What is the optimal spring pressure for TR224? Thanks.
10-16-2002, 05:34 PM
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Re: What is the optimal spring pressure for TR224? Thanks. Depends how heavy your valves are.
My ARE heads had 130/305 (seat/open) pressure, but the valves were heavy as hell and it was insufficient.
My GTP heads first came with 918's setup at 130/310, but then I had double springs (987's) put in and I beleive they are now at 150/310.
So....300'ish open pressure looks to be what thunder racing is using.
My ARE heads had 130/305 (seat/open) pressure, but the valves were heavy as hell and it was insufficient.
My GTP heads first came with 918's setup at 130/310, but then I had double springs (987's) put in and I beleive they are now at 150/310.
So....300'ish open pressure looks to be what thunder racing is using.
10-16-2002, 05:48 PM
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Re: What is the optimal spring pressure for TR224? Thanks. The numbers I quoted are for 2.02/1.57 valves that came on the GTP heads. I don't know how your valves will compare weight wise to mine.
10-16-2002, 06:01 PM
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Re: What is the optimal spring pressure for TR224? Thanks. Hydraulic lifters can only handle 330 lbs. open pressure i believe, are these bigger valves quoted 8mm stem diameter or .343" ?
10-17-2002, 03:19 PM
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Re: What is the optimal spring pressure for TR224? Thanks. </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> Hydraulic lifters can only handle 330 lbs. open pressure i believe, are these bigger valves quoted 8mm stem diameter or .343" ?
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I have stock lifters and my open pressure is @360 lbs. at 0.560 lift. I need to find my notes to find the exact lbs. figure. They are MMS springs.
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I have stock lifters and my open pressure is @360 lbs. at 0.560 lift. I need to find my notes to find the exact lbs. figure. They are MMS springs.