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Search: Posts Made By: mcollinstn
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01-16-2021, 09:13 PM
Replies: 1
Views: 378
Posted By mcollinstn

What is the Blackhawk reference? An Alpha SS...

What is the Blackhawk reference?
An Alpha SS and a Blackhawk are different animals..
01-16-2021, 09:07 PM
Replies: 20
Views: 906
Posted By mcollinstn

Okay, the blistering paint is definitely a...

Okay, the blistering paint is definitely a warning sign, but before you start major disassembly I have to ask one thing..

Are you 100% sure you don't have air trapped in the drive upper? If you...
Forum: General Q & A
01-13-2021, 09:25 AM
Replies: 27
Views: 1,175
Posted By mcollinstn

I just caught that you have TRS drive. The TRS is...

I just caught that you have TRS drive. The TRS is a bit stouter than a Bravo because it doesn't contain any shifting mechanism.
For a Bravo, 450hp is where things get dicey.
TRS is happy thru 500hp...
Forum: General Q & A
01-13-2021, 01:23 AM
Replies: 27
Views: 1,175
Posted By mcollinstn

Your cam kit choice is for a Gen5/6 Big block. It...

Your cam kit choice is for a Gen5/6 Big block. It comes with roller lifters that require a D shaped retainer plate. The correct tie-bar lifters are required for a MkIV and are more expensive.

At...
Forum: General Q & A
01-10-2021, 04:21 PM
Replies: 9
Views: 599
Posted By mcollinstn

The Vortec flows a LITTLE more than the peanut....

The Vortec flows a LITTLE more than the peanut. The main benefit us the 99cc heart-shaped combustion chamber. You will see a full number bump in compression. Along with that bump, you should add some...
Forum: Formula
01-06-2021, 11:55 AM
Replies: 100
Views: 5,482
Posted By mcollinstn

I wish I had seen this thread before your block...

I wish I had seen this thread before your block work was done.
If your squish height (clearance between the piston quench pad and the head) was .036" to .040" you would have no trouble running 87...
Forum: General Q & A
01-05-2021, 10:28 PM
Replies: 25
Views: 1,091
Posted By mcollinstn

Your stem clearance is normal. If you were...

Your stem clearance is normal.
If you were looking at a high boost motor, the guide material and stem clearance would be more of an issue, as well as the exhaust seat width and face width at the...
Forum: General Q & A
01-03-2021, 05:54 PM
Replies: 25
Views: 1,091
Posted By mcollinstn

4 psi should be plenty safe, even with mid-octane...

4 psi should be plenty safe, even with mid-octane levels. At 4psi, your valves are fine too.
keep total timing under 35.
You are borderline on requiring an intercooler.
If you do choose to add a...
Forum: General Q & A
01-03-2021, 03:21 PM
Replies: 25
Views: 1,091
Posted By mcollinstn

Closed chamber or open chamber head? Squish...

Closed chamber or open chamber head?
Squish clearance?
Intake lobe centerline on cam installation??
Forum: General Q & A
12-30-2020, 12:47 AM
Replies: 29
Views: 1,329
Posted By mcollinstn

Okay, SOME controls use a Honeywell/Cherry style...

Okay, SOME controls use a Honeywell/Cherry style industrial microswitch for the neutral safety switch. 99% of those switches have 3 terminals. Common. Normally Open, Normally Closed. If you do have...
Forum: General Q & A
12-18-2020, 12:20 AM
Replies: 1
Views: 365
Posted By mcollinstn

The Edelbrock RPM AirGap intake is a good choice...

The Edelbrock RPM AirGap intake is a good choice for your stroker.
I'm not sure what your throttle body flow rating is, but the AirGap will flow better than your factory intake..
A bigger issue is...
Forum: General Q & A
11-28-2020, 11:22 PM
Replies: 3
Views: 572
Posted By mcollinstn

"MARINE" electronics are spark protected. In an...

"MARINE" electronics are spark protected.
In an enclosed bilge with a gasoline engine, an open spark can ruin your day.
Sierra branded marine solenoids are in the $25 range, so there's no reason...
Forum: General Q & A
11-23-2020, 11:56 PM
Replies: 4
Views: 533
Posted By mcollinstn

It's safe to figure that you'll burn 1 gallon of...

It's safe to figure that you'll burn 1 gallon of fuel per hour for each 11 horsepower.
A flybridge boat is generally operating in "displacement" at 1,000 rpm.
So, my GUESS is that your 325hp...
Forum: General Q & A
11-20-2020, 11:00 PM
Replies: 47
Views: 2,747
Posted By mcollinstn

Big tipoff of the idle feed restrictor suze is...

Big tipoff of the idle feed restrictor suze is when you said turning out more didn't do anything.

BUT its difficult to make the idle feed Smaller, so you really are better off with easily...
Forum: General Q & A
11-20-2020, 01:29 AM
Replies: 47
Views: 2,747
Posted By mcollinstn

Might be a good time to drill and tap the LSAB...

Might be a good time to drill and tap the LSAB holes for 6-32 brass set screws that you can drill and change out instead of the pressed-in orifices.

Here's some if the stuff that doesn't sound...
11-11-2020, 10:53 PM
Replies: 117
Views: 5,221
Posted By mcollinstn

Diesels typically have a lot more deck surface to...

Diesels typically have a lot more deck surface to provide a platform for the indicator. The only reason I'm suspect of the data is due to the big difference on intake/exhaust on a couple of them. ...
Forum: General Q & A
11-10-2020, 11:23 PM
Replies: 3
Views: 646
Posted By mcollinstn

1) the Centerpoint on the Saginaw valve is...

1) the Centerpoint on the Saginaw valve is adjustable
2) the drives have torque tabs. On a counter rotating twin most guts cut those off flush with the plate. If you're still running em, make sure...
11-10-2020, 11:03 PM
Replies: 117
Views: 5,221
Posted By mcollinstn

Some of those measurements have got too much...

Some of those measurements have got too much "fixture rock" going on.
1) take a clean file (like a 10"-12" medium mill bastard) without a handle and "flat file" the deck surface to get all traces of...
11-10-2020, 09:40 AM
Replies: 117
Views: 5,221
Posted By mcollinstn

Let your shop know you're running a blower....

Let your shop know you're running a blower. Typically, you will want to run a little thicker seat width on the exhaust side to pull more heat out of the valve. At 5psi, it's not a must, but it's a...
11-10-2020, 12:04 AM
Replies: 117
Views: 5,221
Posted By mcollinstn

If you run the GenV cam, you have to run the GenV...

If you run the GenV cam, you have to run the GenV thrust plate and the single roller GenV timing set.
You cannot, however, run GenV/VI hydraulic roller lifters. You have to run "retrofit" tie-bar...
11-09-2020, 08:32 AM
Replies: 117
Views: 5,221
Posted By mcollinstn

No, SC an NA behave the same in regards to...

No, SC an NA behave the same in regards to squish. There are plenty of cases where the trade-offs in getting the numbers just aren't worth it, but they do both benefit similarly to a tight chamber.
...
11-09-2020, 01:25 AM
Replies: 117
Views: 5,221
Posted By mcollinstn

It's your motor, and it's your dollars. .050" is...

It's your motor, and it's your dollars. .050" is pretty much the line in the sand.
Under .045" quench clearance is a "SQUISH MOTOR". Above .055" is not.
A motor with tight quench clearance is...
11-08-2020, 01:18 PM
Replies: 117
Views: 5,221
Posted By mcollinstn

Cut .034 off the block (zero deck). Then run...

Cut .034 off the block (zero deck). Then run .036-.039 gaskets.
Yes, it will increase compression, but the added turbulence from the "squish" benefits you MORE in both WIN/WIN categories. Power...
11-08-2020, 02:06 AM
Replies: 117
Views: 5,221
Posted By mcollinstn

Yep. The 731 (168731) is a GenVI. Most guys...

Yep. The 731 (168731) is a GenVI. Most guys reference the "731" and "741" cam grinds, and I guess I do as we'll, sort of like all cola is Coke. To run a 168731 in a MkIV you have to machine the front...
11-06-2020, 11:23 PM
Replies: 6
Views: 412
Posted By mcollinstn

Did the boat run well previously? Or did you...

Did the boat run well previously? Or did you purchase it like this?
Might want to replace the fuel filter/water separator, dump the carb bowl, try again.
Water in fuel/carb is a very common cause...
Showing results 1 to 25 of 500
 


 
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