Here’s a nice sounding build

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pittsburghracer

pittsburghracer

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CALL THE SHOP FOR PRICING 937-708-8563--We have a new Small Block combo for sale--on our first shot this 422" small block made 730HP @ 7200 & 613 Torque @ 5700--it uses a short deck mopar perf R3 race block with 9.200 deck--4 bolt mains with 340 size--59 degree lifter angle--we have over 20 of these blocks in stock--it has 4.100 bore x 4.00 stroke-- Molnar Technologies 4.00/2.100 crank and 6.123/.927 H-beam rods-- Diamond Pistons 12.5 to 1--Indy 360-1 CNC 245 heads 2.10 x 1.650 63cc T & D Machine Products 1.6 rockers-- COMP Cams roller .740/.740--.274/.282--R106-- BAM Products Roller Lifters with .150 offset on intakes--Trend 3/8 pushrods--Indy 360-3R 1x4 w port match intake machined to fit the 9.200 block--Holley 950cfm carb--Msd dist--Melling HV oil pump-- Milodon 8qt oil pan with windage tray-- Driven Racing Oil 10w/30--730HP--613 torque--call the shop for info and pricing 937-708-8563

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It's nice to see Indy getting back in the game with a decent combo, they've sorta been in the game the last few years hanging by a thread.
 
Going by the deck height and connecting rod length along with half of the stroke, wouldn't the compression height be 1.077"? I looked up Diamond Pistons and didn't find any for this combo. Are they custom made?
 
Dan the man said:
Going by the deck height and connecting rod length along with half of the stroke, wouldn't the compression height be 1.077"? I looked up Diamond Pistons and didn't find any for this combo. Are they custom made?
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I would use a 3.79 type deal with that short deck, but they probably had a bunch of short deck blocks around they need to get rid of.
Yes, that results in a short custom piston. Nothing wrong with it in a race motor
 
This build is very similar to the 422 small block in my Arrow, except I'm using a 340 X block & W5 heads. Bullet cam .685/.682 275/284 with 1.5 rockers, 13.0 to 1 compression. Port matched and blended Indy 360 rectangular port intake with Thumper 1050ish Dominator. Be interesting to know what they want for this.
 
mygasser said:
almost certainly custom, yes.
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Just a question, isn't that short deck height kinda short for building a stroker motor? If I did the math right the pistons would be at zero deck height and that means no room for decking of the block if it would be needed. I would want a extra .250"-.375" that would help open up the use of different compression height pistons. I do understand that this is a race car, just saying
 
Dan the man said:
Just a question, isn't that short deck height kinda short for building a stroker motor? If I did the math right the pistons would be at zero deck height and that means no room for decking of the block if it would be needed. I would want a extra .250"-.375" that would help open up the use of different compression height pistons. I do understand that this is a race car, just saying
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Nothing wrong with a zero deck piston. Mine are at zero deck( flattops)
I suspect that is what the build is using. Probably somewhere around a 60cc head which would yield about 12.5 compression like stated in the build.
Yes, with a 9.200 deck you are really cramming the piston with a 4 inch stroke, but it will obviously work.
There are a few( I believe Molnar is one) that offer a 3.79 crank. Obviously won’t yield as many cubes, but imo, a better way to go. Probably still going to need a custom slug, so half dozen of one, half dozen of the other.
If I am not mistaken, think I have seen the use of a 3.79 crank even with a 9 inch deck.
Longer crank in this build won’t have to run it as many rpm’s to make power. So that is plus for a bracket deal.
 
B3422w5 said:
Nothing wrong with a zero deck piston. Mine are at zero deck( flattops)
I suspect that is what the build is using. Probably somewhere around a 60cc head which would yield about 12.5 compression like stated in the build.
Yes, with a 9.200 deck you are really cramming the piston with a 4 inch stroke, but it will obviously work.
There are a few( I believe Molnar is one) that offer a 3.79 crank. Obviously won’t yield as many cubes, but imo, a better way to go. Probably still going to need a custom slug, so half dozen of one, half dozen of the other.
If I am not mistaken, think I have seen the use of a 3.79 crank even with a 9 inch deck.
Longer crank in this build won’t have to run it as many rpm’s to make power. So that is plus for a bracket deal.
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I agree, there's nothing wrong with a zero deck piston. I don't know about stroker motors but it's the rpm's that it turns is kinda high for a long stroke long rod motor?
 
J
pittsburghracer said:
CALL THE SHOP FOR PRICING 937-708-8563--We have a new Small Block combo for sale--on our first shot this 422" small block made 730HP @ 7200 & 613 Torque @ 5700--it uses a short deck mopar perf R3 race block with 9.200 deck--4 bolt mains with 340 size--59 degree lifter angle--we have over 20 of these blocks in stock--it has 4.100 bore x 4.00 stroke-- Molnar Technologies 4.00/2.100 crank and 6.123/.927 H-beam rods-- Diamond Pistons 12.5 to 1--Indy 360-1 CNC 245 heads 2.10 x 1.650 63cc T & D Machine Products 1.6 rockers-- COMP Cams roller .740/.740--.274/.282--R106-- BAM Products Roller Lifters with .150 offset on intakes--Trend 3/8 pushrods--Indy 360-3R 1x4 w port match intake machined to fit the 9.200 block--Holley 950cfm carb--Msd dist--Melling HV oil pump-- Milodon 8qt oil pan with windage tray-- Driven Racing Oil 10w/30--730HP--613 torque--call the shop for info and pricing 937-708-8563

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John I called them today and the sales lady said it was $26,000
 
pittsburghracer said:
Wow. Makes me feel even better finding my R3 block, rotating assembly, and Indy heads for 7500.00.
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I was interested in this engine because it has the magnum motor mounts and would pretty much bolt right in my dakota. Except would have to change the oil pan to a rear sump.

Also I found out yesterday that I can buy a 6.4 hemi stroked to a 426 with a 3.0 Whipple supercharger, that makes 872 hp for $26,500
 
Dan the man said:
I agree, there's nothing wrong with a zero deck piston. I don't know about stroker motors but it's the rpm's that it turns is kinda high for a long stroke long rod motor?
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(Within realistic stroke and bore and rpm combinations)

Rpm capabilities aren't directly driven by bore and stroke. This is an old myth that's been dispelled.
 
Dan the man said:
I agree, there's nothing wrong with a zero deck piston. I don't know about stroker motors but it's the rpm's that it turns is kinda high for a long stroke long rod motor?
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I ran my W5 stroker right at 7500 through the traps for years. This was 4.100 bore/ 4 inch stroke and 6.300 compstar rods, I used to race a ton back then, points, etc, etc.
 
mopar65 said:
I was interested in this engine because it has the magnum motor mounts and would pretty much bolt right in my dakota. Except would have to change the oil pan to a rear sump.

Also I found out yesterday that I can buy a 6.4 hemi stroked to a 426 with a 3.0 Whipple supercharger, that makes 872 hp for $26,500
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So are you buying one. I’m not into power adder cars unless they are super fast and those engines don’t make good bracket engines. And I’m not into powerful street cars.
 
B3422w5 said:
Seems like a bunch, I was figuring more like 18-20 grand with the block, roller, T&D rockers, etc, etc.
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Thats what i thought too. but with the cost of everything way up. its probably right.
 
pittsburghracer said:
So are you buying one. I’m not into power adder cars unless they are super fast and those engines don’t make good bracket engines. And I’m not into powerful street cars.
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I would like to but that's a lot of money. lol but I do know how the saying goes. I was just comparing the gen3 hemi because the 422 with 730 Hp cost $26,000 or you could buy a stroked, blown gen3 hemi with 872 HP for $500 more. John, are you saying gen3 hemis dont make good bracket engines or blown Gen3 hemis dont make good bracket engines? I have never had a engine with a power adder. so i probaly dont know what i am talking about.lol
 
but i was trying to get BOOSTED to buy one and put it in Fread. lol
 
Mean416 said:
(Within realistic stroke and bore and rpm combinations)

Rpm capabilities aren't directly driven by bore and stroke. This is an old myth that's been dispelled.
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Not an old myth at all. A bigger engine is going to want more head, guarantee you a stroker will make max power lower in the rpm range than a stock stroke motor, assuming same head for both. Bigger motor will take less rpm to make its peak power.
For example the mountain motor pro stock stuff runs a couple thousand rpm’s less than the NHRA stuff, but they are faster in spite of that because of the bore and stroke difference. I believe they all use roughly the same head.
 
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