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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 07-13-2008, 09:42 AM   #1
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1/4 mile results and question

Ok I went to the local dragstrip for the first time with the saab last night. The best time I got was a 15.085 at 93.00. The only mods I have is an open intake and a 2.5" custom exhaust on a 2000 saab 9-3 se. My first question is does that seem pretty spot on for a saab with just those mods? I know I can get in the 14's with it because it spun and wheel hopped off the line, which leads me to my next question. What can I do to help reduce the wheel hop?
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Old 07-13-2008, 09:51 AM   #2
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That is pretty close, stage 3 set-ups get around 14.7 at 104mph 1/4 mile times.

Poly bushings in the suspension will help wheel hop, which is what will take out the tranny...

John
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Old 07-13-2008, 09:54 AM   #3
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a subframe brace would help keep the wheels planted too.
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Old 07-13-2008, 09:56 AM   #4
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I am pretty positive I can get a 14.9 out of it. I think my last run would have been it but I left the line too easy and it bogged the car too much. When I dumped the clutch it jumped then went to idle then took off. After all that I still ran the same time and the same mph as I did my first run. Something like a 15.185 at 92 mph.
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Old 07-13-2008, 09:57 AM   #5
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Do you think lowering springs would help? I would think with the stiffer coils that it want allow as much weight transfer.
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Old 07-13-2008, 10:02 AM   #6
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Yup, it all helps, stiffer springs the rear and dampers, poly bushings up front, 6pt subframe brace, good tires, right air pressure, low in the front and high in the rear, pre-loading the car by slipping the clutch and getting the turbo moving.

Drag radials good for around .2-.5 seconds on the 60' time, then lowering the weight down and the list just keeps on going...

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Old 07-13-2008, 10:06 AM   #7
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Yea I know the physics of it all and how different things will effect the car. I guess I was looking for the biggest bang for the buck. I thought about brake boosting it to take the shock out of the drivetrain but my clutch probably isn't long for this world. There was 2 new honda accords there w/ the v6's in them, both with 30 day tags. I wish I could have lined up beside one of them. I never got to see them run so I have no idea what kind of times they were posting.
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Old 07-13-2008, 06:02 PM   #8
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well look on the brite side... nick must have spent $15k on his viggen and cant break 13 so your not to far off and only about $300 in.
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Old 07-14-2008, 06:37 AM   #9
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That is pretty close, stage 3 set-ups get around 14.7 at 104mph 1/4 mile times.

Poly bushings in the suspension will help wheel hop, which is what will take out the tranny...

John

umm I hit just under that time at 97.... and am a stg4? does this mena im doing it wrong?

and for op, thoughs are really good times for nearlly stock. what tires? what weather? and what elevation?
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Old 07-14-2008, 06:42 AM   #10
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I feel like 15.0 is pretty solid for an SE with the only power producing item being a catback.

Seeing your 60ft times will give me a better idea of where your improvement should come from.

I feel like your ET is a bit better than your trap speed which implies you did not get a crazy amount of wheelspin.

You are only a couple of tenths away from a stock Viggen, but your mph is 4-7 off.
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Old 07-14-2008, 08:59 AM   #11
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I will try to get you the 60ft times tonight. I didn't get A LOT of tire spin. It probably wheel hopped 6 ft or so and then hooked up. I was running about 28 psi in the front tires and 42 in the rear.
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Old 07-14-2008, 09:09 AM   #12
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Oh and it was probably a temp of 75-80 and an elevation of around 250-500 ft.
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Old 07-14-2008, 09:45 AM   #13
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I will try to get you the 60ft times tonight. I didn't get A LOT of tire spin. It probably wheel hopped 6 ft or so and then hooked up. I was running about 28 psi in the front tires and 42 in the rear.
People give wheelspin a bad rap.

In most cars, getting a bit of wheelspin off the line puts you in the meat off your powerband quicker.

So if our cars make peak tq at say 2500rpm, if we spin and then hook at 2500-3500rpms then we are getting into the sweet spot sooner.

Cars with less tq need more revs and wheelspin then others. Like on my old board Quad 4's(180hp and 160tq but needing lots of revs) would rev to about 4500-5k with wheelspin needed before a 3500-4k hookup and shifting before the limited at nearly 7000rpms.
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Old 07-14-2008, 02:03 PM   #14
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Ok here is the run down

60' = 2.264
330 = 6.318
1/8 = 9.709
MPH = 73.16
1/4 = 15.039
MPH = 92.16
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Old 07-14-2008, 02:05 PM   #15
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Ok here is the run down

60' = 2.264
330 = 6.318
1/8 = 9.709
MPH = 73.16
1/4 = 15.039
MPH = 92.16
Yep, as I thought.

Thats a pretty good 60ft time.

Thats 1-2 tenths better than all the other stage'd street tire'd 9-3's I see on here.

Every tenth off your 60ft takes 2 off your et.

So if you had done a 2.3 you would have had a 15.2 which would have been even more average.

So you are hooking up rather well for a Saab. Thats one of the reasons why your trap was less than spectacular. I am sure with more wheelspin you would have had something like a 15.3 at 95mph.
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Old 07-15-2008, 02:27 AM   #16
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I think that 15 secs is a brilliant time. My fastest time is 15.1 @ 157kph(98mph).
That is with my stock Vig and full weight(full tank and spare wheel). I am at 1800m above sea level though. Plenty wheelspin in first gear. The golf 5 gtis run [email protected] at best stock, and stock new Audi S3 runs [email protected], so i think a 15 sec odd quartermile for a SAAB is good. We sure do surprise alot of people who think they have hot hatches!
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Old 07-15-2008, 04:13 AM   #17
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Thanks for the comments! The announcer was pretty shocked at what it ran. Before I staged I built it up a little and spun the tires to clean them. When I lifted and the bypass valve released the guy running the lights looked suprised! haha
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Old 07-15-2008, 04:51 AM   #18
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Thanks for the comments! The announcer was pretty shocked at what it ran. Before I staged I built it up a little and spun the tires to clean them. When I lifted and the bypass valve released the guy running the lights looked suprised! haha
Thats good, we will show them! I once had a guy come and ask me if my car is a
3 litre V6 and four wheel drive. I love our sleeper cars!
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