Going to Build 470 Street/Strip Engine for 71 Demon

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J.V

J.V

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May 19, 2016
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Hey, Greetings from Finland!
Im going to Build 470 for my 71 Demon Street & Strip car. My current plans for engine is:

-77 Year 400 block bored to 4.375 and decked to 9.975 deck height. Aluminium main caps.
-Molnar 3.900 stroker Crank.
-Molnar 6.700 BBC rods.
-Diamond Pistons 1.32 CH with -12cc Dish.
-Trickflow 240 heads with 1.6 Harland Sharp Roller Rockers.
-Weiand tunnel ram intake.
-Mechanical Roller cam?

Does this setup sound good for you?
 
Looks like you're using high quality components! The tunnel ram, carbs, and cam are the tough part. I have no experience there. Maybe someone will chime in to give you some direction. 65'
 
J.V said:
Hey, Greetings from Finland!
Im going to Build 470 for my 71 Demon Street & Strip car. My current plans for engine is:

-77 Year 400 block bored to 4.375 and decked to 9.975 deck height. Aluminium main caps.
-Molnar 3.900 stroker Crank.
-Molnar 6.700 BBC rods.
-Diamond Pistons 1.32 CH with -12cc Dish.
-Trickflow 240 heads with 1.6 Harland Sharp Roller Rockers.
-Weiand tunnel ram intake.
-Mechanical Roller cam?

Does this setup sound good for you?
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Why not Trick Flow 270's? It looks like you are going to rev that baby up. I would talk to Dwayne Porter for the heads and cam, Wilson for the Intake porting and Mike at B3 racing for the rocker arm set up. The 3 of these folks can do some amazing things to parts and help you zero in on the combination.

MPFI would be sweet too, with either Holley HP or Dominator system depending on how many features you are going to run. Add a stout overdrive transmission with the right high stall, lock-up torque converter and it would really make the car a true street strip machine.
 
I was looking for 270s but i quess there are not many options for intakes for lowdeck with Max wedge port size? I know, Indy makes singleplanes but is there any tunnel rams? I assume that custom cam would be great choice specially with tunnel ram?

Drivetrain will be 727 transmission with reverse manual valvebody etc. + Dana 60 rear.
 
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That engine sounds great! I ordered Molnar 3.9 stoke crank and 6.7 length rods from Cambell Enterprises today. I have to get my block to machinist to make bores clean before i order pistons to make sure what size pistons i can use and finish bore after i get pistons.
 
Can you recommend any list cams for me or should i ask custom grinds right away? Im looking for 10 sec times in 1/4 mile with full interior car in full street wear.
 
J.V said:
Can you recommend any list cams for me or should i ask custom grinds right away? Im looking for 10 sec times in 1/4 mile with full interior car in full street wear.
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JV, what I would do is start a new thread titled what cam do I select and state your engine block and goals. You will be amazed at the feeding frenzy of responses you will get! Hah! Seriously that question is almost as good as how do I degree my cam. The opinions are a bit varied with many folks illustrating their personal bias but you will get some seriously good suggestions. And a wealth of info from some very knowledgeable folks.
 
J.V said:
I was looking for 270s but i quess there are not many options for intakes for lowdeck with Max wedge port size? I know, Indy makes singleplanes but is there any tunnel rams? I assume that custom cam would be great choice specially with tunnel ram?

Drivetrain will be 727 transmission with reverse manual valvebody etc. + Dana 60 rear.
Click to expand...
Indy's tunnel ram manifold for the 400 B-engine will go out to Max Wedge size. Part #400-14-15. The carburetor top is extra and available for 2x4150s or 2x4500s.
 
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Rear gear ratio and tire size and converter will be questions that the person who will be talking too about a cam is going to ask you, my vote is for PRH Dwayne Porter he's a member on here and also the 1 who picked mine post #6
 
Nearly exactly the same engine I'm in process of building except compression ratio & the tunnel ram since ill be building my own, the 240's will do you fine. Andy F built exactly what you & I and many have built he pulled 750 horses out of his & maybe got another 35-45 horsepower with the 270's.
 
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