944J

yep but im just trying to see if there is any reason to stick with a 944 engine instead of a ls1, it doesnt seem like it unless refresh951 has the recipe for $4000 550whp/wtq engine

https://rennlist.com/forums/944-turbo-and-turbo-s-forum/725447-refresh951-s-hybrid-ultra-stroker-build.html

Chris White

With enough money anything is possible!

Duke

+1 !
I would not want to go too crazy on the bore and stroke. Stuff get's more heavy, cylinder walls gets thinner, the load on the rods get higher etc.

All things being equal a 3.0l at 1.1 bar of boost should net the same power as a 3.2l at 1.0 bar so it's not that big of a differance.

If the quest is power it's probably a better route to keep the engine around 3.0l and look over the head and cams and build a turbo engine that make peak power at 7500 rpm or higher. Then you'll have some serious power!

Thom

Double post, sorry.

Thom

I suppose that increasing engine size on a 4 cylinder engine will necessarily increase the intensity of the vibrations it naturally creates. Both my stock 3.0 NA and 3.0T vibrate at idle more than my 2.5 used to - the difference is subtle, but definitely noticeable. NVH may not be a relevant factor on a racer, but it might be worth considering when building an engine for a road car. Obviously a V8 should be smoother

944J

perhaps its tuning or the cam isn't matched exactly to your mods?

Thom

Stock cams on all three engines. Try it out and see for yourself

OzJustin

Just a heads up for anyone interested. I see that one of JMG's 3.2L cars is for sale.
http://www.jmgarage.co.uk/CMS/index....sforsale/a1obc

At AUD$25 000 it looks to be a decent buy.

Paulyy

I would so have bought that if it was the same price and in melbourne.

OzJustin

I totally agree Paul. Importing it had crossed my mind but it wouldn't be so cheap once you factor in shipping and compliance costs...

That and I'm really not a fan of the colour (washed out blue) so would need a full respray $$

Paulyy

not a fan of the colour either. id buy it for the engine really. that's it

Penguinracer

As a community we seem to be obssessed with capacity increase to the detriment of advances in engine management, intake & head improvement and advances in turbo technology.
I'd rather see more people move to modern tech turbos, advanced standalone with sequential injection/ignition, a fix for the number 2 rod bearing issue (even if it means dry sumping) & extracting sizeable improvements from the normally aspirated 8 valve head & dumping the restrictive 951 version.
Tim's 2.7 litre 16 valve looks particularly interesting.

Paulyy

dry sump for street doesn't seem very practical IMO

Penguinracer

I'm going to have be creative to get my dry sump tank under the bonnet - but where there's a will there's a way!

Diver944

Yeah that's my old engine, but transplanted into a different Baltic Blue car. I'd have it back in a flash if I had the money to buy it, and even more money to install the extra bits mentioned in the ad.

I would definitely upgrade the brakes as well (don't want to get caught out with a floppy pedal at 90mph again )