Question "easy"

[starsnstripers]

If i wanted to could i change to a smallblock v8gm or 4.3 and stay with my L6 250 straight 6 belhousing? flywheel? drive hub? For future reference?

 

[flabum]

Re: Question "easy"

The flywheel/coupler would not work due to balance issues, plus a late model V-8 and V-6 use a different bolt pattern. Bell housning might work depending on the flwheel/couple configuration. You drive may not be able to handle the horsepower.

 

[achris]

Re: Question "easy"

MC-1 drive are good to about 300hp. I did have one I rebuilt, against my recommendation, put behind a 360 horse worked 350... It lived.

As to the original question. The flywheel covers (bellhousing by your term) are not the same. The bolt pattern may line up, but you have a lot of other issues. The couplers are very different, as well as balance they are a different length. You also have an issue with the exhaust. Currently (165) you have a single pipe going down from the elbow on the port side of the transom. With a V6/V8 you need a Y-pipe, or 'bull-horn' exhaust, for obvious reasons.

Answer 'Easy' - No.

Chris............

 

[oops!]

Re: Question "easy"

when i went from an in line 6 to a 4. nothin worked. the motor mount up front was usless. had to glass in another.
then i ripped out the four and went to a v 6. nothin worked. needed to make new mounts again.
now im goin to a 8. was told nuthin will work.
i thought a 4.3 was a 5.7 that ran into a really big chop saw.
so to stop this crazy stuff, swapin every 2 years. i think im gonna go bbc....an u guessed it, nuthin will work.

good luck
oops

 

[starsnstripers]

Re: Question "easy"

OK ! Enough said, thanks that answers my ? just fine. Easy ? to ask and answer but sounds like not an easy task. I think i like the L6 Thanks Guys I'm not going through what OOPS went through! LOL

 

[achris]

Re: Question "easy"

...i thought a 4.3 was a 5.7 that ran into a really big chop saw.....

Absolutely true. Bond-o and I have debated which 2 cylinders were removed; front, rear or a couple in the middle.

The reason your 4.3 to V8 ran into problems is because the engine mounts (on the side of the block) moved, only about an inch and a half, but enough to be a PITA. Everything else should have been the same save the exhaust elbow extensions and the manifolds.

Chris..............
Slovem Goddem...

 

[starsnstripers]

Re: Question "easy"

I'll stay with the old reliable "stove bolts" economical-reliable. one intake/exhaust, no electronic/computers. There's alot of good stuff said about em. outdated kinda but simple. thanks again gang!

 

[achris]

Re: Question "easy"

The only thing I'd add to your 165 is pointless electronic ignition. Worth the money and then some.

Cheers,

Chris.............

 

[starsnstripers]

Re: Question "easy"

I was seriously considering that but i'm unclear on the advance system with that changeover. do you have to do something to the advance in the dist. for that? I'm going tomorrow to get a 292 L6 found one running for SHHH! 100.00. with a 4brl it can get somewhere around 200hp

 

[achris]

Re: Question "easy"

I was seriously considering that but i'm unclear on the advance system with that changeover. do you have to do something to the advance in the dist. for that? I'm going tomorrow to get a 292 L6 found one running for SHHH! 100.00. with a 4brl it can get somewhere around 200hp

You don't have to change the advance curve, that's set with the weights and srpings under the breaker plate in the dissy. When you buy the kit, just remove the points and fit the new unit. Either optical sensor and magnetic flux pickup, and put the dissy cap back on. The kit will probably have a new rotor with it too.

Just be warned about the 292... really heavy on motion lotion.. petrol, benzene, fuel, gas.... where ever you (or I) happen to be in the world.

Chris...............

 

[starsnstripers]

Re: Question "easy"

so an optical and a flux are two different elec. ign. kits? which one do you suggest? Do you know if the 292 is better on fuel than a small block v8? should be i'd think.

 

[starsnstripers]

Re: Question "easy"

Must be somewhere between a 250 L6 and a say 305 v8

 

[starsnstripers]

Re: Question "easy"

I guess the only diff. between the 250-292 is a longer stroke.

 

[achris]

Re: Question "easy"

so an optical and a flux are two different elec. ign. kits? which one do you suggest? Do you know if the 292 is better on fuel than a small block v8? should be i'd think.

Optical or mag flux are just the pick up. They just tell the main module when to fire. Neither is 'better' than the other.

I do think the 305 would be better on fuel than the 292. (A supertanker is better on fuel than a 292!!!)

I originally had a 165 in the Bertie, changed it in '94 to a 4.3LX (4bbl) and used significantly less fuel. Changed the 4.3LX for a 4.3MPI a year ago and again I'm using less fuel, about 15% less.

Cheers,

Chris...........

 

[starsnstripers]

Re: Question "easy"

so an optical and a flux are two different elec. ign. kits? which one do you suggest? Do you know if the 292 is better on fuel than a small block v8? should be i'd think.

So a super tanker would be a good investment huh? lol I see you like your 4.3 i think their good too, but i'm not going to change mounts,housings,drive hub, etc. atleast not in this boat ( SS 215 slickcraft) I'm thinking about maybe in the ( SS 235 Slickcraft) I might go with 4.3 in that.

 

[achris]

Re: Question "easy"

If you're serious about the 292, then a supertanker would be an excellent investment.

I like the 4.3, but there's nothing wrong with the 165 you have. I had the 165 for 8 years, only changed it because the transom housings were starting to corroded out. Wasn't worth just changing the transom plates, so the discussion with the (now ex) wife went something like this...

We could spend $5,000 on new transom plates and still have a boat worth about $13,000... or we could spend $13,000 and put a completely new engine into a boat with a good hull and we are happy with... or we could sell the $13,000 boat, add another $13,000 to it and find something for $26,000, with an 'unknown' engine and a hull we were unsure of....

We put the new engine in... Best thing I ever did....

Cheers,

Chris..........

 

[starsnstripers]

Re: Question "easy"

Good choice i'd say. Whats the weight/wot speed of your bertie?

 

[achris]

Re: Question "easy"

Good choice i'd say. Whats the weight/wot speed of your bertie?

I think she weighs about 2 and a bit tons. I usually run a 17" "Vengence" SS prop when I've got other people on-board. The other day I was out on my own, hadn't changed the prop, and the 17" was a bit too short. At full throttle the control module as complaining, loudly. I was pulling 5200rpm and the limitier was working overtime. I backed off to about 5100 and was still pulling 40 knots (46mph) by the GPS. I have to put the 19" Vengence on one day and head out on my own again. I expect to get about 42 knots (48mph) at full noise. The leg ratio is 1.62:1.

Cheers,

Chris...........

 

[starsnstripers]

Re: Question "easy"

Nice, sounds like a good set up ya got there. If/when i do the powertrain in the SS235 i'll consider a 4.3 over a v-8. Happy New Year!!!

 

[oops!]

Re: Question "easy"

tee hee
i might have one for you !

4.3 is a very reliable, good choice.

oops