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Search: Posts Made By: 94sylvan
Showing results 1 to 25 of 145
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Forum: General Boating Discussion
03-16-2026, 04:21 PM
Replies: 199
Views: 25,454
Posted By 94sylvan

Been here since 2015. Learned a lot, shared even...

Been here since 2015. Learned a lot, shared even more as I have learned. Grateful for those here with experience.
Forum: General Q & A
09-01-2025, 09:13 PM
Replies: 18
Views: 1,281
Posted By 94sylvan

Good combination overall. I've tried with...

Good combination overall. I've tried with Q-jets. Holleys are just too easy to tune. Guys that can make a Q-jet work deserve a lot of credit. I'd go with an rpm air gap intake and a spacer...
Forum: General Q & A
09-01-2025, 07:54 PM
Replies: 18
Views: 1,281
Posted By 94sylvan

I doubt you're going to be zero decked just to...

I doubt you're going to be zero decked just to get the block deck squared up. .010" in the hole at .030" over bore is only 10.03 with a std. .039" head gasket with a -12cc dish and 64cc chamber. ...
Forum: General Q & A
09-01-2025, 06:31 PM
Replies: 18
Views: 1,281
Posted By 94sylvan

Yes you will be fine with a reasonable timing...

Yes you will be fine with a reasonable timing curve and consistently good fuel. I've built several with similar cam and alum. heads at 9.5 up to 10.2:1 running on 91 no ethanol premium. Most...
Forum: General Q & A
09-01-2025, 12:54 PM
Replies: 1
Views: 393
Posted By 94sylvan

Daytona Sensors Help

I upgraded this year from DUI HEI to Daytona Sensors CD ignition on my NA sbc. mainly for the idle stabilization features. I'm trying to better understand the "retard compensation" effect in the...
Forum: General Q & A
03-06-2025, 04:25 PM
Replies: 29
Views: 4,560
Posted By 94sylvan

If you didn't pick up on the sarcasm, you might...

If you didn't pick up on the sarcasm, you might want to check out this thread.
...
Forum: General Q & A
03-06-2025, 12:56 PM
Replies: 29
Views: 4,560
Posted By 94sylvan

Trash, The sarcasm skipped past you then... ...

Trash,
The sarcasm skipped past you then... Do a search of OSO with my username if you want some marine SBC tech.
Forum: General Q & A
03-06-2025, 10:45 AM
Replies: 29
Views: 4,560
Posted By 94sylvan

Small block chevys don't make any power in marine...

Small block chevys don't make any power in marine applications. You're just wasting your time.....
Forum: Do It Yourself, Boating on a Budget
05-20-2024, 12:43 PM
Replies: 15
Views: 3,716
Posted By 94sylvan

Looks like head gasket was giving up between #4 &...

Looks like head gasket was giving up between #4 & 6 as well.
Forum: Prop Talk
04-19-2024, 07:14 PM
Replies: 6
Views: 1,602
Posted By 94sylvan

What does your slip calculate out to with each...

What does your slip calculate out to with each run? What is your motor combo? Ideal engine rpm? Water doesn't look like much more chop on Sunday but the run seems more like the chop getting you to...
Forum: Do It Yourself, Boating on a Budget
03-24-2024, 03:19 PM
Replies: 15
Views: 3,716
Posted By 94sylvan

Are you planning to pull these down and at the...

Are you planning to pull these down and at the very least replace main, rod, and cam bearings considering the lifter material that circulated through the engines? With stock Merc exhaust the largest...
Forum: Do It Yourself, Boating on a Budget
01-05-2024, 06:38 PM
Replies: 15
Views: 3,716
Posted By 94sylvan

The cough could be ignition (replace points and...

The cough could be ignition (replace points and set dwell and timing, or it could be carb, (lean or rich spot in transition). Nothing wrong with points ignition but a set of DUI marine HEI...
Forum: General Q & A
11-12-2023, 07:53 PM
Replies: 12
Views: 2,452
Posted By 94sylvan

When running solids on a hyd profile, what do you...

When running solids on a hyd profile, what do you do with spring pressures? The solid roller is lighter, but your still a cast cam so you can't get too crazy with pressures.
Forum: General Q & A
11-11-2023, 04:54 PM
Replies: 12
Views: 2,452
Posted By 94sylvan

I've thought about that as well with a tight lash...

I've thought about that as well with a tight lash ( .004 - .006) but hydraulic lash ramps are pretty aggressive because they can rely on the hydraulic cushion to moderate the initial hit. Once a...
Forum: General Q & A
11-11-2023, 01:08 PM
Replies: 12
Views: 2,452
Posted By 94sylvan

solid roller vs hyd roller profile comparison

Anyone made the switch from hyd roller cams to solid roller? looking for comparison numbers on duration to avoid reversion.
Forum: Do It Yourself, Boating on a Budget
06-30-2023, 02:36 PM
Replies: 39
Views: 12,110
Posted By 94sylvan

Curious how close to the '500' hp threshhold Scat...

Curious how close to the '500' hp threshhold Scat recommends this crank for that your build was?
Forum: General Q & A
12-20-2022, 08:10 PM
Replies: 28
Views: 6,588
Posted By 94sylvan

Had a short season this year with work schedule. ...

Had a short season this year with work schedule. only 46.2 " in boat" hours since vac pump was installed (not including dyno time). Engine had 51.3 hours on it since build before the vac pump was...
Forum: General Q & A
12-19-2022, 05:54 PM
Replies: 28
Views: 6,588
Posted By 94sylvan

https://cimg4.ibsrv.net/gimg/www.offshoreonly.com-...

https://cimg4.ibsrv.net/gimg/www.offshoreonly.com-vbulletin/1500x2000/img_5060_original_56ad3bd493d22ba0e23cb8ec9584deea7be71fab.jpg
Forum: General Q & A
12-19-2022, 05:49 PM
Replies: 28
Views: 6,588
Posted By 94sylvan

I'm running a GZ 102 pump on my 394 sbc marine...

I'm running a GZ 102 pump on my 394 sbc marine build. Mahle power-pak pistons with 1mm, 1mm, 2mm ring package. running 6" of vac. while in boat. engine dynoed at 530hp / 519 tq. with dyno headers....
Forum: Swap Shop
11-17-2022, 05:01 PM
Replies: 8
Views: 2,656
Posted By 94sylvan

what are you asking for the throttle / shifter...

what are you asking for the throttle / shifter control and do you have pictures?
Forum: General Q & A
10-30-2022, 01:40 PM
Replies: 8
Views: 3,916
Posted By 94sylvan

I went with a Pro-Systems carb last off-season...

I went with a Pro-Systems carb last off-season for an all-out sbc marine N/A build. previous carb was a worked over 780 vac secondary holley, per Pro Systems went with an annular booster 850. Was...
Forum: Do It Yourself, Boating on a Budget
10-15-2022, 08:51 AM
Replies: 14
Views: 3,704
Posted By 94sylvan

I reached out to the Craigslist seller last...

I reached out to the Craigslist seller last night, already sold. Someone got an early Christmas gift, just not me... Thanks for the heads up though SB
Forum: Do It Yourself, Boating on a Budget
10-14-2022, 06:11 PM
Replies: 14
Views: 3,704
Posted By 94sylvan

The upper is all stock alpha internals correct? ...

The upper is all stock alpha internals correct? If my memory is correct the vertical shaft from the lower is the unique internal?
Forum: General Q & A
09-26-2022, 08:07 AM
Replies: 52
Views: 10,333
Posted By 94sylvan

Run a thermostat. Cold oil can be just as...

Run a thermostat. Cold oil can be just as detrimental to an engine as hot oil. Condensation in cold climates like you are in is one concern, but just getting the oil up to temp (180) before loading...
Forum: General Boating Discussion
08-31-2022, 06:29 AM
Replies: 48
Views: 11,685
Posted By 94sylvan

They were trying to flood the engines, and the...

They were trying to flood the engines, and the stream of water inadvertently hit the throttle and pushed it back to idle which allowed them to board the boat.
Showing results 1 to 25 of 145
 
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