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Search: Posts Made By: SB
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Forum: Do It Yourself, Boating on a Budget
05-18-2014, 06:35 AM
Replies: 83
Views: 20,728
Posted By SB

Generally you are right. The good news was since...

Generally you are right. The good news was since GM did the swap on the 8.1L, it made the cores cheaper and thus not much more money for someone with the standard BBC.

When it was a lot more...
Forum: Do It Yourself, Boating on a Budget
05-15-2014, 04:27 PM
Replies: 83
Views: 20,728
Posted By SB

I would like to mention, while on the subject of...

I would like to mention, while on the subject of BSFC's, be very warry of other dyno sheets floating around internet land where all are in the .300's. Very, very good chance it's because of inflated...
Forum: Do It Yourself, Boating on a Budget
05-15-2014, 04:23 PM
Replies: 83
Views: 20,728
Posted By SB

Me comprendo. Issue with the A/F readings on...

Me comprendo.

Issue with the A/F readings on this sheet along with a million other sheets that the dyno does not read A/F Ratio from wideband is that they are wrong. Suks huh ?

When dyno's...
Forum: Do It Yourself, Boating on a Budget
05-15-2014, 12:53 PM
Replies: 83
Views: 20,728
Posted By SB

MT , Different Dyno SAE standards, but that was...

MT , Different Dyno SAE standards, but that was another thread. Regular 607 Standards and would be 600 plus/minus a few.

Anyhow, well known, looking for 600+ time to move on to something else....
Forum: Do It Yourself, Boating on a Budget
05-15-2014, 12:00 PM
Replies: 83
Views: 20,728
Posted By SB

BSFC is not really a good measurement of lean or...

BSFC is not really a good measurement of lean or rich. Yes, it's #'s can be swayed by lean or rich but that, again, is not the true nature of BSFC.

It is how much fuel it takes to make each HP.
...
Forum: Do It Yourself, Boating on a Budget
05-15-2014, 11:55 AM
Replies: 83
Views: 20,728
Posted By SB

No. Even the 500EFI has a hard time with this HP....

No. Even the 500EFI has a hard time with this HP.

MPI has a good intake for a tow truck.
Forum: Do It Yourself, Boating on a Budget
05-11-2014, 09:49 PM
Replies: 83
Views: 20,728
Posted By SB

I look at CFM #'s a lot. Of course I do. Ooops,...

I look at CFM #'s a lot. Of course I do. Ooops, forgot I'm SB here. Normal name is CFM.

Anyway - anyone notice this Motor could have used more carb ? Also, it looks like the carb had difficulties...
Forum: Do It Yourself, Boating on a Budget
05-11-2014, 07:58 PM
Replies: 83
Views: 20,728
Posted By SB

Different motors. Different rpms, heads, cam,...

Different motors. Different rpms, heads, cam, compression, etc,etc.

Read what I said about cam overlap vs exhaust.

Also, I've been a part of 100's of non marine engine dyno tests and I'll tell...
Forum: Do It Yourself, Boating on a Budget
05-10-2014, 09:15 AM
Replies: 83
Views: 20,728
Posted By SB

Totally depends on the motor build up. Also...

Totally depends on the motor build up.

Also camshaft vs exhaust sizing/wave tuning has a large effect.

I did a few million tests on a basic small cam low compression 502cid/540hp with wet...
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