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Forum: General Q & A

01-15-2008, 09:51 AM

Replies: 16

mx 6.2 question

Views: 8,244

Posted By John_S

That 2nd one is for a Black Scorpion. I recheckd...

That 2nd one is for a Black Scorpion. I recheckd another service manual, but still no duration specs listed. I was actually surprised it was in the one for the Black Scorpion.

Forum: General Q & A

01-15-2008, 05:41 AM

Replies: 16

mx 6.2 question

Views: 8,244

Posted By John_S

From Merc Service manual 24 supplement: Engine...

From Merc Service manual 24 supplement:
Engine 377 CID (6.2L)
Lifter Type Roller Hydraulic
Rocker Arm Ratio 1.50 to 1
Valve Lift
Intake 0.3114-.3153 (.79-.80)
Exhaust 0.3160-.3200 (.80-.81)
No...

Forum: General Q & A

04-20-2007, 08:21 AM

Replies: 5

little kid wanting to join big boy's

Views: 726

Posted By John_S

A MPI will be more expensive than a 4brl carb...

A MPI will be more expensive than a 4brl carb 350. I think you will have to buy a complete pkg for the mpi.

Your alpha drive ratios will have to change.

Some will tell you go to a 383...

Forum: General Q & A

04-16-2007, 07:32 PM

Replies: 8

5.7 Mercury Internals

Views: 1,053

Posted By John_S

According Moore's book all production Mercs were...

According Moore's book all production Mercs were 2 bolt mains and cast pistons. My merc service manual on 305 and 350's agrees with what Dennis said. The service manual for the Merc HP 377 EFI...

Forum: General Q & A

04-16-2007, 06:05 AM

Replies: 14

SBC Cam question.

Views: 3,898

Posted By John_S

245, In case you wanted some Merc...

245,

In case you wanted some Merc comparrison info, the following is from Merc HP 377 EFI stroker service manual:

- 350HP
- 9:1 comp ratio
- Lunati Crank 4.0 X 3.75
- Cam w/1.5:1 Roller...

Forum: General Q & A

03-16-2007, 08:19 AM

Replies: 10

A Little Bit Faster

Views: 2,249

Posted By John_S

That rpm seems way too high. Possible bad...

That rpm seems way too high. Possible bad reading, which is common on stock boat tachs.

Forum: General Q & A

12-06-2006, 04:08 PM

Replies: 8

More SBC questions

Views: 1,309

Posted By John_S

Re: More SBC questions

You may want to read this current thread on BOC: Vortec Heads (http://p076.ezboard.com/fbocwebtechnicaldiscussion.showMessage?topicID=18888.topic) We got into allot of discussion on actual vs...

Forum: General Q & A

10-17-2006, 12:09 PM

Replies: 32

Mild SBC Upgrades

Views: 12,257

Posted By John_S

Re: Mild SBC Upgrades

SB: I took a quick look at some Crane roller cam specs during lunch. Crane #109811 appears to be almost the same as stock merc. #104225 (2031) just a hair more lift than stock and 6 degress of...

Forum: General Q & A

10-17-2006, 10:03 AM

Replies: 32

Mild SBC Upgrades

Views: 12,257

Posted By John_S

Re: Mild SBC Upgrades

SB: Those look like the specs I've seen in Dennis's book. I wasn't aware that there was a gm #, though. The cam will probably not arrive at my house for a couple of weeks, to confirm numbers. It...

Forum: General Q & A

10-16-2006, 04:03 PM

Replies: 32

Mild SBC Upgrades

Views: 12,257

Posted By John_S

Re: Mild SBC Upgrades

Guys, I know you mean well, with the continued suggestions to go to a stroker. Please stop before I start to think too much about it, and start asking questions like "Who is good supplier of crate...

Forum: General Q & A

10-16-2006, 09:36 AM

Replies: 32

Mild SBC Upgrades

Views: 12,257

Posted By John_S

Re: Mild SBC Upgrades

SB, I did a test fit with a Performer manifold (not vortec, but known height), trashed edelbrock 1409, and K&N flame arrestor. Clearances should be good for either Performer or RPM. BTW, edelbrock...

Forum: General Q & A

10-16-2006, 04:15 AM

Replies: 32

Mild SBC Upgrades

Views: 12,257

Posted By John_S

Re: Mild SBC Upgrades

Guys, thanks for the comments on cam removal.

Travis, you are over the top! :D Lets just say, this has to stay a civilized family bow rider.

Forum: General Q & A

10-15-2006, 08:42 AM

Replies: 32

Mild SBC Upgrades

Views: 12,257

Posted By John_S

Re: Mild SBC Upgrades

Cuda: yes, I have lots of room around with doghouse removed. Plenty of room to remove damper and cam. My only concern at this time is dropping the front of the oilpan down, just enough to get...

Forum: General Q & A

10-15-2006, 06:36 AM

Replies: 32

Mild SBC Upgrades

Views: 12,257

Posted By John_S

Re: Mild SBC Upgrades

245Limited: I am not sure how Merc comes up with 9.1:1 static compression ratio on my stock engine. 76cc heads, head gasket, deck clearance, and subtracting for recessed pistons gets about the...

Forum: General Q & A

10-15-2006, 05:15 AM

Replies: 32

Mild SBC Upgrades

Views: 12,257

Posted By John_S

Re: Mild SBC Upgrades

One of the "notes" I find about Holleys is "they won't idle in the same place twice" and other comments about poor idle quality. Are they true? The Holley I am most interested in is the 650cfm...

Forum: General Q & A

10-14-2006, 05:42 AM

Replies: 32

Mild SBC Upgrades

Views: 12,257

Posted By John_S

Re: Mild SBC Upgrades

Comments on intake and carb???

Forum: General Q & A

10-13-2006, 05:45 PM

Replies: 32

Mild SBC Upgrades

Views: 12,257

Posted By John_S

Re: Mild SBC Upgrades

A stroker will not meet the "reliable" requirement when it comes to the alpha drive. Also, not looking in pulling engine at this point in time. I thought 6-7hp per mph was realistic. :( Not...

Forum: General Q & A

10-13-2006, 03:07 PM

Replies: 32

Mild SBC Upgrades

Views: 12,257

Posted By John_S

Mild SBC Upgrades

Hi, I think this is my first post here, but have been reading and searching through the great engine upgrade info. I am doing a "mild" upgrade compared to most of what I see here.

I have '97...

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