4 bolt main.. Can you convert a standard block??

[VSjunkie]

Hey all, does anyone know if you can convert a standard 5litre block to having 4 bolt main end. Going Hypo and need it strong.. or anyone got advice on other ways to make it stronger.

[Zuicider]

nope as the bolt holes are part of the casting of the block and as u only have 2 bolt mains there is no chance to add the extra holes

[Zuicider]

but u could weld on sum extra bits and heavily reinforce it but then u will create weak points in the cxast

[immortality]

i thought you could convert em. something else to consider would be the pavtek mains stud girdle.

[POVRTY]

um its worth looking into, as said above^^^^ i thought they could be converted.

[burnz]

you should allready have 4bolt main as i think it became standard from VN onward's,
crank girdles and webbing are available as per usual.
and yes you can at a cost convert to upto 6 bolt main.

http://www.comeracing.com/weblog/2006/03/09.html

[ScoHar]

Not sure about these, but we sell 350 Chev 4 Bolt mains conversion sets, which include 3 caps, 6 bolts and a drill bushing.

I have instructions on fitting them if you want me to put it up.

[VT-565]

nope as the bolt holes are part of the casting of the block and as u only have 2 bolt mains there is no chance to add the extra holes

lol

Do you honestly think they cast the threaded main bolt holes in the block? that is going to keep a smile on my face all day.

You can convert to 4 bolt mains quite easily, and it will go a long way to strengthen the bottom end.
Fitting a main girdle will strengthen it out of sight. Tying all the caps together, this prevents cap 'walk' under load, thus preserving your bearings.

[immortality]

Do you honestly think they cast the threaded main bolt holes in the block? that is going to keep a smile on my face all day.

You can convert to 4 bolt mains quite easily, and it will go a long way to strengthen the bottom end.
Fitting a main girdle will strengthen it out of sight. Tying all the caps together, this prevents cap 'walk' under load, thus preserving your bearings.

good to see there are some sinsible people out there sharing the correct info.

you should allready have 4bolt main as i think it became standard from VN onward's,
crank girdles and webbing are available as per usual.
and yes you can at a cost convert to upto 6 bolt main.

the only VN's that got 4 bolt mains as standard where the GRP A's and a few other selected models like the VP GTS. certainly not on a standard production model. don't think i've ever seen a holden V8 converted to 6 bolt mains as they generally bolt in from the side of the block and the bottom rails on the holden block don't extend that low unlike the LSx blocks

[Pub247]

lol @ some of the comments above yes they can be converted and it rather pricey compared to what you pay for a stud girble most good performance workshops can do the conversion

[Special-T.B.K]

Or you can get a Crate motor...

[Reaper]

Hey all, does anyone know if you can convert a standard 5litre block to having 4 bolt main end. Going Hypo and need it strong.. or anyone got advice on other ways to make it stronger.

Yes you can but there are other options such as girdles etc depending on what you are doing to the motor. Talk to your engine builder - they should be able to tell you what you need.

nope as the bolt holes are part of the casting of the block and as u only have 2 bolt mains there is no chance to add the extra holes

Wrong. There are many companies that do the conversion routinely. You clearly have nfi what you are talking about.

you should allready have 4bolt main as i think it became standard from VN onward's,

Once again Wrong. Except for a few, all Holden V8's are 2 bolt mains. There were 700 (or so) blocks that were factory 4 bolt mains. They were fitted to the VN Group A, VP GTS and VP Clubsport 5000i. The Holden from VR onwards had modified bores to take a stroker crank that was fitted to some HSV models. (The block was modified but the crank was only installed in a few).

Seriously - and this is a JC achievement, I have never seen so much mis-information concentrated in so few posts, so quickly.

Reaper

[delcowizzid]

talk to come racing they do them most engine builders can do them bit of machining to fit them need to mill the block where they sit drill the holes and line bore the block once they are on