thinking of switching to running N/A over F/I need some input
#1
thinking of switching to running N/A over F/I need some input
my original intent was to go F/I with a procharger setup but i've been thinking about jusy staying N/A. what are my options of bumping up my compression ratio with my cam specs? i am uncertain on the PTV clearance so those who are way more mechanically savvy i'd really appreciate your inputs and suggestions.
im currently running ported and 3-angle valve job 317 heads with colorado speed gold dual springs, chromoly PR, LS6 lifters, and here's my cam spec 232/238 .599"/.601", w/ls6 manifold.
current whp wise i imagine its sitting around 370-380 as it traps 114-115mph at around 300' above sea-level. i would like to shoot for 450-475whp if that's doable on heads alone.
im currently running ported and 3-angle valve job 317 heads with colorado speed gold dual springs, chromoly PR, LS6 lifters, and here's my cam spec 232/238 .599"/.601", w/ls6 manifold.
current whp wise i imagine its sitting around 370-380 as it traps 114-115mph at around 300' above sea-level. i would like to shoot for 450-475whp if that's doable on heads alone.
#4
11 Second Club
iTrader: (2)
IIWM I'd consider some Trick Flow as cast 220's set up TEA or Brian Tooley
with powdered metal guides and perhaps some turned down LS3 valves.
These will flow tremendous amounts of air, jack the compression back up,
and the 13.5 degree valve angle will help with your piston to valve clearance.
Your power level will be met rather easily.
with powdered metal guides and perhaps some turned down LS3 valves.
These will flow tremendous amounts of air, jack the compression back up,
and the 13.5 degree valve angle will help with your piston to valve clearance.
Your power level will be met rather easily.
#6
TIA
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#8
ok, im leaning toward staying n/a. after some reading i can get either 243s or 799s. was thinking about being able to swap the parts from the 317s over to the 243/799 like the TR 7.4" PR, .650" dual springs and ls7 lifters. was thinking about milling the 243/799 to 0.020 or maybe 0.030 and if possible to using ls3 HG? or what HG should i go with and whether measuring the PTV clearance? was also thinking about doing a 3-angle valve job as well? that'll bump the compression up past 10.1 or 10.5:1 if going unported 243s???
#12
Mines close to that with heads/cam but now I want a procharger.
#13
If you're looking for 450+rwhp you're going to have to send those heads out and get them ported. Not sure which intake manifold you're using but the LS6 wont cut it.
Go with the Procharger setup. It may cost a little extra but its a nice gain in power and theres always room for improvement with a blower setup.
Go with the Procharger setup. It may cost a little extra but its a nice gain in power and theres always room for improvement with a blower setup.
#17
i found the spreadsheet for calculating DCR but apparently there are a few variations thats floating out on the net. specifically the values that are in there already under the cam duration@0.200
any body have any idea on how to calculate those? i plugged my specs on teh cam and motor and it shows a DCR of 8.66:1. is that correct?
any body have any idea on how to calculate those? i plugged my specs on teh cam and motor and it shows a DCR of 8.66:1. is that correct?
#18
TECH Senior Member
iTrader: (35)
i found the spreadsheet for calculating DCR but apparently there are a few variations thats floating out on the net. specifically the values that are in there already under the cam duration@0.200
any body have any idea on how to calculate those? i plugged my specs on teh cam and motor and it shows a DCR of 8.66:1. is that correct?
any body have any idea on how to calculate those? i plugged my specs on teh cam and motor and it shows a DCR of 8.66:1. is that correct?
..also what head gasket thickness are you figuring it with?