I finally went to the track to get some base numbers before I added my Up-pipe and U/D pulleys this week.

Only mods were a K&N, no silencer/snorkle, and an extra 3" hole in the air box.

Ran 9.38 at 80.1 mph.

Is this a pretty good time?

Temperature was about 85 and high humidity.

Just looking for some input.

Thanx,

B-Kerr

That time is probably good for a low 14 sec pass. I ran a 9.0 in the 1/8 mi at about 75. So your time should be good, but your trap speed should be even better. Check out my thread.http://forums.i-club.com/forums/showthread.php?s=&threadid=201944

Dallas, tried to follow your link but it was dead.... please post again.

I'd question the accuracy of that track. For one thing, 80mph traps would net 100mph traps in the 1/4 which you CAN'T get from those mods. The ET is probably correct though.

The cheaper track here reads high mph as well (which I why I go to the new accurate one).

Didn't realize they didn't calibrate or something... Appreciate the input

B-Kerr

Race Gas too....110oct - 1/8 tank, & no spare tire ( or junk for that mater)

mph seems too high

So I've heard. MPH is a reflection of HP, so I really don't know what to think. Same day, same time, a friend was running a carbed 4.3L S-10. He made 9.20+/- passes @ 75-78 mph. I don't know what it all means. Without dyno time, its hard to say. Maybe just bad readings at the track.

B-Kerr

Time is pretty good. Most folks in WRX's are gaining about 20 mph over the last 1/8 mile so if that MPH is good (ie tracks equipment is working you'd probably pull about 100 mph in the 1/4 at about 13.5.

There is a pretty solid correlation between power and trap speed. There are several ways the numbers can be a little off of what people would expect.

The most obvious is equipment problems with the tracks lights/computers. It happens sometimes.

If you have a good solid launch and the engine is pulling for the full run, the ET and MPH will fall in a very narrow range. If the MPH is higher than the ET indicates, it usually means the car lost traction or had clutch slippage, or bogged slightly at the starting line, making for a bad ET. If the MPH is higher than the ET would indicate it usually means the car has enough power to pull a lower ET if everything is right. If the ET is lower than the MPH would indicate, it can mean the car lost power for some reason on the top end of the strip. This could be an ignition miss, bad mixture, the driver liffting the throttle just a bit before he crosses the finish line, or shifting at the wrong shift points so the engine falls out of the power band.

People have a tendency to assume something is hinky if the numbers don't match up, but there are a lot of entirely reasonable reasons for that to happen.

You appear to have enough power to pull a high 8.7 ET on an 1/8 mile, or a little better given the MPH you got.

Larry

Well, I don't know if the car is unusually powerful for the mods, but you hit the nail on the head.... Every launch I made BOGGED seriously and pulled like hell all the way through... ie, MPH pickin up fast.

I haven't dragged at the track in probably six years... when I did it was either in a rear wheel E30 M3 or my 91 Talon AWD. The M3 of course broke loose a little, and the AWD always broke traction in 1st, but I dropped from High RPM (had a Centreforce II and wanted a 4-bolt rear - hated the 3-bolt!) Therefore, I launched more or less like street racing. The WRX,however, was not my friend. I could not make a good launch. It would ALWAYS grab and bog... the one time it didn't, I thought I was going to break something.

I am a quick shifter and have a short shift kit (like the M3 and AWD), plus I watch mph vs. rpm and shift before redline (unlike most people) when I see rpm coming up faster than speedo (proportionally) - I try to stay in the "sweet spot" so to speak.

I think you may have summed it up, but the track equip could have been off also. I accomplished what I wanted - a pretty good base to compare with when the up-pipe and pulleys are installed.

Thanks for your input!

B-Kerr

Originally posted by hotrod
People have a tendency to assume something is hinky if the numbers don't match up, but there are a lot of entirely reasonable reasons for that to happen.

Nope. We say that because he CAN NOT run 80mph in the 1/8 (or 100mph in 1/4) in a stock car period. Even with a bc. So yes, the mph is off.

just for comparison, with mbc I would trap 76.x in 1/8 and run 13.8@96 a million times.

Originally posted by hotrod

People have a tendency to assume something is hinky if the numbers don't match up, but there are a lot of entirely reasonable reasons for that to happen.

You appear to have enough power to pull a high 8.7 ET on an 1/8 mile, or a little better given the MPH you got.

Larry


And some people have the tendency to think they know what they are talking about and they really don't. :rolleyes:
I ran my stock car with only a boostmonkey and the 3/16 mod and I ran a 9.0@76 mph. There is no way a stock WRX can run 8.7 in the 1/8.

02_Scooby_WRX:

Uhhhh Let me get this straight.

You've been a member of I-club for a month, and had your car for exactly 30 days, and been to the drag strip only once with a brand new car and you are an authority on what can be done with the car?

Not to mention you can't read, as you'll note. B-kerr has already admitted that the speed might be wrong, as several of us have pointed out, that 80 mph would correspond to a 1/4 terminal speed of 100 mph which is highly unlikely!


In my post I qualified my comments with

[quote:]

so if that MPH is good (ie tracks equipment is working you'd probably pull about 100 mph in the 1/4 at about 13.5.

There is a pretty solid correlation between power and trap speed. There are several ways the numbers can be a little off of what people would expect.

The most obvious is equipment problems with the tracks lights/computers. It happens sometimes.

[/quote:]

I then when on to comment on the legitimate reasons why ET's and MPH might not match up with expectations.

If you had been on this board for more than 30 days you'd know that a lot of folks tend to scream foul for the most trivial reasons.

Using your psychic abilities I'm sure you can positively rule out the possibility he had a strong tail wind, or that he may have made modifications he's not telling us about, or he only weighs 80 lbs soaking wet, or he just might have one of those rare motors that are jewels out of the factory.

After 35 years working with cars including working in an engine rebuild shop I've seen 2 of these engines. By the luck of the draw they were essentially blueprinted motors out of the factory and out performed typical engines of their type by a significant margin.

A perfect 1/8 mile run of 8.7 ET would correspond to a power to weight ratio of 14.3 : 1, so using the listed HP rating of 227 x 14.3 comes out to a vehicle weight with driver of 3246 lbs which is not at all unreasonable.

[quote:]
You appear to have enough power to pull a high 8.7 ET on an 1/8 mile, or a little better given the MPH you got.
[/quote:]

The corresponding 1/4 mile MPH for this power to weight ratio is about 96-97 mph.


And for TypeC;

[quote:]

Nope. We say that because he CAN NOT run 80mph in the 1/8 (or 100mph in 1/4) in a stock car period. Even with a bc. So yes, the mph is off.

just for comparison, with mbc I would trap 76.x in 1/8 and run 13.8@96 a million times.

[/quote:]



I don't know about you, but I'm not willing to dismiss out of hand a number that is within 4% of the ideal. It may be a little suspect, but I have seen people make fluke runs that they spent years trying to equal.

I also know from personal experience that 76.x in 1/8 and 13.8@96 shouldn't be considered a limit to stock performace as I am hitting between 92 and 94 mph in the 1/4 at 6000 ft altitude with only a boost controller, and intake mod. I personally don't think we know what a WRX can do with limited mods as most folks are just throwing money at their cars.

There are very few of us who are exploring the limits of the stock exhaust/turbo system.

Of course you guys all ready knew all that.

Don't confuse a hypothetical discussion of legitimate variables in ET's and MPH numbers as anything other than a discussion point that is related to the question at hand.

Larry

Originally posted by hotrod
02_Scooby_WRX:

Uhhhh Let me get this straight.

You've been a member of I-club for a month, and had your car for exactly 30 days, and been to the drag strip only once with a brand new car and you are an authority on what can be done with the car?

Not to mention you can't read, as you'll note. B-kerr has already admitted that the speed might be wrong, as several of us have pointed out, that 80 mph would correspond to a 1/4 terminal speed of 100 mph which is highly unlikely!

Larry


:lol: Wow you really are a moron arent you. Yes I have been a member for a short time but that doesnt reflect my experience with cars and racing. I have grown up around both so yes I do have experience. People around here sure like to talk crap if you havent signed up for an account ealier which really shows their lack of intelligence. And yes I can read just fine, I believe it would be you that can not read as I was quoting you not B-Kerr. So get the stick out of your *** and ****. Have a nice day and find someone else to take out your stupidity on.

This was not supposed to be a post where people get pissed off at each other.... SAVE IT FOR THE HONDAS!!

Who knows what happened. I'll check with some die hard strip heads and have them compare runs in each lane at that track on their old slips.... if its a mechanical error, the mystery will be solved. If not, well, I don't have barometric readings and tail wind speeds, plus I weight 155, not 80, so it may never be known.

I'm just happy with the run, mph correct or not. I have my pipe and pulleys in and I will try and run the strip next week (auto-x this weekend in Louisville). I'll make sure and run both lanes.

Until then, let's all be subbies and be excellent to one another!

B-Kerr.

Hey B-Kerr, I hear ya. But the problem is that people ASSume they know more than they really do and say that something "CAN NOT be done" instead of just pointing out what they were capapble of in their car with similar mods and then just complimenting you on a good time.

Good job on the strip.