G-Tech Pro to be Used in Product Testing

[RaptorRacing]

Hey Guys;

after spending a week trying to get local dyno's to give me a good deal on testing products I decided to give up. There aint no way in hell I'm going to pay over $200 to get a before and after dyno run of a product under development.

So; I decided to go the G-Tech route until a local dyno can give me a good deal on before and after mod dyno's. The main reason I decided to get this is because before I get something designed and fabricated I want the customer to know exactly what they're getting into. The RR model will allow me to upload all the before and after runs on my pc so you guys can see exactly what the before and after runs are like...here's a pix of the pc software:

http://img.photobucket.com/albums/v346/raptorracing/bkgd-pass_dr.jpg

This unit will be first test on the divorced downpipe that will be built for scarletlizards 7mgte MK2.

I'm well aware that nothing can beat a dyno; but what I'm looking for here is not 100% accurate results. I need a before and after percentage; if I can show product A gives you a 10% increase in power I've done my job. And if it doesn't work to my liking then I still plan on going the dyno route. I don't really see the sense in designing a product; putting it into production and not have before and after results...just makes no sense to me.

Stay tuned; as I'll put up a full write up of the Divorced Downpipe and thoughts on the G-Tech RR. Over the next little while this unit will be used to test a few other products that are under development so it will see a lot of use.

For Those guys that are interested if I sell more than 3 at a time I can sell the RR Model for: $275 + Shipping; and the SS Model for $183 + Shipping.

Feel free to ask any questions on this unit...for more information go to www.gtechpro.com .

[SupraWes]

The RR is really good, I am happy with mine. Just keep it scientific by doing all your runs at the same place going the same direction, noting air temerature, etc

[RaptorRacing]

The RR is really good, I am happy with mine. Just keep it scientific by doing all your runs at the same place going the same direction, noting air temerature, etc

Roger that...thanks for the tips Wes...I'm already 'shopping' for a nice flat road to do all the testing :).

[StanS]

Barometric pressure too since: density = Pressure x (a constant) / Temperature

[RaptorRacing]

Yup...good point. When testing I plan on testing before and after on the same day; using the same road...hopefully conditions don't change to drastically in the time it takes to swap a couple of parts.

[StanS]

If it's not too much work, test it unmodded, modded, and unmodded again. If both unmodded runs give the same results then you're pretty sure things didn't change during the test.

[drftsupramk2]

I really like the fact your testing your products in this way! I love putting parts in one at a time or switching them out to test the different responses. It helps gain a better knowledge of exactlly how each piece helps you car perform. I usually do it by seat of the pants meter, cause I can't afford the dyno. I am interested in how the ddp will turn out, I have been a fan of these and guess that it will do well! great direction George! keep us posted!-Large Larry

[TOYMAN321]

I have the second version of first generation g-tech, and though the first gen's do have their downfalls it has been useful to check mods. I never used it much on the supra but we did use it much more working on our rally cars (R.I.P. WRX and Mini).

The way we tested was to start slow and get the car up to the 1:1 gear and then do the run. This way the jolt of taking off the line and suspension flex of doing so didn't mess with the numbers.

How easy is the RR's to use wes? I've toying with picking one up.

[RaptorRacing]

Ok...quick update as I'm at work and we're crazy busy tonight. This baby rocks man...did a quick test with the corolla yesterday...i love this thing. I didn't play with it that much and the roads were wet yesterday after work...results below.

Tireshredder is meeting me in the morning and we're going to do some playing around with his beast...will update thread tomorrow. So far; i'm impressed...

http://img.photobucket.com/albums/v346/raptorracing/gt.jpg

[85mk2]

Looks like the RR is an independant unit. How do it read the RPM?

Does the RR has wire harness hood up to the ECU? or any sensors?

[RaptorRacing]

Both units read the rpm signal through the cigarette lighter...calibrated properly it's within 100rpm of the actual signal...it's pretty cool.

[85mk2]

Both units read the rpm signal through the cigarette lighter...calibrated properly it's within 100rpm of the actual signal...it's pretty cool.

The cigarette ligher plug could only give 12v output... I can't understand, how it read the rpm signal?? Feel very confuse... :rolleyes:

[RaptorRacing]

GTech Support is very weary of telling you exactly how it's done...here is the best answer i have found:

The pickup is through the altenator signals sent through wire. Idiling the pulses are slower. Rev the engine and the belt turns the altenator quicker causing the pulses to generate quicker. This is why you have to calbrate the rpms for each vehicle. Because most vehicles will not turn the altenator at EXACTLY the same speed as another. The reason I suspect they did it this way was because of a variety of different ignition systems available. Such as some MSD ignitions that actually causes plugs to fire twice very rapidly. If you were to record the signal from that then it would be WAY off with no way of correcting it.. Doing it from the altenator gives better flexibility for the common user.

As an end user the technical reasoning behind how it works is not entirely important to me unless the unit doesn't read the signal properly. I've tested the gtech in the following cars and so far the signal is dead on to what is showing on the tach:

84 Supra 7mgte
84 Supra 5mge
88 Supra 7mgte
89 Supra 7mgte
91 Corolla
01 IS300
04 Protoge
04 RSX

I hope that helps....

[StanS]

If u have inductive pickup, can't u read Ne signal from distributor that goes to the ecu and which the ecu uses to determine rpm?

[RaptorRacing]

Seeing that it works through the cig lighter why would this matter?? Not trying to be an a pain here but I didn't buy this unit to reverse engineer it. As far as the rpm signal is concerned this device is 99.9% accurate...I'll leave the how's; if's and why's to you guys...knock yourselves out.

[935motorsports]

I'm thinking about the SS as well.

It would be nice to compare runs.

[RaptorRacing]

Robert;

spend the extra few bux and get the RR; you can store data for 4 cars and then upload them to a pc. The SS does not give you the option to upload your results...that feature alone is worth the extra bux...ciaosy.

[935motorsports]

IC

I'll have to look more closely. I thought the RR only added the "road race features".