![]() Some of them even have long exhaust durations. There are also heads from Edlebrock that are direct bolt-in replacements on TPI engines (either bolt pattern) but I wouldn't put them in the same league performance-wise as the AFRs. In this article, you’re going to get the best cam for 350 with Vortec heads All five of our choices come with high RPM ratings and top performance. You can't "fool" it by just ditching the EGR system and hoping the ECM doesn't notice.ĪFR 180s are a little spendy for a mild TPI engine but they do flow really well and they are available with both intake bolt patterns and a functional exhaust crossover port. ![]() Except for the very last TPI years the EGR system has a temp sensor built into the system to positively confirm EGR opening. If you plan on using the EGR system (which you must unless you turn it off in the chip programming or risk throwing an EGR-related Check Engine light) make sure those heads have an exhaust crossover. If it's an 87-up TPI you are going to have to modify the base intake manifold to work the older bolt pattern heads OR buy heads that have an 87-up bolt pattern. If your TPI setup is an older 85-86 unit you can bolt it directly onto most performance heads with "standard" 86-down ports and bolt pattern. So, like any engine, match with parts that complement that RPM range.Īlso agreed, performance heads with ~180cc intake runners, 64cc chambers (to match the stock L98 cast iron heads so you don't lose compression) and keep the cam modest- in the 210-215* range. Above 5500 you're really fighting city hall. ![]() They help in the 2500-4500 RPM range but hurt everywhere else. Agreed, TPI stuff is for midrange punch, not high RPM work. ![]()
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