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Turbo cams....worth it? #204680
July 11, 2003 03:59 pm UTC
July 11, 2003 03:59 pm UTC
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Cobourg
Jeph Milley Offline OP
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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


2002 RSX Type S- Not stock....

1993 Eagle Talon-RIP
Re: Turbo cams....worth it? #204681
July 14, 2003 10:40 pm UTC
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JOSE VEIGA Offline
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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.


1997 ram air trans am
former DSM owner
http://www.angelfire.com/extreme4/copper90tsiawd/index.html
Re: Turbo cams....worth it? #204682
July 15, 2003 02:15 pm UTC
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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.


11.254@132.14MPH - Tractionally impaired
Re: Turbo cams....worth it? #204683
July 15, 2003 04:07 pm UTC
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Jeph Milley Offline OP
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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


2002 RSX Type S- Not stock....

1993 Eagle Talon-RIP
Re: Turbo cams....worth it? #204684
July 15, 2003 05:19 pm UTC
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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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Re: Turbo cams....worth it? #204685
July 17, 2003 11:24 am UTC
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Toronto
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Inder Minhas Offline
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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

Re: Turbo cams....worth it? #204686
July 17, 2003 06:26 pm UTC
July 17, 2003 06:26 pm UTC
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Chris Clark Offline
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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.


1990 TSi AWD - Parked since I bought it (Jan24/03)
Had it out one day, and busted the trans.
Re: Turbo cams....worth it? #204687
July 18, 2003 01:22 pm UTC
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Jeremy Chin Offline
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?

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?


300hp Talon to a 50hp Citroen. Lovely ain't it?
Back to another Mits.
A Mirage Cyborg as a future 4G63T candidate.

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Re: Turbo cams....worth it? #204688
July 18, 2003 08:10 pm UTC
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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.


1990 TSi AWD - Parked since I bought it (Jan24/03)
Had it out one day, and busted the trans.
Re: Turbo cams....worth it? #204689
July 18, 2003 09:24 pm UTC
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Paul Kruger Offline
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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

Re: Turbo cams....worth it? #204690
July 18, 2003 11:01 pm UTC
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Jeremy Chin Offline
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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?


300hp Talon to a 50hp Citroen. Lovely ain't it?
Back to another Mits.
A Mirage Cyborg as a future 4G63T candidate.

"I've had more Mitsu's than you can imagine"
Re: Turbo cams....worth it? #204691
July 29, 2003 03:48 am UTC
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Chandler Ole Offline
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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.


Talon ES-Turbo
Re: Turbo cams....worth it? [Re: Chandler Ole] #254807
January 29, 2008 11:14 pm UTC
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brendan warwick Offline
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So, do n/t cams help turbo cars?? maybe gives lower end torque?


1998 tsi awd, some mods
1998 honda civic new dd/winter
2002 GMC envoy

Re: Turbo cams....worth it? [Re: brendan warwick] #254808
January 29, 2008 11:21 pm UTC
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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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Re: Turbo cams....worth it? [Re: Tim Grechin] #255403
February 05, 2008 12:08 am UTC
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Mike Kuttschrutter Offline
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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?


Stock.
Re: Turbo cams....worth it? [Re: Mike Kuttschrutter] #255568
February 07, 2008 01:12 am UTC
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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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Re: Turbo cams....worth it? [Re: Tim Grechin] #255678
February 08, 2008 03:47 am UTC
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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


1998 tsi awd, some mods
1998 honda civic new dd/winter
2002 GMC envoy

Re: Turbo cams....worth it? [Re: brendan warwick] #255681
February 08, 2008 03:55 am UTC
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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?



Now, I'll have all kinds of time to talk about DSMs, because I won't be busy fixing mine!
Re: Turbo cams....worth it? [Re: Steve Kinnaird] #255687
February 08, 2008 04:25 am UTC
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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.


1998 tsi awd, some mods
1998 honda civic new dd/winter
2002 GMC envoy

Re: Turbo cams....worth it? [Re: brendan warwick] #255734
February 08, 2008 09:53 pm UTC
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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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Re: Turbo cams....worth it? [Re: Tim Grechin] #255836
February 10, 2008 03:43 am UTC
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Stephen Richardson Offline
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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.

Re: Turbo cams....worth it? [Re: Stephen Richardson] #255861
February 10, 2008 06:05 pm UTC
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Scotty Mac Offline
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Here's the specs on the Brian crower site. It lists stock turbo and non specs.

http://www.briancrower.com/makes/mitsubishi/4g63.shtml


'92 Laser AWD Turbo

It won't give up, It wants me dead
God damn this noise inside my head
Re: Turbo cams....worth it? [Re: Scotty Mac] #255998
February 12, 2008 05:20 pm UTC
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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.


Worst DSM'er Ever, Haven't had a DSM for 6 years.
Re: Turbo cams....worth it? [Re: Rafael Pimentel III] #256140
February 13, 2008 10:13 pm UTC
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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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Re: Turbo cams....worth it? [Re: Tim Grechin] #257904
March 02, 2008 04:54 pm UTC
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John Hartman Offline
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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.


91 Eagle Talon TSi AWD 5spd
91 Eagle 2000 GTX AWD 5spd
Re: Turbo cams....worth it? [Re: John Hartman] #327582
April 03, 2010 01:28 pm UTC
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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

Re: Turbo cams....worth it? [Re: Jonathan Beaton] #327584
April 03, 2010 01:47 pm UTC
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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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