Does the dual snorkel air cleaner with hoses to the front really do any good for more air and could a set up for a 69 olds fit a 70 cutlass 455

 

Yes and Yes. More air more importantly cooler air which equals a denser charge. Aftermarket OAI kits are available too.

 

Tests have shows about a 1 HP improvement for every seven to ten degree F reduction in inlet air temp. Changing from sucking 180 degree underhood air to sucking 70 degree outside air can result in about a 10-15 HP increase due to the higher inlet air density. Keep in mind that you make HP by increasing the amount of air mass that flows in and out of the engine. Higher density air means more mass airflow at a given RPM, thus more HP.

 

Thanks for the reply. I found a nice dual snorkel set up with hose etc on e-bay but its $750. Do you have another source or is this a good price thanks wagsk2000

 

Where can I find an OAI kit

 

"1 HP improvement for every seven to ten degree F reduction in inlet air temp"
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Ah so that explains why in the winter my car spins the tires easily. Extra HP from the -20F air!

But seriously if you wish to add OAI to the 1970 Cutlass, then the $750 1969 type setup with under bumper scoops would be a good affordable alternative to the factory OAI hood and flapper door air cleaner lid at more like oh what is it now $3000 or so for reproduction pieces?

You may need to cut holes in the fender liner, move things, improvise as necessary.

 

Google. A brief search will turn up all the repro parts vendors who sell them, including this one currently on ebay.

 

OPGI has everything needed. Be aware the 68 ducts are slightly different from the 69s. Same goes for the air cleaner bases, but that wouldn't concern you if mounting to a 70. Just get the cleaner base that best matches where your valve cover vent(s) are located. Im partial to the 68s as they are wider and thinner and tuck under better.