Can Anyone..

[Bob Tucker]

We've lost all compression on cylinders 5 & 7....????

[Guest shane1664]

Dad says check the timing

[Guest TerryBarry]

That looks like a really nasty bit of erosion to me

[Guest warwick7735]

Hi

A spot of chewing gum should do the trick

 

Warwick

[Guest micky bigthumbs]

possibly the wheels going faster than the engine ......or to much nos making the fuel a bit rich

[Bob Tucker]

Think this could be part of the reason too....sorry it's fuzzy....

[Guest timswait]

Well, if it's only nos 5&7, surely you've got enough cylinders left to satisfy anyone. 8 cylinders is just greedy methinks

[Guest Stuart Ainslie]

Is it going to be up and ready for the Main Event then Bob ? ?

 

Brendan (SG186) blew his gearbox at the Easter Thunderball but by divine intervention managed to make it to the Shakespeare Nationals...

[Guest paul mercer]

Bob,

 

I don't see there being a problem. Use a thicker head gasket, that may work. hmmmmm.

 

Paul

[Guest salty_monk]

You're probably just speaking to it with the wrong accent! I have that problem a lot over here, it doesn't understand what you want it to do

[Guest docter fox]

do you normally get much compression with the head off?

[Bob Tucker]

Guys,

The last run (when the damage occured at about 1000 feet) was a 9.51 159 mph...with just 6 cylinders....so theres still plenty more to come.

It looks like the blower coughed back & caused a temporary 45psi of boost (should be max 11) & the burst panel should let have go at 25, but it didnt. Only possible causes for it to cough are weak mixture or wrong timing, so they'll be checked & re-checked after the rebuild.

 

The head is being repaired locally, & we're honing the bores ourselves, but new pistons, rings & big end shells (& a thicker head gasket!!) are coming from the US, but there is a 2 week delay while the piston supplier builds 2000 identical Pro-Stock pistons, before he tools up for our pistons.

 

Our next event is on 17th & 18th June, which we should make.

I'll post up whether we're ready or not a few days before.

Cheers, Bob