Advanced Induction 243 CNC port gains 49HP/32TQ and 5 tenths/5mph

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12-01-2011, 04:16 AM

#61

djfury05

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Quote:

Originally Posted by twolow02fransen

more then likey there the 226s i dont think they had the 218s then i just got mine done and they didnt have the 218s and that was three months ago roughly

Yes they did.. I got mine over a year ago and they had em then.. these are the 226's in question though no doubt

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12-01-2011, 07:57 AM

#62

02_Orange_D1SC

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I kinda figured that but I wasn't positive I just don't remember the 218 package

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12-05-2011, 10:08 AM

#63

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Quote:

Originally Posted by Damian

I'll see if I can get Phil to chime in.

Gents, sorry I'd missed this the first time around!

This was the 226cc full CNC work. The 218cc work is a great option for guys who want to stick with smaller cams & turn less rpm, or who just want to save a bit & gain 25-35rwhp vs. the typical 40-55rwhp over as cast 243's.

Quote:

Originally Posted by SideStep

Thanks!

I have been through SEVERAL sets of heads in my wrenching life. My experience is that sub-3000rpm, part-throttle, tip-in suffer from "over-sized" intake runners. They of course will punch out a big peak HP, but I actually drive my cars and I am unwilling to throw away sub-3000rpm performance... I am not so much concerned if these heads actually made more power than the previous heads below 3000rpm, BUT that they did no lose power in that range by comparison.

BTW, I am not saying these heads suffer from the above. I am looking for more results and clarification...

I've yet to have anyone report any losses in the RPM range from the full CNC work applied to 243's. They generally gain from ~2k & up, which is why they tend to work out so well for street/strip/road race toys where you aren't keeping the engine in a 2krpm power band the entire time you're using it.

Thanks guys!

-Phil