various stock cams much, but you need to know lift, and duration to decide what you want.

You've listed duration (not lift), but do you know what the lift is? If it's lower, the longer duration might not do you any good. (Or, could be worse).

Also, is that for the intake cam, exhaust cam, or both?

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#255687 - February 07, 2008 11:25 pm EST Re: Turbo cams....worth it? [Re: Steve Kinnaird]
brendan warwick Offline
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I am not sure as I found this in the for sale fourm, and I have a set of n/t cam. I have looked with no luck.
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#255734 - February 08, 2008 04:53 pm EST Re: Turbo cams....worth it? [Re: brendan warwick]
Tim Grechin Offline
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Haynes manual has the specs on the cams. They miced them out and posted their sizes. My book in burried in a pile of junk and I'm not going to look but I'm positive that guy is wrong.
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#255836 - February 09, 2008 10:43 pm EST Re: Turbo cams....worth it? [Re: Tim Grechin]
Stephen Richardson Online   content
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The Haynes manual just tells you lob height.90 -92 are the same for turbo and n/t but that doesnt mean lift duration or even overlap are the same.

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#255861 - February 10, 2008 01:05 pm EST Re: Turbo cams....worth it? [Re: Stephen Richardson]
Scotty Mac Offline
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Registered: August 30, 2002
Posts: 313
Loc: Saint John New Brunswick
Here's the specs on the Brian crower site. It lists stock turbo and non specs.

http://www.briancrower.com/makes/mitsubishi/4g63.shtml
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#255998 - February 12, 2008 12:20 pm EST Re: Turbo cams....worth it? [Re: Scotty Mac]
Rafael Pimentel III Offline
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Nice Link.

I remember seeing that NT Intake cams were 256 years ago but I didn't remember where.

It also seems that the NT exhaust cam has a slightly more aggressive duration as compared to the turbo exhaust cam.
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#256140 - February 13, 2008 05:13 pm EST Re: Turbo cams....worth it? [Re: Rafael Pimentel III]
Tim Grechin Offline
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 Originally Posted By: Rafael Pimentel III

I remember seeing that NT Intake cams were 256 years ago but I didn't remember where.


1752? That's an old cam!
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#257904 - March 02, 2008 11:54 am EST Re: Turbo cams....worth it? [Re: Tim Grechin]
John Hartman Offline
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Registered: June 09, 2002
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The Brian Crower listings actually show the N/T cams as equal or better in all but one very minor spot.

Now, contrary to that, I put 92 Turbo "C" and "D" grind cams in my Galant N/T 4g63 and it had a noticable power increase from around 3200 rpm and pulled to 6000 rpm now. Previously with stock cams it wold work from about 3000 and fall on its face at 5000.
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#327582 - April 03, 2010 09:28 am EDT Re: Turbo cams....worth it? [Re: John Hartman]
Jonathan Beaton Offline
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Registered: March 16, 2010
Posts: 8
Loc: Victoria BC
There is MUCH more to cams than lift an duration. Changing your cam profiles moves your power band around more than adds/subtracts power. When modifying your cams think more about where on the powerband you want to make the power. Keep in mind that it's easier to make power at higher RPMs.

Here is some info on what camshafts do for your motor and what effect changing them will have on your overall performance. It's for the 4AG but the rules apply to all of us.

http://www.club4ag.com/faq_and_tech_pages/4A-GE%20camshaft_story.htm

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#327584 - April 03, 2010 09:47 am EDT Re: Turbo cams....worth it? [Re: Jonathan Beaton]
Ryan Laliberte Offline

No-Lift-To-Shift.... Stock. :)
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Wow, way to bring back a thread that's 2 years old.
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