Cylinder Head Modification [Archive] - SaabCentral Forums

: Cylinder Head Modification

19th July 2002, 11:25 PM
According to Swedish dynamics ( One of the most popular horsepower upgrades for a N/A saab like mine (1997 900S 2.3 liter) is cylinder head modifications. I just finished reading the last topic about turbocharging and that the 2.3 liter is built solid enough for a lot more power to run through it. So would i have no problem at all running modified cylinder heads in my Saab???

Janne Selinummi
20th July 2002, 08:34 AM
It's all about the mods you do. If you stay with mild street camshafts and stock valves, driveability needen't suffer, and you can still get noticeable gains. Now, if you get a racing mod with big valves and aggressive cam profiles, you'll get massive power in high rev range, but low-down torque will be non-existent and the car will be difficult to drive on the street.
Just a good old port/polish job with optimized cam timing would be the way to go if I was to do something to a N/A Saab.

20th July 2002, 10:02 PM
Thanks for the reply. I do plan on staying with the stock camshafts and valves. About how much horsepower gain do u think i might get?

21st July 2002, 01:43 AM
its hard to say really...
But not huge....

I don't want to deter you from moddding your car but a simple port/polish and no other work will probably be a bit of a waste of money to do by itself....

Also with your Auto, you willl not experience much different due to preset shift patterns.

Janne Selinummi
22nd July 2002, 03:52 PM
With the Swedish Dynamics regrind camshafts to go along with their head-conversion you would get noticeable power gains, but then that head job is expensive.
Have you thought about turbocharging your engine? All the good Saab tuning specialists have experience in turning N/A Saabs into Turbos, and while there is quite a bit of work and expenses, I think that route would provide you with more "bang for buck". Or get a full turbo engine out of a NG900 Turbo or 9-3 with all the injection/ignition components to make the job easier.

22nd July 2002, 05:22 PM
You might get 10-15 Bhp higher revs, and better throtthle, with new street cams.

but , it will not make so noticeable change in everyday driving, due to your auto tranny.

If you like to get more Bhp´s, you have to upgrade your exhaust and fuel pattern.
With chipped ECU, your total benefit would only be 25-35 Bhp´s.. Which is shame, because it´s may not be worth of doing.

You´ll definetely get better result, with changing the engine into turbo model or building it from N/A engine.
2.3 Turbo have originally 225 BHP´s and it is easilly upgradable to 260 BHP´s, which has a great driveability in everyday use + enough power to "kick ***" for Beemers and so on.

Turbo is the cheapest way to get lot´s of Bhp´s.

22nd July 2002, 10:51 PM
Well i think putting a turbo on my Saab would be WAY over my budget and i have a feeling doing cylinder head mods might be too. So i think i'm gonna go with a modest upgrade of a free flow exhaust from and a adjustable fuel pressure regulator. As much as i'd love a turbo i'm 17 years old and coming up with that much money would take a good amount of time.

22nd July 2002, 11:00 PM
i would say the best way to get more power is to get a 5-speed. this way you could push the car into higher revs without it shifting on you. This would be very expensive to convert tho, and would be way out of your budget. Buying another saab with a 5-speed would be ideal, you could probably get one for the same or less of what you would get from selling ur current car.

Just an idea, i know ive thought of ditching mine and getting a turbo.

For the slow:
I own a '93 Saab 900S
>169,000 miles seen

<font size=-1>[ This Message was edited by: 93Saab900s on Jul 23, 2002 4:01am ]</font>

23rd July 2002, 12:16 AM
Yea i've thought of ditching mine for a turbo but the loss of selling it and then paying taxes again i just don't wanna do. Also i now have no more car payments which i'm happy about. I'll be keeping my car through 4 years of college. My car can be slow sometimes and seem adequately fast others. I just tend to have a thing for speed :smile:

23rd July 2002, 01:25 AM
I meant to tell you thank you everyone for your input! I wish i could afford more upgrades but i also just put about $1400 into new wheels are tires but they do look great! There is a pic of them on my car at my website Feel free to sign the guest book too and let me know what u think of the site!!! I just started it though

23rd July 2002, 02:37 AM
love the wheels bro......

maybe you should just be happy with the beautiful car you got...

good things come to those who wait.....

(i cant beleive i am saying this, its deffinitely not in my nature...)

23rd July 2002, 03:09 AM
Dude you need to slam that to the ground.

23rd July 2002, 11:47 AM
Thanks for the compliments man! Yea i've thought about slamming it but i use the car all year round (my stock rims are going back on for the winter) and i live in Buffalo, New York which is where we got 7 feet of snow last year so i'm not sure how much snow i'd be able to clear. If you were to lower a Saab though what else do you have to add?? (different spring or shocks)

23rd July 2002, 03:10 PM
Just the springs and shocks. Maybe some spacers if you want to adjust the smoothness of your ride.