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I'm trying to pick between the I Win Engineering 1.9 Ratio roller rockers with a set of oil-restricted pushrods (stock lifters/cam/valvesprings/retainers) or the SLP 1.8 ratio rockers and their pushrods. The 1.9 ratio rockers with the pushrods is actually like $35-$40 cheaper and puts out a higher lift:
1.6 ratio lift --- 0.413/0.408
1.8 ratio lift --- 0.464/0.459
1.9 ratio lift --- 0.490/0.484
I had heard that our stock heads flow best up to 0.500 lift and worse after that so wouldn't it be better to get the extra lift from the 1.9 ratio rockers and are there any adverse effects from installing these (planning on installing stainless steel stock size valves and viton valve seals)? Also was wondering if there is any true benefit to having the oil restricted pushrods or if I should just go with lightweight ones since I won't be going past 6000 rpms ever.
1.6 ratio lift --- 0.413/0.408
1.8 ratio lift --- 0.464/0.459
1.9 ratio lift --- 0.490/0.484
I had heard that our stock heads flow best up to 0.500 lift and worse after that so wouldn't it be better to get the extra lift from the 1.9 ratio rockers and are there any adverse effects from installing these (planning on installing stainless steel stock size valves and viton valve seals)? Also was wondering if there is any true benefit to having the oil restricted pushrods or if I should just go with lightweight ones since I won't be going past 6000 rpms ever.
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