J_ones's Porsche 951 with AAN

[J_ones]

Hi all!

After some troubles with my previous engine, original 951's, I decided to move up something little bit more reliable. I bought full AAN engine with ECU and clutch plate. It has done over 300 thousand km, but that wasn't a problem 'cause I was going to open it anyway.

So, now I have this setup:
- Supertech pistons, 81.5mm
- Rosten Performance rods
- Rosten Performance springs
- Rosten Performance camgear
- Garrett GT30R
- Tial wastegate
- Furans exhaust manifold
- 044 pump
- VEMS
- 993 GT2 Clutch
- and some other stuff

Still need to be bought:
- Injectors
- 7A camshaft
- and some other stuff

Had the head done, nothing big. Also crankshaft balanced, block bored to pistons measurments.





The block got new black paint on it last weekend. Also I got bearings and gaskets so it's going to be rebuilding time ahead.

I'm asking now about the Rosten springs: Along those springs came plates that replaces the original plates (don't know what they're called, plates come under springs, in pic above the springs). Should I use the originals or the Rosten ones?

Then, should I use ARP main studs or will the original studs do the job?

Feel free to comment. It's been a while since I talk/wrote english propely so sorry if there's something what can't be understood

It's not so plug and play to put a AAN engine to a Porsche, so http://9products.com/ came to help me. Machining works, mainly the cluthing bell, is done by 9P.

[s4boy]

very very nice keep the updates coming.....mark

[Bram]

cool project. any pics of the Porker?

[J_ones]

Sure,

[prj]

Original should be fine on a 30R.

[J_ones]

Hmm, haven't decided yet how long I'm gonna use the 30R. I was hoping that when I get all test and tunes done I'd change the turbo a bit bigger. This is just planning but I don't want to live on the edge That's why I put already a bit better parts in it.

[prj]

Well, then fit ARP's.

P.S.
Make sure you deck the block and skim the head if you are going for a bigger size turbo, or you will lift your head regardless of ARP bolts.

[quattro84]

Nice car, looks like the one which was on sale in Sweden some time ago, had a 700+ hp 5 pot engine http://forums.rennlist.com/rennforum...4-project.html

[Jamo]

Nice car, looks like the one which was on sale in Sweden some time ago, had a 700+ hp 5 pot engine http://forums.rennlist.com/rennforum...4-project.html

There was a car that featured in pratical performance car, it was awesome

I'll dig out the cover

[J_ones]

Also a question about lifters. I cleaned them and noticed that 5 of them were obviously broken, they just clacked while I turned them up and down. Others had significantly different pressure.

So, should I buy originals or lightweight versions?

[Jamo]

There's a difference of opinions on the lightweight lifters http://www.s2forum.com/forum/showthread.php?t=34385 Post 26 onwards is an intereting read

[J_ones]

Nice thread, thanks. I tried to reach Repo today but no luck. Maybe later this week, I also ask about the Rosten springplates I mentioned earlier.

My goal is +500hp, not a miracle with 30R? More is better but we'll see that later. The car is going to be almost-daily-driver not so HC-track machine.

[Thuppu]

Nice to see this project here, welcome. What I have heard the lightweight lifters have problems with deformations in hard stress.

[J_ones]

Yea I thought that this could be interesting project among all the Audis here

I decided to buy OEM ones, if this guy http://forums.rennlist.com/rennforum...4-project.html uses also original, I don't think there is any reason to use lightweight.

[alxdgr8]

Definitely watching this thread! I plan on doing the same thing when I get tired of/break the 951 engine. Good to see 9P will have some stuff ready for me when I decide to make the move!