5 extra HP on GS500F?

[rock_rebel]

Last night I compared the specs of both a GS500E and F and noticed that Suzuki has shaved off 5 extra horsepower on the GS500F engine. Is there a way to recover this extra HP? I know it probably wouldn't make much of a difference but it's pretty much for my own sake to know that I'm getting the maximum performance out of this bike.

[Deros514]

5hp on something that makes so little is quite a lot when you think of it in percentage terms. I'm going to say the figure is most likely a more accurate representation of the GS power output than the older claims.

[rock_rebel]

5hp on something that makes so little is quite a lot when you think of it in percentage terms. I'm going to say the figure is most likely a more accurate representation of the GS power output than the older claims.

The GS500E has 52HP compared to the GS500F with 47HP. So are you saying the GS500E, though with the extra 5HP as noted in the specs, actually has only 47HP?

[007brendan]

5hp on something that makes so little is quite a lot when you think of it in percentage terms. I'm going to say the figure is most likely a more accurate representation of the GS power output than the older claims.

The GS500E has 52HP compared to the GS500F with 47HP. So are you saying the GS500E, though with the extra 5HP as noted in the specs, actually has only 47HP?

That seems more likely.  The switch occurs in '97, though I don't know of any significant design changes that happened in '97 that would have dropped 4 ponies.

[mister]

Ok. The reason is.... at the end of 96 and beginning of 97, Suzuki got in a new Marketing Director. He wanted such a huge mahogany desk that is sucked all the Magic out of the engine. Five horses going was the result.

When he left - only a year or so ago - they were able to flick the horse power hungry desk and put the Magic back into the bike. The new Director of Specs couldn't be stuffed updating the numbers so left it as it was.

Hope this helps.

Michael

[gsJack]

The Suzuki UK site used to show that 52 HP figure while tests here claimed about 40 HP on rear wheel dyno tests.  I believe that UK figure was HP at the crank compared to rear wheel HP as shown on road tests in our mags.  There has been no significant change in the reported HP from the first test in 89 to the last GS-F test of 2004. I've recorded all the published GS500/E/F tests I've found in US publications:

http://img.photobucket.com/albums/v443/jcp8832/GS500tests.jpg

The GS500/E/F has about 40 rear wheel HP, always has and always will.  With a good job of jetting and with intake and exhaust modifications you can get another 10% that will carry thru to near redline and not drop off after 9500 rpm like stock GSs do.  Back when the GS was brand new Vance & Hines reworked one and included a 555 cc big bore kit and porting work as well as their V & H exhaust and intake mods and only claimed a gain of 10%.

[black and silver twin]

look at most any stock gs500 dyno graph, f or e, they both make 39 hp at the wheel. they all make the same power when stock

[Chanse]

Different dyno, and testing methods, and blah blah blah, The other difference would be different jetting for different countries and different emmission standards. But they all put out the same horse power. And your gonna have a big difference between claimed horses and at the wheel because claimed horses are gonna be at the flywheel because DING SURVEY SAYS..... the numbers look better to the consumer. When traveling through the power train your gonna have parasitic losses.. in the tranny, chain drag, dragging brakes (not much) and rear wheel. ( rotating mass). Thats a quick expalination. Ill let all the techies jump in that wanna show off how big their brains are for the long explaination. I really dont feel like typing it all out.

[GAS]

Here in Brazil the earlier GS's were sold as 52hp and the newer ones as 47hp, too.

But here the difference is easily undertandable since the newer models have both catalitic converters and PAIR system, what take some HP's for sure. The older models put side-by-side (stock vs stock) run a little better than the newer ones, specially at higher RPM...

[gregvhen]

Ok. The reason is.... at the end of 96 and beginning of 97, Suzuki got in a new Marketing Director. He wanted such a huge mahogany desk that is sucked all the Magic out of the engine. Five horses going was the result.

When he left - only a year or so ago - they were able to flick the horse power hungry desk and put the Magic back into the bike. The new Director of Specs couldn't be stuffed updating the numbers so left it as it was.

Hope this helps.

Michael

yep. i read that too somewhere. i think it was in time magazine. but seriously, if you want those 5 horses back you gotta fill your bars with skim milk. the stock 2% thats in there is too restrictive

[mister]

Ok. The reason is.... at the end of 96 and beginning of 97, Suzuki got in a new Marketing Director. He wanted such a huge mahogany desk that is sucked all the Magic out of the engine. Five horses going was the result.

When he left - only a year or so ago - they were able to flick the horse power hungry desk and put the Magic back into the bike. The new Director of Specs couldn't be stuffed updating the numbers so left it as it was.

Hope this helps.

Michael

yep. i read that too somewhere. i think it was in time magazine. but seriously, if you want those 5 horses back you gotta fill your bars with skim milk. the stock 2% thats in there is too restrictive

+1 on the skim milk.

And remember, never, under Any circumstances, go with Powdered Milk.

Michael

[black and silver twin]

Wow, i didnt think the gs needed a cat to be clean, that would definitely hurt power. so let me rephrase what I said earlier, All American gs500 make the same hp, 39whp stock. except in california, they run even leaner and make slightly less power.

[Shaddow]

I've never seen an Aussie one with a cat either.

[The Buddha]

It totally compensates by reading 10 mph more. That replaces all the lost hp.
Cool.
Buddha.

[gregvhen]

It totally compensates by reading 10 mph more. That replaces all the lost hp.
Cool.
Buddha.

hank hill voice:  yeeup

[GSteve]

More HP equals more heat. This limits how far a design can be stretched. There are very few air-cooled motorcycle engines made anymore and the ones that still exist show the same horse power year after year. Back in the days when old-school triumphs BSAs and Norton ruled, owners would hop them up and they wouldn't last or required huge maintenance. That's why Japanese moved to multi cylinders to get more valve area per CC. You can't do that with a GS500. A few more HP might be obtained at quite a cost, but, better to go after parasitic loss, streamlining, and weight reduction to get increased speed

[Watcher]

{snip}

Post with caution, this thread is over 8 years old!

Not that the topic is uninteresting, but "necroposting" is generally poor etiquette. 

[twocool]

horsepower and speed....

The formula for increased speed is the cube root of the horsepower increase..

In plain English...a 10% hp increase..(110%) will yield a puny 3% speed increase....

So a 100 mph bike will now go 103...wow! (who cares)

Doubling the HP...(200%)..... so like 80 HP GS500 will only go about 125 MPH...

Eight times the HP...(800%)   so...320 HP...and the GS 500 will hit 200 MPH.....( you need 8 times the power to achieve two times the speed)

Of course that's all BS...because it can't withstand those hp ratings...and the extra weight and other tech problems mean in won't work!

Chasing 4 or 5 HP is pointless IMHO.....

Taking a relatively low powered, relatively slow bike, and making it a tad faster (3%) ...you still have a relatively slow bike.....

(although 100 mph is not all that slow at all in my book)

There are bikes you can buy, which will easily do 150, or even 180 MPH, if you are interested in going that fast...


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