speed rII

I know that the timing chains are different.

I'm just figuring out my options for building a "better" engine. And calculating the possible cost's for engine build.

Hp aim is some where near 100hp/liter so in this case 360hp.

I wan't the engine to have good low end torque, so that's why the larger displacement.

I'm in no rush with this one, and hope to hear some opinions how to achieve the hp goal.

Car must be N/A so no turbos etc. (registration problems)

Nyegaard

Maybe (and probably) a stupid question, but why not go for a fairly simple X51 upgrade to the 3,6 with possibly upped compression to get the last 15 or so hp out of it ?

speed rII

I think that I need new ecu and wiring harness for the X51?

How much would the X51 conversion cost? Like I said ,I'm open to suggestions.

Byprodriver

What do you have now? year ? model ?

speed rII

Oh,

1998 C2 manual. Engine that I have now in the car is in good condition, so that's why I have no rush with this one.
When I bought the car, I thought that I will drive it about 4-5years and trade to 997.
But now that I have drove with it about 10k miles in 8 months, I think that I will keep this.
Plans are to paint the car riviera blue and build more powerful engine for it.

Nyegaard

Honestly though, it sounds like you want another car. Not to rain on your plans or anything like that, but whenever I find myself thinking "if only it had X and Y was different and the engine was a Z" I can fairly quickly tell myself that I'm on the wrong track and need to change cars.

This goes for expensive things like new engines and colorchanges. Minorish mods are fine.

Just my 2 cents and all that.

ivangene

pretty sure the bolts "fit" but with the entire vario cam set up completely different, the cam held in place different, the scavenger pumps different, the chains, the lifters, the cradle, the cams and possible some other stuff I think the effort would be enormous - but I really dont know that...J.R. is the expert, call him

logray

If you want more power and can't go with a turbo I think a larger bore (example: http://www.lnengineering.com/boxster.html) or super charger (example: http://www.vf-engineering.com/kit_porsche_996.php) are going to be your best bets.

Of course the money you might spend on the above you might be better off selling your car and spending it towards a down payment on a turbo?

logray

Also I would think the gains you would find from the 3.6 over the 3.4 are going to be from displacement... not the top end... (although the variocam plus system certainly adds some spank over the standard 3.4 variocam system - that's just one of the hurdles in trying to make a mutant).

speed rII

logray, looking to keep the low end torque, and get better top end power. The supercharger has the same problems when tryingh to get the car thru inspection.

I have built several engines before, 200 to 700 hp. NA and turbo
So thats no problem for me to build this one.

Nyegaard, in any other country, you would be rigth We have this nice car tax system.
996.2 cars costs around 50k eur.... thats 70k usd... So now the plan of using 10k eur to 30k car seems better idea? Allso after the build, I know what the car is

Allso, I can sell the old engine after the new is ready. That will lower the total costs nicely.

Ivangene, thanks I did not remember the scavenge pumps. I think that the head gasgets are the same, so the oil passings for scavengepumps might be the same.
And making the adapter parts for chainsprockets is no problem.

And thank you for replys, I need to find out all the options and prices for those first

Byprodriver

Check my 3.2- 3.6 build underway thread in this forum

logray

For the 10k euros personally I would look at the 3.4L to 3.6L big bore conversion from a company such as LN engineering. Not only do you get more displacement, but you will bulletproof the cylinder block as well.

I've read a few posts where this upgrade, along with freshening up of components is worth 50-60hp over stock. So half way to your goal of 100 hp... perhaps if there is money left over camshafts and other bolt on's or ECU tuning could make up the difference?

speed rII

Thanks Byprodriver, I havent seen your 3,2 build before. I think that thats the best way to proceed.
If I may ask, how much did you spend on parts?
And did you get the blocks ready or did some machinist do the fitting for the sleeves?

logray, budget allso includes the paint job. So the engine should cost about 5 to 6k.

But the engine is the first priority, becouse the arctic silver that is on my car now is in good condition.
Plan is to build this engine next summer, so there is lots of time to figure out what to do

Or, I might get some banger for the winter and rebuild my old engine... desicions desicions...

logray

Speed rII, look at the link I sent to you earlier.... it describes the whole process. It's the same thing byprodriver did.

$4100 US dollars if you ship to them your cylinder block.

They send you the upgraded block back along with new pistons.

Here's the link again...

http://www.lnengineering.com/boxster.html

logray

There's also silsleeve by Autofarm in the UK.

http://www.autofarm.co.uk/engines/water_cooled/pricing

3.4 to 3.7L upgrade for 3000 euro plus another 1000 for 3.7 L pistons.