anyone try 317 heads with big cam
03-21-2010, 05:22 PM
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anyone try 317 heads with big cam We all know big cams love compression.... but I have a nicely ported set of 317's I want to try with a Tourquer v3 cam. These heads on my LQ4 (dished piston) produce a 9.41:1 comp. ratio. Other than theory, has anyone actually tried a combo like this? A few people have told me I'd be a lot better off with 243's etc..etc.. I am asking the person who has tried these heads. Everything else about the LS series of engines amazes me so why not 9.4 to 1. I would love some #'s or some times.
I'm used to running 37 degrees timing and idleing at 1400 and getting 6mpg on my old scool sbc. Now I'm making more HP, on PUMP GAS, smoother idle, 18 mpg highway, and 28 degrees total timing... these are great engines. I would love to hear from somebody that has tried a similar setup. Is the lower comp. going to absolutely kill TQ down low? Let me know. If no one has tried this, I guess I will waste a day and $160 in GM bolts and gaskets and do the seat of the pants thing. Thanks everybody in advance.
syde by syde
I'm used to running 37 degrees timing and idleing at 1400 and getting 6mpg on my old scool sbc. Now I'm making more HP, on PUMP GAS, smoother idle, 18 mpg highway, and 28 degrees total timing... these are great engines. I would love to hear from somebody that has tried a similar setup. Is the lower comp. going to absolutely kill TQ down low? Let me know. If no one has tried this, I guess I will waste a day and $160 in GM bolts and gaskets and do the seat of the pants thing. Thanks everybody in advance.
syde by syde
03-22-2010, 09:45 PM
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i have a ms4 cam, longtubes, victor jr intake, 750dp holley in a 78 malibu and it has a lq4 with stock 317 heads...car still runs strong for low compression...7.30's 1/8th mile is my best with 4.10 gears on motor..10.70's at 129mph on 150 shot no tune....weighs 3480 with me in it on drag radials...
