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Old 12 August 2009, 08:06   #11
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ecus

we bought a 175 opti in the end. However we nearly bought a similar rib with a 150 where the "nameless" dealer said he could just source a 175 ecu to up the power. Only problem was that the warranty would be invalid. Wouldnt be a problem if you had a 150 outside of the warranty already. He had quoted 1200 i think for the new fitted ecu.

Whether or not the 150 ecu can be toyed with to produce the 175 power will no doubt be found out. All the car boys do it, however when you chip a 150bhp 1.8 golf gti turbo for example, you get about 197bhp max (as i have) but when you chip the 180bhp same model engine you can get about 210. Same engine and ancilliaries but ecu itself must be different. Probably like the 150 and 175 opti (i know the TT and other VAGs used the same engine, but they had different ancilliaries to produce 225 which can be chipped to 245 plus.)

Point it, it must be possible to do something. Good luck to the thread starter i say, though i doubt massive gains can be made due to there being no turbo?!!!
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Old 12 August 2009, 09:19   #12
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Country: UK - England
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Boat name: SMH Rib / War Shot
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Engine: 10hp Yam / 150hp opt
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Quote:
Originally Posted by Dirk Diggler View Post
Nope, all 3 available as 1.87:1 and 2:1
But does the 135 not have a different ratio as standard offering?
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Old 12 August 2009, 09:23   #13
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Country: UK - England
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Boat name: SMH Rib / War Shot
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Engine: 10hp Yam / 150hp opt
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Quote:
Originally Posted by Dirk Diggler View Post
If only it was that simple. The throttle body is the same part no for the 115 opti through to the 200XS, so all the 2.5 litre motors share it.
That's what we're getting at - similarities. The important thing to know / find out are what are the differences between the engines?

I have been told that the ECU is different. But at over 1200 to change it it's not good value.

I can see that my throttle butterfly doesn't open fully - does it on the 175?

What's the difference between a 150 and a 175?

An extra 25hp would be handy if it's simple, cheap and reliable to achieve.
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