aluminum indy maxx water block pros and cons

[biomedtechguy]

well you've seen it before Bio but here it is again, 720ftlbs@4400 at 3800lbs

YES! Thanks, again for your reply!
I remember it seems that you were working on improving track times.
I'm liking the daylight under the front tires, and I've had subframe connectors, torque boxes, and leaf spring mount reinforcement plates all welded in to prep my Roadrunner for that. Strange Engineering took care of chromoly steel everything from the slip yoke to the pinion yoke, 1350 solid U-joints, caps, driveshaft, and a safety loop in case any of that should fail. I have to see what kind of roll cage is required based on time and speed, but I'd imagine a 4 or 6 point would be required. I may do that after the engine goes in. The Passon 855 has been promised to take 700 ft lbs continuous torque, and I've been told that is conservative. McLeod RXT dual disc clutch was recommended by McLeod, and they are aware of the HitMaster launch control, thus the 1,000 horsepower rated RXT vs the 700 HP RST, because the friction material is ceramic/metallic in the RXT vs organic for the RST. The clutch is broken in, and I believe my issues I was having with it behaving as though it was not fully disengaging seems to have resolved itself.
Here's an article on a "Torque Monster" build Hot Rod Magazine covered with Indy Cylinder Heads years ago, and it is a coincidence that the displacement is basically the same that I've planned at 541 cu in.
https://www.hotrod.com/articles/mopp-0004-plymouth-roadrunner-torque-monster/

 

[biomedtechguy]

Although written in April 2000, so 20 years ago, I believe for my application the only thing that has changed is I have more ready made, widely available, and possibly less costly parts, systems, and components available for my build, like stroker cranks already set up for the 4.25" stroke I'm planning, and the use of
BB Chevy rods. 2.200 rod journal, 0.990 piston pins is something that has been done many times now. Trick Flow 270s are available now, and the ModMan 6bbl intake with the ports CNC'd to Max Wedge size is something that Indy offers, last price I saw was an extra $100.
Here's something from the article that reads EXACTLY like I have been thinking in planning this engine:
The Holley Performance Products Project Roadrunner would be a street car. Sure, it might do a quarter-mile once in a while, but primary use would be cruising-even long distance Hot Rod-style Power Touring. This Roadrunner would be four-speed shifted backed up by the stoutest Hemi A833 possible, yet produce enough torque that you could basically leave it in Third all the time.

 

[Budnicks]

Not to hi-jack his thread,
BUT;
let stay on topic here

this is about Aluminum blocks the differences & pros & cons
advantages & disatvantages

 

[biomedtechguy]

Not to hi-jack his thread,
BUT;
let stay on topic here
this is about Aluminum blocks the differences & pros & cons
advantages & disatvantages

You're right, sorry. I get carried away. No harm intended.

 

[Budnicks]

You're right, sorry. I get carried away. No harm intended.

 

[Hemirunner]

FWIW, the BMP blocks are already in use at the 2,000 HP plus range. <snip> To do anything else would ruin my intent for my car, although some may say 700 ft lbs is going to be hard to wrangle.

Here’s mine on 92 octane and 14ish psi and 3 bad exhaust valve seats.

 

[biomedtechguy]

Here’s mine on 92 octane and 14ish psi and 3 bad exhaust valve seats.

View attachment 1096803

Wow, "handicapped" and it's making basically 900 horsepower and 868 ft lbs torque!

What block??

 

[Hemirunner]

Wow, "handicapped" and it's making basically 900 horsepower and 868 ft lbs torque!

What block??

It’s the World Products aluminum block. We didn’t even get to spin it over 5600rpm.

 

[biomedtechguy]

It’s the World Products aluminum block.

The "new" one I assume (announced in 2019, made available in 2020), and since it's the thread topic, I am not reading you having any block problems, but 3 bad exhaust valves. What was the problem there, and is that why you kept the RPMs down or would it go higher if it was healthy?

 

[Hemirunner]

The "new" one I assume (announced in 2019, made available in 2020), and since it's the thread topic, I am not reading you having any block problems, but 3 bad exhaust valves. What was the problem there, and is that why you kept the RPMs down or would it go higher if it was healthy?

Old one, purchased in 2014. No block problems. Turbo car which means lots of exhaust heat, plus losing coolant in the motor (Water pump) caused them to warp. We didn’t rev any higher because of the waste gate springs. Once they open, it was dumping boost hard. We didn’t have the boost control working. We were just dialing in the tune rather than looking for peak power. It’s a great street combo but not so great for racing.

 

[440rb]

Not to hi-jack his thread,
BUT;
let stay on topic here

this is about Aluminum blocks the differences & pros & cons
advantages & disatvantages

Yep sorry guys, ours is a Mega Block.