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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 11-07-2012, 02:10 PM   #1
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t5 pistons in viggen

I am thinking about rebuilding the engine in my viggen. I use it as my dd and commute about 120 miles a day. I am wondering about long term reliability right now I have 210,000 miles on stock engine with Mike D tune. I plan on upgrading turbo to a 19t Iam unsure if the Wossners can be set up to get anywhere near the same mileage. I like the idea that with the forged pistons are lighter so it should rev moore freely which is a diadvantage with the t5 pistons. What do you all think. I want to build a kickass street engine that is still reasonably reliable. Thanks in advance.
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Old 11-07-2012, 03:02 PM   #2
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I am thinking about rebuilding the engine in my viggen. I use it as my dd and commute about 120 miles a day. I am wondering about long term reliability right now I have 210,000 miles on stock engine with Mike D tune. I plan on upgrading turbo to a 19t Iam unsure if the Wossners can be set up to get anywhere near the same mileage. I like the idea that with the forged pistons are lighter so it should rev moore freely which is a diadvantage with the t5 pistons. What do you all think. I want to build a kickass street engine that is still reasonably reliable. Thanks in advance.
If you are serious go get a b234. Throw the t5 cams into your t7 head and run the b234 block using a t5 head gasket. Get more reliability, durability, and your car wouldn't be down as long since you'd build the other block up first (minus the head).

Or buy a beater and quit racking up miles on the viggen.
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Old 11-07-2012, 03:11 PM   #3
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Buy a set of the new high compression JE pistons that Genuine Saab sells. Do .020 over (.5mm), shot peen the rods. Add new bearings. Continue driving. I'd think that you'd get a good amount of miles out of forged pistons.

GenuineSaab.com

With that kind of miles I'd probably check the head (valve seals) when doing that.

I mean... It's a Viggen after all... Plus this allows you to go bigger.
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Old 11-07-2012, 03:57 PM   #4
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i wouldnt mess with any other combo besides adding JE or wossner pistons. you will get the same reliability and longevity youd get with factory pistons. im sure the forged pistons have better rings than oem too. i prefer wossner over JE pistions
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Old 11-07-2012, 04:03 PM   #5
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I like the idea of the b 234 block with the t7 head and t5 cams will that make engine rev easier or seem about the same as stock b 235 . From what I've read if you use t7 cams with t 5.pistons it doesn't seem to be as willing to rev. I'm just thinking that with the wossners and the t5.the b235 might be as eager to rev as a 2.0 motor is my thinking a little off
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Old 11-07-2012, 04:11 PM   #6
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i wouldnt mess with any other combo besides adding JE or wossner pistons. you will get the same reliability and longevity youd get with factory pistons. im sure the forged pistons have better rings than oem too. i prefer wossner over JE pistions
Harvey got me started thinking about this when I stopped by to see him last week . Did you use wossners in your build I've read that thread a bunch of times but all that Iremember is that I'm jealous Isaw a thread somewhere that the rings for the je pistons aren't all that but Idont know this will be my first motor rebuild so I'm trying to ask all the right questions
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Old 11-07-2012, 04:18 PM   #7
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i have experience with those configurations and my opinion to you would be to stick with your block, installed wossner pistons (or JE), and a set of t5 cams. its a really nice setup. great powerband and quick revving. im actually building that exact setup with harvey this weekend for a fellow tsl member (szxviggen). you could use the b234 block but the headgasket coolant ports dont line up right with the head and it all just seems a little mis-matched to me. although its been done numerous times.

ill post up pics of the build after the weekend
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Old 11-07-2012, 04:20 PM   #8
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yea the quality between je and wossner definitely favors wossner. the rings look tougher too. and the skirts come teflon coated already, an extra charge on the JE
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Old 11-07-2012, 04:29 PM   #9
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I'm rebuilding my other motor soon.
Out of curiosity, How much were your Wossners, Pat ? (Ball park Figure)
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Old 11-07-2012, 04:30 PM   #10
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i think they were 560$ or so
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Old 11-07-2012, 04:37 PM   #11
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Thanks pat
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Old 11-07-2012, 04:40 PM   #12
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i think they were 560$ or so
That's pretty good

Is that with rings and stuff?
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Old 11-07-2012, 04:43 PM   #13
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Thanks pat
no problem. idk where your from but stop by harvey's shop this weekend if your in the area. so you can see all the goodies in person.

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That's pretty good

Is that with rings and stuff?
yup. rings, pistons, wrist pins, and a sticker

talk to JZW, he can get you a set if need be
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Old 11-07-2012, 04:47 PM   #14
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I'm in york,pa about 45 minutes away, sounds like a plan
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Old 11-07-2012, 05:28 PM   #15
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yeeaa...looks like another great thread!!!
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Old 11-07-2012, 06:38 PM   #16
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I went the wossner piston route after a month of going back between the 2 companys. The pistons are great and well worth the money when I rebuilt my b234 in my 9k. I called there US dist. and talked to them for probably about a hour, and after how helpful they were i was sold on them.
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Old 11-07-2012, 06:41 PM   #17
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I guess I don't have the experience with the JE pistons yet, however those are the ones we bought for the B205 build I'm doing right now. (90.5mm, Standard, Non Coated)

The machine shop I took the engine I'm working on to said the JE pistons are great pistons.
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Old 11-07-2012, 07:33 PM   #18
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they are great pistons. ive used both wossners and JE in my viggen. build quality of the wossners is just better IMO
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Old 11-07-2012, 10:25 PM   #19
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I've built two JE Saab engines and 0 Wossners, mostly because I like dealing with Nick at Genuine Saab; but whichever is probably fine. Close to stock geometry is what you want for the good longevity. That said, I haven't torn down a high miles B2xx with forged pistons yet.. I think the wallowing-out issues that you read about with forged pistons is from bad geometry a lot of times.

Anyway, there's probably a lot more impact getting a good balance than there is between JE/Wossner. You'll be surprised how much metal they take off to balance the stock rotating assembly, and there's a huge difference in feel and smoothness on a well balanced engine. Huge.
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Old 11-08-2012, 03:53 AM   #20
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Having used both JE and Wossner, I would recommend Wossner as well.
From what I was told, JE makes pistons for our Saabs as a special order, while Wossner makes them as part of their regular inventory
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