457" pump gas w9 motor.

https://youtu.be/dpmcLMdqv88

[img]https://i.postimg.cc/cHWgTm0X/IMG-0748.jpg[/img]

[img]https://i.postimg.cc/3JfG7mFx/IMG-0749.jpg[/img]

[img]https://i.postimg.cc/rwvtRTb6/IMG-0788.jpg[/img]

[img]https://i.postimg.cc/25hL4JR1/IMG-0793.jpg[/img]

Latest Ritter block
Molnar crank and Rods
Custom icon pistons
11.6 to1
4.200" bore
4.125" stroke
1050 4500 carb.
60mm cam
My w9 CNC program
Steel 2.15" in. 1.60" exhaust.
Tall deck Mopar intake with not much work was done before I got the stuff from engine owner.

Started out with know good carb on race gas
Just switched over to pump gas tonight.

811 HP
670 TQ on race fuel and a good 1150 (did not try to beat on race gas tune)
That was just to make sure it's all good.

Best pull on pump gas so far 804 660.

Awesome numbers,are the W9s max effort ?

Any issues with the Ritter block?

Wow! Great build! Looks like for best ET you could keep the rpm below 7500 rpm? What are the head flow numbers?

That is awesome!

No far from max type deal.

It's my small intake port and not the size or type of valve I would use for max effort deal.
Only 2.15" intake valve and they are steel.

This was as budget as we could be so as much as I could use from what he had I did.

Yes I think 7500 will be the shift point power is still good at 7500.

Did not flow heads but have done so many w9s they would be in the 360-370 range
Exhaust would be in the 250s

This has small 2.15 intake valve and exhaust valve with wrong shape.

45° valve seats. (Not what I normally use on w9) but locked into using valves and no margin to change seat angle.

What minimum & average CSAs does your "small" port have?

Any more details about the cam you can provide?

Take my money! Now!

Wow. Heck yes. I want a Ritter block too!

Another great SB build,

Nice Work Bret, would this power level work ok without the extra head bolts? I have a 59* R1 in my car with the extra bosses milled off.

Yea no problem
To get this power with the smaller bore your block will take have to go at it little different.

Nice!

Very cool. This raises the bar some.

Hmmmm... no response. Does this mean I'll have to ask you at Carlisle next year after you frisk me to make sure I'm not recording the conversation?

Also, you mentioned custom Icon pistons... as in directly from the manufacturer, or modified by someone else? Only asking because I thought they didn't offer anything except their stocking pistons.

Brett is pretty secretive. He will post up some jewelry on Facebook and then disappear. I made a comment about the deep valve pockets and he posted back he did that to lower the compression. I was kinda surprised by the sharp edges left and was always led to believe edges should be slightly radiased. Looks like a nice combo that won’t have to be shifted as high as some of the W9 stuff.

By the looks of the dyno numbers everything was just right 800 hp. On pump junk wow great job..

John,Brett is secretive because this is his bread and butter we are talking about. He does not live on Social Security Retirement and Pensions like us old farts.

No sharp edges on the pistons.

Yes I did just use my normal deep valve pocket that gets used on big effort engine ( I knew what the CC would be with in 1-2cc)

Correct icon is not in the custom piston business this set was done as a favor to me.
They really should get into the custom piston market they make a nice piston.

Sorry not talking about cross section of my heads 😉 Got told many times on here how wrong my stuff was.

But the CC of this port is 303 😀 If you Know the port length of a w9 you should be able to figure avrage cross section.

Cam specs are wrong in this engine I missed it trying to knock some cylinder pressure out of it. I did 😂 She only cranks 160lbs

I really would like to change the cam but it's not in the budget on this engine. Hope we can make some changes down the road.

Short list of some changes.

New bigger/better carb
Port the intake (was done poor when built by previous builder) but works better than I thought it would.
Crank trigger
Really think a vacuum pump would help power a good bit.
Better oil pan Just has street type milodon I would guess this is really hurting 4.125" stroke.

Those pistons look nice to me. Looks like they were polished after machining?

Yes they did that did not ask for it but they are darn nice piston.

Gonna be a nice little street motor.

Wow! Nice favor! Sweet looking slug. I remember gramps used to do this by hand in his engines. Chambers as well. A lot of work by hand.

Budget motor? (All things realitive....)

You’ll certainly pick up power with dropping the pan depth and vacuum pump. Over all, not for nothing Brett, I think between the lists changes, you’ll break a grand on the power Maori with all of them done. I don’t know what you did for a cam but at 160 psi for that mill at that power, when you get the new one in there it’ll be killer.

But since that cam is in there, I’d guess there is a reason.
I do have one question though! Does it have to be a pump gas engine? As per the engine owners request?

None the less, good job!

What is the story on the timing gear and chain set? Top gear looks like it is cast. With a 60mm cam setup I'd be expecting a lot of load and maybe a billet timing set or maybe a Jesel belt drive?

It's the gears they ran in craftsman trucks.
This thing has low load on that stuff.
275lbs seat pressure only .750" lift with 1.6 rockers roller cam bearings

Motor with plugs out takes 28lbs to turn over 😀

If he had the money for sure would have belt drive on it.

If it is okay for the Craftsman trucks then it should be good stuff. I've never seen that timing set before. I used the Pro Gear stuff when I was designing the billet front cover setup. I liked the look of the Pro Gear setup but I never ran it.