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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 07-08-2008, 04:16 PM   #1
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Exclamation e85 or 92 Octane

I have a 2001 Viggen, with the following mods; 3in dp, cobra intake pipe, new td04, intake, 2.5in exhaust with straight intermediate pipe, ETS intercooler. I'm thinking whether i should get the 3.5 bar fuel pressure regulator and go stage 4 ECU or some injectors and go e85 stage?? What would you guys suggest
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Old 07-08-2008, 04:22 PM   #2
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how available is e85 where you live?
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Old 07-08-2008, 04:29 PM   #3
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most gas stations have it theres 4 gas city's within 1 mile radius of my house and each have e85 and race fuel
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Old 07-08-2008, 04:32 PM   #4
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but would i get better power from e85 or just sticking to gas
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Old 07-08-2008, 04:33 PM   #5
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I would call Nick and talk it over to see what he suggests.
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Old 07-08-2008, 06:52 PM   #6
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Originally Posted by Viggen Crazed View Post
but would i get better power from e85 or just sticking to gas
e85 will make more power. read this thread https://www.saablink.net/forum/showthread.php?t=30154
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Old 07-08-2008, 07:44 PM   #7
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E-85 man is the way to go
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Old 07-08-2008, 08:38 PM   #8
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For sure call Nick T. I'm loving my set up and other than the turbo my 01 vig is set up close to yours. You can run a flex program that will allow you to run gas also.
Anyway, for what it's worth I really saw a nice difference with the flex program, running with E85.
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Old 07-09-2008, 04:48 AM   #9
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E85 can make good power but it takes allot different fueling to get the same power out of the car as it would on a normal gas tune.


I agree with HawaiianSAAB and that if you are going to go with an e85 tune make sure that you get one that is a flex tune.
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Old 07-09-2008, 06:12 AM   #10
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E85.
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Old 07-09-2008, 07:45 AM   #11
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My understanding of the E85 flex fuel tunes is that on gas, with your current hardware, you would have a stage 3+ and when you fill up with E85 you would be around stage 4 power. The Nordic E85 Flex Fuel tunes at that hardware level might require both injectors and 3.5 bar FPR becuase of this. Bottom line, ask Nick.
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Old 07-09-2008, 09:19 AM   #12
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I talked with Nick about this in regards to my viggen (18T) , and it is not plug and play at all with staged ecu's. There is a hell of a lot involved in regards to our cars. I asked him about the injectors packs they sell, and if you have a stock car then it should work, if not then do not do it as the car would have to re-mapped and there isn't any off the shelf tunes for this yet except maybe maptun.
Hawaiian-what stage do you have?

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Old 07-09-2008, 10:40 AM   #13
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Or you just custom tune it yourself like I did for my current e85/93 pump tune.

Once I get 750cc injectors I will most likely switch over to full e85 as my car is making a good bit more power with 35% e85. That puts me at about 100 octane.

There is quite a few maps to be delt with, but if you are tuning yourself, all the information is in the manual

John
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Old 07-09-2008, 01:12 PM   #14
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Or you just custom tune it yourself like I did for my current e85/93 pump tune.

Once I get 750cc injectors I will most likely switch over to full e85 as my car is making a good bit more power with 35% e85. That puts me at about 100 octane.

There is quite a few maps to be delt with, but if you are tuning yourself, all the information is in the manual

John
Yes, but as he/we have a T7's and the program is not yet available, so us T7 guys are in the dark so to speak. You T5 guys that have been doing this now for a few months are very lucky. I would think that the learning curve will be very steep in regards to re-mapping a T7, as I'm sure it was/ is with the T5?
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Old 07-09-2008, 10:47 PM   #15
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I'm running what Nick calls stg 4+ flex. Here is the list of eng. hardware.
GS Turbo back
forge fmic
GS stainless intake pipe
GS modded air box w/filter
18T 6cm2 TD04
3.0 bar FPR
Siemens 630cc injectors(had 3.5bar w/green giants until flex prog)
T5 cams
JE forged pistons
SPEC 2 clutch
forge bypass
aquamist 1s system(not hooked up since flex)
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Old 07-10-2008, 04:25 AM   #16
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Originally Posted by HawaiianSAAB View Post
I'm running what Nick calls stg 4+ flex. Here is the list of eng. hardware.
GS Turbo back
forge fmic
GS stainless intake pipe
GS modded air box w/filter
18T 6cm2 TD04
3.0 bar FPR
Siemens 630cc injectors(had 3.5bar w/green giants until flex prog)
T5 cams
JE forged pistons
SPEC 2 clutch
forge bypass
aquamist 1s system(not hooked up since flex)
Do you have a viggen? I'm thinking yes as you state you have T5 cams. If so your car is just like mine except the cams/pistons. Can you tell me what they did to the ecu and how they did it? Was it off the shelf, custom tuned in house??
Thanks
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Old 07-10-2008, 08:33 AM   #17
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Yes, but as he/we have a T7's and the program is not yet available, so us T7 guys are in the dark so to speak. You T5 guys that have been doing this now for a few months are very lucky. I would think that the learning curve will be very steep in regards to re-mapping a T7, as I'm sure it was/ is with the T5?

Its just about done, it should be available soon. There is quite a few more maps that is for sure.

I have been talking about these things in t5 for so long it all seemed familiar to me and I seem to have a natural knack for tuning. I knew all the tuning priciples and theory and just had to put them to use. It just takes time and the easiest thing to do is look at stock files and tuned files and see what people are doing to the boost, fuel, knock and timing maps...

John
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Old 07-15-2008, 08:15 PM   #18
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Do you have a viggen? I'm thinking yes as you state you have T5 cams. If so your car is just like mine except the cams/pistons. Can you tell me what they did to the ecu and how they did it? Was it off the shelf, custom tuned in house??
Thanks

Yes, my E85 car is an '01 viggen. The ecu is just a T7 that Taliaferros tuned for me, plug and play. Nick's custom flex from the Nordic boys. I'm certain he can provide the same SW for your application. I can't say enough good about it, truly a beast. I'm fairly sure it's about to the point of "better not miss shift" to keep my gear box happy.
Oh, and the SW worked very well with or without the T5 cams, I liked them both for different reasons.
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Old 07-16-2008, 05:11 AM   #19
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Once I get 750cc injectors I will most likely switch over to full e85 as my car is making a good bit more power with 35% e85. That puts me at about 100 octane.
John
Depends on what "real" power level you aim at, but currenty I personally for instance dont have too much DC to spare with normal fuel and 750CC's (DC ~95%). Increasing the fuel flow by 40% from the current level would require bigger injectors and pretty much the whole fuel side (rail, lines, pump etc).
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Old 07-16-2008, 06:20 PM   #20
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This makes me wonder if its true that less fuel is needed to make the same power at elevation. I am sure my dc is high, but really don't know how high it is right now.

The other draw back is that if you ever want to travel somewhere, the issue of finding e85 can be a real one.

I might just stick with 35% e85 to keep my octane up, egts a little lower and give myself a little more knock protection. The car is going faster on the clock and I want to get back on the dyno and see what it says about power and torque...

John
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