View Full Version : 17.5 Faster or slower than Brushed Stock?


omnis85
12-16-2007, 03:41 PM
I wanted to hear from the general public in all honesty here. What have you found to be faster? 17.5 bl or Stock Brushed Motor? 17.5bl 4 cell vs Stock Brushed 4 cell.

What I have found was BL was slower up front but a tad faster in the end. SO does this mean the BL motor is faster all around and have a clear advantage?

I want to gather race proven facts not observations or guesses.

Does a certain Brushed motor have anything to do with it? Co27,Epic X,Monster,etc..... 17.5 is one motor, there are MANY different types of Stock brushed motors and tuners out there where as there is one MFG making these 17.5 motors and there is no tunning done by a middle man. Splitting hairs? lol

Are the opinions of 17.5 being faster because the racers cars are not up to snuff and dismiss it as its brushless so automatically its tagged as having the advantage?

As I stated looking for race proven results from everywhere as we seem to be running into problems everywhere we run now, BL or Brushed.

Thanks in advance for your posts as I am just wondering and waiting for this time of our racing to settle down but looking grim because there are so many variables in place.

Fasthobbys1
12-16-2007, 03:56 PM
Hi Ken here is a interesting comparison for you.Couple of weeks ago I raced at Turn 4 with my Sk,I ran stock 27t so did Casperbase while Oldtimer and Mike Sisson ran 17.5,first heat Casper and I were faster then the 17.5's geared up then they got faster and faster until they were noticably faster at the end and up front they just got into a "mishap" and did not do more laps than us but made up a whole lap after the mishap and ran out of time.So at Turn 4 which is a large banked oval, brushless is faster in my opinion
Bud Smedberg

Racin'Jason 8
12-16-2007, 04:16 PM
What I have found was BL was slower up front but a tad faster in the end. SO does this mean the BL motor is faster all around and have a clear advantage?



Yes, yes, yes...the AVERAGE lap times come out a tad better with BL. But you have to compare apples w/ apples. Meaning the same fast guy with the perfect chassis running both. The brushed is only faster for maybe a minute at best...but the remaining three or four minutes (depending on where you race) goes to the BL.

swtour
12-16-2007, 10:30 PM
omni,

I think it was the Oval Masters race where I was looking at the lap times between STOCK and 17.5 - see if you can find those results... they were very interesting...

omnis85
12-16-2007, 10:42 PM
omni,

I think it was the Oval Masters race where I was looking at the lap times between STOCK and 17.5 - see if you can find those results... they were very interesting...
very intresting stock brushed 1 lap over 17.5 huh.....

pmsimkins
12-17-2007, 02:31 AM
You need to consider the relative talent of those in both classes at Oval Masters. Jody Miller is one of the best stock racers around right now. The laps would have certainly been different had he been running 17.5.

I see the two classes as being very close.

I see this question a lot. My first thought is always "who cares"? They are close enough, run them together. Are a 70 watt stock motor and a 62 watt stock motor equal? Nope, so what's the difference.

Jesse Bean
12-17-2007, 08:48 AM
very close.... but 17.5 has slight edge usually only about a lap faster than the fastest stock cars.

Flipper13
12-17-2007, 09:29 AM
Jesse --I ran 17.5 at ovalmaster and we were about one lap slower than stock. Stock was 55 laps, 17,5 was 54- I think. 17.5 is 54 laps on Greenville site as posted for 12/8.

Racin'Jason 8
12-17-2007, 09:35 AM
But you have to compare apples w/ apples. Meaning the same fast guy with the perfect chassis running both.

You guys don't get it...one race doesn't tell the story with a mixed bag of talent. So, if a brand new racer ran a 10.5 against Jody Miller with a brushed stock and Jody won, you would say that stock brushed is faster than 10.5? I see we don't have many engineers/scientists out there.

brian0525
12-17-2007, 10:21 AM
Jesse --I ran 17.5 at ovalmaster and we were about one lap slower than stock. Stock was 55 laps, 17,5 was 54- I think. 17.5 is 54 laps on Greenville site as posted for 12/8.

55 LAPS HAS BEEN RUN AT GREENEVILLE IN 17.5!

swtour
12-17-2007, 11:46 AM
when looking at the results from the masters, don't just look at the 'FINISHING TIME' look at the lap times.

Although, it's been a couple weeks since I looked and I've looked at a WHOLE lot of results since them - I don't rememeber...were they posted with .1's or .01's?

To see true results, you need to be able to see the lap times to the .01's and see HOW STRONG the 17.5's are at the end of a run. Don't just focus on the MAIN EVENTS either...look at the runs made during QUALIFYING...and also look at WHO ran the times in each class... and what or how much thier skill levels compare to each other...

hazeracing
12-17-2007, 11:56 AM
omni,

I think it was the Oval Masters race where I was looking at the lap times between STOCK and 17.5 - see if you can find those results... they were very interesting...

the laptimes have been better at thattrack in 17.5 lately i had a 4.30 at the ovalmaster for a fast lap now it a 4.19 with afew .2s up front 55 4.03 is my best yet but that was with 1 sec mishap
56 will be here soon

J-Dub Racing
12-17-2007, 12:21 PM
Have Jody Miller or Jesse Bean slap a 17.5 motor in and see whats up. They will be a lap faster than stock. No offence to the guys running 17.5 at the masters, but Jody and Jesse are on another level at that place in stock. Through everything that I have read the 17.5 is a little faster. But to get things going and in the transition period I dont see why on a club week they cannot run together. If there is complaining award the win to the fastest stock and 17.5. For big events though there is no way you can run them together. You know how us oval guys are....we will complain about everything. :p
Thanks
Joel White

swtour
12-17-2007, 12:31 PM
There are a lot of factors when comparing data...for instance

DRIVER
Set-Up Experience
Track Conditions
How many Fast Cars in the same heat
Traffic

As has been pointed out, some peoples lap times have improved at this track since the Oval Masters too.

But, something I look/looked at from being able to compare these two was knowing that guys have had their STOCK knowledge for a long time...they know what and how to get the most out of it...where the 175 was BRAND NEW

If you set the 17.5 TQ run next to the TOP 2 runs in STOCK and look at the lap time curves...and compare that data, without knowing or seeing the actual event you would have to say "In this case" the STOCK motors pulled Harder/Faster up front..and fell to be about equal at the end...and we've seen similar results at other places.

This thread basically asked which one is FASTER/SLOWER and really there is currently NO answer to that question...they are everybit as fast as comparing 2 guys running the exact same motor...one goes a little quicker than the other, but which one on which run is probably not 100% MOTOR related.

Here's the Comparision for 17.5 vs STOCK from the 07 OM.

http://www.southwesttour.com/images/ovalmasters_175_vs_stock.jpg

Seven
12-17-2007, 02:46 PM
sorry didn't read swtour's post properly