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Old 09-24-2006, 11:33 AM   #1
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Why is my viggen not performing

I just recently took it to the drags. This was my first time but when the night was over I was really upset at my results. I got a 15 flat for a 1/4 mile. My girlfriend and I have the same exact viggen except hers is stock and we both got the same times. I had a little better reaction time aswell.



I thought maybe it was my exhaust holding me back but now that I took a look under Im pretty sure I have the whole Remus cat back which is supposed to be the best. I also looked at my boost gauge and I was jumping to 20 psi and then right away dropping to 16.I didnt race adapt it but that cant slow the car down too much. I just recently upgraded to NGK iridium spark plugs to help with boost too. I have all of these mods and Im absolutely clueless why both viggens are performing the same times.



Maptun Stg 3

3" Downpipe with GenSaab race cat

Remus piping and Muffler

GenSaab upgraded intake

Group9 upgraded Intercooler

HX Hyperboost bypass valve

Spec Stg 3 clutch



Can anyone help shed some light on this? Id like to know whats wrong





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Old 09-24-2006, 11:43 AM   #2
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What do the 60' times look like between you and your wife?
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Old 09-24-2006, 11:46 AM   #3
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My first gear was sloppy because I heard the track was covered with oil so I started semi slow.

Hers was 2.523 and mine was 2.621
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Old 09-24-2006, 11:48 AM   #4
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Hunter, try unplugging your ECU and re-adapting it, what do you normally boost to and hold with stage 3? Possibly a boost leak somewhere...
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Old 09-24-2006, 11:51 AM   #5
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Unplug my ecu or unplug my battery?

When I was coming back from having my clutch done about 3 months ago I remember holding a solid 20PSI on the highway. I havent adjusted any hoses since. Where would I go to have a boost leak check performed?
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Old 09-24-2006, 11:52 AM   #6
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Any autozone or shit can do a smoke test, you can either pull the fuse for you ECU or unplug your battery for 10 or so minutes, then take it out on the highway and do a bunch of 3rd, 4th and 5th gear runs.
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Old 09-24-2006, 11:53 AM   #7
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Which fuse is the ECU? I dont think the panel has it
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Old 09-24-2006, 12:00 PM   #8
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uh iridium plugs?

whats thw model number on those?



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Old 09-24-2006, 12:02 PM   #9
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Yeah jon chartier told me theyre better then copper
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Old 09-24-2006, 12:07 PM   #10
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You need to run NGK 7 series, BCP RES 7 something like that...
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Old 09-24-2006, 12:12 PM   #11
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yea.... the DI's are very finicky..... I have always been told to ONLY use the OEM saab NGK's, 7 something.... is the model

I heard Paul from Automotion state anytime new plugs are added you must adapt the ECU. Since you went with something non-OEM it's probably more critical
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Old 09-24-2006, 12:18 PM   #12
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Mine are 6 I believe
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Old 09-24-2006, 12:21 PM   #13
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Yea, try the 7 series, they are a colder plug and while it may seem like something so little it can actually make a huge difference.
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Old 09-24-2006, 12:22 PM   #14
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http://www.genuinesaab.com/catalog/p...products_id=92
Check that out, you want the BCPR7ES-11's.
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Old 09-24-2006, 12:47 PM   #15
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Besides the mechanical issues you may have your 60fts are killing you. Yours wifes 15.0 is pretty much what they run DEAD stock.

Trexturk on here ran a 14.2 in his stage 4 LPT 2.0(viggen turbo, GS IC, full exhuast) and put down 2.2x 60fts. For every tenth off your 60ft is two off your 1/4. So right there you would be in the low 14's if you can get the same 60 fts. Did you air down your tires? 21-23 psi usually works well.
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Old 09-24-2006, 01:17 PM   #16
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Ive never heard of airing down your tires. Dropping them to 21-23 psi makes better times? I would think a higher psi would be better
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Old 09-24-2006, 01:18 PM   #17
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BCPR7ES-11 is only copper correct? Or do they make that model with different metals?

Edit: Copper/Plat BCPR7ES-11 Iridium BCPR7EIX-11 (5691)

Last edited by HOTiSO; 09-24-2006 at 01:21 PM.
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Old 09-24-2006, 01:23 PM   #18
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the lower psi deflates the tire giving it more surface area against the asphalt, at the expense of steering feel and overall handling.

Atleast with the T-5 system BCPR7ES-11 are the only acceptable sparkplugs unless the car is tuned and designed for platnium plugs...
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Old 09-24-2006, 01:24 PM   #19
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Ive never heard of airing down your tires. Dropping them to 21-23 psi makes better times? I would think a higher psi would be better
Higher tire pressure (to a certain extent) is better for handling, whereas lower pressure (to a certain extent) is generally better for straight-line traction.

Just don't be a tool and lower the pressure so much that the front bumper scrapes the ground everytime you brake... the driver of an Integra I ran against last time I was at the strip did that. It didn't help him much
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Old 09-24-2006, 01:56 PM   #20
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Sorry to interupt
I'm running Stage4 in my 9-3, using spark plugs 1289 NGK BCPR7ES

ARe these the right plugs for my car?
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