So, on a 472, are chp-VT61 rockers good ?

Roger that and a big 10-4. Still out here in Orlando working some Z-14 mainframe performance issues, and have to hit Daytona on Friday. When I get back to Sacto, I will order up the cam, and start looking for the best forged pistons and H-Beam rods.

Thanks again,
Brother Roy
 
So, the cast iron heads went 415 MPH on the salt, and none of the Aluminum Alloy heads have ever been over 400... Must be a reason for that. This is why my 472 will run the Cast Iron heads. I also wonder if I should have the combustion chambers coated with VHT or Jet-Hot coating. ?? Seems like coatings on pistons and the combustion chambers will help keep the heat and power in the right place. I also will run the HD iconel Exhaust valves in the Pro-Comp heads just in case I go twin turbo with the 88mm mirror image Turbos from NRE.
 
There are distinct advantages to iron heads as you said. So far all the big power Cadillacs have run iron heads

But still they made 2400 + with a flat tappet cam and iron. !!!

How to put this.
Courtney told me to tell the trans guy that with 1500hp a Cadillac will make around 2000 ft lbs hahahaha

Imagine that at 2400 or 3000hp

Even the new Flash motor is still iron heads for now anyway

I would ask Courtney about coatings .
I have talked to him about coating bearings and he said they haven't been able to prove a advantage in their testing.

It's also a coincidence he just told me he dosent understand why more people dont build 472..he said not only do they make great power too the crank is stronger and in fact onto of the extra overlap the bearings have it has counterweights that run straight up from the mains like the 094 crank ..so it is like a 094 on steroids
 
Last edited:
The new Flash is to get several different combos. Test packages I guess you could call it that's once he manages to get the power it makes now to the ground ..
It will increase hahaha

Basically
They just haven't got to put the Alum heads on them yet is all. Partly cause so far there isnt a need ...
 
Oh Roy the 415 passes were with a 484

The really big power motor is waiting on a sponsor for the car..
 
Last edited:
As people start to realize the 472 crank is stronger, and has a better rod ratio, I will bet we see more and more high HP 472 monsters.

Go team go,
Roy
 
Roy Heisenberg said:
As people start to realize the 472 crank is stronger, and has a better rod ratio, I will bet we see more and more high HP 472 monsters.

Go team go,
Roy
Click to expand...
OH! You already knew this? Then why didn't you chime in with info?:sneaky:o_O:confused::unsure::whistle:
 
Bingo. And to top it off, I have never seen a 472 crank break. Stronger cranks are also easy on the bearings too. Bottom line - 472 can put you in the 700 HP club, and I am set to build a good example by mid-2019. Once I prove it on Project 472 iron head, then I will chime in a bit louder.

Best regards,
Bro. Roy of The 472
 
I haven't seen a 500 crank break either. Furthermore, I haven't seen a lot of other cranks break unless they have been put under EXTREME abuse! Cast, Nodular iron, or forged!

Bro S
 
It happens.. when it does it's like the chicken and the egg makes a mess..

In all but the extreme power motors the 093 crank is plenty strong..

Here is what Courtney's theory on what happens ..

With no extra support at around 800 hp the main caps start to flex. Then the main bearings start to get pinched ..that cuts off oil..when the bearings start to go the crank can flex ... nodular iron isn't very flexible. ..the crank breaks and ...

Biggest thing is reinforcing the caps..
If they flex to much all bets are off
Cap straps.. and when combined with Halo and studs make a huge difference

Either crank is extremely strong just in a all out effort the 472 is stronger period
 
Mondello has them. I had asked some years ago about them like $900..
That may have came down ..

Walker at Mts posted many times that mixing block and cap material was a bad idea yet the Mts 3 main girdle does just that

So i don't know. It seems it would be better I don't know if the other Cad vendor has them?

I made my straps made out of cold rolled not the best option. 4340 or something like that and I woido say they would be stronger than just a billet cap. Unless the billet cap is thicker than a stock cap

I am not sure what CH used for straps on my 518... the halo is a burnout piece so it's not cold roll for sure

Basically Cadco has 3 girdle setupz.

Halo
Cap strap and halo
4 bolt main conversion all 5 main 1" thick 4340 girdle
Or did he say 1 1/2"
 
Last edited:
Those are all “battle tested” solutions for sure, however the reason I ask about billet mains is for that small percentage of us running an eldo transmission, which the normal solutions won’t work.

Thanks for the info about the various vendors, that will truly come in handy.
 
Red98422 said:
Those are all “battle tested” solutions for sure, however the reason I ask about billet mains is for that small percentage of us running an eldo transmission, which the normal solutions won’t work.

Thanks for the info about the various vendors, that will truly come in handy.
Click to expand...

Red98422,

Your clearance problem comes from the lack of downward depth needed for the cross-axle of the Eldo. Well, I have the very same issue with an AWD front differential and half-shafts. If I try to move the entire engine drivetrain upward to allow for all of the extra crank supports, then the engine would be pushing through the hood and the 4 inch setback would find the valve covers poking above the dashboard. Not a good look! There are limitations to every application.

Jus sayin'

d
 
Last edited:
My bad bro D,
I didn’t even think about that. I guess my thoughts were focused on my specific application. I suppose there are quite a few others that could benifit from billet mains if they are in fact a solid solution.

I don’t know what the benifits of various metal billets are, just something that would resist cap flex better than the stock caps would be nice.
 
Cad Man said:
It happens.. when it does it's like the chicken and the egg makes a mess..

In all but the extreme power motors the 093 crank is plenty strong..

Here is what Courtney's theory on what happens ..

With no extra support at around 800 hp the main caps start to flex. Then the main bearings start to get pinched ..that cuts off oil..when the bearings start to go the crank can flex ... nodular iron isn't very flexible. ..the crank breaks and ...

Biggest thing is reinforcing the caps..
If they flex to much all bets are off
Cap straps.. and when combined with Halo and studs make a huge difference

Either crank is extremely strong just in a all out effort the 472 is stronger period
Click to expand...
Like I said. In EXTREME cases. No prep for the extreme, yes they will break. Just a basic fact of nature. If you build the bottom end for the extreme { not for fuel } . You shouldn't have a problem. Over build the bottom.
That sounds weird.

Bro S.
 
I keep forgetting your car ain't the
usual hahahaha..


Depending on clearence..
If limited to say less than 3/4 more of pan depth ..

You can make your own straps out of cold rolled steel .. then have them heat treated to 58-62 rc... they will be brittle but strong
as heck ..

It has been a while since i was a bench hand in machine shop. 100 years ago.

I think 8620 steel ..
Much better than 1018

4340 is plenty tuff as is
 
Well I’ll be doing more research then Ha! it never ends!

Thanks for the info on the various treatments of steel. And when the time comes I’m sure I’ll end up with more questions.
 
So, my old buddy LeeRoy was a machinist in the Navy, and now he does high performance engine machining on race cars. He says the cast iron caps on a cast iron block are sweet because all the iron expands at the same rate as the block heats up. He says Steel main caps can be a bitch because they expand at a different rate... If I have a guy copy a set of 472 main caps in 300M alloy, then heat treat, and then cryo-treat, I would have a fancy set of main caps to go with my ARP main studs on my new 472. Anyone know if the rate of expansion on 300M steel is close to the rate of thermal expansion on Caddy 5200 iron blocks?

Regards,
Roy who dances with 472
 
Back
Top