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TUCK3r
 Post subject: a1456
PostPosted: Wed Oct 29, 2008 5:33 pm 
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A1456 this is the number on the head at the moment is this the standard head for a 998?



cheers TUCK3R
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drmini in aust
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PostPosted: Wed Oct 29, 2008 5:47 pm 
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It's 12A1456, yeah it's for a stocko 998. :wink:
a 12G202 (1098) head is better, but the old 1456 can be ported out the same way, it's just more work (more metal to come out) to get to the same level.

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TUCK3r
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PostPosted: Wed Oct 29, 2008 6:03 pm 
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am i better of going the 202 or stick with the one i have and port that?
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drmini in aust
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PostPosted: Wed Oct 29, 2008 6:22 pm 
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A 202 is better to start with because ports are bigger and so are the inlet valves. Just bolting it on stock is worth around 3 or 4HP.
A 295 is better still, in stock form.. :lol:

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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. :mrgreen:
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TUCK3r
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PostPosted: Wed Oct 29, 2008 7:23 pm 
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ok thanks for the advice.


cheers TUCK3R
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9YaTaH
 Post subject: A Head
PostPosted: Wed Oct 29, 2008 8:16 pm 
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drmini in aust wrote:
A 202 is better to start with because ports are bigger and so are the inlet valves. Just bolting it on stock is worth around 3 or 4HP.
A 295 is better still, in stock form.. :lol:


Doc...but if he ported and polished (shaped the combustion chamber) his existing head...and skimmed it to bring the compression up (maybe hardened seats)...would that be just as good :?:

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drmini in aust
 Post subject: Re: A Head
PostPosted: Wed Oct 29, 2008 8:53 pm 
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9YaTaH wrote:
drmini in aust wrote:
A 202 is better to start with because ports are bigger and so are the inlet valves. Just bolting it on stock is worth around 3 or 4HP.
A 295 is better still, in stock form.. :lol:


Doc...but if he ported and polished (shaped the combustion chamber) his existing head...and skimmed it to bring the compression up (maybe hardened seats)...would that be just as good :?:

Not unless he fits bigger inlet valves, reshapes and deshrouds the chambers, decks it and enlarges the ports a lot.
Around 2x as much work as porting a 202 head, IMO. :wink:

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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. :mrgreen:
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9YaTaH
 Post subject: Re: A Head
PostPosted: Wed Oct 29, 2008 9:56 pm 
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drmini in aust wrote:
9YaTaH wrote:
drmini in aust wrote:
A 202 is better to start with because ports are bigger and so are the inlet valves. Just bolting it on stock is worth around 3 or 4HP.
A 295 is better still, in stock form.. :lol:


Doc...but if he ported and polished (shaped the combustion chamber) his existing head...and skimmed it to bring the compression up (maybe hardened seats)...would that be just as good :?:

Not unless he fits bigger inlet valves, reshapes and deshrouds the chambers, decks it and enlarges the ports a lot.
Around 2x as much work as porting a 202 head, IMO. :wink:


Ohhh? do tell :!: ...so 202 is reasonably desirable for that reason alone 8) :D

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Mick
 Post subject: Re: A Head
PostPosted: Wed Oct 29, 2008 10:06 pm 
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9YaTaH wrote:

Ohhh? do tell :!: ...so 202 is reasonably desirable for that reason alone 8) :D


It was a Cooper 997 head you know...should have Cooper tax applied!

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TUCK3r
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PostPosted: Thu Oct 30, 2008 6:31 pm 
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shhhhhhhhhhhh tax is bad
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