Hey Highboy 74...
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Posting Guru
Joined: Aug 2001
Posts: 2,117
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From: Evanston, WY
Hey Highboy 74...
I tried to respond to your PM but your mailbox was full.
I'll answer here, that way everybody can benefit if they have and interest.
I would go with the Shelby block again, if I were to do it over. I like the features:
1. Long head studs that pull from the base of the cylinders.
2. Revised oiling system.
3. Replaceable dry sleeves.
4. Big bore sleeves.
I went with the 4.375 bore, which can be bored to 4.44. So there are at least two overbores left in the sleeves, maybe more if you don't go to .030 each time.
For a big cube truck engine, I would recommend the following as a base:
Shelby block at 4.375
Crank at 4.375
BBC rods ( I think you can still do 6.7")
KC Stage II heads
Blue Thunder dual plane manifold
Solid flat tappet cam at around 236-242 duration.
This would give MONSTER torque, and still make HP up in the RPM range.
The only problems with exotics like this is the price. The engine I just listed is gonna run around $12,000 as a minimum, and then go up from there if you use top-notch parts.
-Scouder
I'll answer here, that way everybody can benefit if they have and interest.
I would go with the Shelby block again, if I were to do it over. I like the features:
1. Long head studs that pull from the base of the cylinders.
2. Revised oiling system.
3. Replaceable dry sleeves.
4. Big bore sleeves.
I went with the 4.375 bore, which can be bored to 4.44. So there are at least two overbores left in the sleeves, maybe more if you don't go to .030 each time.
For a big cube truck engine, I would recommend the following as a base:
Shelby block at 4.375
Crank at 4.375
BBC rods ( I think you can still do 6.7")
KC Stage II heads
Blue Thunder dual plane manifold
Solid flat tappet cam at around 236-242 duration.
This would give MONSTER torque, and still make HP up in the RPM range.
The only problems with exotics like this is the price. The engine I just listed is gonna run around $12,000 as a minimum, and then go up from there if you use top-notch parts.
-Scouder
Senior User
Joined: Nov 2003
Posts: 495
Likes: 0
From: WA
What do you think of the steel blocks? The only reason i was thinking of going with the Genesis steel block was because of the price. I can save a thousand dollars by going that route. However I don't think I can bore it to 4.375, if thats the case I will probably go with the shelby block. Is a 4.5" stroke too severe for a block like this? Will it cause a bad piston to rod ratio? I see you run nitrous on your engine. What special engine components are required in order to run nitrous? What kind of power are you making?
Thanks for the replies.
Thanks for the replies.
Lead Driver
Joined: Apr 2001
Posts: 6,175
Likes: 21
From: Texas
what's $1000 extra on the block if you're going to spend $5000 on the rotating assembly, and probably another $5000 on the top end....Might as well go Aluminum and get the weight savings in that price range.
I love these FE motors, but if you realy want that much displacement on a budget, look at one of the 460 stroker setups.
I love these FE motors, but if you realy want that much displacement on a budget, look at one of the 460 stroker setups.
