Messages

1

Swaps, Turbos, Buildups / Stroking + FI

« on: September 18, 2008, 07:07:10 PM »

Oh yeah m42 rods are better, I believe they e forged, wheras m44 are cast - part of the reason I was going to change it all up.

2

Swaps, Turbos, Buildups / Stroking + FI

« on: September 18, 2008, 07:04:04 PM »

I dont know if anyone has used this company before, but it seems they can build custom gaskets etc to your spec and bore etc.

http://store.nexternal.com/shared/StoreFront/default.asp?CS=vacmotors&StoreType=BtoC&Count1=443264186&Count2=360404610

Don't know if this is any help to you, I'm not sure about price, whether it is competitive or not but seems ok to me.

3

Swaps, Turbos, Buildups / Stroking + FI

« on: September 18, 2008, 07:21:28 AM »

Sorry, I'll go and do that now - I presume that the parts mentioned above will still fit and that I will just have to order from the US? I have no problem getting parts from abroad if they will work, so all suggestions were welcomed.

4

Swaps, Turbos, Buildups / Stroking + FI

« on: September 18, 2008, 05:09:37 AM »

Thanks for the info guys - I will sit and have a look at al those numbers today!

So just to clarify, the stock bore on the m44 is 85mm, so I could use the mm stuff if I wish (live in England so exchange rate is favourable atm) alongside the m47 crank?

If I decide to bore out to 86mm then m3 pistons will work? Are these the E36 or E30 ones? And is it euro or US spec you have used?
Finally, as you said above, stock m3 rods work with these pistons, would stock m44 ones work also? (with regards to length - I would get forged ones made)


With regards to CR as long as I can keep it to stock CR with forged internals that will be fine as I only want to run a low boost application anyway.

Thanks again guys!

5

Swaps, Turbos, Buildups / Stroking + FI

« on: September 17, 2008, 02:44:30 PM »

I have an m44 engine that I basically want to extract more power from, and have been looking into stroking it using the m47 crank etc.

What I am having trouble getting my head around is compression ration and piston heights etc, as I am not very sure about what is needed.

What I want to achieve is to increase the displacement of the engine, as in the long term i want to go FI with the project, and, please correct me if i'm wrong, a larger displacement should yield a better response from FI?

However I do not want to raise the compression ratio too high with this in mind, as I am planning on building the engine up with forged parts to replace the cast rubbish that lives in there atm, so dont want to find I have to take it apart again in a years time to replace with lower compression parts.

So, say I have the m47 crank 88mm stroke and a bore of say, 86 or 87mm, can I then use something like the MM pistons to lower the comp? Will this at least lower the cr to stock levels, so I can run a low boost application?

Or can I just use the m47 crank with low compression standard size pistons and rods? Will this fit? If so I can run higher boost when I go FI

Sorry for my complete lack of knowledge on this