38 replies to this topic

[naughtyboydan]

The conrods are the same and what do you mean droped i know the valvs have hit piston 4 and 1

[Sam Walters]

Personally i would be buying new pistons with the state those are in and get the block decked to suit the new ones.

[naughtyboydan]

I wanted to avoid decking the block but wouldnt mind changing the pistons dose any body know if any body has any 73.5 pistons lying around for sale that would be the best bet. Some thing that would handle the supercharger.
Plus what other chargers can you use other than the M45 ?

[naughtyboydan]

Dose any one know where i can get h head welded. I have a crack in one of the ports and need it fixed. Its a stage 5 would rather get it fixed then get a nother one. Any help would be grand. Thanks.

[Sam Walters]

I wanted to avoid decking the block

Why?

[mini13]

those pistons are a LONG way down the bore, there must be somthing odd going on for them to be that far down, probably they are short pistons for a stroker, with them that far down you won't have any squish so combustion and therefore power will suffer.

where is the port cracked? i'd say the best thing would be to get it brazed and get them to preheat it and let it cool SLOWLY!

[naughtyboydan]

Because the head has a little crack in it

[Sam Walters]

Because the head has a little crack in it

So this stops you decking the block how?

[DEVILBOY13]

hi
we have just got our 1293 supercharged engine running on the rolling road 120 bhp
it is running HIF carb
we are now making the supercharger manifold set up to work with eaton supercharger
Nigel at FENTON MOTORSPORT did all the tuning and needle set up on the engine.

[AndyMiniMad.]

Cracked head...Dodgy looking pistons...And a super charger dont add up to a reliable engine.Your choice to continue with what you have of course...But my advice would be to start again...

[naughtyboydan]

Yes i agree i have finaley desided agenst the pistons i am getting new ones. I am getting 11cc omega pistons so hopefully i might not have to use a decompretion plate i would like to avoid it. As for the head its only a tiny tiny crack and if i can find it would rather fix it because its a stage 4-5 turbo head. A friend recomended pulling the vack addvance off the dizzy and setting it to 20 degrees should be fine to start with before buying a meajolt.

[Sam Walters]

Ive never heard of a forced induction bias head be labled as a stage 4 head. I suspects its an N/A head with huge ports and small chambers. Take some photos for us.

[naughtyboydan]

The head came off my friends 1293 turbo. I believe it came off a turbo auto grass will get some picks ASAP.

[AndyMiniMad.]

I would add that a tiny tiny crack that you can see when the head is cold can become a big big crack when the engine is hot. I had a fairly valuable old cooper head that had beed well worked..found a tiny crack!! its now a very expensive door stop!!

Here is a pic of the crack..if your crack is like this then the head is toast!!

Edited by AndyMiniMad., 08 August 2012 - 08:22 AM.

[naughtyboydan]

I think the crack is in one of the ports i belive. My friend told me you jave to get the head baked and then welded. Has no one herd of this being done.