Will 4AGZE rods and pistons work in a 4AGE?

[Greengoose]

I have new Carrillo rods and new Venolia pistons I was going to use for a 4AGZE but I'm now rebuilding a NA 4AGE instead, and would like to use them even though they are overkill. Is it possible to use these for my NA?

The Carrillo rod specs are:

Center to Center: 4.803
P.E. Bore: 0.7884
B.E. Bore: 1.7720
P.E. Thks: 0.860
P.E. Thks: 0.858

The New Venolia pistons specs are:

Piston Bore: 3.228
Pin: .787

Any help would be greatly appreciated!!

[q-authority]

Depends upon what year your 4AGE is and what compression the Venolias are.

I believe the 87-89 4AG(Z)E had a larger connecting rod journal than the 85-86 models and the Carrillo rods would need to match whichever you have. The specs you listed show you have the larger connecting rods, so I hope you have a late model 4AGE.

What compression are your new pistons. Normally one would have gotten low compression pistons for a 4AGZE, and if that is the case then they probably wouldn't be the right match for the 4AGE unless you were planning to go turbo. Shaving enough off the head to make the compression ratio higher would probably only cause other issues.

No reason that the tougher rods and pistons can't be used otherwise, as they'll just be a bit more sturdy than normal and take more abuse, so you might as well add cams, etc. if the parts all match up right.

[jayjayjayjay]

Originally Posted by Greengoose

I have new Carrillo rods and new Venolia pistons I was going to use for a 4AGZE but I'm now rebuilding a NA 4AGE instead, and would like to use them even though they are overkill. Is it possible to use these for my NA?

The Carrillo rod specs are:

Center to Center: 4.803
P.E. Bore: 0.7884
B.E. Bore: 1.7720
P.E. Thks: 0.860
P.E. Thks: 0.858

The New Venolia pistons specs are:

Piston Bore: 3.228
Pin: .787

Any help would be greatly appreciated!!

Greengoose, I read this after searching google for carrillo rods available for 4age. First is what have you decided to do re the NA build. I saw another post of yours were your changing to "Weisco or Arias for new pistons". Either is my answer. I assume you are going to use the Carrillo rods? Anyway, my question is why you would not be using the 4agze block as your base for NA. The removal of the superchargers is easy and wise. The 4agze block and crank are stronger thus will provide a better base than the earlier NA blocks. That is unless you already have a small port NA block, which would have been build between 89-91. This block has 7 ribs and a silver cam cover with red writing (only red, not red and black). If your going the 20V route then these plenty of blocks available, but they are still not as good as the 16V when finished (just see Formula Atlantic builds).. Anyway, unfortuneately you dont have the carrillo's for sale, never mind, love to see how your build goes. PS this is my first post, as Im a AE86 owner,,,,,, drifting my heart away,,, cheers, JayJay

[jayjayjayjay]

Originally Posted by Greengoose

I have new Carrillo rods and new Venolia pistons I was going to use for a 4AGZE but I'm now rebuilding a NA 4AGE instead, and would like to use them even though they are overkill. Is it possible to use these for my NA?

The Carrillo rod specs are:

Center to Center: 4.803
P.E. Bore: 0.7884
B.E. Bore: 1.7720
P.E. Thks: 0.860
P.E. Thks: 0.858

The New Venolia pistons specs are:

Piston Bore: 3.228
Pin: .787

Any help would be greatly appreciated!!

Greengoose, I read this after searching google for carrillo rods available for 4age. First is what have you decided to do re the NA build. I saw another post of yours were your changing to "Weisco or Arias for new pistons". Either is my answer. I assume you are going to use the Carrillo rods? Anyway, my question is why you would not be using the 4agze block as your base for NA. The removal of the superchargers is easy and wise. The 4agze block and crank are stronger thus will provide a better base than the earlier NA blocks. That is unless you already have a small port NA block, which would have been build between 89-91. This block has 7 ribs and a silver cam cover with red writing (only red, not red and black). If your going the 20V route then these plenty of blocks available, but they are still not as good as the 16V when finished (just see Formula Atlantic builds).. Anyway, unfortunately you don't have the carrillo's for sale, never mind, love to see how your build goes. PS this is my first post, as Im a AE86 owner,,,,,, drifting my heart away,,, cheers, JayJay

[toyotaspeed90]

4agze block is the same as the n/a block.... crank is the same as well.... this is *year for year*. The n/a block to the pre 87's was weaker and the crank was smaller -- not sure I would use the term "weaker" for the early crank.

only difference is that the gze block in the US had oil squirters whereas the 87-89's only had the ability to install them (just not installed). All 90+ 16V's have squirters in them, however.

As for whether or not the rods will work depends on what crank you plan to use. If you already have aftermarket rods and pistons, I would assume you've done your homework for ensuring you have the rods that match the crank you will use (stock or not). All 4a rods are the same length, so that shouldn't be an issue.

[mhamrick]

Oil squirters??? Umm they did not have oil squirters. No USDM GZE block ever had oil squirters unless someone swapped a later model block for the GZE block. I will tell you how you can tell is that the USDM GZE pistons do not have the cut out for the nozzle in the piston skirt. Now the rods actually have a dimple that will help lube the piston wall but no squirters. The squirters are more to cool the piston down and it is a little nozzle that points up the cylinder bore.

All rods have the same center to center length BUT some have the smaller rod journals. So you would not be able to use just any rod. You will have to match rod journal size (I think this is what you meant but it came out wrong).

You can essentially use any block as the cranks are all the same spec to fit the block. However the rod journals are the only part that is specific as are the rods that match. All the crank bearings are the same spec no matter what year or model (they do have different sizing and you have to read the marks on the bottom of the crank to be sure you get the proper set).

If you bought the Venoila pistons for a GZE are they not lo compression? If so then you will be hurting your hp and response by using them in NA form. If the motor you are thinking about dropping these in is a 3 rib then don't. The 7 rib is built for the extra abuse and most likely the 3 rib block has the small internals.

Hope this helps you out.....................

[Capt.Evergreen]

So go turbo or add stock sc... With that setup u will need the boost....
Capt. EverGreen