6.0 procharger build. Need advise
01-02-2018, 02:26 PM
#1
6.0 procharger build. Need advise
So right now I have a 2005 extended cab z71 with a BTR stage 3 truck cam and a d1sc @11 psi and methanol injection but not tuned for meth. The truck makes about 480 rwhp at the moment. I have picked up an lq4 that is going to be rebuilt with forged internals with the goal of around 650-700 rwhp. The engine came with a fresh set of 317s that I will use if they will meet my power goals, if not then I will buy a set of ls3 heads. Either way I’ll be using a nnbs intake. I’m open to suggestions on cams and boost levels/compression needed to meet my goals if it can be done with 317s. I have no interest in spinning the engine over 6500 rpm or being tuned to depend on methnol to keep detonation down. Any advise would be appreciated from you 6.0 procharger guys.
Last edited by 4fiftymore; 01-02-2018 at 02:47 PM. Reason: Forgot to mention intake.
01-02-2018, 04:45 PM
#2
Compression is your friend with a procharger.
I'd target 10.5ish if it was mine. I'd also stay cathedral in a heavy truck with that power adder. It will make it snappy as hell at low boost and out of boost. A nice set of cathedrals can flow all the air you will need to make big power at higher RPM too. You'll want a big *** exhaust to let this thing breathe. 1 7/8" headers and dual 3" or a single 4".
I'll tell you right now you should just go right to the HOB direct drive bracket set up... the normal bracket will give you hell as you start to push it.
As far as the cam goes... with those power numbers in mind the cam wont look like most traditional blower cams. It will look more like a LS3 NA cam. I would expect to see 15ish psi at 6500ish RPM with the blower approaching its max RPM. I would do something along these lines:
228/240 on a 113+4. You could get away with a 'tighter' 258mm converter which will make it much more pleasant in a heavier truck. Maybe a 3000ish. Like a Yank SC. It will give up a little at the track in your 60', but it will be plenty on the street that's for sure. If track times are what you have in mind I would go to about a '3200'
Is this going to be a daily driver? That cam is a bit extreme for daily driving duties...
I'd target 10.5ish if it was mine. I'd also stay cathedral in a heavy truck with that power adder. It will make it snappy as hell at low boost and out of boost. A nice set of cathedrals can flow all the air you will need to make big power at higher RPM too. You'll want a big *** exhaust to let this thing breathe. 1 7/8" headers and dual 3" or a single 4".
I'll tell you right now you should just go right to the HOB direct drive bracket set up... the normal bracket will give you hell as you start to push it.
As far as the cam goes... with those power numbers in mind the cam wont look like most traditional blower cams. It will look more like a LS3 NA cam. I would expect to see 15ish psi at 6500ish RPM with the blower approaching its max RPM. I would do something along these lines:
228/240 on a 113+4. You could get away with a 'tighter' 258mm converter which will make it much more pleasant in a heavier truck. Maybe a 3000ish. Like a Yank SC. It will give up a little at the track in your 60', but it will be plenty on the street that's for sure. If track times are what you have in mind I would go to about a '3200'
Is this going to be a daily driver? That cam is a bit extreme for daily driving duties...
01-02-2018, 05:35 PM
#3
Compression is your friend with a procharger.
I'd target 10.5ish if it was mine. I'd also stay cathedral in a heavy truck with that power adder. It will make it snappy as hell at low boost and out of boost. A nice set of cathedrals can flow all the air you will need to make big power at higher RPM too. You'll want a big *** exhaust to let this thing breathe. 1 7/8" headers and dual 3" or a single 4".
I'll tell you right now you should just go right to the HOB direct drive bracket set up... the normal bracket will give you hell as you start to push it.
As far as the cam goes... with those power numbers in mind the cam wont look like most traditional blower cams. It will look more like a LS3 NA cam. I would expect to see 15ish psi at 6500ish RPM with the blower approaching its max RPM. I would do something along these lines:
228/240 on a 113+4. You could get away with a 'tighter' 258mm converter which will make it much more pleasant in a heavier truck. Maybe a 3000ish. Like a Yank SC. It will give up a little at the track in your 60', but it will be plenty on the street that's for sure. If track times are what you have in mind I would go to about a '3200'
Is this going to be a daily driver? That cam is a bit extreme for daily driving duties...
I'd target 10.5ish if it was mine. I'd also stay cathedral in a heavy truck with that power adder. It will make it snappy as hell at low boost and out of boost. A nice set of cathedrals can flow all the air you will need to make big power at higher RPM too. You'll want a big *** exhaust to let this thing breathe. 1 7/8" headers and dual 3" or a single 4".
I'll tell you right now you should just go right to the HOB direct drive bracket set up... the normal bracket will give you hell as you start to push it.
As far as the cam goes... with those power numbers in mind the cam wont look like most traditional blower cams. It will look more like a LS3 NA cam. I would expect to see 15ish psi at 6500ish RPM with the blower approaching its max RPM. I would do something along these lines:
228/240 on a 113+4. You could get away with a 'tighter' 258mm converter which will make it much more pleasant in a heavier truck. Maybe a 3000ish. Like a Yank SC. It will give up a little at the track in your 60', but it will be plenty on the street that's for sure. If track times are what you have in mind I would go to about a '3200'
Is this going to be a daily driver? That cam is a bit extreme for daily driving duties...
You pretty much nailed my exact plans. I forgot to mention that I already have 1 7/8 headers and a true dual 3 inch exhaust. I’ve really been looking at the btr centrifugal truck cam or similar. It is a 223/240 .610/.588 113+5. I have a 2800 stall converter right now and will go to something in the 3200 range. I know you mentioned 10.5:1 and 15 psi in your post but do you think that would survive on 93 octane?
01-02-2018, 06:00 PM
#5
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