If you have a water hose coming off the rear of the water log which feeds the bottom of the headers, and this hose connects to the tailpipe, then remove this hose and cap off the rear of the water log with a pipe plug, and cap off the tail pipe side with an apporopriate sized cane end.

I discovered that Mercury racing had removed this hose on later 600/700 motors because of the many water pressure issues with the 600sci and 700sci motors they were having.

This hose is one of the major causes of low water pressure and possible header discoloration.

Removal of this hose is explained as part of the water re-route for the innercooler on these motors that is included in Whipples upgrade kits.

Chris

Chris thanks for the help that cleared it up for me.

According to my diagram you also have to drill a larger whole in the tail pipe feed bypass hose

I could not open the file you attached, but yes, we also opened up the water restrictor holes in the top of the tail pipes.

I would love to be able to open that file.

Chris

Chris I finally got a new scanner see if you open this one

Has Dustin finished and sold you a new flame arrestor?

I was able to open your file.... thanks... that is very similar to what we did.

The engine process was delayed due to the extreme time it took to develop a CNC program for the heads.

The motor is back on the dyno, and we should see some numbers today.

Chris

How do you feel about the Hydro P5X?

Any opinion / info on the Hydro vs the Merc Maximus?

Chris so you did drill out the stb. side to 13/32 at the tail pipe

I couldn't get the first one open either, this one is fine.

Does this apply to the 525's as well, or just the 600/700 SC motors?

Ragged I would have to make a phone call to confirm that, but I think that includes 525 but dont hold me to that

How did you get your boat to turn 5600 with out hitting rev limiters:party-smiley-004:

Is this a Merc recall of sorts? If you can find out I would like to know.


Mine @ 5600? :lolhit: Did I miss something here?

I drilled them both out to 1/2"

Chris

I have not tried a Maximus.
I want to try one of the 15", short tailed, Mercury labbed Maximus's on my boat to see if it provides more bow lift than the p5x.

Overall, really like the p5x that I have had labbed by Hering (they are right up the street)... I wish it had more bow lift.

A labbed Bravo lets the stern settle more than the p5x, and is therefore a bit more stable at top end, but the p5x is faster by a couple of mph everywhere.

Hoping that a 15" Maximus might be the best overall.

Does the 15" Maximus provide more bow lift than a p5x??
I don't know, but will be finding out.

Chris

gnortha,

Are we talking about eliminating the hose from the lower feed rail to the tail pipe here? I went and looked at mine this afternoon and I do have the jumper hose as well. Do you have a service bulletin number for this deal?

Thanks for the info! Your numbers sound super for a single engine rig.

I'm in the process of deciding where to go next with the props. In talking with Scott Reichow (sp) @ Merc Racing I am leaning towards the Maxes. He has told me that if he is wrong on his recomended prop he will make me a new set, not dick around with the ones he sends, but make me a new set to meet my needs. Very hard offer to beat! The rest of the prop wizzards don't want to hear about their fock ups. I sometimes wonder to myself just when these prop gurus are going to step up and take some ownership of what they lead us to believe they can do. I have a bunch of money in a set of that have gone steadily downhill from day one, the comment is "Well I guess if I had it to do over ..."

Back to this water routing issue ................. Does this involve the 525's as well?

Here you go guys...

Bolt on another 20+ horsepower in the over 730hp range.
Brought to you from your friends at Whipple Industries.

This is a picture of the first piece before polishing or anodizing. You can have the billet ends color matched to your motor.

Chris

Update: 600sci/700sci Whipple Stage VI

960 hp
850 ft/lbs of torque

http://www.youtube.com/watch?v=Sl8M-AI-ZrM

Chris

Here is a picture of the finalized air filter.
The billet can be anodized to match your motor color.

They really look great in polished form, billet clamp system gives a trick smooth look.
Polished screen and end plate with multiple angles reflect LED lights nicely:drink:.

Were you able to talk to Whipple about a group buy discount?

Hey! I take two

Here is a printout of the horsepower and torque for the 600/662/700 Sci Stage VI.

Chris

Great numbers. Pretty massive torque curve too.:coolcowboy:

So is your rev limiter at 6400? What is the stock rev limit for the 600sci?

Stock rev limiter is set at 5400 rpm.

Chris

So what is your rev limiter set at now? Just curious as to anything over 6000 going thru an SCX.

Rev limiter is now set at 6400 rpm.

Chris

Here is a picture of my motor all fresh from the Whipple compound.

960 hp closed cooled and runs great!

Chris

It has been awhile, and I just wanted to keep you all updated on my motor/boat progress.

I put this motor into my boat, and it was definately fast...100.2 mph was my best pass, with 97-99 mph being typical.

I had to do some setup work with the boat in order to get it to handle the additional power, and ended up going to a 1" shortie with 1.34 gears...It now handles like it is on rails.

During this process of getting the boat to work, I was talking to Dustin quite a bit, and expressed to him, that I just was hoping the boat would be a little faster...my original goal has always been to have a consistantly over 100 mph boat.

Dustin has always assumed, that when it came time for these 600sci/662sci/700sci motors to be rebuilt, alot of the owners would opt to put in a 1/4 inch stroker crank at time of rebuild to increase displacement to 540 cu/in. He wanted to be ready for this eventuallity, and sugessted that I bring my motor down so that he could have a kit ready.

To that end... he started on what we dubbed...Stage X... the final stage of upgrade for the 600sci/662sci & 700sci engines.

We setteled on a Callies stroker crank, and custom JE pistons, in order to raise the compression to 8.2.
Original compression was 7.3 due to the re-shaped cumbustion chambers in the ported heads.

We also decided to put on a KE oil cooler in order to keep oil temps down.

I will keep you updated on the progress.

Chris

I decided that it was time to go to go with raw water cooling, because I am concerned that the heat exchanger will not keep up with the projected 1050 horsepower. To this end, Dustin fabricated adapters for the front of the heads to feed the headers, and a setup that will keep the stock serpentine belt.

Chris

Stage X!!! Wow....good luck!! You have led the way for all us 600/700 owners! Thanks for all the help.

What the front end looks like...sans the closed cooling.

Chris

What a difference. Now it looks like an engine without all that crap on the front. Looking good. Talk to you soon Chris.
Eddie

Very interesting. Why wouldnt you try a really big oil cooler before getting rid of the closed cooling?

Oil temps wern't the problem. Water temps were.
Do you mean try a really big heat exchanger?

The block was getting hot spots in it at the rear two cylinders, and needed more water flow. We will be venting water off the front of the cylinder heads to the headers, and off the back of the intake manifold.

Chris

Things are moving along:

Looking good Chris!!!

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.

x,
Wow, impressive #'s!:drink: Who did the upgrade? You guys are tempting me to ask for a pair of these for X-mas!:drink:
Dean

The Stage 2 upgrade is very simple to install just remove the computers and send them to Whipple and they will reprogram them and send them back with the parts to reroute the water to the inter cooler along with a smaller pulley and a new belt. Dustin told me to prop my boat to run at 5600 but it was Ok to run it at 5800 for short runs, the rev limiter is set at 5850 now. I'm sure Chris has a lot more info on this upgrade or just Call Dustin at Whipple he is a good guy and was a great help when I did mine.
John

Old belt should of worked.