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brenx · 08-31-2005, 19:49

- At least 4 of the pushrods can't handle 390-410lbs open. So I'm up for pushrods. They were slightly bent pushrods, you can see contact on the underneath of the roller rocker. I guess rr's don't like slapping around too much

- The bores I've cleaned them up, so I could see any problems. At this stage the jury is out on the bloke. I dare say I'll need a new block as this ones a tad rough in the bores. :( I'll have to get a machinist to take a look. I'm not really surprised as the engines been to hell and back to do some of the problems of the initial build I payed for.

I won't know what condition the rotating assembly is in tell next week.

crochunter · 08-31-2005, 20:01

why would they have to handle that much open pressure. In my xd they were set at 375 lbs open. And that was alot bigger cam than what you was running. Hey brenz did you get your new email about new forums. The old one had a few bugs. This is the new one. You will have to re regester bro.

http://xatoxh.6.forumer.com/

brenx · 08-31-2005, 20:08

Quote:

Originally Posted by crochunter

why would they have to handle that much open pressure. In my xd they were set at 375 lbs open. And that was alot bigger cam than what you was running. Hey brenz did you get your new email about new forums. The old one had a few bugs. This is the new one. You will have to re regester bro.

http://xatoxh.6.forumer.com/

Bigger spring pressure gave me better valve control. I used to run 335lbs open. It used to just float but not evough so you could hear it. It was enough that you could see the damage it was doing to the tops of the valves. Left them concave.

crochunter · 08-31-2005, 20:48

What sort of pushrods are you using. I find the manley ones to be good.

brenx · 08-31-2005, 20:51

Can't remember I bought them from speedpro 12mths ago. I know they are 60thou walled. Next ones are going to be 100thou walled.

Racer · 08-31-2005, 23:58

Crow is the place to go for custom pushrods

brenx · 09-01-2005, 00:31

I've been chatting to a engine builder and machinist this afternoon. I've described to him what I found. His exact words were "start from scratch, if you lucky the crank and rods will be usable". I'll show him the block anyway. As I want to know exactly why it failed like it did.

So far I have a few viable options but nothing is set in concrete till the sums are done. Can't see anything happening in the short term due to $. I'm getting some concreting done which is where the car will have to sleep for awhile.

TruBlu351 · 09-01-2005, 01:10

So is that a licence for a 408?

falcon coupe · 09-01-2005, 01:36

Who needs a 408 with what Aussiemart's mate just did :

Quote:

Since we are on the subject of after market alloy heads,,a guy i know just had hes chi headed 30 though 351 dynoed,,and it made 550hp and 470 ftpds on 98 octane with a very mild intake duration of 242 at 50 thou flat tappet cam.

xdclevo · 09-01-2005, 02:18

Quote:

Originally Posted by brenx

His exact words were "start from scratch, if you lucky the crank and rods will be usable". I'll show him the block anyway. As I want to know exactly why it failed like it did.

If your crank is good, and you go bigger cam/bigger revs, a good option would be a set of H-beams to handle the abuse. Seems the 4MA cranks are bullet proof, and add the H-beams and you'll be revving with peace of mine. Forget the stroker.(

this is my plans after chrissy)