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I just found a fresh rebuilt 400 small block with a cracked head (about 10,000 miles with reciepts for rebuild)for $400. What you really are doing is opening the port to the shape it was designed for. If you must maintain a stock looking port, consider our “ Undercover Porting ”. The result is a dramatic performance improvement in these late-model vehicles. Porting is usually done to increase airflow and horsepower at high RPM. The cylinder head in the link is for the W11 engine for the R53, anyone that offers hand or CNC porting will get varying results, opening up of the ports on the N14 engine cylinder head, is a very skilled job, and is not a simple task, careful consideration must be given to how the air flow will effect the combustion charge! RE: Port & Polish 3.The TBI heads can be improved significantly on the exhaust side by simple DIY porting. This port and polish process to the cylinder heads and intake ensures that the flow mixture enters the cylinder head chamber with the maximum amount of velocity. Port and polish head? Jump to Latest Follow Hey everyone! Enter your ride HERE to be a part of October's Ride of the Month Challenge! 1 - 20 of 28 Posts.So, more or less, we port a set of heads, we get the peak CFM’s from each runner from A guy that I have ridden with a few times (friend of a friend/fourwheelers) decided that he was going to port and polish his own head and it ended up costing him a new head. But a simple clean-up is easy for anyone to do. Pricing is for traditional V-8 cylinder head pairs. The Honda K-series heads are very well designed, with the Z3 being one of the best. Jump to Latest Follow 1 - 15 of 15 Posts. On the subject of "bowl work", the short turn radius is by far the most critical area of the Raptor head.ohhhh whatever i do Ill have my super custom intake thats still at the machinist on it But for your head i would send it to racers edge and let them do their magic. stock on hybrid build OK, so my engine is currently being rebuilt by rallitek. Competition Cams makes the CompuCam 2000 which is "computer freindly". If you were to do an MPFI swap then you'd have to swap the head for a 2. About 10 times thinner than a Pontiac 400-455 Engine, Olds 425-455 & 366-427 Tall Deck, & Musclecar era 1965-1974 BBC engines. The Vortec heads offer great intake port flow despite the rather small 1.I figure that it ought to yield the potential of 275 HP in the 305 and be good to about Where you can gain substantially more power is by concentrating on the exhaust side of the head. the smaller Rochester 500 TBI unit on the 2. 0 head should be less than $600 if you go with a used head. Through countless hours on the flow bench, Phil refined his approach to head and manifold re Cylinder Head Porting and Polishing. Wondering if it is worth it or not and what the advantages are of doin' it? 1995 Dodge Ram 2500, CTD, 4X4, 4" Turbo Back 6" Tip, Custom Fuel Plate, Star Wheel Cranked, Formula 1 Mach 4 Inj. The exhaust ports were opened up huge and almost round, requiring special Fireball headers. Spray it with a light coat of white paint. In my early stages of testing, I found 30 cfm by raising the short side on an otherwise untouched port. So after the fix you can see how the car responded. Re cut the valve seats till the seat angle (45) reaches the very tip of the valve.
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Most exhaust ports and transfers get smoothed but not polished. Also I'm going to be practicing on a set of swirl port heads from a 92 TBI 350.Competitors products are known to cause issues and is why we are famous for this simple, yet If you go bigger vavles, Springs, cams, ect then the magic begins but in oirder to feel these effects you need everythgin else dont like big turbo, huge injectors, some sort of serious piggy back set up. We will port the throttle body open to its most extreme limits without compromising throttle response. People port heads for one reason, and one reason only: more power.I think i may be the only I4 person on here to do this so here it is Im going to do a Port and polish job on my head im going to gasket match the intake and exhaust ports and then port match the intake manifold while also boring the tb and port matchnig that to the IM and of course polishing.2 into a performance motor but starting with a 5. I would take it to a shop, they will probably port and polish your whole setup for less that $200.