427 Iron Block
427 Iron Block Has anybody ever done a 427 out of a 6.0L? 4.060 bore 4.125 in stroke. Besides the obvious advantage of having the iron block for added strength...are there any other advantages or disadvantages?
I've seen it done once and from what I understand you can only do it with pre-04 blocks...something about them being able to go farther than the later years.
I'd like to personally know...I've yet to hear of anyone taking a 6.0L to that many cubes.
I'd like to personally know...I've yet to hear of anyone taking a 6.0L to that many cubes.
Advantages: Displacement
Disadvantages: (long list)
1. You need to sonic test the block to see if it can even be honed that far.
2. If you nick the walls the block is trashed
3. You'll need custom pistons
4. Oil consumption should be taken into account as iron blocks have some of the shortest sleeves of Gen III and IV engines
5. Ring packages and compression height start to get closer and smaller
6. You'll have to clearance a lot of things in the block
7. 4.125 stroke cranks and custom pistons are expensive.
Tips: I'd use a L92 or LS2 block . I really want to build a 4.125 stroke engine and have done a lot of research on it.
Ideally here's what I'd do:
L92 block
Callies 4.125 crank
Callies 6.200 rods
Custom pistons (Call the company and talk with a tech about what you're goals are and they will help you out. I'd suggest JE Pistons. They're the only people out of Diamond, Ross, Mahle, and themselves that actually answered the phone. All the others made me leave my number and never called me back. Alex in tech helped me out immeasurably.)
Disadvantages: (long list)
1. You need to sonic test the block to see if it can even be honed that far.
2. If you nick the walls the block is trashed
3. You'll need custom pistons
4. Oil consumption should be taken into account as iron blocks have some of the shortest sleeves of Gen III and IV engines
5. Ring packages and compression height start to get closer and smaller
6. You'll have to clearance a lot of things in the block
7. 4.125 stroke cranks and custom pistons are expensive.
Tips: I'd use a L92 or LS2 block . I really want to build a 4.125 stroke engine and have done a lot of research on it.
Ideally here's what I'd do:
L92 block
Callies 4.125 crank
Callies 6.200 rods
Custom pistons (Call the company and talk with a tech about what you're goals are and they will help you out. I'd suggest JE Pistons. They're the only people out of Diamond, Ross, Mahle, and themselves that actually answered the phone. All the others made me leave my number and never called me back. Alex in tech helped me out immeasurably.)
427 LQ9 block I will keep you posted. My lq9 block spun a rod bearing with the stock 364 cubes. I am not sure why, but it had less than 250 miles on it, since it was rebuilt. I also have the l92 heads and l76 intake.
I decided to go with a stroker set up using 4.06 pistons and a 4.125 Crank. A local engine builder is setting me up with a set that was pulled from a motor he was boosting. My Lq9 block is a 2002.
The machine shop should get the bore finished this week. Then I will hopefully get it back into my C4 this weekend or next weekend at the latest.
I decided to go with a stroker set up using 4.06 pistons and a 4.125 Crank. A local engine builder is setting me up with a set that was pulled from a motor he was boosting. My Lq9 block is a 2002.
The machine shop should get the bore finished this week. Then I will hopefully get it back into my C4 this weekend or next weekend at the latest.
