Hi all. Just out of curiosity, how much can you modified a standard 998 A+? And is the price of modification is worth the money. Or are you better getting a different head?

Any feedback appreciated...

Cheers, Louis

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If you are wanting to mod a head, i'd get hold of a 12G202 (off an 1100) and get that done. You wont be able to drive your car while your current head is off, so get another head done!

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Although ports are smaller inside, GR can mod an A+ 998 head as good as he can a 202 or 295, it just takes a bit longer and costs a bit more $$$.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

you can probly do alot of the work yourself. Its really time consuming but if you stay "conservative" you wont break through anywhere.

I just did an 12g202, it cost me about $500 bucks.

Is the chamber volume of a 998 A+ the same as a 12g202?

if it is go easy on the chamber mods, I had some dramas getting enough compression. I ended up having to mill the tops of my pistons to reduce some of the dish then get the block decked 63 thou. I ended up sitting the pistons out of the block by about 5 thou. I probly have about 10-1 now.

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998 head chambers are 24.5cc, a 202 head is 26.1.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Ok so you can take little more off.

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