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07-16-2017, 10:17 PM #181Screaming And Flying!
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07-17-2017, 07:17 AM #182
SST-45 is a different story and was based on the production 50/60 2 cylinder powerhead from 1980. No OMC modifications was done the the powerhead just stock.
What made the SST-45 unique was the midsection/gear case but the powerhead was a production. I dont believe the 70HP.. maybe 60HP a very good day.
My SD effort was based on the 55 from 1978. Not a good engine and was replaced with another "bad" powerhead 1979.
We tried the new stock Evinrude 60 2 cyl. 1980 when it was released from OMC in the UIM SD class but the Mariner 60 was much faster. (Also 2 cyl).
Bertil Wik was racing the Mariner 60 in the UIM SD class and he won every SD class race for years. He got the nick name "Super Bertil" from that era.Last edited by lars strom; 07-30-2017 at 10:28 PM.
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mattmak77 thanked for this post
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07-17-2017, 08:42 AM #183
The SST-45 is using the powerhead from the 50/60 model year 1980 (picture). Its a better powerhead than 1978/79 but still not very powerful.
The best way to tell a 78/79 from the 1980 model year is the 1980 have one bolt for the lift eye..the older two bolts.
Worthless info but a fact.
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07-17-2017, 08:46 AM #184
Evinrude and SST-45 was the start for F1 Shaun Torrente ..!!
http://svera.se/blogg/evinrude-and-s...haun-torrente/
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07-17-2017, 09:07 AM #185Screaming And Flying!
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it was Racer that told me, he has had dozens on his dyno all 70hp.
it has more comp than stock plus the almost dry custom megaphone has to count for something
The 45 block from 1986 is different than the original as its a permamold or lost foam with cast in exhaust.
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07-17-2017, 09:15 AM #186
Well the 1986 production 60HP is a down rated 3 cylinder and the 1986 production 2 cylinder is only 40/50 HP.
The 1980 2 cyl block is more or less the same all the way up. First year with better sleeves and exhaust.Last edited by lars strom; 07-17-2017 at 09:38 AM.
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07-17-2017, 09:51 AM #187
The fist picture is the 1979 55 HP 2 cyl, with the old style exhaust manifold. The second picture is the 1980 50/60HP 2 cyl, and you can see the old style manifold is replaced with what you call lost foam with cast in exhaust.
First year for this and a very reliable two cylinder engine but not a lot of horsepower.
This was a big seller in Sweden and OMC replaced hundreds of 1979 powerheads with the new style (Warranty) More or less every 55-79 blow up.Last edited by lars strom; 07-17-2017 at 10:25 AM.
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07-17-2017, 10:16 AM #188
SST-45 was popular in Sweden also in the mid nighties. Here is Tobias Tejby racing. I was with Tobias in Cypress Gardens,FL 1995 for the SST-45 World Championship race.
If I remember right was Duke Waldrop from OMC the officer of the day.Last edited by lars strom; 07-17-2017 at 10:24 AM.
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07-17-2017, 10:56 AM #189
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07-17-2017, 11:29 AM #190
“Facts from the factory” 1978 by Mark Spencer.
http://svera.se/blogg/facts-from-the...-mark-spencer/
Jimbo McConnell in his OZ class # 191 Molinari / Evinrude V6 3 liter looper Fuel Injection.
First picture
Action was hot and heavy in the corners for the OZ class boats as Fred Hauenstein #68 and Ken Stevenson #201 fight it out in amazing similarly painted Johnson outboards.
Both drivers was powered by OMC V6 3 liter looper Fuel Injection engines.
Second picture
Last edited by lars strom; 07-30-2017 at 10:29 PM.
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07-17-2017, 02:16 PM #1917000 RPM
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What were the specs for UIM SD class?
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lars strom liked this post
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07-17-2017, 02:29 PM #192
Don't remember 100% but it use to be max 700 cc production homologated engines. (Archimedes Penta was more or less the only engine for the class)
Production gearcases with reverse. I think it was 1978 UIM raised to max cc to 750 so the new Evinrude and Mariner could be used. A minimum length and a minimum seating area was also in the rules for all S classes at that time.Last edited by lars strom; 07-17-2017 at 03:36 PM.
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Mark75H liked this post
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07-17-2017, 02:36 PM #193
Last edited by lars strom; 09-17-2017 at 04:21 PM.
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07-17-2017, 03:03 PM #1945000 RPM
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07-17-2017, 03:23 PM #195
Here is some Scandinavian UIM SD race boats from 1976/77
before UIM raised the cc to 750.
Cats and V-bottoms was used. The #251 is under a record run 68 MPH.Last edited by lars strom; 07-17-2017 at 03:37 PM.
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