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KA24Tech · Mar 3rd, 2005, 01:57 PM

A good 4-2-1 header is always the way to go for the KA24 on the street, so that you can take advantage of the great low to mid range power. I would only recommend a port & polish if you have done all the other head parts like Jim Wolf Technology S1 Cams, Springs, and Retainers or Colt Stage 2 Cams and Springs. A multi-angle valve job will give you a better bang for the buck than a full port and polish. Besides, in an N/A application you really need to be running at least 11:1 compression in order to take advantage of the higher flow which a good P&P job would provide. But if you really want a really good job done expect to pay ~$2K plus the cost of the 1mm larger valves that Ferrea sells. The largest pipe for a N/A car would be 2 1/4". Also make sure the exhaust has a resonator in the mid pipe or else the exhaust sound gets annoying.

Troy

Mar 3rd, 2005, 01:57 PM	#6 (permalink)
KA24Tech Biru O' Kudasai Join Date: Feb 2004 Location: Golden CO Posts: 1,426	A good 4-2-1 header is always the way to go for the KA24 on the street, so that you can take advantage of the great low to mid range power. I would only recommend a port & polish if you have done all the other head parts like Jim Wolf Technology S1 Cams, Springs, and Retainers or Colt Stage 2 Cams and Springs. A multi-angle valve job will give you a better bang for the buck than a full port and polish. Besides, in an N/A application you really need to be running at least 11:1 compression in order to take advantage of the higher flow which a good P&P job would provide. But if you really want a really good job done expect to pay ~$2K plus the cost of the 1mm larger valves that Ferrea sells. The largest pipe for a N/A car would be 2 1/4". Also make sure the exhaust has a resonator in the mid pipe or else the exhaust sound gets annoying. Troy __________________ SHIFT_Happiness 1992 S13 240SX SE Fastback KA24DE 5 spd - Type X Aero & Seibon Carbon Hood & Hatch -soon GT28RS 1993 U13 Altima SE KA24DET 5 spd w/ Nismo LSD - A high hp FWD can be fun (GT30R Turbo inside) 1990 Z32 300ZX VG30DETT 5 spd - 600HP & Very Civilized (working on twin GT28RS turbos) Still trying to import a 1988 R31 Skyline GTS-R w/ RB20DET-R - only 800 produced (legal under show/display regs)