Short Block Questions for a Blown Application
Apr 17, 2005 | 09:13 PM
#1
Short Block Questions for a Blown Application
Lets say someone was building a short block for a blown motor and had to use the stock crank and rods, what would you use parts wise. If you could choose any compression ratio, what would you pick?
Here is what I get:
Stock crank and main caps, ARP Studs
Stock Connecting Rods, ARP Bolts
Clevite 77 Bearings
JE Forged Pistons 9.0-1
How does that sound? what would you do?
Here is what I get:
Stock crank and main caps, ARP Studs
Stock Connecting Rods, ARP Bolts
Clevite 77 Bearings
JE Forged Pistons 9.0-1
How does that sound? what would you do?
Apr 17, 2005 | 09:23 PM
#2
Staging Lane
Joined: Sep 2004
Posts: 56
Likes: 0
From: Kalamazoo, MI
I am going with 10.2 compression.. I just ordered a SLP 402 High compression and then I got 70cc heads to bring the compression down to 10.2.. I am going to try 7-8 pounds of boost with my Radix.. I couldnt use any parts over after it dropped a valve.
Nelson says he can tune it to work so I am going to try it..
Nelson says he can tune it to work so I am going to try it..
Apr 17, 2005 | 09:24 PM
#3
What I actually do is this.
If you do pistons, then always do rods. There is no point in doing just one. I like a long rod motor setup for boost over a short rod. But thats just me. I see it as an opportunity for longevity and more power.
With out 370 motors, here is how I do it.
Mahle 4"stroke pistons.(-12cc)
Stock 6.0 crank.
Eagle H-beam rods, 6.3 length.(L19 bolts)
After proper decking of block, with a 72CC head, I get right around 9.1:1 compression.
This works out killer. Hope this helps. Its a good cost effective way to build a great motor that will handle lots of power.
Rick
If you do pistons, then always do rods. There is no point in doing just one. I like a long rod motor setup for boost over a short rod. But thats just me. I see it as an opportunity for longevity and more power.
With out 370 motors, here is how I do it.
Mahle 4"stroke pistons.(-12cc)
Stock 6.0 crank.
Eagle H-beam rods, 6.3 length.(L19 bolts)
After proper decking of block, with a 72CC head, I get right around 9.1:1 compression.
This works out killer. Hope this helps. Its a good cost effective way to build a great motor that will handle lots of power.
Rick
Apr 17, 2005 | 09:44 PM
#4
Originally Posted by Rick@Synergy
What I actually do is this.
If you do pistons, then always do rods. There is no point in doing just one. I like a long rod motor setup for boost over a short rod. But thats just me. I see it as an opportunity for longevity and more power.
With out 370 motors, here is how I do it.
Mahle 4"stroke pistons.(-12cc)
Stock 6.0 crank.
Eagle H-beam rods, 6.3 length.(L19 bolts)
After proper decking of block, with a 72CC head, I get right around 9.1:1 compression.
This works out killer. Hope this helps. Its a good cost effective way to build a great motor that will handle lots of power.
Rick
If you do pistons, then always do rods. There is no point in doing just one. I like a long rod motor setup for boost over a short rod. But thats just me. I see it as an opportunity for longevity and more power.
With out 370 motors, here is how I do it.
Mahle 4"stroke pistons.(-12cc)
Stock 6.0 crank.
Eagle H-beam rods, 6.3 length.(L19 bolts)
After proper decking of block, with a 72CC head, I get right around 9.1:1 compression.
This works out killer. Hope this helps. Its a good cost effective way to build a great motor that will handle lots of power.
Rick
Apr 17, 2005 | 09:45 PM
#5
Grippy~ How much boost are you lookin to run??? I would say you could go even lower with the CR. In my 4.8 I am going to be running like 8.1:1 - 8.5:1 CR and 14-16# of boost. JE makes a kick *** piston and some Eagle rods are the ****. You think you like your radix now. Just wait till you build the lower end 
Apr 17, 2005 | 10:05 PM
#6
12 Second Truck Club
Joined: Feb 2002
Posts: 5,575
Likes: 0
From: Sacramento, CA
Damn you Rick. Don't give out the secrets! I want everyone thinking I'm a Baller and building some Mega-Dollar race motor. LOL
The problem for Grippy is his blower can only produce so much CFM so going real low in CR is going to hurt more than help him. With the amount of CFM he can handle I wouldn't go any lower than 9:1 personally. Now if he had the capability to run 16+psi then sure it wouldn't be a bad idea but throttle response off boost will suffer a bit. Then again, with a Radix he is always in boost. LOL
The problem for Grippy is his blower can only produce so much CFM so going real low in CR is going to hurt more than help him. With the amount of CFM he can handle I wouldn't go any lower than 9:1 personally. Now if he had the capability to run 16+psi then sure it wouldn't be a bad idea but throttle response off boost will suffer a bit. Then again, with a Radix he is always in boost. LOL
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Apr 17, 2005 | 10:15 PM
#8
Originally Posted by F8L Z71
Damn you Rick. Don't give out the secrets! I want everyone thinking I'm a Baller and building some Mega-Dollar race motor. LOL
The problem for Grippy is his blower can only produce so much CFM so going real low in CR is going to hurt more than help him. With the amount of CFM he can handle I wouldn't go any lower than 9:1 personally. Now if he had the capability to run 16+psi then sure it wouldn't be a bad idea but throttle response off boost will suffer a bit. Then again, with a Radix he is always in boost. LOL
The problem for Grippy is his blower can only produce so much CFM so going real low in CR is going to hurt more than help him. With the amount of CFM he can handle I wouldn't go any lower than 9:1 personally. Now if he had the capability to run 16+psi then sure it wouldn't be a bad idea but throttle response off boost will suffer a bit. Then again, with a Radix he is always in boost. LOL
See thats the cool part now. You will notice i said 9.1:1 CR with 72cc heads. All he has to do is change the heads to get more. And he has the 5.3 heads, so there you go. problem solved if you want more.
Rick
Apr 17, 2005 | 10:17 PM
#10
Originally Posted by Rick@Synergy
Nope, just standard clean up.
Rick
Rick