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-   -   TG MPH difference Straight vs Step? (https://www.offshoreonly.com/forums/cigarette/257149-tg-mph-difference-straight-vs-step.html)

STRAIGHTPRIORITY 07-06-2011 01:58 PM

mine with 600's tested by powerboat.

Top Speed at RPM 83.3 MPH at 5300
Acceleration in 20 sec. 72.0 MPH
Mirrange Acceleration 40-70 MPH in 6.8 Sec
MPH vs. RPM 58 MPH 3500 RPM
MPH vs. RPM 72 MPH 4500 RPM
Fuel Economy 1.1MPG 55 MPH
Fuel Economy 0.6Mpg WOT
Sound Level 88 dBA open

kreed 07-07-2011 06:37 AM


Originally Posted by STRAIGHTPRIORITY (Post 3446190)
mine with 600's tested by powerboat.

Top Speed at RPM 83.3 MPH at 5300
Acceleration in 20 sec. 72.0 MPH
Mirrange Acceleration 40-70 MPH in 6.8 Sec
MPH vs. RPM 58 MPH 3500 RPM
MPH vs. RPM 72 MPH 4500 RPM
Fuel Economy 1.1MPG 55 MPH
Fuel Economy 0.6Mpg WOT
Sound Level 88 dBA open

This sounds right. A friend has a 94 TG full cabin with 600s and it runs just about 80 depending on load/conditions.

BDiggity 07-07-2011 08:35 AM

hmmm, i think im going to add steps to my cafe over the winter. three or four should get me in to the 90's. :party-smiley-004:

tcelano 07-08-2011 01:53 AM

Don't forget that there are other variables at play in some of the examples here besides just the steps. The step boats handle higher x-dimensions, and also many of the newer boats are running NXT setups.

I'd think if you had two identical hulls, one with 700 SCI's/NXT and the other with old school SSMIII's and BW-72C's, the driveline losses coupled with the extra drive drag would be such that it would take 800 hp or better to keep up. Now put the NXT's in a step boat, and then you have a 100+ mph package, where the old straight bottom with old drives and 700's is low-mid 80 mph boat.

With that said, don't go trying to put NXT's on an old straight bottom. If you get the props down where they need to be the NXT gearcase turns into a speedbrake.

dreamer 07-08-2011 07:40 PM


Originally Posted by kreed (Post 3446058)
Something doesnt sound right there. Should be faster....

Perfectly normal

The boat less wonder was driving:party-smiley-004:


I know the retribution is gonna hurt but it will be worth it:evilb:

nova26 07-11-2011 02:17 PM

What was the first year for the step?

CIG3 07-11-2011 02:49 PM


Originally Posted by nova26 (Post 3449580)
What was the first year for the step?

Pretty sure midway thru 2000 the TG was stepped.

Croozin2 07-12-2011 06:31 AM


Originally Posted by STRAIGHTPRIORITY (Post 3446190)
mine with 600's tested by powerboat.

Top Speed at RPM 83.3 MPH at 5300
Acceleration in 20 sec. 72.0 MPH
Mirrange Acceleration 40-70 MPH in 6.8 Sec
MPH vs. RPM 58 MPH 3500 RPM
MPH vs. RPM 72 MPH 4500 RPM
Fuel Economy 1.1MPG 55 MPH
Fuel Economy 0.6Mpg WOT
Sound Level 88 dBA open

What wheels are you running SP? Drives?

The weight distribution is also so critical on a straight bottom gun. When we picked ours up from Phil, he said "Don't add any weight anywhere in this thing. A lot of time was spent on the balance of this boat." He was right. When I tell other TG owners that I set the boat at 3500rpm, tabs up and drives on 3-4, they look at me like I'm crazy. But, carbon fiber (8500lbs), cover girl cabin (all done in PVC), a little higher X-dim and good weight distribution (there are several lead plates bolted in different areas of the boat) allow it to work without porpoising. Have seen 78.4 with stock carbed 500's.

CIG3 07-12-2011 08:15 AM

That's good speed. I know in race trim it would just bump 80.:coolcowboy:


Originally Posted by Croozin2 (Post 3450278)
What wheels are you running SP? Drives?

The weight distribution is also so critical on a straight bottom gun. When we picked ours up from Phil, he said "Don't add any weight anywhere in this thing. A lot of time was spent on the balance of this boat." He was right. When I tell other TG owners that I set the boat at 3500rpm, tabs up and drives on 3-4, they look at me like I'm crazy. But, carbon fiber (8500lbs), cover girl cabin (all done in PVC), a little higher X-dim and good weight distribution (there are several lead plates bolted in different areas of the boat) allow it to work without porpoising. Have seen 78.4 with stock carbed 500's.


Croozin2 07-12-2011 09:07 AM


Originally Posted by CIG3 (Post 3450346)
That's good speed. I know in race trim it would just bump 80.:coolcowboy:

That's the absolute BEST I've ever seen. By myself, about half fuel load and very cool spring evening air. It's typically a 75mph boat.


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