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Old 07-06-2002, 02:25 AM   #1
PadreWRX
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Was 4EAT '02 WRX 13.1@104

Talking Automatic record falls at 4100ft

Beautiful night for dragging here in El Paso. Track conditions: 4100ft altitude, 80F, 40% humidity, barometer 30.00 and rising.

My mods: Cobb RT-spec w/ TMIC, Vishnu fuel rails and uppipe, STi Injectors, Supra fuel pump, Pro Torque Street/Strip 4100rpm stall TC, all synthetic, tranny cooler.

Special tricks tonight:
- The TC-lock-up mod which I engaged on most of my runs at 5500rpm (disengaging for shifts). This seemed to work best.
- 2.5 gallons of 104 octane unleaded mixed with 5 gallons of the crappy West Texas pump gas (91).
- the 3/16" restrictor mod, which brought my tuned boost from 17.5 psi to 18.5psi.

So my first runs were the best ever, here: 14.1 then 14.0 then 13.9. Awesome for my altitude. Best prior was 14.2 on pump gas. The ECU seemed to learn with each run.

Then, towards the end of the night, I decided to try the "new twist" on the 3/16" restrictor mod - I had drilled a 1/16" hole in a 3/16" connector.

Tried this out against a friend in an LS1 Vette on street tires that usually runs 13.6's. I happened to catch him a bit heat-soaked on this run, and my reaction time sucked, but here's what happened:

r/t: 1.038 (I know, I usually do better)
60': 1.839
1/8th et: 8.531
1/8th mph: 79.278
1/4 et: 13.451
1/4 mph: 101.755


The slip is attached. I checked my peak boost following the run: 22.1psi (with that "new twist" mod). I don't intend to do this often and I wouldn't have done it without race gas, but I had to do one more run to make sure it wasn't a fluke: 13.576 @ 101.854.

Props to Jorge, Rob, Andrew, and all the other 4EAT guys. I know this record won't last long but it sure feels good.

Padre
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Old 07-06-2002, 03:08 AM   #2
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Nice...esp on 4EAT
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Old 07-06-2002, 04:43 AM   #3
hotrod
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Default Great run

Great run, especially at altitude.

Larry
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Old 07-06-2002, 11:11 AM   #4
dazz1
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Great job Padre!

Your trap speed & 60ft looks good for some low 13's run.
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Old 07-06-2002, 12:38 PM   #5
Torch
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Nice run's padre!! I just cannot believe that you were at that altitude and ran such great times. It is nice to hear good things about the 4EAT, gives me something to shoot for.



Torch
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Old 07-06-2002, 12:50 PM   #6
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Padre,

i can't imagine what you'll run here in DFW sometime in the fall/winter!

nice job d00d!

sst
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Old 07-06-2002, 03:05 PM   #7
Kevin Thomas
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Default Nice time!

Congrats!
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Old 07-07-2002, 10:23 AM   #8
PadreWRX
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Thanks for all the compliments gang. It sure was an eye-opener pulling 100+ traps for the first time.

Looking at my gauges and OBD the next day, I found that I had spiked to 22psi on the first run, but the second run held between 18-20 (my VF-29 is tuned for 17.5 at sea level). IOW, this is something I don't want to do at lower altitudes, as I imagine something will blow up. The spike also triggered a P0103 (MAF sensor high input), which I assume means overboost.

Anyway, I do plan on running at lower altitudes in August. With a little race gas, I imagine I can run 13.4's all day on my regular boost. If I can find a safe way to effectively crank the boost, I may do better.

Oh, and Kevin, my apologies: you're still the fastest automatic Subaru. Mine's just the fastest automatic WRX. Go wagons!

I don't expect the record to last long. I believe Rifts is going racing this weekend with his new goodies, including valve body, so we may be seeing an automatic in the high-12's by next week.

Padre
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Old 07-07-2002, 10:37 AM   #9
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Very nice.

Bill
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Old 07-07-2002, 05:37 PM   #10
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Congrats PAdre!!!!!!! Ohh man this is really really awesome!!

Been away the whole week so i missed the thread. Congrats bro! Your TC better hold up for when i get to the track



Rob
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Old 07-07-2002, 06:31 PM   #11
alfriedesq
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Way to go !
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Old 07-08-2002, 10:13 AM   #12
PadreWRX
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Quote:
Originally posted by RobPA
Been away the whole week so i missed the thread. Congrats bro! Your TC better hold up for when i get to the track
Ha, it's not the TC holding up you should be worried about... just be careful with the juice, eh?

Oh, and get thee to the track.

Padre
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Old 07-08-2002, 10:09 PM   #13
portablevcb
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Default Tranny temps

Padre,

Was experimenting with my new tranny gage (installed in the return line, my sensor did not fit in the pressure tap locations). Also was thinking of what happens during a drag run and after.

I still think the problem is having a cooler integral with the radiator. You heat the fluid during the stall launch. System is running at high rpm during run and a lot of airflow through radiator keeping everything "normal".

After run in the return lane the rpms go very low, resulting in very little cooling effect on the engine and tranny fluids. Engine heat soaks radiator and tranny fluid. That is probably why you see an increase in temps on the return lane.

I still think a separate tranny cooler (bypass the stock one altogether) is the answer. For effective cooling after a run you would want both a separate cooling fan for the cooler and run the engine in neutral to keep the fluid circulating (if no fan, then get another bag of ice to put on the tranny cooler, or, run some of the water spray to it from the one cooling your IC with a separate pump). BTW, this should also help cool off the engine since it would still be circulating a little water through the engine and radiator.

I don't think your cooler location will be a problem. Just don't run the AC and let the new fan circulate the air. The cooler will be seeing cool night air (as cool as it gets in El Paso :-)

I will be "experimenting" with road course type stuff soon, ie, high torque repeatedly at high rpms. I will report on that separately.

Have not seen Jorge in here for a while. He might want to take note of this and offer his opinion as well.

Charlie
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Old 07-08-2002, 11:01 PM   #14
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Yeah Kevin! Old skoool!!

-Chav
Kevin is my hero!
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Old 07-08-2002, 11:30 PM   #15
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Knight Rally Team is using HUGE autotranny coolers on their cars...
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Old 07-09-2002, 12:25 AM   #16
PadreWRX
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Quote:
Originally posted by ImprezaRS dot com
Knight Rally Team is using HUGE autotranny coolers on their cars...
Where do they put it? In-line with the stocker in the radiator or not? Extra cooling fan or not?

The one I have is about 5 times bigger than the stocker. The question Charlie and I have is where to place it: should it be hooked up in-line with the stocker (that goes through the radiator), or can we move it to some other location that doesn't get heated up by the engine/radiator between runs? And since it's 5 times bigger, why not bypass the stocker/radiator altogether?

From the end of a run and the time I get back to the staging lanes, I watch temps rise 20F+. We're mainly concerned about drag-racing, but I wonder if it would help for road racing as well. If I want a good run, I have to wait 15+ minutes.

My problem may simply be placement. It was not installed in front of the AC, but between the AC compressor(?) and radiator. Too close to the radiator and drawing heat when the AC is on. Rifts, IIRC, installed his in front.

Am I making any sense here? (Not an expert.)

Padre
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Old 07-09-2002, 03:10 AM   #17
IgotWRXed
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AAAAAHHHHHHH thats some good schwag. congrats bro, u brought a tear to my eye *sniff sniff* take THAT 4eat haters.

and i know no one likes these, but i felt like doing the corrected times, and at sea level thats a 12.774 @ 107.198, give or take, and no one give me any crap for posting this

congrats again
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Old 07-09-2002, 09:35 AM   #18
PadreWRX
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Default Re: Tranny temps

Quote:
Originally posted by portablevcb
I don't think your cooler location will be a problem. Just don't run the AC and let the new fan circulate the air. The cooler will be seeing cool night air (as cool as it gets in El Paso :-)
Well, I think we have two other options as well:

1) Pull the AC fuse. This should turn off the compressor while allowing the radiator fans to run.

2) Wire up a switch to activate the radiator fans without turning on the AC (or disconnecting it's fuse).

Option 2 is what I'd like to do, but 1 may be a good temporary track solution.

Padre
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Old 07-09-2002, 10:12 AM   #19
Torch
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Default Re: Automatic record falls at 4100ft

Quote:
Originally posted by PadreWRX
So my first runs were the best ever, here: 14.1 then 14.0 then 13.9. Awesome for my altitude. Best prior was 14.2 on pump gas. The ECU seemed to learn with each run.
Padre,
I might be a bit confused on your times -vs- when you had your mods but, didn't you run a 13.8 in Ennis with your RT-spec? For you to run a 13.9 at that level indicates that you have done more mods since you were here.

That must mean that the TC-lock-up mod and the 3/16" restrictor mod along with some race gas helped out quite a bit.

If everything goes well I should have the RT-Spec W/SR-30 turbo by mid August. I will have to give the restrictor and lock up mod a try soon, as they look like they will help out a lot.

Torch
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Old 07-09-2002, 10:53 AM   #20
PadreWRX
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Was 4EAT '02 WRX 13.1@104

Default Re: Re: Automatic record falls at 4100ft

Torch, good question, here's the break-down:

13.8 @ Ennis (500ft) on 93 pump gas, NO restrictor mod, NO TC-lock-up mod.

14.6 @ El Paso (4100ft) on 91 pump gas, NO restrictor mod, and NO TC-lock-up mod.

14.2 @ El Paso (4100ft) on 91 pump gas, the 3/16" restrictor, and TC-lock-up at 5500rpm.

13.9 @ El Paso (4100ft) on a race gas mix (about 95), the 3/16" restrictor, and TC-lock-up at 5500rpm.

13.4 @ El Paso (4100ft) with same mix (95), the "new twist" restrictor mod (1/16" hole drilled in 3/16" connector), and TC-lock-up at 5500rpm.

Basically, the TC-lock-up mod gains me 2/10ths, the 3/16" mod 2/10ths, the race gas mix another 3/10ths, the "new twist" mod a 1/2 second or more (since it replaces the standard 3/16").

Of course, heat, humidity, and the barometer also factor in, so considering I ran 13.4 when it was 80F and 40% humidity is pretty amazing. A cooler, drier night might gain me another tenth or two.

I'm still researching whether or not running the "new twist" mod at lower altitudes is wise. Cranking the boost here compensates for altitude, but may blow something up at lower altitudes. When I ran at Carlsbad, CA, just the 3/16th mod alone felt way too strong. So I want to be careful.

Padre
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Old 07-17-2002, 10:57 AM   #21
RiftsWRX
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You still hold it dude! I had suck this saturday.

13.599 @99.8 with a 1.82 60fter

My best MPH was a 13.63 @100.98 but that was a suck ass 2.0 60ft Why couldn't I have had the 1.82 on that run!

This was at 19.4 PSI tapering down to 17 by redline.

Props dude! Your the man... this week

Jorge (RiftsWRX)
www.ProjectWRX.com
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Old 07-17-2002, 11:10 AM   #22
RiftsWRX
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Oh yeah...

http://www.kicksomeass.com/~dr_nick/...ICdragDAYS.mov

Look for the black wagon

Jorge (RiftsWRX)
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Old 07-17-2002, 11:12 AM   #23
PadreWRX
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Quote:
Originally posted by RiftsWRX
Props dude! Your the man... this week
Woohoo! I'm going to my dealer today to give them a picture of me drag racing and it's going to say something like, "Thanks for helping me to be the fastest automatic WRX in the USA!*" With small print at the bottom: "* for this week" They're going to post it in the lobby of the service department (cool guys).

Anyways, I ran 13.5-13.6 @ 100+ all night last Friday. I encountered two things that kept me from doing better: the ECU seemed to learn and cut back timing and/or boost; and it was a little hotter.

I heard it was pretty hot when you MWIC guys were running. On a nice cool night you ought to be able to get low 13s easy. Oh, and I saw you on the MWIC Drag Day video already. Total stealth look - stock rims and so on... though you need to tint those windows.

Oh, and when do I get my JorgeMonkey? Whatever it is.

Padre
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Old 07-17-2002, 11:25 AM   #24
RiftsWRX
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after 9/24

Jorge (RiftsWRX)
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Old 07-17-2002, 09:40 PM   #25
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Default Knight Coolers

It is great Padre to see that the 4EAT is catching on. I love them. It has been the best trans I have ever put in the rally cars. The coolers that we run are for MAX continuous duty cycle. On a very long stage it is not uncommon to see trans temps of 300 deg. Stages of over 15 miles and the Motec has shown up to 100 shifts in that space.The cooler we use is 15 inx15 inx2 in and mounted in the rear trunk bulkhead and draws air form the roof and air exits through the rear spoiler. Not applicable to a street car.
The street car we relocate the intercooler to above the radiator (ala WRC). The radiator is sloped down with slimmer fans. The trans cooler 4inx24inx3in (thick) is located in the space vacated by the intercooler and feed by the taller STi scoop. The trans lines for the cooler is right there by the starter for easy hook-up to the new cooler. I built mine to swing out of the way because it attaches to the strut bar. I use a fiberglass ducting from the back of the cooler with an inline tube-style fan for pulling air through the cooler although i may change this with two small fans and no ducting. The new tarmac car will be ready before Aug. See you out there.
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