[Healeys] Increased Horsepower

[Bob Spidell]

Curt Arndt will likely respond with the data you've requested, but I once read a piece by a guy who raced--and dyno'd--a 100M and he claimed with some authority that the cold air box actually reduced HP, at least compared to the unfiltered velocity stacks I believe he used instead. Seems reasonable, given that intake air has to make a sharp 90deg turn to get from the CAB to the carb inlets. 

Even on modern, big displacement V8s K&N and other brand 'hi-flow' intake systems only claim a few HP increase on engines that are already over 300HP. 

Bob 

----- Original Message -----



A short while ago, some listers were talking about getting increased 
horsepower in their AH 100's by just changing over to an alloy head with 
better breathing. Keeping stock carbs and still getting a great increase. Does 
anyone have any documentation as to the actual increase? The reason I ask is 
that I have a friend with another 100 and he's thinking of going with full M 
mods, (Cold air box, bigger 1-3/4" carbs, new manifold, new cam, valve 
springs, etc.) and keeping his iron head. I told him about the talk here about 
the alloy head and before he jumps in to the rebuild, I'd like to pass along 
some information before he gets too far in to his project. Thank you all in 
advance for your information. 
Steven Kingsbury 
BN1 #598o;? 
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