Offshoreonly.com - Whipple 600sci upgrade documentation

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Quote:

Originally Posted by JMPH (Post 3525611)

Old belt should of worked.

Not on a 600SCI, only the 700SCi uses the same belt.

Quote:

Originally Posted by xcpilot (Post 3525319)

Thought I would bring this thread back to life. I am currently just beginning testing on dual 600 Stage 2 Whipples and have some questions for Chris. I am concerned with running these motors near 6000 rpm. Did you run your motor for extended minutes at max rpms during the poker run. If so, for how long? Do you have any concerns about the valve train at these rpms? My engines have 60 hours on them and the upgrade was just done. So far they run exceptional. I picked up over 12 mph running the same props-so I am now on the rev limiter. :drink:I have just had the props pitched up some and should have more testing done in the next two days. Also impressive is the low end acceleration and mid range pull. The torque of a pair of these engines is unlike anything I have experienced. Pushing a 35' boat at 100 mph now only takes 2/3 throttle! :eek:Previously you had to work for it.

Glad to hear everything worked out well. 600SCi Stage 2 warning is at 5850 with max rpm at 5950. For short burst, 5850 is not a problem IMO. But for continious running, 5650-5700 will significantly help so I would work on the props a touch. I think you'll see even more MPH with the propping right, as the 600 flat lines on top for HP.

Can u do the 4.0 supercharger for the 700 as well? It only says for the 600 on the whipple site.

Quote:

Originally Posted by precisiondetails (Post 3734428)

Can u do the 4.0 supercharger for the 700 as well? It only says for the 600 on the whipple site.

Yes.

Give Dustin a call.

Chris

Quote:

Originally Posted by CB-BLR (Post 3734553)

Yes.

Give Dustin a call.

Chris

So then I take it that since yours made 960 with the closed cooling, that the 700 would make 1060, that sound about right?

Quote:

Originally Posted by precisiondetails (Post 3734628)

So then I take it that since yours made 960 with the closed cooling, that the 700 would make 1060, that sound about right?

The only differences between the 600sci and the 700sci are the cam, the bigger innercooler on the 700, and a smaller pulley on the 700 in order to create more boost.

My 600sci at 960 hp already had a bigger cam than the stock 700sci, and I was running a smaller pulley (creating more boost) than the 700sci.

So....no.... at that level of modification...the 600sci modded and the 700sci modded....would make about the same amount of horsepower...aprox 960.

In addition...we discovered that at 960 hp..the closed cooling system was maxed out as far as keeping the motor cool.

I hope this helps.

Dustin has more exact info...and I suggest you contact him directly... he is "the man" when it comes to this stuff.

Chris

Quote:

Originally Posted by CB-BLR (Post 3735158)

Thanks Chris

Chris, can you please give us an update on the status of your motor?

He doesn't own the boat anymore... Had just over 1050 HP last I saw, went 104 ish.

This is great info for 600 SCI owners. I have been considering the Stage 1 upgrade, all depends on what is found wrong with the starboard engine today/tomorrow. No oil pressure, went from hero to zero in the blink of an eye. Hopefully something that has to do with the oil pick up or oil pump. Engine was rebuilt by previous owner 65 hrs on it, 230 hrs over all. If the engine needs rebuilt was considering 700 cams and Whipple program. Anyone done that mod.? If engine checks ok was going to throw Stage 1 at it.