Lets build a 502
12-30-2017, 05:15 PM
#11
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iTrader: (3)
I could tell you a basic recipe that I helped a friend/oso member with .
Stock brand new GM 502 shortblock assembly. Engine Quest 320cc heads (stock no porting). Isky valve springs, Ferrea Super Alloy valves, johnson hyd roller lifters, 242/250 112 LSA custom comp cam with .630 lift , Merlin single plane brass lined intake, 850 Quick fuel marine carb. This was a budget build platform to replace the worn out 502 mags, run on 87 octane. (8.7:1 static compression).
Engines were dynoed in full marine trim, all accessories and wet marine exhaust 34* timing. They made 570hp and 550ft lbs. With some dyno headers, and no accessories , prob would have made 600ish. Nothing fancy, just basic build with all new parts, with main goal of reliability.
Stock brand new GM 502 shortblock assembly. Engine Quest 320cc heads (stock no porting). Isky valve springs, Ferrea Super Alloy valves, johnson hyd roller lifters, 242/250 112 LSA custom comp cam with .630 lift , Merlin single plane brass lined intake, 850 Quick fuel marine carb. This was a budget build platform to replace the worn out 502 mags, run on 87 octane. (8.7:1 static compression).
Engines were dynoed in full marine trim, all accessories and wet marine exhaust 34* timing. They made 570hp and 550ft lbs. With some dyno headers, and no accessories , prob would have made 600ish. Nothing fancy, just basic build with all new parts, with main goal of reliability.
12-30-2017, 06:03 PM
#12
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I could tell you a basic recipe that I helped a friend/oso member with .
Stock brand new GM 502 shortblock assembly. Engine Quest 320cc heads (stock no porting). Isky valve springs, Ferrea Super Alloy valves, johnson hyd roller lifters, 242/250 112 LSA custom comp cam with .630 lift , Merlin single plane brass lined intake, 850 Quick fuel marine carb. This was a budget build platform to replace the worn out 502 mags, run on 87 octane. (8.7:1 static compression).
Engines were dynoed in full marine trim, all accessories and wet marine exhaust 34* timing. They made 570hp and 550ft lbs. With some dyno headers, and no accessories , prob would have made 600ish. Nothing fancy, just basic build with all new parts, with main goal of reliability.
Stock brand new GM 502 shortblock assembly. Engine Quest 320cc heads (stock no porting). Isky valve springs, Ferrea Super Alloy valves, johnson hyd roller lifters, 242/250 112 LSA custom comp cam with .630 lift , Merlin single plane brass lined intake, 850 Quick fuel marine carb. This was a budget build platform to replace the worn out 502 mags, run on 87 octane. (8.7:1 static compression).
Engines were dynoed in full marine trim, all accessories and wet marine exhaust 34* timing. They made 570hp and 550ft lbs. With some dyno headers, and no accessories , prob would have made 600ish. Nothing fancy, just basic build with all new parts, with main goal of reliability.
Charter Member
12-31-2017, 11:52 AM
#15
Registered
Thread Starter
Tanks everyone for the info.
That sounds good, is the power usable at that rpm? Im just asking because I dont know...
Looks like i may have to get use to top end rebuilds a little sooner than expected.
I could tell you a basic recipe that I helped a friend/oso member with .
Stock brand new GM 502 shortblock assembly. Engine Quest 320cc heads (stock no porting). Isky valve springs, Ferrea Super Alloy valves, johnson hyd roller lifters, 242/250 112 LSA custom comp cam with .630 lift , Merlin single plane brass lined intake, 850 Quick fuel marine carb. This was a budget build platform to replace the worn out 502 mags, run on 87 octane. (8.7:1 static compression).
Engines were dynoed in full marine trim, all accessories and wet marine exhaust 34* timing. They made 570hp and 550ft lbs. With some dyno headers, and no accessories , prob would have made 600ish. Nothing fancy, just basic build with all new parts, with main goal of reliability.
Stock brand new GM 502 shortblock assembly. Engine Quest 320cc heads (stock no porting). Isky valve springs, Ferrea Super Alloy valves, johnson hyd roller lifters, 242/250 112 LSA custom comp cam with .630 lift , Merlin single plane brass lined intake, 850 Quick fuel marine carb. This was a budget build platform to replace the worn out 502 mags, run on 87 octane. (8.7:1 static compression).
Engines were dynoed in full marine trim, all accessories and wet marine exhaust 34* timing. They made 570hp and 550ft lbs. With some dyno headers, and no accessories , prob would have made 600ish. Nothing fancy, just basic build with all new parts, with main goal of reliability.
Looks like i may have to get use to top end rebuilds a little sooner than expected.
12-31-2017, 06:48 PM
#16
Registered
you may be able to have a cam ground like the 731 w/ mid .500" lifts and then the springs should g 4-500hrs.
12-31-2017, 08:16 PM
#17
Registered
iTrader: (3)
Like sutphen said, you could go with a cam with less lift, like in the 550-575 range, and some isky tool room series springs. That should get you into the 500 hour range before needing to touch it.
