summit 8802 or LT1 hot cam
10-06-2025 | 10:10 AM
#11
Registered
Joined: Jun 2011
Posts: 1,209
Likes: 141
Lift seems closer to the Comp extreme efi cams. I have experience with the extreme 268efi. Lots of boating hrs in fact. 268xfi hydroller 218/224 at .050 113lsa .570/.565 lift with 1.6 ratio rockers
But….it’s not the same cam is the summit one in question, so….i have nothing , really, for you.
Also, with stock exhaust ? Nope.
Not many (i really don’t remember any) have run any performance cam (218 at .050” or higher) , so you’ll have to do a real search to find some. I do remember a few using 212 at .050” comp cam marine extreme cams.
But….it’s not the same cam is the summit one in question, so….i have nothing , really, for you.
Also, with stock exhaust ? Nope.
Not many (i really don’t remember any) have run any performance cam (218 at .050” or higher) , so you’ll have to do a real search to find some. I do remember a few using 212 at .050” comp cam marine extreme cams.
10-06-2025 | 06:35 PM
#13
Registered
Joined: Nov 2004
Posts: 14,090
Likes: 3,681
From: On A Dirt Floor
reason for asking is the better exhaust port flows out, usually the better in also. :yack
Don’t worry about that crap. You’re fine. :thumbs
10-06-2025 | 07:13 PM
#14
Registered
Joined: Jan 2007
Posts: 2,070
Likes: 1,183
From: Murrayville Georgia
dont know any thing about that cam but I have run 3 or 4 Summit flat tappet cams in the last few years. I used delphi hardened lifters and have never had failure on any of them. two were in different 454's in my jet boat and they both spent all their time at either idle or 5500 and they were not treated well but they held up fine. obviously they do not make them themselves and I dont know who grinds them for Summit but I have no complaints about them.
10-06-2025 | 07:13 PM
#15
Thread Starter
Registered
Joined: Jul 2025
Posts: 22
Likes: 2
Skip White NKB heads with a 68cc chamber...About 9.7 to 1 compression....I having them build the bottom end 383 CI since their crew has like 200 years experience..Performer intake with a QJ....I think I'm just gonna get the comp 270 Marine cam..In for a nickel, in for a dime....Thx.
Last edited by Mariah212; 10-06-2025 at 07:24 PM.
10-06-2025 | 08:29 PM
#17
Thread Starter
Registered
Joined: Jul 2025
Posts: 22
Likes: 2
I hear ya..He actually has a good deal on a 383 short block..2900.00 not assembled....4 bolt main block, cast Scat crank and their 4130 rods and Wiseco forged pistons...He seems like he actually knows marine stuff...I didn't have much luck with Smelding....They don't like marine stuff and they weren't very open to the idea...As far as why I don't build it...Cost...I'm gonna have 2k in machine work on 2 bolt main block...thx.
10-07-2025 | 03:17 AM
#18
Registered
Joined: Nov 2004
Posts: 14,090
Likes: 3,681
From: On A Dirt Floor
10-07-2025 | 10:20 AM
#19
Registered
Joined: Jun 2011
Posts: 1,209
Likes: 141
I don't mean to derail this thread, but to answer your question SB I have run two different sets of heads. First set were a pair of Dart Iron Eagle 165cc runner with 1.92/1.60 valves. No issues. Currently running some aluminum CNC AFR 195s with 2.05/1.60 valves.
10-07-2025 | 10:01 PM
#20
Thread Starter
Registered
Joined: Jul 2025
Posts: 22
Likes: 2
Question...My old engine has a good set of knock off vortec heads... 1.94/1.5 that I mildly ported...Can't decide if want to sell that as a good running engine, rob the heads, or just pony up for some NKB aluminum heads...Not sure if I can get away with 9:7 CR on a cast iron head on 93 octane...They are obviously wuhan heads of somekind...They ran fine all of last season....Thoughts? appreciate it...
