304 Roller cam blocks prefix

[vndetta]

G'day everyone, can anybody tell me if any of the VS 304/355 efi's were roller's? I've been looking for detailed specs on the VU*** engine number prefix but I've only found that it's from VN-VS models. I found a couple of blocks that are factory relieved for stroker cranks and also have higher than standard lifter bores with VU*** engine number prefix. Any info would be great.

 

[GM001]

Some VS series 3's had the roller motor, mainly utes and caprice. All blocks VR series 2 on wards are stroker relived, which prefix is VU, the roller motor prefix is VM or VN. to my knowledge no VU prefix blocks had high lifter bores to accommodate for the roller block.

 

[383 hatch]

All VS series 3's were roller blocks, Essentially, they're VT engines. VS series 3 was only ute and statesman.

 

[greenfoam]

Well in theory, but I've done tunes for heaps of "Series 3's" so the owners claim but they never seem to have the maf ecu. Unless they are map based and just use the roller block and cam without the rest of the VT setup

 

[383 hatch]

I would say they aren't really series 3's....Series 3 ran a MAF, same as VT.

 

[vndetta]

Some VS series 3's had the roller motor, mainly utes and caprice. All blocks VR series 2 on wards are stroker relived, which prefix is VU, the roller motor prefix is VM or VN. to my knowledge no VU prefix blocks had high lifter bores to accommodate for the roller block.

Thanks for that info GM001.:beer chug:

 

[vndetta]

So does anybody know what the height differnce is on the lifter bores between the roller block and the flat tappet blocks? I've seen some earlier efi blocks and the lifter bores are quite low with almost nothing raised of the cam tunnel casting. But the VU66**** prefix block I seen, the lifter bores were raised roughly 1" above the cam tunnel casting. Does this not indicate the block as a roller? Or is it just an upgrade in the casting of the later blocks along with the stroker relief?

 

[vndetta]

http://s774.photobucket.com/albums/yy25/vndetta79/auto/?action=view&current=VSBlockVUprefix01.jpg
Here are 2 pics of the block with the VU66**** prefix. It looks like a roller block to me. Whatdo you guys reckon

 

[vyjess]

well the lifter bores look alot higher than a normal block to me! holden being holden they probly started making and using roller blocks b4 they had roller cam engines!

 

[greenfoam]

Looks different but the roller blocks have mounting holes in the centre too