Hello,

I am looking for some know how right here. I have just bought a 13b REW and and going to boost prep the block; currently am working out the details on rebuilding and porting and am debating on how i should port the motor.

I was originally planning on bridge porting the motor, but then I wanted more response and power output (planning to track this but would like to be able to occasionally drive the car to and from work and what not). I then thought to Peripheral port the motor but i hear the lifespan is terrible. So my mechanic is saying that we should semi peripheral port the block but i hear a lot about headaches.

I am torn between SPP or BP so I am here to ask for your 2 cents.

 

Semi-p-port should be great if the insert is done well so you don't have sealing issues with the cooling system.

The shot of intake air/gas on the apex seal is a welcome cooling respite to an overworked component in our engines.

2 intake manifolds are readily available now- CX Racing to use stock REW upper intake or Pro-Jay for 4150 TB style intake.

 

So compared to a regular bridge, how will this compare in terms of longevity of the motor, power band, and power output?

Thank you thank you!

 

Semi pp is more reliable than full pp as far I understand. But I don't know where full Bridgeport compares to semi pp had been combined with several different side ports. Such as large street port plus semi-pp. Or Bridgeport with semi-pp. So reliability can vary.