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Re: Andy, your 470/270TF indy 440-3 results [Re: Cab_Burge] #2716623
11/17/19 08:23 AM
11/17/19 08:23 AM
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flint michigan
mopar dave Offline OP
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Yep, I understand that too. Maybe the paracidic loss is in the longer stroke having too speed up the piston at a higher rate to reach full speed than the short stroke does. I dont know and I dont think we will ever know for sure how much more drag is there in the longer stroke. No way to see or measure it. I think it's just theory right, but it is interesting. Then again with a longer rod you would have more weight. Does one cancel the other out? Does the oil or lubes make all this a non issue?

Re: Andy, your 470/270TF indy 440-3 results [Re: mopar dave] #2716640
11/17/19 09:52 AM
11/17/19 09:52 AM
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So. Burlington, Vt.
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fast68plymouth Offline
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Here’s an example of how the $1675 for the manifold porting could be used in a different way.

You think the current heads are “too big”?

You can buy some std port stage 7’s(which is just a Victor head) from Mancini for $1300/pair with valves.
You can reuse all your current hardware and rockers. Headers will fit.
Sell your current heads and valves to finance some prep and porting....... and still have some left over.

Then you’d have std port heads, and that M1(or TF, or Victor) would fit just fine.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Andy, your 470/270TF indy 440-3 results [Re: fast68plymouth] #2716660
11/17/19 10:46 AM
11/17/19 10:46 AM
Joined: Apr 2003
Posts: 2,590
Tulsa, Oklahoma
340Cuda Offline
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What would be a typical Pro Stock Bore/Stroke/Rod Length?

As far as a NA engines I think that would be interesting. I would think once boost is added a lot of things become less important.

Re: Andy, your 470/270TF indy 440-3 results [Re: fast68plymouth] #2716661
11/17/19 10:47 AM
11/17/19 10:47 AM
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Posts: 6,384
flint michigan
mopar dave Offline OP
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That's a great idea Dwayne. I will keep that in mind as an option should I decide to sell these.

Re: Andy, your 470/270TF indy 440-3 results [Re: csk] #2716674
11/17/19 11:15 AM
11/17/19 11:15 AM
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flint michigan
mopar dave Offline OP
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flint michigan
I agree with that as well. I know this is all kicking a dead horse, but I was relating all this to foot braking. If trans brake I would think the bigger stroke might have the advantage as your already up on the power.

Re: Andy, your 470/270TF indy 440-3 results [Re: 340Cuda] #2716771
11/17/19 02:31 PM
11/17/19 02:31 PM
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Bend,OR USA
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Cab_Burge Offline
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I'm thinking 4.625 to 4.650 bore with close to 3.6 stroke and I have no idea on the rod lengths shruggy
I'm sure those motors never see below 8500 RPM at WOT after the clutch is let out until they let off the thottle shruggy


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Andy, your 470/270TF indy 440-3 results [Re: Cab_Burge] #2716777
11/17/19 02:49 PM
11/17/19 02:49 PM
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flint michigan
mopar dave Offline OP
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That would make a 489. Rpm is hp. Nice

Re: Andy, your 470/270TF indy 440-3 results [Re: mopar dave] #2716835
11/17/19 06:17 PM
11/17/19 06:17 PM
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Bend,OR USA
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Cab_Burge Offline
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How about 4.625 bore with a 4.650 or so stroke to make 500 C.I.?
I hear and see rumors about P.S. engine specs, me thinks you would have to be on a P.S. engine team to know the real specs work


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Andy, your 470/270TF indy 440-3 results [Re: Cab_Burge] #2716837
11/17/19 06:25 PM
11/17/19 06:25 PM
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flint michigan
mopar dave Offline OP
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that would be a 625 cab. a 4.7 bore with 3.6 stroke would be 500.

Last edited by mopar dave; 11/17/19 06:27 PM.
Re: Andy, your 470/270TF indy 440-3 results [Re: mopar dave] #2716896
11/17/19 08:00 PM
11/17/19 08:00 PM
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Bend,OR USA
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Cab_Burge Offline
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Originally Posted by mopar dave
that would be a 625 cab. a 4.7 bore with 3.6 stroke would be 500.
blush
I meant with the shorter stroke, 3.650 or so blush


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Andy, your 470/270TF indy 440-3 results [Re: csk] #2717896
11/20/19 05:26 PM
11/20/19 05:26 PM
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junction city oregon
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viperblue72 Offline
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junction city oregon
I believe the reason many 408sb/500bb aren’t running as they should is not the cubic inches.
It’s cylinder head limitation.
I have ran 408/410 small blocks and one 511bb. The one thing I can say is that I will never go back to stock stroke engines. It is still easier to go faster with more cubic inches.

Re: Andy, your 470/270TF indy 440-3 results [Re: viperblue72] #2718085
11/21/19 12:17 PM
11/21/19 12:17 PM
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flint michigan
mopar dave Offline OP
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I agree, more cubic inch is better, but seems it is better to get there with the bore. I think since the 530 blocks have less core shift than the earlier blocks maybe I could take the bore out further than the typical 4.375. Anyone know how far the 530 400 blocks can be bored and still have plenty of meat left in them? Can they go 4.500? 4.400? 3.91x4.500 is almost a 500ci, 498.

Last edited by mopar dave; 11/21/19 12:20 PM.
Re: Andy, your 470/270TF indy 440-3 results [Re: mopar dave] #2718112
11/21/19 01:47 PM
11/21/19 01:47 PM
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Bend,OR USA
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I've seen massive core shift in some of the 400 block castings I have tested, including both versions of the vaunted "230 and 530" blocks work
Have yours sonic tested by a good shop first before going bigger than 4.380 twocents
The thickest ones I can remember using had the thinnest major or minor cylinder wall thickness of around .160 somewhere from the top of the cylinder wall to the bottom of the water jackets before boring shruggy work
I would love to have a 400 block (I have two in stock now that need sonic testing luck) that had at least .220 before boring as the thinnest part of the cylinder walls shruggy work
I bought one 400 block from Andy F several years ago that only needed .007 clean up to get the bores straight, it was a cold weather early block that had been sonic tested. I retested with my Dakota 1000 sonic tester and the thinnest wall I found was above .160 up
I raced that motor four 4 or 5 yrs and took it out of the car last winter, I'm hoping to get it apart this winter to freshen it luck

Last edited by Cab_Burge; 11/21/19 08:16 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Andy, your 470/270TF indy 440-3 results [Re: Cab_Burge] #2718183
11/21/19 06:04 PM
11/21/19 06:04 PM
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Val-haul-ass... eventually
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BradH Offline
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I was thinking a typical 400 block would be extremely lucky to even go 4.390, much less 4.40++


An unskilled person with a "cool idea", a bunch of porting tools, and a set of cylinder heads is a sure recipe for disaster.
I AM that person!
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Tricycle kid: I don't know. Something amazing, I guess.
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Re: Andy, your 470/270TF indy 440-3 results [Re: BradH] #2718185
11/21/19 06:06 PM
11/21/19 06:06 PM
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Oregon
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AndyF Offline
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4.375 is often the end of the road. Sometimes you can hone them to 4.380 and get a little more life out of it. Maybe 1 out of 50 will be thick enough to go larger than 4.380.

Re: Andy, your 470/270TF indy 440-3 results [Re: BradH] #2718382
11/22/19 12:22 PM
11/22/19 12:22 PM
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State of confusion
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After my final hone at Pettis, mine ended up at 4.377 and w/good cyl. thickness left...........


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: Andy, your 470/270TF indy 440-3 results [Re: Thumperdart] #2718419
11/22/19 03:05 PM
11/22/19 03:05 PM
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Posts: 6,384
flint michigan
mopar dave Offline OP
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flint michigan
I see. I thought the 530 blocks were the good or should I say better blocks. My current 230 block had something like .115 on #1 thrust side before boring. It is now 4.375, but block is almost full of hard block. I'll run it til it breaks, then i'll build something alittle different. Thanks for that info.

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