6.0 w/ Radix help
10-02-2004 | 08:44 PM
#31
Originally Posted by ChevyCoonass
I see you made it back down south ... weren't you the guy in Monroe at one time?
My wife just graduated from pharmacy school so we're back.[/QUOTE]
Im sure your missing Monroe. I sure do, LOL.
10-02-2004 | 08:48 PM
#32
If you want, go ahead with the 6.0 swap. If you don't want to buy a full set of heads, stick with the stock 6.0 heads. The lq4 has 9.4:1 compression stock, and that will be just fine for the RADIX. If you leave the stock cam in there, I think that the 2.7" pulley might be OK to run, with some tuning of course. That might get you up to 10psi or so, but no doubt it will be putting down some power.
For what you're wanting, I really don't think you would like the centri blowers. It sounds like you're wanting something that's just a blast to drive and very streetable and reliable. Most of the ATI owners in the truck section will tell you, they wish they would have gone with the RADIX to start with.
For what you're wanting, I really don't think you would like the centri blowers. It sounds like you're wanting something that's just a blast to drive and very streetable and reliable. Most of the ATI owners in the truck section will tell you, they wish they would have gone with the RADIX to start with.
I hope that was sarcasm. 
10-02-2004 | 09:25 PM
#35
Thread Starter
On The Tree
Joined: Feb 2003
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From: Lake Charles, Louisiana
Flyer, the point is that I was just going to buy a block. That is it. A block and pistons, and take the crank and rods and everything else off of my 5.3L. Now if I need the 6.0 heads, would I be better off buying a whole motor or not really?
If I do buy just heads, should I get stage 1 or 1 1/2 heads? Or will that make less boost than 10psi?
Do you understand about me having to buy heads now? Has anyone here just converted their 5.3L to a 6.0 with just a block and pistons? Allen at FMS said that is all you have to do. Is he right???
If I do buy just heads, should I get stage 1 or 1 1/2 heads? Or will that make less boost than 10psi?
Do you understand about me having to buy heads now? Has anyone here just converted their 5.3L to a 6.0 with just a block and pistons? Allen at FMS said that is all you have to do. Is he right???
10-03-2004 | 12:05 AM
#36
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From: LA
Originally Posted by ChevyCoonass
So am I just screwed? Do I have to buy heads also for the 6.0 swap? Allen at FMS told me that EVERYTHING would bolt on! He also told me that he could get 10 psi from a Radix with that set up. Is he misunderstanding something maybe? It sounds hard to get 10psi with that high compression like you said it would be.
Then how about this thought. Maybe get a procharger since it is a little cheaper, and since people say that it makes power higher in the rpm range, maybe the higher compression from the 5.3 heads will give me more torque for pulling until the procharger's boost kicks in? Does that make sense?
By the way, I definately do not want to get rid of my Yank 3000. I tow sometimes and it feels plenty loose. I just read alot of Procharger threads, and they all say to get a real high stall. It picks up power way late. Everyone seems like they want Radix,Radix,Radix....... But with that high compression ratio, and the smallest pulley, how much boost would I get on the 6.0? Or am I stupid not to buy heads also? To lower compression? Please help
Then how about this thought. Maybe get a procharger since it is a little cheaper, and since people say that it makes power higher in the rpm range, maybe the higher compression from the 5.3 heads will give me more torque for pulling until the procharger's boost kicks in? Does that make sense?
By the way, I definately do not want to get rid of my Yank 3000. I tow sometimes and it feels plenty loose. I just read alot of Procharger threads, and they all say to get a real high stall. It picks up power way late. Everyone seems like they want Radix,Radix,Radix....... But with that high compression ratio, and the smallest pulley, how much boost would I get on the 6.0? Or am I stupid not to buy heads also? To lower compression? Please help
Rocky,like I explanied to you on the phone..Your current heads will "bolt-up" to whatever you want. If you use your 5.3l heads "as-is" on a flat top pistons,yes you will have more CR than what you need.You get dish pistons and\or open the combustion chambers to what CR you desire(8.5-9.5) The biggest thing with these guys,they don't know what exactly I will be doing during the buildup to give you proper info. We have done several 6.0l conversions this way and have made 500+ rwhp easy on boost!
The Radix WILL make 10lbs+ of boost,just have to know how to do it. The biggest thing you need to decide is HOW do you want your boost\TQ curve? Off idle and hard midrange or mid\topend pull. Which way you decide determines the build up(CR,cam,converter,gear ratio,etc...)
Like XLR8NSS said, pick your power level and how you want it, then pulley as needed,whatever the boost is thats it. Total airflow is the power factor. I can make you 500rwhp at 5lbs or 12lbs,just depends on the engine combo.
10-03-2004 | 12:12 AM
#37
Technically, yes, that's it. Practicality says you may as well get a shortblock, or a longblock and replace the 5.3. Buying just a 6.0 block and pistons is making it a lot harder than it should be by swapping all the rest from the 5.3 over.
You could prolly get an eBay special 6.0 for a reasonable price, if it came headless, you could pick some heads up on here for 300-350, less if you get lucky. Then you could just swap them as a whole, instead of having to have them both out taking one piece off the 5.3 and putting it on the 6.0.
THe better heads will actually drop the boost, but that doesn't necesarily mean it's less power. The blower will pump a given amount of air regardless of the pressure. If the engine breathes better than the average engine, it will obviously be a lot less restrictive for that air pump sitting on top to push the air through, thus lowering the pressure.
Like X<R said, I think instead of picking x psi, maybe you should target a HP range.
You could prolly get an eBay special 6.0 for a reasonable price, if it came headless, you could pick some heads up on here for 300-350, less if you get lucky. Then you could just swap them as a whole, instead of having to have them both out taking one piece off the 5.3 and putting it on the 6.0.
THe better heads will actually drop the boost, but that doesn't necesarily mean it's less power. The blower will pump a given amount of air regardless of the pressure. If the engine breathes better than the average engine, it will obviously be a lot less restrictive for that air pump sitting on top to push the air through, thus lowering the pressure.
Like X<R said, I think instead of picking x psi, maybe you should target a HP range.
10-03-2004 | 12:38 AM
#38
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From: LA
Originally Posted by Flyer
You could prolly get an eBay special 6.0 for a reasonable price, if it came headless, you could pick some heads up on here for 300-350, less if you get lucky. Then you could just swap them as a whole, instead of having to have them both out taking one piece off the 5.3 and putting it on the 6.0.
10-03-2004 | 12:41 AM
#39
Sure seems like a lot of work to me, but if that's the way he wants to go, whatever makes him happy!
IMO opinion, forged pistons aren't needed until he starts making some big power.
IMO opinion, forged pistons aren't needed until he starts making some big power.
10-03-2004 | 01:51 AM
#40
Adkoonerstrator
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From: Deep in the seedy underworld of Koonerville
Chevy - Just take it to Allan and let him work his magic. 
I didn't pay enough attention to see that the pistons would be getting changed out. Running your 5.3L heads will be no problem because the pistons can be ordered to put the compression ratio wherever it needs to be. Allan will get you set up to meet your goals and do it safely.
I didn't pay enough attention to see that the pistons would be getting changed out. Running your 5.3L heads will be no problem because the pistons can be ordered to put the compression ratio wherever it needs to be. Allan will get you set up to meet your goals and do it safely.