Thoughts on this head/chamber work?

[Jhonno]

Thoughts on this chamber work?

Standard on the left, reworked on the right..

https://goo.gl/photos/K5U3Tpu4WAVXb18SA

[Jhonno]

stevieturbo said:

What's the engine from ?

very peculiar shape for an OEM chamber, it would make you wonder why it is that shape.

TVR AJP V8

The most powerful 4.5 AJP I know of had chamber work too, but no images of what was done.

[Jhonno]

PeterBurgess said:

I would be interested to see photos of the underhead area of the inlet valves for both the original and welded heads?


Peter

This..?

https://goo.gl/photos/mJmNCufiGT2VZmAR8

https://goo.gl/photos/vQoyDtmib7UWAfYu5

[Jhonno]

Inline__engine said:

i think it is a much better improvment

For what reasons?

Edited by Jhonno on Monday 14th August 08:08

[Jhonno]

227bhp said:

Looks a bit on the rough side, but does it perform? That is the question.

The engine isn't up and running yet..

[Jhonno]

Sorry, not been online..

The engine is being built as a turbo'd lump, interesting you make the American V8 connection, as that is their main line of work, they are doing this as a side for someone.

[Jhonno]

227bhp said:

It looks like the seats have been replaced with Trojan alloy.
This is another one of those tiresome forum guessing games isn't it....

??

I'm not trying to create any sort of guessing game, I'm currently building my own AJP (N/A), which I was going to get headwork done on it, and came across this, and wondered the benefits if any for such drastic chamber modification. The most powerful 4.5 AJP I know of, had some chamber work, but no images of what was done.

[Jhonno]

PeterBurgess said:

Hiya
I meant the valve underhead area which I suppose is the 'back of the valve', interested as the new mods might well need an exciting shape to make the flow go where it is intended.
I tend to agree with Mignon, what looks poor on the original chamber is unshrouded and offers good combustion chamber characteristics, more so than the modded one. The modded one would have to rely on very superior flow to beat the original one overall. Is there a problem with achievable CR that the chamber vol needs reducing with welding?
Peter

I don't know if they have had CR issues, the engine is 10.5:1 as standard.

[Jhonno]

227bhp said:

Jhonno said:

??

I'm not trying to create any sort of guessing game, I'm currently building my own AJP (N/A), which I was going to get headwork done on it, and came across this, and wondered the benefits if any for such drastic chamber modification. The most powerful 4.5 AJP I know of, had some chamber work, but no images of what was done.

Yet you have, you could have bundled all that into a properly worded question in the first place so instead of everyone asking questions, they could have been answering yours.

OK, apologies. I should have put more thought/info into the original post.

[Jhonno]

An interesting take on it "227bhp" thank you for your input..

They do have some flow diagrams showing extra flow with their new chamber shape (shown after I started this thread)..

I guess it will be a case of waiting and seeing what the end result is!

[Jhonno]

PeterBurgess said:

I knew that Eddie and Flo often spend time hand in hand in ports in a turbulent relationship but didn't know they dragged along 48 siblings.
I'll go and put my goat on
Peter

[Jhonno]

spitfire4v8 said:

This will be the turbo ajp being done by ICE at Silverstone, it's a project started about 10 years ago by the now defunct Autocraft, later RND? At least they were doing a similar project that never got finished. Looks like it could be another 10 years before it's finished again but if it's a job fitted in amongst other things that means they're generally busy, which is a good thing generally? There's a whole facebook page devoted to it but updates are few and far between.

Edited by spitfire4v8 on Tuesday 15th August 16:13

Yes, that is the one Joolz.. They seem to have been doing some recent work on it again.. I think it is a side project to help the owner out, hence the pace.

[Jhonno]

spitfire4v8 said:

I mapped the wilder 3.8 sp6 on the ICE engine dyno when we were running them in the the t350 racer, made decent power but I found more from my own 3.6 later on but at the time it was the best sp6 I'd mapped.
They do a lot of big american stuff so presumably they're borrowing lessons learned from that side of the business for the ajp8. Wish they'd get it finished though. Does Campbell still own the car (think the owner was called campbell anyway?)

Interesting..

I am guessing they are applying things across yes. I don't think it changed owners, just builder. He is a friend of ICE either way, which is why they picked up the mantle on it.