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Well, come to find out that my engine is going. She's getting tired. So here is my next step. I'm going to build a new engine here. What would make more power with these kind of ports? A gslse or s4 13b. I'm thinking of going with the gslse engine cause of the 3mm apex seals.. This engine will breath through a weber 45dcoe that has been preped by me. This will be my first port job. I've attached a photoshop of two port jobs i saw that i want to put togather. The goal is at least 175 bhp. Auto-x car with the acaisional dragrace. Also I don't want to get too close to the water seal or jacket. cause I'd like to get at least 20k miles out of this engine. Think it's possible?

well after deliberation I figure I might as wel go with the s4 13b because it has the same compression ratio as the s3 with lighter rotors. Although would i be sacrificing anything by having 2mm apex seals as oposed to 3mm.And as far as a 6 port goes. you cant get the duration out of a 6 port that you can a 4 port. The gsl-se is open 80* int the intake stroke. on the s4 & s5 they're open 70* into the intake stroke. So in theory there is more durration to push more air into the engine. correct?

no opinions? not even one?

the s4 motor has bigger ports and runners stock, than the gsl-se engines. plus the rotors are lighter and it has 2mm seals. the 3mm seals are not better

a'ight