Re: What is the max of an Indy Maxx block
[Re: 590 Challenger]
#2038396
03/25/16 12:01 PM
03/25/16 12:01 PM
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Joined: Oct 2004
Posts: 3,097 back in Georgia
dthemi
master
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master
Joined: Oct 2004
Posts: 3,097
back in Georgia
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From personal experience building NA motors with the older, less supported blocks. Over 1000 hp they started falling off for no reason. The first one I used made just under 1200 on the 3rd pull. Next few pulls power went down, and down. Thought something was hurt, but could find no evidence. Ripped it apart, re honed it, and power came up, then fell again. Finally attributed it to unsupported cylinder walls. Eventually settled in at a lower number and stayed close to it. Same experience with 3 different motors.
I have seen guys with blown motors making 1500+ with them. I don't think they're going to fly apart or anything like that. Just not as strong where it counts for power.
I have heard, but not personally seen, the later blocks that supposedly are better supported in the walls. Reality in my mind is there is only so much that can get around the rings, so if you need more power, just turn the blower harder.
The KB's are for sure the best cast option out there for strength, but you need the patience of a saint to get one. Should Noonan get an available billet water block out there, game over for every other racing mopar block maker.
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Re: What is the max of an Indy Maxx block
[Re: Gary Robbins]
#2038668
03/25/16 07:26 PM
03/25/16 07:26 PM
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Joined: Jan 2015
Posts: 493 Parts unknown
590 Challenger
OP
mopar
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OP
mopar
Joined: Jan 2015
Posts: 493
Parts unknown
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I've cracked one from nitrous at around 1400hp(started leaking water into the cylinder)...Indy said they have a thin sleeve & thick sleeve version(?)and I went back with the thick sleeve one as evidently I had the other...Really not sure about the block difference but info came direct from Indy !! That is the later block, mine dose not have the webbing in the lifter valley. I'm shocked it broke at 1400, I had water in the oil issues before, now I run no water. I'll check it out better
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Re: What is the max of an Indy Maxx block
[Re: fbs63]
#2038669
03/25/16 07:28 PM
03/25/16 07:28 PM
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Joined: Jan 2015
Posts: 493 Parts unknown
590 Challenger
OP
mopar
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OP
mopar
Joined: Jan 2015
Posts: 493
Parts unknown
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What Indy meant was they have 2 different sleeve OD sizes. One they use for up to 4.440 bore and one they use to 4.500 bore. Why they would use different sleeves is beyond me. Just put the 4.500 bore sleeve in and start at 4.350. Let the customer decide the bore size and have a thicker sleeve wall at smaller bores. More cylinder stability. If I was you at that HP level I would use a cast solid block minimum. IIRC Big Time Bob with the orange procharged Dart broke a Indy water block. Might want to PM him here or on YB. I'll try to contact him to see how hard he was pushing it, thanks
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Re: What is the max of an Indy Maxx block
[Re: FastmOp]
#2038672
03/25/16 07:32 PM
03/25/16 07:32 PM
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Joined: Jan 2015
Posts: 493 Parts unknown
590 Challenger
OP
mopar
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OP
mopar
Joined: Jan 2015
Posts: 493
Parts unknown
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I run a -1 big wedge at 30 psi with a single turbo on a max block. So far so good.
Run what you have for now. You should be around 150 mph in the 1/8 if you make a solid pass. You will find plenty of things to replace before you get to the block. Thanks that's good news. I was thinking about leaning on it harder, a third of my class is hitting 165-175 in the 1/8. Baby steps I guess
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