throttle body spacer.

[turbo cat]

^^^^^thank you, that clarifys WHY "backpressure" helps torque.

I did not understand until now.


By the way turno cat, did you get my pm about the avatar?

yeah haha u havent had the time but i was going to look for some more pics like those. Ive just been busy getting the turbo cat running

 

[Blue Bomber]

in more primitive times ,before cats and fuel injection, the engine didnt burn as much fuel as it does now. the back pressure would force unburned fuel back into the combustion chamber, thus giving the engine more power. so the theory of back pressure being good is both true and false.

 

[turbo cat]

thats because a carb is a vaccum refrenced fuel system. The smaller the exhaust creates higher velocity which in turn creates a higher vaccum backpressure has always been bad that is proven. this is also why you can idle a efi engine wit ha cam that has lot of duration and overlap better than a carbd motor because yo ucan tune the fuel trim. The low vaccum creates fuel problems wit ha carb