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Discussion Starter · #1 ·
Looking into buying a local Viggen with a shot engine. I was considering putting a T5 engine in it rather than mess around w/ getting another T7 viggen engine. Has anyone done this? Should this be a straight swap? I was planning on using the Viggen IC, tranny, and then just beefing up the T5 engine latter, since it is apprently more tunable. Any feedback would be appreciated. Thanks
 

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I don't know if it will bolt up or not, but you can get a T7 engine at just about the same price or even cheaper then a t5 depending on engine.
 

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Discussion Starter · #3 ·
The only reason why i suggested the T5 was because of the supposed tunability of the engine as compared to the T7. Also where would I be able to find a low mileage used engine? Is there company that provides them from scraped saabs, or do I just have to root around different junkyards?
 

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You can also try searching online for junkyards.
They can usually ship the engine for about $200 or so
 

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Discussion Starter · #6 ·
can anyone comment on the effects of this swap using the viggen tranny? Also does anyone have a clue as to what the swap itself might cost?
 

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well do you have access to a cherry picker? Are you a DIY kinda guy? or are you planning to have a shop do this?
 

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Discussion Starter · #9 ·
Definently plan on having a shop do it. Goldwing saab seems like they know what they're doing, so I might give them a try. My uncles a mechanic, so I would like to have him do the swap, but perhaps it would be better to have a saab specialist do it instead.
 

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Call me dumb, :oops: But whats the difference between a T5 & a T7 could someone briefly explain this to me so I know what you guys are talkin about lol.
 

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Looking at your Idea :wink: .. that you find the T5 engine to be great on a Viggen ..

Let me give you a better Idea .. 8)

2.3 Liter T7 B235E or B235R pistons cannot take more than 300hp, then you will have to change the pistons to forged pistons..

:idea: BUT :!:

:arrow: 2.0 Liter T7 B205 can handle upto 400hp on stock pistons .. which i'm working on currently .. you are talking 350 HP & around 480 Nm..

the good thing about the 2.0 Liter it takes you long time to reach a point of changing the pistons :)

a friend of mine had a cracked piston on his 9-5 Aero, he didn't know about it .. and suddenly the whole thing was screwed up :( he had to change the whole thing including the Cylinder head since the two parts of the pistons splitted .. the first damaged the cylinder hear .. and the othe one went with the crankshaft and made a big hole into the block :cry:

the easyiest solution was to install a T7 2.0 liter .. with the TD-04 turbo and a software from Nordic which made it something like 250hp and that is with stock exhaust :)

Think about it ;)
 

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T5 and T7 denote the different engine management systems used on Saabs from 1994 to 2004.

T5 is on 94-99 NG900
T7 is on the 99 Viggen and the 00-04 9-3s and 9-5s

T5 computes the air / fuel mixtures differently than T7 and is more tuneable. (This is a really simplified explanation; search the boards for additional info...)

The weak points in the Viggen engine are the pistons, just as saab666 said. They're very lightweight pistons that tend to do nasty things at the most inopportune moments.. Rather than swap out the entire engine it might be more feasible to rebore the cylinders, put in tougher pistons and rebuilt rather than replace. If there's a hole in the block, you're screwed....

Consensus opinion is that it's much easier to put a T7 engine in a T5 car than the reverse. I'm putting a B205R into a 97 SE, and keeping the T5 management...
 

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WOW, thanks for the info but DAMNIT i have a T7 :x supposidly. MY saab is a 2000. :idea: So if I was going to buy a saab just to make race worthy i should definitly go with an older T5.
 

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Ok just hold on here. There are alot of T7 cars in Europe that are running 400HP and having no issues. The T7 and the T5 are different beasts. The T5 is more cheaply tuned by things like MBC's and BOV's things like that. IT doesn mean that the T7 is not an equal to the T5 in every other way if not superior to it in it's ability to control knock and detonation. If you spend the money right and choose the right path your T7 will be just as fast and probably faster and safer than a T5 that has been cheaply tuned with MBC's and bolt ons in my opinion. I am biased since I own a T7 car myself but like I said look to the European cars and cars like Ricot's on here and the T7 story will be told correctly.
 

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rcmdesign said:
Try Volvo/Saab Dismantlers in CA. 1800-700-8658 Ask for Dave or Kenney.
YEAH SAC TOWN!!!
haha they are cool...but started raising their prices...... they have almost evrything!
 
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