600 ci NA build

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05-25-2018, 10:54 AM

#231

Single cat

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Pull

Just made our finial pull with some fuel in it. Made 1005hp and 858 lbs at same rpm. Time to call it good. Will post dyno run latee.

05-25-2018, 11:31 AM

#232

hogie roll

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Quote:

Originally Posted by MILD THUNDER

yep. Goes back to the thoughts that runner volume isnt the end all to cylinder heads. Architecture is the key.

id love to see the numbers from 3500-5000. My guess is its making more than enough torque to get a 32 skater up and flying

He has a multi speed trans too, so I don’t expect he’ll have an issue. Would be interesting to see how they’d do in a V.

i think a 632+ using the new big m pro series block and these heads would be the ticket.

05-25-2018, 11:40 AM

#233

14 apache

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Very impressive numbers that should get your skater to 160MPH with out a problem nice job.

05-25-2018, 09:40 PM

#234

14 apache

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Did you run any vacuum on the motors when you had them on the dyno? If you did how much?

05-26-2018, 09:18 AM

#235

Single cat

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Engine

The pumps pull around 9 inchs of vacuum.

05-26-2018, 12:03 PM

#236

Baja Rooster

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I can’t wait to hear this beast.

06-03-2018, 08:32 AM

#237

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Know the fun begins

06-03-2018, 08:31 PM

#238

dunnitagain

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Quote:

Originally Posted by Single cat

We made one pull down at 4500 but i cant remember the numbers off the top of my head but it was mean. David add more water to the pump. He said he dont like pulling motors like that down low because its rough on his pump.

Those little Superflows cant handle big torque , low rpm loads . The brake doesnt have enough diameter , for the water capacity to pull the engine down that low.
David is right , I wouldnt pull my dyno that hard either!

06-04-2018, 08:22 AM

#239

SS496

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Those look like the B&M 2 speed marine transmissions. I have a set as well in my Cat. Where did you get parts for them?

I believe they are a derivative of a 727 torqueflite........so most of the internals should interchange. Any information is appreciated.

Im also following this build because I have a somewhat similar set up in mine......598's, dart big chiefs, single dominator's, B&M 2 speeds, SSM #5's......unfortunately I do not know what cams are in the engines since I just bought the boat in April. Ill have to get off my butt and measure the valve events.....so far ive just sorted out the over richness of the carbs and will install a CB black boxes (only $200 and they interface between the distributor and MSD box) so I have computer control over timing.

Last edited by SS496; 06-04-2018 at 08:31 AM. Reason: added info