175ccH Motors

[pro350hydro]

Is the GRM trim system, up / down in / out, or both.

Up and down only. It's a nice setup

[Danny Pigott]

Trim

Is the GRM trim system, up / down in / out, or both.

[Tom Cronk]

Email

Mike
Check your emails on hydroracer.
Tom

[Rex Hall]

125/175

The 125 motors put out aproximately 48 HP, and the 175 about 56 HP.

[pav225]

Thanks

Thanks to everyone for their replies.

Now we have some homework to do!

- Mike

[1977 ASH]

So do any of you guys know approximately how many horse power the 125's and 175's put out these days - at least out of the box from the manufacturers ?

Mark

[B Walker]

The boats with a hydraulic trim system got on plane much faster than those without at the last Worlds I attended.

If your doing a jetty start it is the difference between a podium finish and the middle of the pack.

BW

[Jim McKean]

175cc Engines need KOMATO 11:15 "Hatchet" Gearcase

Hello 175cc Drivers;

Put the fastest KOMATO 11:15 "Hatchet" Gearcase under your 175cc Engine for maximum speed.

Jim McKean
E-Mail: captainjimmckean@yahoo.com

Dudley Malone
E-Mail: centralmarineco@yahoo.com

[Rex Hall]

175

The GRM is slightly more expensive than the VRP, but comes standard with programmable ignition and a hydralic lift system on the tower housing which is very important for these motors if you do a jetty start.

Rex Hall

[Steve77t]

Kind of curious....

Anyone know who makes the best 125 and 175 motors?...By "best" I mean the fastest.

How big of a class is 175 in the US? World?

-Mike

That is a loaded question! Depends on who you ask I guess. All of the brands available are very good motors. Unlike their stock counter parts, pro motors only meet the displacement of class so they all have the capability to win. Drivers and mechanics that work real hard and do set , prop work, ( Like in stock/Mod) usually show their talent on the race course. All motors in 125 and 175 make about the same power and turn about the same RPM, so the tuner has the edge just like in other categories. It is like in Nascar, What do you like Fords, Chevy's Dodges or Toyota's? They all win races. My personal preference is VRP. They make both single and twin cylinder motors, But the twin is much more balanced and smoother on the driveline. Single cylinder motors are a little harder on the drive line and other parts because of inherent balance problems. A single cylinder 175 has about a 64mm bore as compared to 2 48mm bores. The twin Cylinder 175 VRP motor is about 3/4 size of a 250, and is very light as well as fast. As posted earlier VRP motors won all World Championship races last year (2009) except for 350, But we are working on that too! VRP 175 twin is about 200 euro's less than GRM. Any more questions please feel free to contact me as I can answer all your questions. Steve

[Rex Hall]

175 motors

The 125cc class still only allows a 1 cylinder motor, but the 175 can be a single or twin cylinder motor. GRM offers a single and a twin 175, and I think VRP only offers a twin cylinder motor, but I am not certain of this.

Rex Hall

Twin

The 175 can be a single or twin

[Dave M]

Single Cyl

Do they allow a twin cyl. engine in APBA Pro for this class ? I know at one point the 125 class only allowed 1 cyl.

[B Walker]

From the GRM website:

GRM T175

COMPLETE ENGINE 2010

EURO 5800.00

PISTON AND STROKE: 50.00X44.4 2 CILYNDERS

DIGITAL IGNITION

CARBURETTOR DELL'ORTO 38 MM

LIFT HYDRAULIC SYSTEM

PROPELLER NOT INCLUDED

Makes this motor around 7,900 USD. This is just a ballpark.

Call Rex Hall for exact pricing.

Phone 8165324588
email: rexfordhall@aol.com

[B Walker]

Anyone know who makes the best 125 and 175 motors?...By "best" I mean the fastest.

How big of a class is 175 in the US? World?

Fastest manufacturer changes very quickly in PRO. If you want to compete at the highest levels of PRO there are two paths: Make your own and do something different than the competition or do whatever it is your competition is doing, just try to do it better. This makes for a very dynamic playing field and promotes a "motor of the month" mentality.

Here is another observation: people that weigh more than average cannot compete well in US style PRO. The lower the horsepower of the class, the more this is true.

The boats used for Worlds (le Mans start) are very different than the boats used for APBA flying starts. The most recent Worlds held here in the US proved the Le Mans start tuned boats can also be the fastest around the course.

There were (15) 175CCH's that raced in APBA in 2009. 8 were in the southeast. Zero 175CCR's.

O-175 is one of the most popular of the "O" classes in Europe.

Disclaimer: none of my observations of PRO are criticisms of either USTS or PRO. They are just observations.

Brad Walker