AAN head on 7a block?

[mbcouple]

I need a new block for my aan head. A local guy has a 7a block lying around. If i transfer the rotating assembly from the aan block to the 7a block, will the 7a bolt right up to the aan head? Are the oil ports missing for the turbo that will have to be tapped?
Thanks
Hans

[Doug_RS2]

7A is 82.5mm bore, AAN is 81mm - You will need at least new pistons and this is assuming the gaps between the cylinders are good enough for a turbo application.

Don't know about the oil squirters.

[mbcouple]

Thanks, its been a while since i worked with a 7a. What block out there can i use? I have a good rotating assembly, just a block beyond repair.
Thanks
Hans

[Doug_RS2]

I think you are limited to the AAN, ABY, ADU or the 3B (but the 3B needs mounting holes for the cam position sensor). There might be others - I am not sure though - some of the part gurus will know more.

[porkkis]

Errm. Ignore that cam position sensor stuff. It's in the head, not block.
3B block lacks the newer style cambelt tensioner holes so you would have to use 3B timing stuff (oil pump with static relay roller, water pump and timing belt covers).
And about the 82,5mm bore. I would never use it on a turbo engine.

[mcandmar]

Cant answer your question buy i tried to find somebody who had put a turbo head onto a 7A block and nobody has. Biggest problem is the Compression ratio due to different pistons, and the larger bore. You would have to get pistons made so it would be cheaper to buy a used 2.2 block and work from there.

Oil squirters are on the 7A block too. To the best of my knowlage turbo oil ways tap into the block the filter screws into, also feeds oil cooler etc which a 7A does not have, the oil filter screws directly onto the block on a 7A.

I need a new block for my aan head. A local guy has a 7a block lying around. If i transfer the rotating assembly from the aan block to the 7a block, will the 7a bolt right up to the aan head? Are the oil ports missing for the turbo that will have to be tapped?
Thanks
Hans

[mbcouple]

So is there a cheap block that i can use, or do i just have to bite the bullet and buy another complete aan block? They are expensive here in the US about $1000.
Thanks
Hans

[Doug_RS2]

Errm. Ignore that cam position sensor stuff. It's in the head, not block.

doh

[RSCoupe]

The 7A block can be used. I'm using the 7A block and head on my project. I will even bore the block to 83mm. Javad Shadzi here in the states has done this and the car is running fine (with exception of a mistake his machine shop made while assembling the head). He will be pushing 550-600hp.

Granted, he used stronger rods, custom pistons, copper head gasket, etc. Not much stock when all is said and done.

Mine will be very similar to his (different EM, IM, turbo). I am also shooting for 550-600hp. It is just taking a lot longer for me to do, but at least I can see from his project that mine should work.

[porkkis]

He will be pushing 550-600hp.

But not for long

[caterpillar]

in the germany they sell turbokit for the 7a's ! you may use any block you want.the only you have to do:the return of the turbo oil,you have to drill it up.it is marked on the block.if you want more than 380hp and 550NM,you need to change the rods,to H-profils ditto.......

[auditude]

But not for long

Does that mean he's going to crank it up for even more power, or that it's going to break before long? I could interpret that either way, or even both!

[auditude]

in the germany they sell turbokit for the 7a's ! you may use any block you want.the only you have to do:the return of the turbo oil,you have to drill it up.it is marked on the block.if you want more than 380hp and 550NM,you need to change the rods,to H-profils ditto.......

Does this company have a website? I'm curious about this offering.