|
Re: A15 and assorted bits | Subject: Re: A15 and assorted bits by andrewjdonoghue on 2001/12/26 4:08:00
Generally the engine nond the engine designation are seperate. Look near the dizzy if it's mounted on the middle of the driver's side for the designation. Otherwise still on the drivers side but near the back just below the line of the head. Shave 60 thou of the head to up the compression (stock could be 8.3 or 8.9:1). You can do this safely and run on standard unleaded petrol - this is what I took off mine. You can use and A12 head, but the A15 has heaps better ports and valves - which makes it's compression ratio carby, and cam even more of a waste. Don't bother porting an A15 head as it's heaps better than A12 heads and will probably take more than the valves can take. Also the A12 head will be too high compression without work to reduce it or high octane fuel. The bottom end of an A15 is more than strong enough for most sensible uses, even mild turbo charging (under 14psi). If you want to turbo, leave the compression (head) alone and use either the stock cam or the A12 cam. Use A12 or a reground cam for atmo engines (but don't accept anything or believe any excuses for a cam that can't be dialled in without adjustable cam gears - a price of being to busy at work to do it properly (yourself)). I'd go the factory A12 one, partly due to the bullsh*t I've gone through with nearly every aftermarket cam I've had in any of my cars. Also you should have a spare if you're chucking an A12. Also, then you know the dizzy advance is right to match the cam (but maybe not the compression) Most A12/A15 swaps in OZ are a straight swap, due to the crossmember we use in most 1200's. For instance most utes use what was effectively an L13 crossmember (don't ask cos Aussies never saw this engine). This isn't necessarily so elsewhere in the world. If not look for the differences in crossmember before you pay for one. Use the A12 carby over the A15 - bigger jets. Dellortos or side draft webers are popular, but I'd go with 32/36 weber for the cost and driveability. What more do you need than this? Carb cam and engine mods all covered.
|
|