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Discussion Starter · #1 · (Edited)
Over the festive season I've read a bit about some very highly tuned T7 cars (9-5's and 9-3's) and several have had T5 camshafts fitted.

Bearing in mind this is a relatively easy job to do, and there are plenty of T5 camshafts about:
  1. Anyne else heard of this?
  2. Whats the benefit?
  3. Is it a specific T5 cam thats best to use?
  4. Is it just the camshaft, or is it springs and valves etc that need changing?
  1. http://www.maptun.com/cars.php?car=Saab%209-5&page=1&id=105
 

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Discussion Starter · #3 ·
boxman said:
i will need to check this but i think its only the inlet cam thats differant on the T5
Please indulge a dumb ***** what does that mean?

We have two cams yes.................erm................ ;oops:

(I know I'm only good at waxing the car ;oops: )
 

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i did some looking into differances between T7 engines and T5 engines for fast ed in the late summer and i can remember that the inlet cam is differant on a T7 to a T5 but the exhaust cams are the same on both engines, but i may have it the wrong way around
 

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Chris 9-5 said:
Over the festive season I've read a bit about some very highly tuned T7 cars (9-5's and 9-3's) and several have had T5 camshafts fitted.

Bearing in mind this is a relatively easy job to do, and there are plenty of T5 camshafts about:
  1. Anyne else heard of this?
  2. Whats the benefit?
  3. Is it a specific T5 cam thats best to use?
  4. Is it just the camshaft, or is it springs and valves etc that need changing?
  1. http://www.maptun.com/cars.php?car=Saab%209-5&page=1&id=105
The guestion also arrowses what is meant by T5-cams...

This list should help

Specs of stock 16v cams: SAAB part Number Type Lift mm IVO (BTDC) IVC (ABDC) EVO (BBDC) EVC (ATCD) Duration
7509201 Intake 8.65/6.65 10.0 56.0 - - 246.0
7509219 Exhaust 8.65 - - 56.0 16.0 252.0
7560808 Intake 8.65 16.0 56.0 - - 252.0
7560964 Exhaust 8.65 - - 61.0 13.0 254.0
7561467 Intake 8.65 16.0 44.0 - - 240.0
9116690 Intake 8.65 13.0 53.0 - - 246.0
9116708 Exhaust 8.65 - - 50.0 16.0 246.0
9145632 Intake 8.65 14.0 46.0 - - 240.0
9145640 Exhaust 8.65 - - 44.0 16.0 240.0
9145657 Intake 8.65 13.0 53.0 - - 246.0
9145665 Exhaust 8.65 - - 48.0 18.0 246.0
7518913 Intake - - - - - -
9148305 Intake - - - - - -
9148313 Exhaust - - - - - -
9170887 Intake 8.31 12.0 39.0 - - 231.0
9188855 Exhaust 8.07 - - 34.0 14.0 228.0
9170895 Exhaust 8.31 - - 37.0 14.0 231.0

Which cams are found on which Engine: Engine model Year Type SAAB part Number other part number
B202 1984-85 Intake 7509201 -
B202 1984-85 Exhaust 7509219 -
B202 1986-93 Intake 7560808 7509227
B202,B212 1986-93 Exhaust 7560964 7509235
B202i, B212 1986-93 Intake 7561467 -
B202 cat 1986 Intake 7518913 -
B234 1990-92 Intake 9116690 -
B234 1990-92 Exhaust 9116708 -
B234 1993 Intake 9148305 -
B234 1993 Exhaust 9148313 -
B234I 1994-2000 Intake 9145657 -
B234I 1994-2000 Exhaust 9145665 -
B206I, B204I, B204L 1994-98 Intake 9145632 -
B206I, B204I, B204L 1994-98 Exhaust 9145640 -
B204E, B204L,B204I, B204R 1998-2000 Intake 9145632 -
B204E, B204L, B204I, B204R 1998-2000 Exhaust 9145640 -
B205L, B205R, B205E, B235R 1999-2001 Intake 9170887 -
B205L, B205R, B205E 1999-2001 Exhaust 9188855 -
B235R 1999-2001 Exhaust 9170895 -

quote, adrian W from the beginnin of this year

The trouble with changing one cam is that the valve overlap will be altered. But if you have a Trionic 5 engine, the swap to B234i intake cam only might still work.

Compared to if you swap both, with intake cam only you have 2 degrees less valve overlap, and 6 degrees less exhaust duration than you would have if you swapped both.

Intake cam alone would still give you 6 degrees extra intake duration, and the intake valves would close 7 degrees later. (Good for high RPM.)

No one's tested it though, so you do so at your own risk!

Timing:

B204all 94- 14 46; 44 16
B234t 94- 14 46; 44 16
B234i 94- 13 53; 48 18
 

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Discussion Starter · #6 ·
I have tried putting all that into my TomTom and I'm still lost :eek: , now I reckon that means I should leave the cams alone then :cheesy:


Thanks guys for trying to explain ;)
 

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Chris 9-5 said:
I have tried putting all that into my TomTom and I'm still lost :eek: , now I reckon that means I should leave the cams alone then :cheesy:


Thanks guys for trying to explain ;)
keep long story simple, by adding cams from a T5i to a T7 car one will achieve more lift and duration, ie. filling will be better = suitable for more hp (mid and high rpm range).
On the other hand if you have the stock "mandarin" intact as a turbo, cams would not be my first choice to upgrade...
the std turbo is more like a low end/mid range and the benefit from cams is more or less guestionable.

and to your initial guestion about other parts, I would recommend that you go through the whole head at the same time and replace all the worn std items with new ones.
 

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Discussion Starter · #8 ·
Thanks Vigge ;)
 

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I have had both the B234/B202T and B234i cams in my viggen with stage 3+ intercooler and 18t6cm. The NA cams felt stronger on the street.. Problem is after giving it some miles to adapt on the dyno we had lost 15-20 hp/tq pretty evenly across the range. The t5 turbo cams will give a bit more top end but at the expense of low end power. Now I also know that the software has a major factor in this and this is without optimized T7 software. On your auto I would stick with factory. Maybe swap to the B235R exhaust since you have 2.0 Can never hurt to try though.
 

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Discussion Starter · #10 ·
Thanks Nick, I'm not sure what to do really it seemed a straight forward idea and a reasonably priced mod, I dont need top end power, certainly dont want to lose the bottom end power in the lower rev range.

Shame we cant dyno the thing before and after really :confused:

Looks like Dave's right, forged pistons and bigger turbo next :cool:
 

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Dyno is easy... just swap a couple wires at the ABS computer ;)

You just want to make those poor 4speed gearbox parts land over here don't you... You need the new V6 6speed auto box 9-3 ;)

You sure about pistons on that 2.0, is there really as much need since the compression is lower? now different turbo, yes.
 

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Discussion Starter · #12 ·
Tested to destruction :cheesy:

We couldnt find an easy wiring fix for the dyno problem, presumably a 4 wheel dyno would work :confused:

Bigger turbos confuse me too, several seem to step back to Garret with the 28BB others go with the TD04 with the 18 housing.

What do you think Nick?
 

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With the autobox, tuning for power higher in the rpm range might enable you to get more power out of the thing. The low end torque is what really heats up the trans and if you sacrifice some low end but really peak out like crazy in the upper rpms, you might save the trans a bit longer than a conventional setup where there is a big lump of torque at 2500rpm. Just a thought...
 

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Discussion Starter · #14 ·
D'oh...........that makes sense too :confused:

Thanks ;)
 

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Discussion Starter · #16 ·
Tempting innit :cheesy:
 

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Discussion Starter · #18 ·
When it breaks Andy I'm sure that will be the way to go :p
 

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Discussion Starter · #20 ·
There are quite a few running GT28BB (is that the same?) :confused:
 
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