Got questions?
We’ve got the answers—the Summit Racing tech department tackles your automotive-related conundrums. This week, we’re looking forward to warmer weather by helping with a marine engine build. Check it out:
G.S. • East Moline, IL
Q: I’m doing a marine engine build this summer and I need your help. The boat is a 1984 Sea Ray Sundancer. The current engine is a Chevy 350 with stock components. I plan on taking the engine .030 inches over to a 355 and rebuilding it with new gaskets and hypereutectic pistons. My question is, what would be the best cam to use for good low-end power and a lopey idle? At full throttle the engine maxes out around 4,200 rpm and it sits at 750 rpm when idling.
A: We’ve got a few options for your wave splitter. To generate rock solid low-end power with a prominent lope, equip your Sundancer with a COMP Cams High Energy cam and lifter kit—either COMP’s CL12-210-2 or CL12-206-2 kit. The second kit produces a little less lope with a comparable powerband. Both kits will also work with your stock cylinder heads, just make sure to double check your valve spring install height.
I just got through with an engine for my 1980 model 21 ft Tahiti. Small block Chevy 350 punched out 60, flat top pistons, Comp Cam roller with 503 lift, 62cc alum heads with stainless valves, glenwood alum water cooled headers out the transom fed by an elderbrock 650 carb. with.100 jets in the front and.128 in the rear. Need to get the spark right and it should work pretty good. Right now it does really good but the HEI distributor I am using just does not work like I want it to….
That baby will past you back. It runs like a spotted ape! Alan took me and Travis and a friend on a ride Saturday. Alan skied and Travis wake boarded. They both looked great on the water. The water was a little too cool for my liking.