on a stock motor...how much does 1.8R's really help it??
04-04-2004, 07:13 PM
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on a stock motor...how much does 1.8R's really help it?? I'm just curious as to how much they really helped....when I did my MTI heads/X1 cam swap on my 99' I kept the stock rockers.....still made 440rwhp.....how much would have 1.8's helped that motor??
04-04-2004, 08:18 PM
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I just drove my car with them on, and it certainly rpms quicker, and pulls harder....right up until the valves floated at 5500 rpm. I tried getting away with using the stock springs. Wrong! But you most likely couldn't use them with your setup without fly-cutting the pistons. I think MTI Stg II heads are milled .030, and the X1 has what, 590 lift? So that would put you at ~ 625 lift. Not going to work with flat tops....
