360 Stroker Combo Build Questions

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ocdart

ocdart

Inland Mopars Car Club
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My '69 Dart came with a new 380HP 360 Mopar crate engine when I bought it a couple of years ago. I've been collecting parts since then and hope to get it together and on the road in 2010.
I planned on going through the crate motor anyway to verify all is to spec. Now I'm thinking of maybe a head change and possible stroker build using the same cam that came with the motor. From other threads I've seen the Mopar hydraulic roller cam was Mopar # P4876348. The Mopar advertised Duration is 288/292 with the .050-duration being 230/234. Lift is .501 on the Intake and .513 on the Exhaust using the stock 1.6 rockers. Center Line is 108 and Over Lap is 74-degrees.
Planning to use either 750 or 850 cfm annular vacuum secondary carb.

OK guys. Here's my questions for those of you with new batteries for your 'engine-build' crystal balls:
* What kind of HP/Torque numbers do you think if I may get if I go with a set of Indy MAX heads with 2.02-dia. intake valves and boost the compression to 10:1 from the existing 9:1?
* Go with the above heads and a 408ci stroker kit?
* Go with the above heads and a 426ci stroker kit?
* Go with the above heads and a 440ci stroker kit?

I know this is all 'crystal ball' guessing. Kinda looking for best bang for the buck. Car is going to be a weekend car with a trip to the strip maybe 2-3 times per year.
Other planned mods are 727 reverse manual shift trans, 8-3/4 Sure-Grip with either 3.91 or 4.10 gears with a gear-vendors overdrive for semi-comfortable freeway cruising.

Again, still in planning stages but only want to build one-time the right way.

Thanks for you input!!!
 
ocdart said:
My '69 Dart came with a new 380HP 360 Mopar crate engine when I bought it a couple of years ago. I've been collecting parts since then and hope to get it together and on the road in 2010.
I planned on going through the crate motor anyway to verify all is to spec. Now I'm thinking of maybe a head change and possible stroker build using the same cam that came with the motor. From other threads I've seen the Mopar hydraulic roller cam was Mopar # P4876348. The Mopar advertised Duration is 288/292 with the .050-duration being 230/234. Lift is .501 on the Intake and .513 on the Exhaust using the stock 1.6 rockers. Center Line is 108 and Over Lap is 74-degrees.
Planning to use either 750 or 850 cfm annular vacuum secondary carb.

OK guys. Here's my questions for those of you with new batteries for your 'engine-build' crystal balls:
* What kind of HP/Torque numbers do you think if I may get if I go with a set of Indy MAX heads with 2.02-dia. intake valves and boost the compression to 10:1 from the existing 9:1?
* Go with the above heads and a 408ci stroker kit?
* Go with the above heads and a 426ci stroker kit?
* Go with the above heads and a 440ci stroker kit?

I know this is all 'crystal ball' guessing. Kinda looking for best bang for the buck. Car is going to be a weekend car with a trip to the strip maybe 2-3 times per year.
Other planned mods are 727 reverse manual shift trans, 8-3/4 Sure-Grip with either 3.91 or 4.10 gears with a gear-vendors overdrive for semi-comfortable freeway cruising.

Again, still in planning stages but only want to build one-time the right way.

Thanks for you input!!!
Click to expand...

If you go with the Indybrock heads, you can have them ported later...10:1 is a good choice.
I would use a 4" crank and be done. I use Scat cranks and I beam rods...lighter bobweight and all the reliability you need.
I would use at least 240 @.050 on the intake and 250 on the exhaust and with 1.6 rockers you can get .600 lift pretty easy.
If you use a tall gear then go with the rpm intake, if you use a low gear use a super victor intake.
When your done maybe bring it down and we'll dyno it. I know Louis aka maddart is glad he did!!
 
ou812 said:
If you go with the Indybrock heads, you can have them ported later...10:1 is a good choice.
I would use a 4" crank and be done. I use Scat cranks and I beam rods...lighter bobweight and all the reliability you need.
I would use at least 240 @.050 on the intake and 250 on the exhaust and with 1.6 rockers you can get .600 lift pretty easy.
If you use a tall gear then go with the rpm intake, if you use a low gear use a super victor intake.
When your done maybe bring it down and we'll dyno it. I know Louis aka maddart is glad he did!!
Click to expand...

How good are the cast stroker cranks?
 
The only problem with the crate engines that are Magnum head based could be (IDK 4 sure) are the blocks not being able to feed "LA" style cylinder heads with oil.

Is this the case with the blocks? If so, cylinder head selection is limited. I feel the Edelbrock head (Magnum style) will take care of most street and street strip duty engines.

I like ou812's suggestions.
 
ocdart said:
Mopar 440ci smallblock crate motor. 540hp, 550lbs/ft.
Here's the link:
http://www.bouchillonperformance.com/P5153523.asp
Click to expand...

Pretty sure that would have to be an aftermarket block. Someone correct me if I'm wrong. I have a .040 over factory 340 block with a 4.082 bore that has some pretty thin walls after sonic check. I'm thinking the walls would be see through at a 4.180 bore on my block.
 
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