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Old 10-22-2012, 02:35 AM   #1
TwiceDubbin
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Impreza WRX 2011 Stock WRX 13.13 @ 103.73 1/4 Mile

Hey everyone - been around for a little reading mostly. I figured I'd make a post up here for anyone who is interested in what a stock, untuned 2011 WRX can run. I made this pass this past Saturday at a test-n-tune at Pittsburgh Raceway Park. The stock cat-back was off of the car and there were some interior pieces/spare removed - I figure they probably about even me out with the average male weight wise I need driver weight redux!

This car made 210awhp/218awtq on a local Mustang Dyno. It is supposed to be one of the lowest reading Mustang Dynos on the east coast from what I've heard comparatively, but again this is all for perspective relative to the ET/trap. I can upload the chart if anyone is interested in seeing it - I also will scan and upload the time slips.

YouTube video link:

Here are the notes from the YouTube video I posted:

"Stock, untuned 2011 Subaru WRX 1/4 mile run. Cat-back removed - stock downpipe/cats intact. Spare tire removed. Portion of the back seat removed. Driver weight @ approx. 240. Torque Solutions pitch-stop mount in place. Completely on factory wheels/tires/suspension/etc...

It was approx. 55 degrees whenever the pass was made at Pittsburgh Raceway Park (elevation approx. 1250').

60' - 1.8464
330' - 5.3426
1/8 - 8.3167 @ 82.96
1000' - 10.9223 @ 93.36
1/4 - 13.1327 @ 103.73

Their timer was moving the decimal point for some reason - so it shows a time of 1.31. That lane kept doing it all day - so it cut off the hundredths place of the time as a result. The trap showed up properly at least.

3 passes during the day - this was the fastest, others @ 13.4009 @ 104.19 and 13.5135 @ 101.60 (first pass - drove straight to stage at arrival).

This video is a follow-up video to a prior trip when the weather was much less favorable and before the cat-back was removed (
).

The other car was a turbo'd civic hatch. It ran 12.5988 @ 118.36."

Soon the car is going to have a 3" midpipe into dual 2.5" quad tips. Shortly there after I'm going to probably do an SPT intake as to retain the factory warranty still. May also look into some stiffer mounts/bushings to help keep the car's movements under control.

Thanks again everyone!
-Trevor
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Old 10-22-2012, 03:07 AM   #2
Dova
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Nice times ! I thought SPT didn't make an intake for 08-12 WRX/STi ?
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Old 10-22-2012, 03:22 AM   #3
TwiceDubbin
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Quote:
Originally Posted by Dova
Nice times ! I thought SPT didn't make an intake for 08-12 WRX/STi ?
Thanks. I may be mistaken in thinking they do... I thought I had seen one somewhere, but it's highly likely I overlooked something. I'd love to go with a full 3" intake and 3" exhaust, but it's tough to commit to that as then a tune would be necessary and the warranty basically gone. Maybe in a year or two...
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Old 10-22-2012, 11:25 AM   #4
mtarr07
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SPT does not make an intake for 08+ cars...
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Old 10-22-2012, 11:32 AM   #5
dave07
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Nice runs! J&S dyno? I heard that thing's a heartbreaker haha.
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Old 10-22-2012, 11:33 AM   #6
HeroCrank
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Very nice times
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Old 10-22-2012, 12:28 PM   #7
TwiceDubbin
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Quote:
Originally Posted by dave07 View Post
Nice runs! J&S dyno? I heard that thing's a heartbreaker haha.
That's the one. It definitely does read a bit lower from what I've compared dynos to. However, FWIW whenever I was there Jason was telling me it had just been calibrated by a Mustang tech and it was spot on - though reading even lower than before haha. They're up with TPG Tuning these days - WAY closer to you - right by Clem's.

That sucks there's not an SPT intake for the 08+ cars . There goes my intake + warranty hopes. Looks like I'll just stick to getting a cat-back soon for now then.

On a different note - as promised, the slips from the day.



The weather was definitely turbo weather - and the longer the car could cool the faster it seemed to go. I wish I could've had one more run as I think I could've gone just a bit quicker. The first run was basically pulling in, teching, and going. I guess you can really see the effects of heat soak with even stock boost levels looking at the traps and ETs from round 1 to round 2 and round 3.
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Old 10-22-2012, 12:33 PM   #8
stillatoy
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nice runs
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Old 10-22-2012, 12:35 PM   #9
FCmaniac
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Great run! It's amazing how quick these cars can be even completely stock.
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Old 10-22-2012, 12:36 PM   #10
manz79
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good driving!!
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Old 10-22-2012, 04:12 PM   #11
MaddMax
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Very nice.

Launch rpms? Technique? Shift points?

Perhaps consider improving on stock like adding a PTP turbo blanket and Forge BPV. The blanket would reduce heat soak down and keep spool up a bit between shifts. The BPV would just be more consistent and reliable than the stocker.
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Old 10-22-2012, 05:02 PM   #12
TwiceDubbin
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Thanks everyone for the great comments and support

Quote:
Originally Posted by MaddMax View Post
Very nice.

Launch rpms? Technique? Shift points?

Perhaps consider improving on stock like adding a PTP turbo blanket and Forge BPV. The blanket would reduce heat soak down and keep spool up a bit between shifts. The BPV would just be more consistent and reliable than the stocker.
I definitely hadn't thought much about these sorts of things that may help while still retaining the warranty. In my mind the only thing that is a "mod" is the pitch-stop mount, which isn't effecting the engine's performance - so I feel like I can say it's still "stock." I wonder how much a BPV would help though? I don't know that I'm losing anything through the stocker at the moment. The blanket and maybe a better heat-shield would definitely help. I also have thought about diff bushings and the other engine mounts.

I'm not familiar as to whether or not someone can set up a two-step without a tune? That'd be a great help for the drag-strip. I'm free-revving and trying to keep it somewhere between 5-5.5k rpms. It'd be nice to sit on a two-step and build a little positive pressure and take the RPM variable out of play. Could probably take a little more off the 60'. My RTs were horrible on the slips, but I wasn't too concerned as it was T-N-T anyhow, but a large function of that is me watching the tach and not the tree haha.

I ran first and second up to 6500 rpms but shift out of third and into fourth around 5800-6000 rpms. The car starts slowing down so much at that point and I can't go through the traps in third anyhow - so short shifting it seems to help it keep moving. I do wish the gearing was a bit taller from the factory, for a 104 trap with a 5 speed I really think it should be finishing in 3rd.

All four tires were at 33 psi. I hadn't yet reached the point in torque at launch that would require me to lower tire pressures to hook up.
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Old 10-24-2012, 10:27 PM   #13
Plasmabluewrx
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Wow definitely a very good run. Even in the great weather/ D/A that is a good time. Your other runs are more like what I would expect the car to do in good weather. Looking at trap speeds, most good drivers are in the 100 mph range at stock levels of power. To trap 3 more mph than your slower run means the car was making an extra 30whp, that's awesome weather! You definitely have skills rowing the gears too.
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Old 10-26-2012, 02:49 AM   #14
Kastley85891
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Decent dude . Nice
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Old 10-27-2012, 01:25 PM   #15
ERL2011wrx
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I was at PRP that day too. Never did get a solid pass because I couldn't get traction. The left lane is always good for 2-3mph more than the right lane.

I went 12.80 @ 107 last fall with just a tbe and Cobb AP in the left lane. Best pass in the right lane was 12.93 @ 104.
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Old 10-28-2012, 01:30 AM   #16
TwiceDubbin
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Thanks again everyone for the great, supportive feedback. Definitely cool I wish I wasn't itching so badly to mod now haha. Factory warranty... factory warranty... lol just need to keep reminding myself.
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Old 10-28-2012, 01:38 AM   #17
TwiceDubbin
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Quote:
Originally Posted by ERL2011wrx View Post
I was at PRP that day too. Never did get a solid pass because I couldn't get traction. The left lane is always good for 2-3mph more than the right lane.

I went 12.80 @ 107 last fall with just a tbe and Cobb AP in the left lane. Best pass in the right lane was 12.93 @ 104.
I recall you from PRP. Honestly, the last time I went I had 7 passes and they were split between both lanes. My fastest was out of the right. The most recent time obviously the left... Thankfully I wasn't having traction issues. Full tire pressure. Positive side of not making boost due to no two-step haha.
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Old 10-28-2012, 01:39 AM   #18
DurtyB
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Quote:
Originally Posted by TwiceDubbin View Post
Thanks again everyone for the great, supportive feedback. Definitely cool I wish I wasn't itching so badly to mod now haha. Factory warranty... factory warranty... lol just need to keep reminding myself.
I would think you might as well mod the car at this point. If you take it in and they see anything to suggest "abuse" i.e tracking the car.... they will deny warranty work anyways.
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Old 10-28-2012, 10:49 AM   #19
ERL2011wrx
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Quote:
Originally Posted by DurtyB View Post
I would think you might as well mod the car at this point. If you take it in and they see anything to suggest "abuse" i.e tracking the car.... they will deny warranty work anyways.
I would have to agree. Even with the car being stock if you start breaking stuff from drag racing the chances of them fixing it is slim. I'd at least get a good tune on the car to make sure it's running safely.

I'd like to put my car on the dyno at TPG just to compare with my numbers from Agile when I got the protune.
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