Previous Thread
Next Thread
Print Thread
Indy Aluminum Hemi Block issues? #2820769
09/14/20 07:11 PM
09/14/20 07:11 PM
Joined: Feb 2005
Posts: 825
MI, Lapeer
M
maximus Offline OP
super stock
maximus  Offline OP
super stock
M

Joined: Feb 2005
Posts: 825
MI, Lapeer
I have the opportunity to buy a brand new early Indy Maxx 426 Hemi aluminum block and was wondering if there are any issues that I need to be concerned about. This is one made without the three ribs in the valley area. Has anybody used or had experience with these blocks? All machining had been done and is ready to assemble. Thanks

Re: Indy Aluminum Hemi Block issues? [Re: maximus] #2820777
09/14/20 07:32 PM
09/14/20 07:32 PM
Joined: Jan 2003
Posts: 8,735
MN
J
JERICOGTX Offline
master
JERICOGTX  Offline
master
J

Joined: Jan 2003
Posts: 8,735
MN
How much power are you planning on making?


69 GTX 68 Road Runner
Re: Indy Aluminum Hemi Block issues? [Re: JERICOGTX] #2820936
09/15/20 06:17 AM
09/15/20 06:17 AM
Joined: Feb 2005
Posts: 825
MI, Lapeer
M
maximus Offline OP
super stock
maximus  Offline OP
super stock
M

Joined: Feb 2005
Posts: 825
MI, Lapeer
Depending which route I take, natural or supercharged , the max would be 850HP. The sleeves are 4.375 diameter and have already been O ringed. As I stated above this is a new never used block.

Re: Indy Aluminum Hemi Block issues? [Re: maximus] #2820942
09/15/20 06:59 AM
09/15/20 06:59 AM
Joined: Jan 2003
Posts: 8,735
MN
J
JERICOGTX Offline
master
JERICOGTX  Offline
master
J

Joined: Jan 2003
Posts: 8,735
MN
That block will have no problems with 850hp.

Last edited by JERICOGTX; 09/15/20 06:59 AM.

69 GTX 68 Road Runner
Re: Indy Aluminum Hemi Block issues? [Re: JERICOGTX] #2821097
09/15/20 12:52 PM
09/15/20 12:52 PM
Joined: Aug 2003
Posts: 3,863
On the bumper
N
n20mstr Offline
master
n20mstr  Offline
master
N

Joined: Aug 2003
Posts: 3,863
On the bumper
IM making around 14-1500 with an Indy Maxx block. Been using it for well over 10 years and its been ok so far. Biggest things to look for, check all oil passages that they are drilled fully. Check crank clearance at the main bul;kheads, mine needed a little massage at the thrust. Other than that check for normal stuff, decks, linehone, etc. The other thing to get used to is the block will grow (valve lash) and the bores move around. But thats really normal aluminum block issues.

the more you ask, the more you will get both answers, It works well.......it sucks....LOL
Based on my experience its a good block


....BAD A$$ STREET CAR.....
Re: Indy Aluminum Hemi Block issues? [Re: n20mstr] #2821146
09/15/20 02:22 PM
09/15/20 02:22 PM
Joined: Jan 2003
Posts: 4,888
Chicago Blackhawks
H
hemicar1971 Offline
master
hemicar1971  Offline
master
H

Joined: Jan 2003
Posts: 4,888
Chicago Blackhawks
I agree n20mstr, the block will move around had that with a friends and his crank did rub on a journal from moving around a little or a lot. 850 is a good number to keep things together with a hemi. This Indy motor was well over 1300 hp.


1971 HEMI E BODY REGISTRY
Re: Indy Aluminum Hemi Block issues? [Re: maximus] #2821205
09/15/20 05:00 PM
09/15/20 05:00 PM
Joined: Feb 2013
Posts: 94
Canada
C
cuda499 Offline
member
cuda499  Offline
member
C

Joined: Feb 2013
Posts: 94
Canada
Horrible cooling, and horrible oil return. Besides that, great lol

Re: Indy Aluminum Hemi Block issues? [Re: cuda499] #2821224
09/15/20 05:42 PM
09/15/20 05:42 PM
Joined: Dec 2016
Posts: 653
Usa
A
A39Coronet Offline
mopar
A39Coronet  Offline
mopar
A

Joined: Dec 2016
Posts: 653
Usa
Originally Posted by cuda499
Horrible cooling, and horrible oil return. Besides that, great lol


Both of these issues can be solved by using an engine builder who's experienced in these blocks. I've seen some very creative solutions to additional cooling and oiling mods that solve these issues permanently.


Follow my G3 Hemi Barracuda build on Youtube
https://www.youtube.com/watch?v=XSDAWczXoZw&list=PLTus_wQu8POADHEeJNJp2nr4NMHEyB9EK

2015 Tri-State Stock Super Stock Champion
2017 Monster Mopar Pro Winner
2018 Monster Mopar No Box Winner
Re: Indy Aluminum Hemi Block issues? [Re: A39Coronet] #2821379
09/16/20 06:44 AM
09/16/20 06:44 AM
Joined: Feb 2005
Posts: 825
MI, Lapeer
M
maximus Offline OP
super stock
maximus  Offline OP
super stock
M

Joined: Feb 2005
Posts: 825
MI, Lapeer
I have been building my own engines for 40+ years. Does anyone know what kind of mods are they doing to improve cooling and oiling issues with these blocks?

Re: Indy Aluminum Hemi Block issues? [Re: maximus] #2821414
09/16/20 08:26 AM
09/16/20 08:26 AM
Joined: Aug 2003
Posts: 3,863
On the bumper
N
n20mstr Offline
master
n20mstr  Offline
master
N

Joined: Aug 2003
Posts: 3,863
On the bumper
Originally Posted by maximus
I have been building my own engines for 40+ years. Does anyone know what kind of mods are they doing to improve cooling and oiling issues with these blocks?


the only oil return mod i have, is both ends of the heads are tapped for oil return lines to the pan.


....BAD A$$ STREET CAR.....
Re: Indy Aluminum Hemi Block issues? [Re: cuda499] #2821446
09/16/20 09:25 AM
09/16/20 09:25 AM
Joined: Jan 2003
Posts: 8,735
MN
J
JERICOGTX Offline
master
JERICOGTX  Offline
master
J

Joined: Jan 2003
Posts: 8,735
MN
Originally Posted by cuda499
Horrible cooling, and horrible oil return. Besides that, great lol


First time I've ever heard of poor cooling in these blocks. Care to explain the problem?


69 GTX 68 Road Runner
Re: Indy Aluminum Hemi Block issues? [Re: cuda499] #2821561
09/16/20 01:08 PM
09/16/20 01:08 PM
Joined: Jan 2012
Posts: 2,050
Stuttgart, Arkansas
rickseeman Offline
top fuel
rickseeman  Offline
top fuel

Joined: Jan 2012
Posts: 2,050
Stuttgart, Arkansas
Originally Posted by cuda499
Horrible cooling, and horrible oil return. Besides that, great lol


What oil return? Ain't nothing coming back to that pan. Mine ran out of oil in around 30-45 seconds. Everybody says, oh you have to have an experienced builder to build it. Well why is that? Why can't Indy just make a block that the oil drains back like it's supposed to? Like every other block ever made in the world. It's not like them doing it their way is making it a better block. Good to see the previous owners of Indy gone.


2011 Drag Pak Challenger
Re: Indy Aluminum Hemi Block issues? [Re: maximus] #2821569
09/16/20 01:29 PM
09/16/20 01:29 PM
Joined: Jan 2003
Posts: 2,365
A shed in England
Tig Online content
top fuel
Tig  Online Content
top fuel

Joined: Jan 2003
Posts: 2,365
A shed in England
Originally Posted by maximus
I have been building my own engines for 40+ years. Does anyone know what kind of mods are they doing to improve cooling and oiling issues with these blocks?


I've seen extra holes drilled in the cam galley for oil return, I was unaware of cooling issues, it isn't a problem on ours.


'74 Challenger..9.46 and 145.9 so far. 4000lb!!!# N/A, 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 4:10's and 10.5s. Marsh Performance pump gas 655ci. 9.51 @142.4 with a 580 wedge
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 14.02 @ 97.95 Best Mph 98.5
Re: Indy Aluminum Hemi Block issues? [Re: maximus] #2821578
09/16/20 01:48 PM
09/16/20 01:48 PM
Joined: Jan 2012
Posts: 2,050
Stuttgart, Arkansas
rickseeman Offline
top fuel
rickseeman  Offline
top fuel

Joined: Jan 2012
Posts: 2,050
Stuttgart, Arkansas
Originally Posted by maximus
I have been building my own engines for 40+ years. Does anyone know what kind of mods are they doing to improve cooling and oiling issues with these blocks?


I looked for some photos of the oiling mods to help you out but I couldn't find any. I probably can't remember them all but I'll try. Big thanks to Todd Marsh and Ray Barton for helping me through that fiasco. First of all, all four of the holes in the block that drain the corners of the heads, were undersize from stock. So I had to order an extra-length drill bit of the proper size and drill them out. Next, there is no oil drain in the lifter valley, so I drilled holes down the middle of the lifter valley, the size and spacing that Todd and Ray told me. Then there is no escape for the oil to the front cover, so I used a hole saw and cut a 1" hole there with the bottom of the hole being flush with the lifter valley so it could drain there. I hope that was all of it.

I didn't notice a cooling problem in my very limited driving at the track.


2011 Drag Pak Challenger
Re: Indy Aluminum Hemi Block issues? [Re: rickseeman] #2821604
09/16/20 02:37 PM
09/16/20 02:37 PM
Joined: Aug 2003
Posts: 3,863
On the bumper
N
n20mstr Offline
master
n20mstr  Offline
master
N

Joined: Aug 2003
Posts: 3,863
On the bumper
???? OIL returning over the rotating assy cost you power. LOL
External drains in the ends of the heads to the pan and its all good...LOL


....BAD A$$ STREET CAR.....
Re: Indy Aluminum Hemi Block issues? [Re: n20mstr] #2821782
09/17/20 02:47 AM
09/17/20 02:47 AM
Joined: Jan 2003
Posts: 2,365
A shed in England
Tig Online content
top fuel
Tig  Online Content
top fuel

Joined: Jan 2003
Posts: 2,365
A shed in England
Originally Posted by n20mstr
???? OIL returning over the rotating assy cost you power. LOL
External drains in the ends of the heads to the pan and its all good...LOL

Very true but we didn't option lifter oiling so we need some drain back / splash for lube. Also I'm guessing with spray bars and a good scraper / windage tray HP loss is minimized. up


'74 Challenger..9.46 and 145.9 so far. 4000lb!!!# N/A, 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 4:10's and 10.5s. Marsh Performance pump gas 655ci. 9.51 @142.4 with a 580 wedge
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 14.02 @ 97.95 Best Mph 98.5
Re: Indy Aluminum Hemi Block issues? [Re: Tig] #2821790
09/17/20 05:10 AM
09/17/20 05:10 AM
Joined: Dec 2006
Posts: 4,386
aotearoa
rebel Offline
master
rebel  Offline
master

Joined: Dec 2006
Posts: 4,386
aotearoa
I have the low deck wedge version of this block. Never had a cooling problem but I did flare out the return holes in the front of the block, (i have reverse flow cooling), As for oil return I opened the holes up in the valley & chamfered them & had no issues with the wet sump. Now I have a dry sump set up, I have a pickup at the back of the valley & to date, haven't experianced any problems. I'm no pro engine builder, I'm just armed with a dremel & did what I thought was necessary. Had my block for over 10 years now, running in the mid 800hp range. I would buy another block no problem.

67411412_148805459537456_1859651814748585984_o.jpg
Last edited by rebel; 09/17/20 05:11 AM.
Re: Indy Aluminum Hemi Block issues? [Re: JERICOGTX] #2822346
09/18/20 04:33 PM
09/18/20 04:33 PM
Joined: Feb 2013
Posts: 94
Canada
C
cuda499 Offline
member
cuda499  Offline
member
C

Joined: Feb 2013
Posts: 94
Canada
By pour cooling, i mean in any car ive ran them, street or strip, they dont stay cold. One street car weight from barley being able to hold it down to 210, to needing a thermostat to stay at 180 with keith black block.... same car, same rads, same fan.

Yes the oil problem can be fixed, but i expected a better product.

Out of everyone commenting, who has bought one of these blocks, built a motor and ran it on the street ...... asking for a friend

Now with that being said, they are under new ownership and they have been making positive changes!

Last edited by cuda499; 09/18/20 04:45 PM.
Re: Indy Aluminum Hemi Block issues? [Re: cuda499] #2822807
09/20/20 06:21 AM
09/20/20 06:21 AM
Joined: Feb 2005
Posts: 825
MI, Lapeer
M
maximus Offline OP
super stock
maximus  Offline OP
super stock
M

Joined: Feb 2005
Posts: 825
MI, Lapeer
Would there be a problem running these blocks on the street for long periods of time? Issues with cooling and loose valve lash from thermo expansion of the aluminum as stated in above.

Re: Indy Aluminum Hemi Block issues? [Re: maximus] #2822873
09/20/20 10:30 AM
09/20/20 10:30 AM
Joined: Jan 2003
Posts: 17,840
Akron, Ohio
ProSport Offline
I Live Here
ProSport  Offline
I Live Here

Joined: Jan 2003
Posts: 17,840
Akron, Ohio
My street car has an all aluminum Indy 528 Hemi, I bought the car 85% complete so I have no idea what oil or cooling mods were done to it but I drive it every sunny day.
It has a solid roller cam and electric water pump and electric fans. 180 degrees all day long even in traffic.

20190406_145512.jpg

Sassy Grass street Duster, best of 10.69 at 124 driven to the track with 3.23 gears, naturally aspirated on 93 octane.






Powered by UBB.threads™ PHP Forum Software 7.7.1