From the video it sure looks like any rotation beyond just lifting the nosewheel off the ground will trim the prop.

Let's take this one piece at a time Mike. Can you show me a reference on bearing clearance being different in marinized vs OEM auto engines? Will be the first I have heard of it.

Chris

Sorry to be part of this thread drift. Really need to drop this convo and back to the topic.

Really no benefit for either of us in this discussion. Unless maybe you or I are going to start selling marine engines. Haha. I know I am not.

Mike

Mike,

Via my dad, I have been involved in replacing two boat engines. One was on a Ski Nautique; and yes this was a "customized" engine. The other was in a Chris Craft. For the Chris Craft, they literally bought a crate engine from GM. Nothing custom about it.

Tim

I dunno about only 20hp.

80+mph for hours at a time (pretty common for a family sedan with a four cylinder or a small six), getting 20-25mpg, that's 3-4gph and a lot more than 20hp.

You mean like a Porsche Mooney???

Gasoline powered cars are not allowed to run lean of peak in the US due to emission controls, not kidding.

I have also heard that boat engines have looser tolerances on the main bearings, but I've never checked.

I also tune LS engines, mostly for off road racing, but some street stuff. I see no problem running an LS motor at 75% power or more for long periods of time as long as you have designed adequate cooling and running a proper tune and fuel. Hell we ran an 180,000 mile 6.0 in the 50th Baja 1000 and took 4th in our class! The LS can take it.

You mean like a Porsche Mooney???

as a point of information, engine manufacturers speak of engine load factor in terms of fuel consumption. For example if an engine burns 500L/hr of diesel at full power then 1000 hours at full power would use 500,000 L. If you download the engine ECM after 1000hr and find that it used 100,000L of fuel then the application for that engine is a 20% load factor.

A load factor of 60-70% would be exceptionally high. The only applications that routinely run that are ag tractors and prime power gensets. Look at a tractor if you want to see the size of 300hp diesel engine that can do that and survive.

Marcus

Great to see a fellow OffRoad person on here. We race 6100 (spec LS3) and ran the Baja 1k last year. Our number is 6122 (221 for score) Whipple Superchargers is our main sponsor. So we have a great engine partner.

If you ever see us at a race stop and say hi. We run the BITD series and a occasional Score, Snore.

Here is a pic from two weeks ago at the Laughlin race. Pretty sure I can log PIC time for some of this race. Haha.

Mike

You mean like a Porsche Mooney???

It is not thread drift Mike. You have made some outrageous and inaccurate comments in regards to both the Raptor and the components chosen to build it. When challenged on those comments you then doubled down in other areas you obviously also have zero competence in/knowledge of to support your first erroneous claims. And know, when being called on the carpet point by point to defend the undefendable position you have constructed for yourself it is all falling apart because the facts just are not there. I appreciate you going through the exercise with me and helping me, and perhaps others, pick a more accurate bias in regards to judging the comments you make in the future on this and perhaps other subjects. That is kind of you.

--Chris

Chris,

The first post in this thread, written by Stan Musick, might be useful to you:
viewtopic.php?f=7&t=172432&p=2478681#p2478681

Dean,
I appreciate the sentiment in both the post that Mr. Musik penned, and the fact that you shared it with me. Thank you. I agree, let us extend kindness and understanding.

I also appreciate the sentiment (more fully) in the tag line in your profile.

"TRUTH is AUTHORITY..... Authority is not Truth"

I tried to walk the line dictated by all three.

I tried to understand (and examine) the man's claims and the nature of them.
I tried to be kind. Even told him I appreciated him and he was kind.
I know that truth is the authority.

Tricky to combine all three. Am open to suggestions on improving my performance.

Thank you.
--Chris

Chris

Not sure what your problem is?

I in fact do have experience with marine and auto engines. How many marine engines have you built? I owned a marine and auto performance shop. I literally tune engines all the time. I have gone through the process Peter is going thru many times. How many days have you spent on a dyno tuning a engine?

Answer me this, what qualifications do you have to tell me that I don’t know what I am talking about? Tell me again what claims I made that were outrageous and I will take the time to prove what I have said. Let’s go ahead and go down this road since now you are making it personal.


Edit- I will no longer engage in off topic conversations in this thread. If anyone wants to chat about marine engines PM me and I will give you my number. I Am
embarrassed that I am part of such a silly thread drift, I apologize


Mike