Offshoreonly.com - Search Results
Offshoreonly.com

Go Back  Offshoreonly.com > Search Forums
Reload this Page >

Search Results

Register
FAQ
Calendar
Today's Posts
Search
Vendor Directory
Notices
 
Page 1 of 3
1
2
3
Search: Posts Made By: MTScott
Showing results 1 to 25 of 70
Search took 0.01 seconds.
Forum: General Q & A
06-25-2021, 11:54 AM
Replies: 62
Views: 24,395
Posted By MTScott

I'm planning this myself on my 454 mag.... my...

I'm planning this myself on my 454 mag.... my plan was to pump fuel from the stock pump/filter into to a surge tank setup with built in high pressure pump, then run that to the sniper setup.
...
Forum: General Q & A
07-25-2019, 02:15 PM
Replies: 57
Views: 28,727
Posted By MTScott

If you haven't figured IAC yet, you'll probably...

If you haven't figured IAC yet, you'll probably need to do it in the software and burn to the ECU. The IAC is set by default to scale down to 0% at 160*, and you're probably not getting over 150*. ...
Forum: General Boating Discussion
06-06-2019, 10:26 AM
Replies: 2
Views: 719
Posted By MTScott

Well, I determined that the best course of action...

Well, I determined that the best course of action is to buy a GM performance block brand new. Summit has them and it is described as a gen V/VI block. They come with finished bores ready to...
Forum: General Boating Discussion
06-05-2019, 11:10 AM
Replies: 2
Views: 719
Posted By MTScott

More information, this is a carb engine, with a...

More information, this is a carb engine, with a mechanical fuel pump but the fuel pump appears to be part of the sea water pump assembly and driven by the belt. It is a 92 formula.
Forum: General Boating Discussion
06-05-2019, 11:00 AM
Replies: 2
Views: 719
Posted By MTScott

Block options Gen V 454 mag (gen VI?)

Supposing a guy needs to shop for a new block for a gen V 454 mag (I'm not sure yet, but I'm mentally preparing).

...are GEN VI blocks an option if I use my intake, heads and crank? It would be...
Forum: General Q & A
05-09-2019, 03:12 PM
Replies: 16
Views: 8,842
Posted By MTScott

I'm open to a cam change... below are specs I dug...

I'm open to a cam change... below are specs I dug up elsewhere as the crane flat tappet used in the 400/420/425:Crane Part#132561 Grind # H-228/312-2S-14 T1.2
Duration at .004” : 298, 306
Duration...
Forum: General Q & A
05-09-2019, 03:03 PM
Replies: 16
Views: 8,842
Posted By MTScott

I'm not really sure where to find an powerplant...

I'm not really sure where to find an powerplant like that, nor how much it costs.

This motor is original, with about 400 hrs on it now. The original owner didn't use it much. We put about 50 hours...
Forum: General Q & A
05-09-2019, 03:01 PM
Replies: 16
Views: 8,842
Posted By MTScott

My plan was something like this: ...

My plan was something like this:
https://www.cpperformance.com/p-14435-big-block-gm-hi-torque-standard-kit.aspx

But I'm not hard set on anything. While the above might not be the wildest setup,...
Forum: General Q & A
05-07-2019, 12:39 PM
Replies: 16
Views: 8,842
Posted By MTScott

What I'm considering, is an upgrade to AFR 265...

What I'm considering, is an upgrade to AFR 265 heads.

Reasons:
* I think the runner volume on these heads is way out of line. It would only make sense if I ran this engine to 7K rpm, and it...
Forum: General Q & A
05-07-2019, 12:20 PM
Replies: 16
Views: 8,842
Posted By MTScott

Okay, so I found these specs for 990s: ...

Okay, so I found these specs for 990s:

Mercruiser Rectagular Port heads (same as GM 990 castings)

intake / exh valves: 2.19" / 1.88"
Material Cast Iron
Combustion Chamber Open 118cc
Intake...
Forum: General Q & A
05-07-2019, 11:53 AM
Replies: 16
Views: 8,842
Posted By MTScott

Ha, well, I need to know what I'm working with...

Ha, well, I need to know what I'm working with before I make any decisions, yes? I know the rect port heads are well loved, but I'm not sure I'm a huge fan for this application. There, I said it.
...
Forum: General Q & A
05-07-2019, 10:22 AM
Replies: 16
Views: 8,842
Posted By MTScott

454 mag rectangular port head specs?

Does anyone have specs for the rectangular port heads (flow numbers, port volume, combustion chamber, etc...). I've found the specs for the camshaft, but I can't seem to nail down flow numbers for...
Forum: General Q & A
05-07-2019, 10:16 AM
Replies: 63
Views: 17,019
Posted By MTScott

Sorry for the late reply.... When it "spins"...

Sorry for the late reply....

When it "spins" do you get a a high pitched screeching sound? It is probably hitting the flywheel and spinning against it rather than meshing the teeth and fully...
Forum: Do It Yourself, Boating on a Budget
08-03-2017, 01:41 PM
Replies: 16
Views: 4,628
Posted By MTScott

Makes sense to me... I think that's why maybe...

Makes sense to me... I think that's why maybe i'll invest fun money in exhaust manifolds first.

On the head topic, AFR has been mentioned several times, and I see fawning over them from all sorts...
Forum: Do It Yourself, Boating on a Budget
08-01-2017, 03:53 PM
Replies: 16
Views: 4,628
Posted By MTScott

Thanks for talking me down on this gents :). ...

Thanks for talking me down on this gents :).

After doing some research, this engine is a flat tappet cam motor. The roller cam didn't start in the Gen 5 until the 1996 version.

Me thinks,...
Forum: Do It Yourself, Boating on a Budget
07-20-2017, 01:05 PM
Replies: 16
Views: 4,628
Posted By MTScott

Anyone know if this is a roller or flat tappet...

Anyone know if this is a roller or flat tappet cam?
Forum: Do It Yourself, Boating on a Budget
07-19-2017, 11:05 AM
Replies: 16
Views: 4,628
Posted By MTScott

365 carb version

365 carb version
Forum: Do It Yourself, Boating on a Budget
07-19-2017, 10:36 AM
Replies: 16
Views: 4,628
Posted By MTScott

Those promaxx 317 heads can be had for around...

Those promaxx 317 heads can be had for around $1500-$1700 a set, that's cheaper than the eddy heads. Similar AFR heads are get up near $3500 a set.

The Promaxx cost is almost cheap enough to...
Forum: Do It Yourself, Boating on a Budget
07-18-2017, 02:18 PM
Replies: 16
Views: 4,628
Posted By MTScott

Sorry, I guess I didn't answer this completely....

Sorry, I guess I didn't answer this completely. Formula, 252, 1993. The boat weighs about 5K dry, from what I remember. Bravo 1 drive. I've got my holeshot in a decent place by adding a 17P 4 blade...
Forum: Do It Yourself, Boating on a Budget
07-18-2017, 11:19 AM
Replies: 16
Views: 4,628
Posted By MTScott

I'm not hung up on Eddie heads... I'd consider...

I'm not hung up on Eddie heads... I'd consider something else. It seems like my expectation of higher compression was naive. IS there a head out there that will make a significant difference? I...
Forum: Do It Yourself, Boating on a Budget
07-17-2017, 03:47 PM
Replies: 16
Views: 4,628
Posted By MTScott

454 mag, Gen V (carb). Edelbrock heads?

Just curious if anyone has done this (I'm sure SOMEONE has). Overall, there is nothing wrong with the stock rect port heads, but I feel like a lot of power is left on the table with the low (8.6:1)...
Forum: General Q & A
07-05-2017, 06:48 PM
Replies: 63
Views: 17,019
Posted By MTScott

Yeah, 1 shim

Yeah, 1 shim
Forum: General Q & A
07-05-2017, 01:20 PM
Replies: 63
Views: 17,019
Posted By MTScott

so far so good.... got me through a few days of...

so far so good.... got me through a few days of boating; however, once in a while the gear does not connect, and simply spins against the flywheel. 9 out of 10 starts it is fine, and doesn't sound...
Forum: General Q & A
07-01-2017, 06:09 PM
Replies: 63
Views: 17,019
Posted By MTScott

Just gave it a test go.... we have success! No...

Just gave it a test go.... we have success! No bad sounds, cranked over nice. Maybe even faster than the old starter.

Was a good feeling to hear that rumble again. Thanks for sticking with me...
Forum: General Q & A
07-01-2017, 06:02 PM
Replies: 63
Views: 17,019
Posted By MTScott

I'm too embarrassed to tell you what it was, but...

I'm too embarrassed to tell you what it was, but I think you already know.
Showing results 1 to 25 of 70
 
Page 1 of 3
1
2
3


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.