The disadvantges off a cab, does the same rules apply for an 1/8 mile track.

We use www.performancebox.co.uk in BigShows car on the 13.6 at 105.6 it showed 0-60 5.6 and 0-100 12.6, this is on street tyres with no grip at the dragstrip, so you have to drive it like Miss Daisey off the line then like the little old lady from Pasedena in her Super Stock Dodge the rest of the way (old people will get it )

You can proram to test any mph to mph you want so thus once you've worked out how many rpm per mph your car does in 3rd you can program to do 2k to 7k test in 3rd which obviously gives you an et to measure other mods or in this case IC's

 

I have the Dashdyno, while not as sophisticated as the Performance Box you are using, does have some similar features. You can program it to record acceleration runs(1/4 mi) or torque runs (one gear pulls) to get all kinds of data. The issue I'm having is the unit kept shutting off at the 1-2 upshift. I found out that if the speed drops by 10mph the unit thinks the run is over. Well, when I hit 2nd, I have enough wheelspin to hit 70mph then drop it down 11 or 12 mph. I have many runs in which I go from 0-40+ in 3 seconds then poof I just got this figured out yesterday, so I'll be going back out and light-footing it into second as well(first is just absurd) to try to get some complete runs. Sad part is I've been playing with the methanol settings and a few of the runs the car felt like it was pulling really hard.

Not sure about the 1/8 mile tracks, and I'm not sure if there are any around these parts.

One more item back on-topic. I'm hoping to test an inexpensive IAT sensor this weekend, if it's acceptable, I'll drill both horns for permanent logging and ease of switching IC's.

 

Soo is there a reason why i cant Pm big howe?

 

Should be fixed now. If not, let me know, I'll send my email. NAM has been acting funny lately.

 

The only probes I have with the system are temp probes. That's all I was going to do. Ive wanted a scan gauge for awhile now. This just happened to be a good excuse for buying one

 

Are you going to measure pressure drop?

 

If I knew how to and had the means I would. Unfortunately I only have temp probes and a scangauge II. If the scan gauge will do that with by reading the MAP sensor than yes

 

I thought IC efficiency was a function of both thermal effciency and presssure drop. Without measuring pressure drop can one really compare IC's? Is it accurate to measure boost pressure pre and post IC to determine the pressure drop?

 

ding! ding! ding! finally a science award winner. what you want is the most air molecules into the engine, i.e., the densest air you can get. the colder, the denser. the lower the pressure drop, the denser. and vice versa.

 

I understand this guys, heres the thing tho.

I don't have the tools, means or time to do every type of measurement that there is. I have simply offered to do some temp testing. I'm just a fellow enthusiast like the rest of you. I don't do this for a living hell, I'm not even that informed on the simple testing that I plan on doing.

Long story short, what I'm doing isn't going to be the end all beat all what IC is best. I'm sure there will be much great debate over the info I gather and thats fine. Its going to be simple information about IC cooling during street conditions and whatever I can log from a Scangauge. Thats it...

I'm doing this because I'm curious as well as other out there in the community.

 

Rob,
this is why Big Howe should be doing the tests as he has gathered data for NASA . I do applaud your willingness to take the abuse you are about to get for testing unscientifically. Maybe we can somehow get Howe to come done to SLC for the weekend and help?

 

Jan, we don't need a rocket surgeon do we?

 

in this instance.... yes

 

I used one of these this past weekend on a road course. EVERYONE that tracks their car needs to buy one. I picked up a good 2 seconds a lap on a 1.30 or so lap time track. For 500 bucks (US) it's one hell of a tool.

 

I'm certainly not against having a NASA scientist on board

I guess it comes down to what I'm willing and not willing to do to my car and what your ideas are Jan. If he wants to come down and help with what were doing that sounds great. If I have to do any modifying of my car just for this testing, I'm unwilling to do that. Throwing some probes in my airstream and hooking something to my cars comp I'm ok with.

 

Sorry I forgot to reply to this question last night.

The data box is a Measurement Computing data logger
Its running MCC DAQ Software version 5.50
Instacal- Installation application
TracerDAQ- Strip chart/data logger
SoftWIRE- Graphical Programming for Visual Studio.NET
mccdaq.com

 

He has no idea of what cometh but I too applaud .

 

Its a tough crowd I know.... very very much passion in the community

 

[QUOTE=Intense;2342337]....I have simply offered to do some temp testing... QUOTE]

i applaud your quest for data, but without also getting the pressures, you can't draw the proper conclusions.

for instance, an i.c. that shows "better" cooling than another i.c. may negate the cooling density improvement by having a larger pressure drop.

 

Will I be able to see those pressures by reading the MAP sensor with a scangauge? How is the pressure measured usually?

 

Two words - Vomit Comet

 

Have you got a link to the Gnatster thread telling us why how and where

 

Is it any wonder I don't frequent this place as much as I used to, armchair scientists and critics still abound and nothing of real value is added by them.

Real world testing provides data for real world analysis. So, testing in a real world environment will provides results for those that want to use equipment in the real world. Should there be a test plan with parameters to work with? Sure, but you also have to factor in that in the real world, since you have limited control over the environment, you can very rarely produce the same results over and over again. That's why real world tests have targets values with tolerances, not absolutes. That's why real world tests use a variety of environments, for autos, road surfaces, traffic conditions, weather, temperatures, etc.

Because testing on a dyno, and in a controlled environment establishes a baseline for research purposes, but does not establish how the product will perform in a real world environment. Because testing at the extreme only establishes how the product will perform in the extreme, so is of little value to Majority User that bolts it up to his/her car and is pissed when it does not return a 15HP increase.

That's why every automaker out there tests in the lab and then sends their units out for real world testing, that's where the real value is. That's why big budget aftermarket equipment vendors test in the lab and then bolt it up to a real world vehicle for testing. It's also why many small budget aftermarket vendors rely on real world resting, because the testing budget is small, the budget for the lab tests is proportionally smaller to enable an affordable test plan.

Another thing to consider is the variables in cars and individual builds. NO two cars are alike, including those built in a tightly controlled environment, like race cars, ask any one who builds them. Your results will vary.

So those of you demanding verifiable test results and a look at the test plan, what is your background in testing that will ensure to us that you have the qualifications to analyze the test results and comment on the test plan? Are you willing to post your resume so we can comment on that?

Didn't think so.

 

Verifiable gains were only asked for when vendors made specific claims. I would have no issue putting my resume on the table. At the same time I would request to see the vendors resumes, their testing methods and equipment, and all of the data collected for the claims that have been made so they can be verified via peers and duplicate tests. While we're throwing stones, you can enlighten us on your depth of automotive knowledge and expertise, yes?

 

I'm not trying to start a new war here, but what this boils down to is if a vendor is going to make specific claims in a public forum, they open themselves up to the scrutiny of the public, good, bad or indifferent. I doesn't matter what your background is, you have the right to ask questions of the claims.