Engine damage

[Jaff.]

Syringe it is then

 

[RenMatt]

So your thinking of skimming the head again & raising the compression on a turbo charged car even more . Not a good idea

 

[Jaff.]

I understand it's not ideal but it's not the end if the world. I'd be taking hardly anything off.

i don't really see another option unless I learn how to s**t money tbh

 

[George182]

Gutted for you mate

 

[Jaff.]

It seems engines just aren't my thing.

 

[Dan@SJM]

So your thinking of skimming the head again & raising the compression on a turbo charged car even more . Not a good idea

You can run a turbo car on almost stock compression. It's all in the mapping, whether it survives or not.

 

[Chip-mk1]

You can run a turbo car on almost stock compression. It's all in the mapping, whether it survives or not.

While thats true, it also of course depends on manifold design and how much power you are going for etc, if you end up with too much ignition r****d to avoid det that you'll have to run it so rich to keep it cool that power starts to drop off, so ultimately there is a limit of how far you can go on any combination of fuel and CR.

(I know you know this, but just wanted to expand on your reply for those who dont)

 

[Dan@SJM]

While thats true, it also of course depends on manifold design and how much power you are going for etc, if you end up with too much ignition r****d to avoid det that you'll have to run it so rich to keep it cool that power starts to drop off, so ultimately there is a limit of how far you can go on any combination of fuel and CR.

(I know you know this, but just wanted to expand on your reply for those who dont)

Very true, I was particularly aiming at Jaff's setup, we know he's not going for massive numbers.

 

[Jaff.]

Depends what you call big power?

 

[Chip-mk1]

past 300 really for this sort of thing

 

[Ianboom]

Reminds me of the pistons I've taken out of my 2 stroke 350LC over the years, got one in the garage just like it!

Looks like detonation to me too.

On a bike it would be fuel starvation, too advanced ignition or too much compression.

 

[Jaff.]

past 300 really for this sort of thing

300 is the target figure ish....

and theres a teson I've done the vag box conversion and stuff too.

 

[Chip-mk1]

For 300 you could do it reliably really easy with an F4R

 

[Jaff.]

And the f7 is less reliable because?

 

[Dan@SJM]

It's cooling galleries etc are crap.

 

[Chip-mk1]

And the f7 is less reliable because?

Head gasket problems related to cooling system issues normally.

 

[Jaff.]

but tis still capable or a relatively reliable 300