1996 Ram 1500 Sport 1968 road runner 1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
Re: Would like some advise on 2 different Hemi blocks
[Re: gsmopar]
#2910071 04/14/2101:07 PM04/14/2101:07 PM
I bought the first set of Indy 426SR heads that Indy CNCd. I wasn't to impressed and sent them to Modern Cylinder Head to have them ported. I requested they flow them before and after. On a 4.32 bore they flowed 361.2@.800. Jeff never did port them, he finally did a bowl blend and valve job. They then flowed 386.2@.800. The heads were 210 CC's on the intake port as delivered from Indy and measured 213cc's after Jeff sent them back to me. I bought a set of Indy Hi-Po heads, they feature a 2.4" intake valve and the I take port measures 266cc's. I had them flowed locally and the intake went 443 corrected@.700. (his bench couldn't do them at .800). IMO the Hi-Po heads will make at least 100 more hp than my 426 SR's but for my current package they aren't a very good fit. They have poor port velocity down low and my torque numbers suffer drastically. They want lots of rpm to work and the hp peak was north of 7000.
That's on a 600+ CI combination using very long intake runners as well. Food for thought. Whatever Dave tells you, you can take it to the bank.
Rich H.
Esse Quam Videri
Re: Would like some advise on 2 different Hemi blocks
[Re: ZIPPY]
#2910138 04/14/2103:16 PM04/14/2103:16 PM
I bought the first set of Indy 426SR heads that Indy CNCd. I wasn't to impressed and sent them to Modern Cylinder Head to have them ported. I requested they flow them before and after. On a 4.32 bore they flowed 361.2@.800. Jeff never did port them, he finally did a bowl blend and valve job. They then flowed 386.2@.800. The heads were 210 CC's on the intake port as delivered from Indy and measured 213cc's after Jeff sent them back to me. I bought a set of Indy Hi-Po heads, they feature a 2.4" intake valve and the I take port measures 266cc's. I had them flowed locally and the intake went 443 corrected@.700. (his bench couldn't do them at .800). IMO the Hi-Po heads will make at least 100 more hp than my 426 SR's but for my current package they aren't a very good fit. They have poor port velocity down low and my torque numbers suffer drastically. They want lots of rpm to work and the hp peak was north of 7000.
That's on a 600+ CI combination using very long intake runners as well. Food for thought. Whatever Dave tells you, you can take it to the bank.
I think I remember reading that when I was in the process of putting mine together. I don't have anything to compare it too (other than my old wedge), but the car can do a rolling burn out in any gear on the street. It went 10.13 with only 32 degrees of timing on the first shake down pass in 100 degree Arizona heat.
Re: Would like some advise on 2 different Hemi blocks
[Re: gsmopar]
#2910181 04/14/2104:54 PM04/14/2104:54 PM
If Pro Stock wanted to use aluminum blocks they would get it. They don’t want them. They want as much nose weight as they can get (within reason) and an aluminum block block won’t help that.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
Re: Would like some advise on 2 different Hemi blocks
[Re: madscientist]
#2910203 04/14/2106:11 PM04/14/2106:11 PM
If Pro Stock wanted to use aluminum blocks they would get it. They don’t want them. They want as much nose weight as they can get (within reason) and an aluminum block block won’t help that.
Pro stock also has a min weight, which im sure all the drivers are at..... So its known that a steel block will make more power then a cast alum block.... so if you made min weight with a steel block..... that would be the best of both worlds right???????
Re: Would like some advise on 2 different Hemi blocks
[Re: cuda499]
#2912498 04/20/2106:44 PM04/20/2106:44 PM
Called FHO today as someone suggested I should. He tells me to stay away from the Bill Mitchell block 088515. Not what I thought it was. I’m now looking at the Callies cast iron Hemi block and the KB aluminum. It’s looking like the aluminum KB block is a better direction and most of the machining is done. The Indy Maxx block looks to be a nice block as well but needs lots of machining adding another 800-1000 bucks bringing it up to the price of the KB. Thinking real seriously about the KB now. I really don’t want to add all the weight of the Callies block to the front of my car. Thanks for the info guys.
Facebook market place has a NOS Keith black Aluminum Hemi water block listed 4.500 bore seller name is Tom James Price may be a little stupid but not many around
Re: Would like some advise on 2 different Hemi blocks
[Re: RATTRAP]
#2913380 04/22/2112:14 PM04/22/2112:14 PM
I searched every way I could think of and can’t find that add. I would rather get the block from fho anyway because I want all the machining done when I get it. Gonna order the cp pistons from him as well. Thanks
Here we go again. Just spoke with Ray Barton and he had nothing negative to say about the Bill Mitchell block. It comes down to who you want to believe and what you want to believe. Also wants to sell me a head with the 2.25 valve. Says it’s all that’s needed. Gonna have to start another thread Tim Banning vs Ray Barton.
We are pulling my friends 604 out of his RR. It is a pump gas motor built in his garage and went on the Dyno the one FHO uses and John Owns. World Aluminum Block, it has Banning ports Stage V Streets heads nothing special with the valves I believe it is a 640 lift roller and factory wide pad rockers. It made 830 HP on the Dyno can not remember the Torque this was years ago maybe 15, Intake is a Stage V with Eddies. Only reason for pulling the motor is it is going to be upgraded and used in a race car being built so wanted to put about another 150 250 HP in the motor. Also have a New KB in the garage and it looks like a work of art. It is the raised big cam block 604 and will be built with FHO Mil. Stage V ported heads by Banning. This motor will take the place of a iron block motor 572 in another race car and will save a ton on weight. I like the new KB block either one of them and they are super nice machining and have lot of options. Price is not for the faint of heart but goes with the product.
1971 HEMI E BODY REGISTRY
Re: Would like some advise on 2 different Hemi blocks
[Re: mopar dave]
#2913568 04/22/2107:00 PM04/22/2107:00 PM
Here we go again. Just spoke with Ray Barton and he had nothing negative to say about the Bill Mitchell block. It comes down to who you want to believe and what you want to believe. Also wants to sell me a head with the 2.25 valve. Says it’s all that’s needed. Gonna have to start another thread Tim Banning vs Ray Barton.
What do you care which flows more.. you said it already... your building Hemi show poodle You said you MIGHT take it to the track once to see what it might run
Re: Would like some advise on 2 different Hemi blocks
[Re: MR_P_BODY]
#2913584 04/22/2107:27 PM04/22/2107:27 PM
Yes, but I do want it to run better than my wedge and with this kind of investment want to do it right the first time. Not time to get sloppy just throwing this together. Looking for 850-900 true hp. Dave Dudek says it can be done with my combo.
Nice block, I ordered the heads from Tim at FHO and will be ordering the KB block soon. He suggested that i order the block with raised cam and 60mm. Wants me to run timing belt with this combo as well. I will be calling him back next week.
When a chain is used guys I know do not like the harmonics in the motor. The Belt Timing seems to eliminate this. You would have to study what KB is the best for you. The KB I posted will see only track time and will only use around a 850 lift cam. Others in the area use an Inch lift this is one reason why the Cam shaft is so big when you run such huge spring pressure.
1971 HEMI E BODY REGISTRY
Re: Would like some advise on 2 different Hemi blocks
[Re: hemicar1971]
#2923368 05/17/2107:36 AM05/17/2107:36 AM
Yes, that's the way i understand it. I'm thinking 700-750" lift and the 60mm cam should have no twist at that. I'm pretty much just following Tim's lead.