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Building a blown RB?

Posted By: fed

Building a blown RB? - 10/23/13 08:52 PM

I would like to build a low maintance blown engine.
It will be on alky. A 6-71 with twin toilets.
Any tips to make it live.
Will be in my Fed or Bantam.
Maybee 800 to 850 HP.

Attached picture 7897880-Zikenhjullyft.jpg
Posted By: JohnRR

Re: Building a blown RB? - 10/23/13 09:15 PM

Quote:

I would like to build a low maintenance blown engine.




can you use that Low Maintenance and blown engine in the same sentence ???

Do you have an aftermarket block ? First order of business for that HP level ...
Posted By: fed

Re: Building a blown RB? - 10/23/13 09:35 PM

No aftermarket block. I have both RB and B blocks.
Running a 498 with 720 dynoHP in the Fed, works like a charm!
Setting the valves and one oilchange every season.
Posted By: Dragula

Re: Building a blown RB? - 10/23/13 09:56 PM

Quote:

No aftermarket block. I have both RB and B blocks.
Running a 498 with 720 dynoHP in the Fed, works like a charm!
Setting the valves and one oilchange every season.



I second the motion on the after market block...But at only 700hp, we make more than that on pump gas with a NA RB at 512 cubes...I would do a low deck 400 with a girdle and -500 cubes...Should make a ton of HP, problem being, the 6-71, so a non-stroked RB would be the ticket if your only using a 6-71...Is it a high end 6-71, or a plain jane one?

Friend of mine runs 4.70 with a blown RB in a Dart like a bracket car...but not with a 6-71....
Posted By: fed

Re: Building a blown RB? - 10/23/13 10:58 PM

Plain Jane typ!
Posted By: Defbob

Re: Building a blown RB? - 10/24/13 12:19 AM

Keep the motor under 450ci with the 6-71. To free up horsepower without cranking up the boost, get some ported conventional heads like Stealth, Edelbrock, etc. Use a mild cam like a Mopar 528 mechanical. locked distributor at 25deg, 8lbs boost and you'll be at 700hp with zero maintenance.
Posted By: Jerry

Re: Building a blown RB? - 10/24/13 12:40 AM

use the best parts you can afford, forged pistons are a must. I highly recommend our main cap and girdle kits to ward off cap walk and completely strengthen the bottom end. after that good rods are a must, I personally like H beam rods in that application.
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