Originally Posted by TunerToys

In the D series realm, the A6 is the block of choice. Most of the racer/engine builder I have dealt with all choose the A6 over all others. As for your choice of components, be very careful about the Compression Ratios you get with the Vitaras, we are running an A6/Y8/TTrod/Vitara combo, and there is very little power in the low RPMs because of the low CR.

Originally Posted by Minor Threat

Give me the money to buy one.

Originally Posted by TunerToys

In the D series realm, the A6 is the block of choice. Most of the racer/engine builder I have dealt with all choose the A6 over all others. As for your choice of components, be very careful about the Compression Ratios you get with the Vitaras, we are running an A6/Y8/TTrod/Vitara combo, and there is very little power in the low RPMs because of the low CR. It screams above 3500RPM, but is dog slow at the lower RPMs. If I had it to do again, I'd make sure the CR was higher. I believe after all the calculation, that our combo ended up at 8.5:1, which is fun only if you are running high levels of boost. Our current 11lbs, just isn't cutting it...

Craig

Originally Posted by Minor Threat

What about decking the block till you get a decent compression ratio? As I understand right now the compression is low because the pistons sit farther down in the cylinder.

Originally Posted by Foowee

I milled .075 off the deck of my a6 w/ycp vitara's. I had to shorten the oil control jet and the dowel pins. I milled .008 off the head, used a felpro mls z6 three layer hg, and a stock cam gear. All the marks lined up...

Originally Posted by shanerv

how much would you have to deck a a6 block to get the comperession up to around 9 to 9.5 on a vitara setup. I really don't want a dead car on the down low

Originally Posted by Minor Threat

Any idea what your compression is sitting at now?

Originally Posted by Foowee

I'm not too worried about it. That was my original goal with decking, to gain compression. I now think quench gained from decking is much more benificial than the ---- hair of off boost performance.

If I had to guess it's probably around 8.5 to 9.0.

Another option is to build a jdm d15b with d16 eagles/tt/scat/ls rods, vitara's, and a z6 or a6 head. The pistons come out of the hole somewhere around .080... and the crank has the same rod journals as the d16's