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Search: Posts Made By: underpsi68
Showing results 1 to 25 of 229
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Forum: General Q & A
Yesterday, 05:24 AM
Replies: 7
Views: 250
Posted By underpsi68

Sounds like the sensor ground circuit or 5v...

Sounds like the sensor ground circuit or 5v circuit has a bad connection somewhere.
Forum: General Q & A
04-19-2024, 02:10 PM
Replies: 15
Views: 566
Posted By underpsi68

I had a 5000btu 120v ac unit on my boat. A grp 27...

I had a 5000btu 120v ac unit on my boat. A grp 27 battery would last 2 hrs using an inverter on it.
Forum: General Boating Discussion
04-13-2024, 11:10 AM
Replies: 5
Views: 438
Posted By underpsi68

You go first......

You go first......
Forum: General Boating Discussion
04-05-2024, 06:23 PM
Replies: 3,958
Views: 1,014,830
Posted By underpsi68

Lake Mead? :ernaehrung004:

Lake Mead? :ernaehrung004:
Forum: General Q & A
03-30-2024, 03:27 PM
Replies: 26
Views: 1,076
Posted By underpsi68

11.3 on a "charged" battery is ng. Battery is...

11.3 on a "charged" battery is ng. Battery is junk, if your charger is working property.
Forum: General Q & A
03-24-2024, 09:02 AM
Replies: 8
Views: 365
Posted By underpsi68

If the oil cooler was part of the cl system, the...

If the oil cooler was part of the cl system, the cooler wouldn't work as well. Instead of having sea water temps cooling the oil, you would have engine coolant temps cooling the oil.

Not to...
Forum: General Q & A
03-23-2024, 12:05 PM
Replies: 38
Views: 3,818
Posted By underpsi68

no

no
Forum: Wanted
03-16-2024, 10:18 PM
Replies: 18
Views: 753
Posted By underpsi68

If you looking for a 29 or smaller I would get a...

If you looking for a 29 or smaller I would get a single. Just my 02
Forum: General Boating Discussion
01-19-2024, 06:54 AM
Replies: 40
Views: 5,421
Posted By underpsi68

I doubt it's much of a restriction at such low...

I doubt it's much of a restriction at such low boost level.
Forum: General Boating Discussion
11-29-2023, 09:28 PM
Replies: 39
Views: 5,033
Posted By underpsi68

Didn't you always answer threads here "get an...

Didn't you always answer threads here "get an Apache"? :party-smiley-004:
Forum: General Q & A
11-16-2023, 07:43 PM
Replies: 38
Views: 3,818
Posted By underpsi68

There was a very good post a few years back by...

There was a very good post a few years back by Eddie Young (I think). He shows how to add a bung in the stock style risers. That's the way I would go. No need to worry about the exhaust routing...
Forum: General Boating Discussion
11-15-2023, 06:52 AM
Replies: 65
Views: 7,218
Posted By underpsi68

On my 28 velocity with stock 496ho, fuel burn was...

On my 28 velocity with stock 496ho, fuel burn was 3mpg at 45-48 mph and 2mpg at 68-70 mph. A twin would never get that imo.
Forum: General Q & A
11-13-2023, 12:54 PM
Replies: 38
Views: 3,818
Posted By underpsi68

You will have lower fp at idle/high vac than if...

You will have lower fp at idle/high vac than if the engine is under load.

Check the fp with the vac line removed from the regulator. If it tests good, you need to test fp at wot to see if the...
Forum: General Boating Discussion
11-11-2023, 08:02 PM
Replies: 13
Views: 1,402
Posted By underpsi68

I agree with rak. That first boat you...

I agree with rak.

That first boat you listed, the colors are hideous, imo. Would be a hard sell in the future.

Why would a 29' single engine boat need a 3 axle trailer?

I wouldn't want...
Forum: General Q & A
11-11-2023, 01:28 PM
Replies: 12
Views: 1,185
Posted By underpsi68

What about solid roller lifter on hydro lobe?

What about solid roller lifter on hydro lobe?
Forum: General Q & A
11-06-2023, 10:47 AM
Replies: 30
Views: 1,648
Posted By underpsi68

Do yourself a favor and drain all the old fuel...

Do yourself a favor and drain all the old fuel out first
Forum: Cigarette
11-02-2023, 07:42 PM
Replies: 224
Views: 40,502
Posted By underpsi68

This is the machine I have;...

This is the machine I have;...
Forum: Cigarette
11-02-2023, 07:32 PM
Replies: 224
Views: 40,502
Posted By underpsi68

I run pump E85 99% of the time. By me it is 85 %...

I run pump E85 99% of the time. By me it is 85 % in the summer (still 84% a week ago the last time i filled up), and usually 75% in the winter but can go down to 70%.

Alcohol doesn't have any/much...
Forum: General Boating Discussion
10-31-2023, 08:31 PM
Replies: 11
Views: 1,648
Posted By underpsi68

Looks like 15 lbs of boost on 260ci. That's...

Looks like 15 lbs of boost on 260ci. That's making some good power for that size.

I had my sbf at 31lbs on 9:1. I was scared, but it took it no problem lol.
Forum: Cigarette
10-30-2023, 06:41 PM
Replies: 224
Views: 40,502
Posted By underpsi68

Not necessarily. Could have been e82, e80, e78,...

Not necessarily. Could have been e82, e80, e78, e75 etc. Pump could be off from e10 also. Could be higher. I have seen over e10 at the pump near me.
Forum: General Boating Discussion
10-30-2023, 06:38 PM
Replies: 11
Views: 1,648
Posted By underpsi68

5 minute 4hp+ per ci marine engine dyno pull

https://youtu.be/L1P-eaQHkXc?si=IYbLAcUosX9Zm-Vx

How hot does that dyno get?
Forum: General Boating Discussion
10-27-2023, 05:29 AM
Replies: 50
Views: 7,428
Posted By underpsi68

Nice build!!! Good luck and keep us posted!!! ...

Nice build!!! Good luck and keep us posted!!!

I'm guessing mid 80s and a bravo 30 prop.
Forum: Fountain
10-22-2023, 08:55 AM
Replies: 16
Views: 1,639
Posted By underpsi68

Prochargers claim of 615hp on a bone stock 496 at...

Prochargers claim of 615hp on a bone stock 496 at 3psi is a little over zealous. It's probably closer to 500hp.
Forum: General Q & A
10-17-2023, 11:28 AM
Replies: 13
Views: 1,047
Posted By underpsi68

this They work great. Keep the air above dew...

this

They work great. Keep the air above dew point and no need to drain. Very little electric draw.

I have 2 west marine versions for sale, if interested.
Forum: General Q & A
09-14-2023, 02:33 PM
Replies: 12
Views: 888
Posted By underpsi68

I don't think that was on the 496. I think it...

I don't think that was on the 496. I think it was the 600sci??

What can take out the iac on these engines is a small filter in the tb that gets clogged with belt dust. Make sure you change the...
Showing results 1 to 25 of 229
 
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