Viper is within . 21 mph of hitting 80

[FMP]

Velocity stacks

Almost LOL

[FMP]

The adi transfer ports are .045 Lower than an xs, which will kill top end rpm. Just picked up a 90 to port. I'm going to put the transfers .010 less than the xs, and probably go the same exhaust height as the xs. This thing with efi will have more bottom end torque with a common plenum intake than the stone age carbs would ever have, and I may even put the block in the press, I'll try that on a junk block first, and going with hi domes, compression will help the tork problem, and also going to focus on raising the crankcase compression. But this engine will also have spray

That's a long common plenum. If we're dreaming I'd still prefer 6 individual TB but you're up to spraying and rpm with the xs ports. Crank will need all the support it can get. I think you'll get all the rpm you need with lower porting and increased area plus the spray jmo. Plus it'll have more psi, about 1/3-1/2 way to xs from adi ports. Still, consider extending the chest out a bit 1/4-3/8" with a spacer/divider to give some room under full song with spray. Almost stock length adi tuner( s ) but a bit wider , increasing at ends. With good area through the lower block and adapter.
Fun stuff no doubt.

[Da Bull]

Velocity stacks

Yes but I remember hearing years ago that there was a performance gain by changing the ones from a 115 to the ones from a 150.

[mrcrsr]

Yes but I remember hearing years ago that there was a performance gain by changing the ones from a 115 to the ones from a 150.

Same basic carbs on all the 3 carb inlines, other than jetting and some other minor changes

[Capt.Insane-o]

Id go right to the top of the xs specs put an aluminum flywheel on and send it. You are going to have to pull timing out up top. Kinda been there and melted this and that hosing an inline. You better send your pistons to Bud now for dome coating.

I'll pm you some pics of what I have been messing with for the exhaust when I have idle time.

[FMP]

It's from the internet, it must be right.

[Capt.Insane-o]

At the crank ,maybe.

[FMP]

If someone had enough whatever and the CNC machine and whatever else I think something trick could be done with the l6 chest. A new divider with isolated port sections, the block at the ports milled down to accept. A whole inlay to fit in the chest with angled port runners. The whole chest built out with a spacer for extra volume and the bottom of the block worked to accept. A new silo setup could also be done.

[Da Bull]

What about resleeving for a bigger piston. I always thought an inline needed to be bigger than 100ci. Wayne Weeks would resleeve a V-4 to accept the pistons from the larger 2.6 235hp OMC. This made the V-4 110ci. No replacement for displacement.

I know your just playing around but if you were competing in an open class this might be something to think about. My competitive side just takes over my thinking sometimes.

[FMP]

Waiting for someone to open a storage room somewhere and pull out a prototype Merc L6 looper.
They had the L3 looper, tell me nobody made a few L6. L3 is 90hp I believe with lazy porting, triple carb, blind hole. More ci too.
Weld two together, cut new crank , (123)-(456) , T2 order, two individual triple chests, who doesn't want one?

[Capt.Insane-o]

There is no bore spacing left in the I6..and why would someone weld some junk together that is going to weigh more than a v6 and make less power.

[FMP]

Because they can

[FUJIMO]

Waiting for someone to open a storage room somewhere and pull out a prototype Merc L6 looper.
They had the L3 looper, tell me nobody made a few L6. L3 is 90hp I believe with lazy porting, triple carb, blind hole. More ci too.
Weld two together, cut new crank , (123)-(456) , T2 order, two individual triple chests, who doesn't want one?

...you name it. its already been done. decades ago. by quincy. who worked with, and for, kiekhaefer mercury. track down & buy one of the sixes he did...

[BUZZIN' DOZEN]

[FMP]

Yes, I know the motors, very nice.
Closed chest version?

Two L3 into 1 L6 done correctly without stacks and mildly ported would still yield over 200 prop , closed chest without spinning it to pieces. As far as PH weight on its own, very reasonable.