Who's got a desk top dyno?
02-07-2017 | 11:00 PM
#22
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Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
I got 630hp with that combo, and 612HP, with the stock 525sc camshaft in it.
Stock 525sc cam, was 228/236 114 LSA .530/.551
731 cam, is 226/236 112 LSA. .587/.610
That would make sense to me. If I recall, griff replaced his stock flat tappet cam in his 525sc, for the 731, and picked up about 100rpm. Thats probably around 20-25hp gain. Cams are fairly similar duration wise, a bit more lift /lifter acceleration with the roller design. Thats about what I think should be expected when going from a flat tappet to hyd roller cam. Its certainly not 50+HP like some may suggest.
Thats figured with small headers and right about 5lbs boost. I am sure if its dynoed with big tube dyno headers , those numbers will be higher. Prob 650 plus with the 731 cam, dyno headers, etc.
Stock 525sc cam, was 228/236 114 LSA .530/.551
731 cam, is 226/236 112 LSA. .587/.610
That would make sense to me. If I recall, griff replaced his stock flat tappet cam in his 525sc, for the 731, and picked up about 100rpm. Thats probably around 20-25hp gain. Cams are fairly similar duration wise, a bit more lift /lifter acceleration with the roller design. Thats about what I think should be expected when going from a flat tappet to hyd roller cam. Its certainly not 50+HP like some may suggest.
Thats figured with small headers and right about 5lbs boost. I am sure if its dynoed with big tube dyno headers , those numbers will be higher. Prob 650 plus with the 731 cam, dyno headers, etc.
02-08-2017 | 12:52 AM
#23
Charter Member # 55
Joined: Oct 2000
Posts: 20,272
Likes: 2,513
From: Omaha/LOTO
I got 630hp with that combo, and 612HP, with the stock 525sc camshaft in it.
Stock 525sc cam, was 228/236 114 LSA .530/.551
731 cam, is 226/236 112 LSA. .587/.610
That would make sense to me. If I recall, griff replaced his stock flat tappet cam in his 525sc, for the 731, and picked up about 100rpm. Thats probably around 20-25hp gain. Cams are fairly similar duration wise, a bit more lift /lifter acceleration with the roller design. Thats about what I think should be expected when going from a flat tappet to hyd roller cam. Its certainly not 50+HP like some may suggest.
Thats figured with small headers and right about 5lbs boost. I am sure if its dynoed with big tube dyno headers , those numbers will be higher. Prob 650 plus with the 731 cam, dyno headers, etc.
Stock 525sc cam, was 228/236 114 LSA .530/.551
731 cam, is 226/236 112 LSA. .587/.610
That would make sense to me. If I recall, griff replaced his stock flat tappet cam in his 525sc, for the 731, and picked up about 100rpm. Thats probably around 20-25hp gain. Cams are fairly similar duration wise, a bit more lift /lifter acceleration with the roller design. Thats about what I think should be expected when going from a flat tappet to hyd roller cam. Its certainly not 50+HP like some may suggest.
Thats figured with small headers and right about 5lbs boost. I am sure if its dynoed with big tube dyno headers , those numbers will be higher. Prob 650 plus with the 731 cam, dyno headers, etc.
I was running the stock bottom end with 7.5 CR pistons and about 7.5# of boost. I estimated I was around 560-570hp.
I figure the extra boost I had and his 1 point higher CR are pretty much a wash for HP.
I'm not sure how much the promaxx heads will gain hp wise. Maybe 20-30hp???
02-08-2017 | 06:06 AM
#26
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Joined: Apr 2006
Posts: 10,041
Likes: 712
From: Toledo Oh
I got 630hp with that combo, and 612HP, with the stock 525sc camshaft in it.
Stock 525sc cam, was 228/236 114 LSA .530/.551
731 cam, is 226/236 112 LSA. .587/.610
That would make sense to me. If I recall, griff replaced his stock flat tappet cam in his 525sc, for the 731, and picked up about 100rpm. Thats probably around 20-25hp gain. Cams are fairly similar duration wise, a bit more lift /lifter acceleration with the roller design. Thats about what I think should be expected when going from a flat tappet to hyd roller cam. Its certainly not 50+HP like some may suggest.
Thats figured with small headers and right about 5lbs boost. I am sure if its dynoed with big tube dyno headers , those numbers will be higher. Prob 650 plus with the 731 cam, dyno headers, etc.
Stock 525sc cam, was 228/236 114 LSA .530/.551
731 cam, is 226/236 112 LSA. .587/.610
That would make sense to me. If I recall, griff replaced his stock flat tappet cam in his 525sc, for the 731, and picked up about 100rpm. Thats probably around 20-25hp gain. Cams are fairly similar duration wise, a bit more lift /lifter acceleration with the roller design. Thats about what I think should be expected when going from a flat tappet to hyd roller cam. Its certainly not 50+HP like some may suggest.
Thats figured with small headers and right about 5lbs boost. I am sure if its dynoed with big tube dyno headers , those numbers will be higher. Prob 650 plus with the 731 cam, dyno headers, etc.
02-08-2017 | 07:17 AM
#28
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Joined: Apr 2006
Posts: 10,041
Likes: 712
From: Toledo Oh
I have a set of stainless marines, with regular risers and a set thats dry to the tip. I would like to get by with the standard risers if possible so I dont become that guy with the noisy azz boat.
02-08-2017 | 01:31 PM
#29
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Joined: Jul 2004
Posts: 11,332
Likes: 73
From: chicago
My fully jacketed stellings , with gaffrig superflo series mufflers, switched to closed , sounds as quiet as a set of stock 330s.
