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genIII turbo help with camshaft
#1696355
11/08/14 09:40 PM
11/08/14 09:40 PM
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Joined: Aug 2003
Posts: 3,101
cincinnati ohio
mcat4321
OP
master
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OP
master
Joined: Aug 2003
Posts: 3,101
cincinnati ohio
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CAM HELP for those of you keeping score at home, i tore down my perfectly running n/a hemi.. 68 barracuda now i am going the turbo route parts are coming in and its time to decide on a cam i have 76mm t4 turbo a 2006 5.7 short block 2008 6.1 heads and intake 85mm throttle body 3k ish stall 373 gear 27 inch drag radial 
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Re: genIII turbo help with camshaft
[Re: mcat4321]
#1696356
11/08/14 09:49 PM
11/08/14 09:49 PM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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If you only have one 76mm turbo, I would go with a stock cam. You will choke any good breathing V8 with that.
"use it 'till it breaks, replace as needed"
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Re: genIII turbo help with camshaft
[Re: TRENDZ]
#1696357
11/08/14 09:54 PM
11/08/14 09:54 PM
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Joined: Aug 2003
Posts: 3,101
cincinnati ohio
mcat4321
OP
master
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OP
master
Joined: Aug 2003
Posts: 3,101
cincinnati ohio
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Quote:
If you only have one 76mm turbo, I would go with a stock cam. You will choke any good breathing V8 with that.
explain "choke" and "only one"
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Re: genIII turbo help with camshaft
[Re: mcat4321]
#1696358
11/08/14 11:59 PM
11/08/14 11:59 PM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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Choke: to limit breathing. Only one: more than zero, less than two. 
"use it 'till it breaks, replace as needed"
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Re: genIII turbo help with camshaft
[Re: TRENDZ]
#1696359
11/09/14 12:02 AM
11/09/14 12:02 AM
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Joined: Aug 2003
Posts: 3,101
cincinnati ohio
mcat4321
OP
master
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OP
master
Joined: Aug 2003
Posts: 3,101
cincinnati ohio
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Quote:
Choke: to limit breathing.
Only one: more than zero, less than two.
thanks for the help ass
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Re: genIII turbo help with camshaft
[Re: mcat4321]
#1696360
11/09/14 12:04 AM
11/09/14 12:04 AM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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....And that's all the help you will ever get from me.
"use it 'till it breaks, replace as needed"
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Re: genIII turbo help with camshaft
[Re: mcat4321]
#1696361
11/09/14 02:39 AM
11/09/14 02:39 AM
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Joined: Feb 2007
Posts: 72
San Angelo, Texas
Cevidicus
member
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member
Joined: Feb 2007
Posts: 72
San Angelo, Texas
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Quote:
CAM HELP
for those of you keeping score at home, i tore down my perfectly running n/a hemi.. 68 barracuda
now i am going the turbo route
parts are coming in
and its time to decide on a cam
i have 76mm t4 turbo
a 2006 5.7 short block
2008 6.1 heads and intake
85mm throttle body
3k ish stall
373 gear
27 inch drag radial
What cam do you have in it now? How much horsepower do you want to make? Are you running a stock short block? I ask because they say 8psi is all the stock pistons can handle. Ring gap is also critical. That's probably a bigger contributing factor than weak pistons. Of course tuning is critical. But I know you are aware of that.
Best thing to do would be to call a vendor like modern muscle, hhp, Arrington, inertia. Etc and get several suggestions from those guys. They spec cams all day and know their shtuff.
I have a magazine article where they took an 06 5.7 stock short block and opened up the ring gaps to like 0.030, ported the heads, added a 6.1 intake and crane cam and put 17.3 psi to make 1127 hp. That's probably a bit optimistic but a 76 mm should be good to over 1000 hp. 8psi should be good for like 600 650 with non ported heads. Ported heads would be worth some more.
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