Top 1/4 Mile Times ( FX - Bolt-Ons and FI )

Goodness..

Stu it's not to say that we do or we don't believe you.. It's what Ken stated at the time and what he approved to be posted on the Stat page.. that's all.

When you start making statements that are to the contrary, it is only reasonable to talk to the source in order to clear things up.

That's all.. It's not personal. It's just that facts are facts.
 
Here is my timeslip from yesterday:

1. Model, Year and Drivetrain - FX45, 2004, AWD
2. Aftermarket or stock wheels and size - aftermarket 22" NADs
3. If you were running Street tires, Drag Radials or Slicks - Street 265/40/22 tires
4. What type of Turbo, SuperCharger or Nitrous kit you are running - NA motor
5. If your motor is Stock, Built or Bolt-Ons. - CAI, everything else stock
6. Drag strip name/location - Pacific Raceway in Seattle, WA
7. Track Temperature - 65

842350873_w8jGW-L.jpg
 
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Dr.2K said:
brown, the adjustments are for altitudes of the tracks above 1k feet sea level. There are different conversion calculations for tracks 1200ft and above. Cal Speedway is roughly at 1200ft ASL(above sea level) whereas Englishtown is roughly 55ft ASL so no corrections for that track.

http://www.hardtail.com/techtips/altitude.html
Click to expand...

Guys I haven't read the whole thread and I know I'm quoting something here pretty old, but #1 I think it is very cool that you will adjust times for altitude. My track is the highest elevation NHRA track (5860') and a lot of times sea level guys just don't get the impact altitude has. My best times are actually on a day when the DA was 10, 108' (89F) BUT, don't use the site listed above. Instead, use the dragtimes DA tool which pulls in actual track data to the precise time and date at the track. You can get that right off the slip and find out the true conditions and DA that joe schmoe ran, then get an adjusted time/trap.

The other thing is that FI and NA cars need different corrections since FI replaces a lot of the lost atmosphere at altitude. Not an issue for most FX's, but heavily modified ones with FI need much less of a correction. If I used the link above and really believed the corrections above for my stock block turbo Subaru, my 12.43 @ 112 would correct to a 11.51 @ 121 at sea level.. WAYYYY to generous of a correction. 12.0 @ 116mph is more like it. My 2 cents. Not sure if this has been discussed....
 
def makes sense, the difference from altitude is strictly in the density of the air, but forced induction increases the density of the air, making it less of a difference. realistically couldn't you run a bit more boost to completely void the difference? I mean what ever power you would make at sea level at lets say 12psi, you would reach the same exact level at higher altitude but it might take say 14psi...

the stress on the motor & the breaking point of it is related to the power it's making more than anything else, so all things should be about equal in both cases of the example, 12psi at sea level or 14 psi & a higher alt? looking at it that way there shouldn't be all that much difference in correction really, at least def much less than a NA which can't do anything to compensate for the thinner or less dense air... once you can compress the air as much as you need to, the difference has to become much less really...

---------- Post added at 11:17 PM ---------- Previous post was at 11:15 PM ----------

btw, this is the main reason most early aircraft was turbocharged or supercharged, to replace the air density lost at higher altitudes
 
You have valid points and I do agree with them. The link for altitude correction was made for reference and as a loose indicator. We are not hard core racers here especially with the FX lol, but track times are fun nonetheless and the posted times are for fun and not much else. But if and as more and more FX's get FI and take it to the track than we may have to look more closely into this.
 
@turbocad6: Yessir, you are correct. With FI and especially with really built FI setups, the correction becomes less and less. The dragtimes DA tool has 3 settings IIRC.. NA, FI, and built FI. The corrections for FI and built FI are a LOT less than NA. Personally, I use the "built FI" correction for my LGT even though it is the stock block and nothing about it is all that built. But I run 23psi vs. factory 13psi.

For my supercharged boat, I currently run the factory SC, but since my Patm is 12.0 as compared to 14.7 for sea level, I will be changing out my SC next year with an aftermarket one that makes 3psi more. Most guys need to do all kinds of supporting mods, including injectors, fuel pressure regulator, ecu changes, etc. I won't need to do ANY supporting mods at all because I'll just be replacing the lost atmosphere with elevation and my boat ought to perform as if it is at sea level.

Living at altitude really makes me shop hard for factory FI vehicles/boats. Up here a turbo 4 or 6 easily thumps a big V8. Almost a crime... a lightly modified 250hp Subaru can beat a 405hp Camaro SS at the dragstrip. Well, that Camaro is a heavy pig too, but FI is huge.
 


2004 RWD VQ35DE
Stock wheels
Yokohama Parada Spec-x
Custom GT35R turbo @12psi
Built motor & built 5AT
Royal Purple Raceway, Baytown Texas (20m East of Houston)
85 degrees, sea level

10/7/2011, 10:40pm

R/T 1.065
60' 2.468
330 6.335
1/8 9.302
mph 83.42
1000 11.834
ET 13.962
MPH 105.96

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@jumbosrule: Traps of 105 and 107 look pretty good. Gaining 22-23mph on the back half tells me the thing pulls real hard on the highway. Very nice! Your launches are pretty lousy, however, but probably a limitation of the car and not the driver. If you can get those down to 1.8-1.9 or even 2.0 you should have a real good shot of a 13.0-13.2 on a 107mph trap. Running pump gas? 93?
 
It's most likely both the car and the driver at this point... My first two drag launches ever... Only room for improvement.

Talked to my shop and they said there is a built in power boost inhibit built into the oem ECU and it can be defeated. With a little launch tuning and some practice on my end, a 2 second 60 should be realistic. I've also got the ability to up the boost another four or five psi.
 
Ahh... yes many ecu's limit torque in first gear. Must be defeated! How much boost are you running? Did you get a dyno tune? How much awhp are you putting down? Running 19's or 20's? If you can get someone to video you launching it might help you set tire pressures, depending on what kind of rocking/hopping weight transfer you are seeing.
 
I'm consistently in the low 2.2's 60 foot, so you should have no issue getting down near 2 flat once it's set up for drag racing.
 
Not bad brad, did you have fun? Wish I could have made it out there, next time ill be there.

Sent from my Android
 
Here are my only runs with the 6MT. Can't find my first run slip, this is 2-3 1st run was baby launched can't remember the time, 4th run I snapped my axle.

6MT_FX35TT.jpg
 

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117.25 mph!!! :eek.:

damn bro, that's crazy... imagine you get all that power to the ground, your going deep into the 11's.... well maybe not deep, but def in there....

you ever gonna run her again?
 
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rookie did do;
1. rookie ---FX35 -- RWD --- 05 ---- Twin Turbo ----- Built ---- TS Custom -- 12.74 & 12.57 / 107.17 & 108.55 -- 2.023 ---- Verified --- Slicks ----
 
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