I really don't know what HP I will acheive. 67mm throttle body flows into the B18C1 dual intake runners. The dual runners are kept but both re-shaped and bored out. 310cc injectors flow into a ported/ bowled/ seated/ unshrouded/ butterflied HAHAHA B18C1 cylinder head. The type R camshafts and valve train are coupled with adj. camgears.
This cyl head setup is coupled with forged pistons (10.5 - 11/1) on eagle rods pumping in a B18A1 std block. Water/oil pumps/timing belt are rated for VTEC.The crank is slightly shaved and lightened a pound. A Main girdle/ 19lb flywheel (standard B18)/ and fluidampr crank pulley will settle the harmonics. These items will help the B18A1 block to rev a little higher.
The engine will stay natural. The exhuast escapes using a long pipe 4 to 1 header with a 2.5" collector. To increase the velocity I should reduce to a 2.25" cat. And then reduce again after the cat? Or wait until after the cat?
What is the theory ? the farther from the manifold I reduce then the relative effect in the powerband is???? Any ideas? Should I just hand it over to Hy-Tech and be done with it?? JHAjHAJhaHAHA!!!!!!!!

 

if you have the money for a hytech system, i say go for it. :thumbup:

but since you say you already have a 2.5" header, just stick with 2.5" all the way through.

 

hello snp, I just returned from a mini vacation. I am very interested in the various squeezings of the Hy-Tech system. I wish I could understand exactly where to put the exhaust velocity speeder-uppers.
I am going to follow your advice and stay 2.5". I have to use a cat. I have to get one that works. RATS!!!
I will get an elongated resonator after the cat. I think there should be a squeeze exiting the resonator to increase velocity. Then carry the velocity over the axle hump and with a quick turn sideways into an easy flowing but silent muffler........apexi world? HyTech double routing? MIDAS thursday afternoon special?? Haha. THANKS TO ALL.