Should I put my T5 cams in? - The Saab Link Forums

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Old 09-11-2009, 10:07 AM   #1
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Should I put my T5 cams in?

Well I have been contemplating this for a while now. I recently acquired a set of T5 cams from a 98 900s Turbo and have been thinking about putting them in my Viggen. I have read quite a bit about it and have seen some mixed reviews. Some people said they noticed a huge difference, others said they didn't notice anything.

I was curious, is the difference worth the effort? How noticeable is it? How much power gain will I get?
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Old 09-11-2009, 10:33 AM   #2
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depends...

Depends what you are aiming for.
T5 cams on T7 engine means a better breathing. In other words, the valve pistons will stay opened longer/wider -> more power at higher revs.
You should not expect faster spool-up or such. Just more power in the top revs.
Also, the ECU can be re-maped to this mod, for best results, although you can swap the stock T7 cams and the engine will run okay (after a couple of minutes of idle while the ECU learns the new set-up).
If you are going for bigger output, you might consider this mod. Otherwise, is just work.
My 0.02$
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Old 09-11-2009, 10:35 AM   #3
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Well I have a T7Suite Stg 3 tune and I really want more middle - top end power more than anything.
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Old 09-11-2009, 10:44 AM   #4
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then i say go for it. i have T5 cams in my viggen and it really liven'd up the mid to high end power band. the torque feels like a much smoother curve now. it doesnt hit all at once like it used to
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Old 09-11-2009, 12:05 PM   #5
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I've put them with Craig in my Viggen and I didn't really feel much difference.
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Old 09-11-2009, 12:40 PM   #6
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If you have them, put them in. Vigge was stating in a thread that they really come alive with bigger turbo's.
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Old 09-11-2009, 12:52 PM   #7
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So why did Saab change these cams to a lesser lift in the first place?
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Old 09-11-2009, 02:36 PM   #8
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Put them in! You already have them and the work is pretty easy to do. Everybody has a different "butt-dyno" and you shouldn't just go by what someone feels. It's been proven that you gain 10-12 hp with these across the rev range (mostly mid- to upper-).
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Old 09-11-2009, 02:44 PM   #9
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zach, if youwant to come down, we can do 'em this weekend.
only takes an hour or so.....

I would imagine you'd need a re-flash to REALLY take advantage of it....
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Old 09-11-2009, 03:48 PM   #10
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t7 will adapt to the cams. i feel a minor change, if you got them do it. its a easy install too so why not
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Old 09-11-2009, 05:27 PM   #11
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Quote:
Originally Posted by g96nt View Post
zach, if youwant to come down, we can do 'em this weekend.
only takes an hour or so.....

I would imagine you'd need a re-flash to REALLY take advantage of it....
I have no problem changing them out, I just was curious if it was worth it haha I'll probably do it sometime next week.
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Old 09-12-2009, 05:41 PM   #12
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Well, I just put the T5 cams in at Teddy's house about an hour ago. I also swapped out my extremely restrictive 99 Viggen cobra pipe with a little bit bigger 02 Viggen cobra pipe.

Initial impressions, AMAZING difference in mid - top end power. I don't know why some have no difference, but it woke my car up. It feels like a totally different car in high rpms. 3800k rpm + is definitely the sweet spot now. Usually it would pull hard right from the get go and then lose steam after about 4500 rpms, now it's complete opposite... It pulls very hard and keeps pulling right til redline.

Granted, I changed 2 things at once so I can't say how much butt dyno each part added....

But, I'm so happy with these cams!
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Old 09-12-2009, 06:02 PM   #13
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So why did Saab change these cams to a lesser lift in the first place?
Mileage?
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Old 09-12-2009, 08:36 PM   #14
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I have a better idea than installing them. Give them to me!
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Old 09-13-2009, 05:53 AM   #15
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So why did Saab change these cams to a lesser lift in the first place?
Emissions and they wanted a torque monster so to speak?
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Old 09-13-2009, 08:25 AM   #16
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Quote:
Originally Posted by watkins View Post
I have a better idea than installing them. Give them to me!
Too late
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Old 09-13-2009, 08:55 AM   #17
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They made a great difference on my 170 hp 99 9-5 wagon, from about 3400 rpm up you do notice it... which is perfect because that is where the lil' GT17 runs out of steam.

T boy, SAAB changed the cams as part of the whole T7 Ecopower / Low friction philosophy of better fuel economy through less power.
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Old 09-13-2009, 09:06 PM   #18
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I had all the necessary "stage 4" hardware on a stock ECU for a while. Then I put in T5 cams and I will confidently say that the cams made more of a difference (butt dyno) than full exhaust, ETS IC, and intake, on a TD04 combined. It really felt to rip through those higher RPMS and I heard a difference in tone too. Maybe a bit less of torque spike, but definitely worth it.
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Old 09-14-2009, 04:53 AM   #19
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I think you made the right choice. I noticed a difference when I rode in Nick's 9-5.
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