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-   -   Ptv ? (https://www.performancetrucks.net/forums/internal-engine-modifications-158/ptv-479510/)

1slowz71 03-16-2011 10:20 PM

Ptv ?
 
So i got a fti ssht cam , 228/232 .612/.600 111+3 lsa
its going on my lq4 with my heads being milled .050, do you guys thunk i'll run into ptv problems ! I know the best thing is to clay the pistons, but just would like ya'll opinion !

SLOXCAB 03-16-2011 10:56 PM

be close but like you said clay is the best way. we should roll race before and after to see the results

1slowz71 03-16-2011 11:00 PM

I'm down for that send me that video that alex told me about! n-e ways spoke to richard at wcch's a few days ago and he told me it would be perty close but should clear , I really want it to clear cuz I really like the specs on that cam and have heard good things about it!

dmelvin 03-16-2011 11:15 PM

I'm not even going to guess without you doing a clay imprint... that's a pretty big lift for heads that are shaved that much.

I am very interested to see this run though :hmmm:

Mangled03gmc 03-16-2011 11:53 PM

I would think your getting close with them specs, like said clay them.. Can I ask why you went so donkey dick on that cam??? Stock valves or bigger on intake and exhaust???

Gadgetized 03-17-2011 02:24 AM

I have never clayed for PVC. Assemble everything like you would, and turn the engine over by hand. When you get to the clearance areas use a pry bar, and pry down on the rocker/valve assembly. Give it at least .060 clearance, and you should be fine. The clay just takes one more step and a lot more work, you will be fine with the pry bar.

1slowz71 03-17-2011 08:14 AM

Jonh : I'm still trying to figure that out my self , i'm actually considering getting rid of it but might just try it to ! I was actually spect out by a known cam guru at more duration on the intake but only a 600 lift ,and after doing intense research on cams and seing this 1 for sell i thought it was the cam 4 me , but then started thinking about ptv !


Gadgetized: Thank for the help i did not think off that but will try it , i'm not trying to pull the heads off unless nothing else can be done!

Gadgetized 03-17-2011 10:33 AM

And after thinking of it, I am not sure how the clay would work with hydraulic liters without measuring.

05gmcsierra 03-21-2011 04:43 PM


Originally Posted by SLOXCAB (Post 4664289)
be close but like you said clay is the best way. we should roll race before and after to see the results

i wana roll race! on my new cam and stall that is.. jejeje.. :burnout:

WICKEDOWESIX 05-26-2011 07:18 PM


Originally Posted by Mangled03gmc (Post 4664336)
I would think your getting close with them specs, like said clay them.. Can I ask why you went so donkey dick on that cam??? Stock valves or bigger on intake and exhaust???

That is not a donkey dick cam for a 6.0L IMO. I just stepped up to the to a similar cam from my 228R cam on my truck. At .600" lift the stock 317 heads flow their peak numbers........

Here is the stock 317 flow chart from Rochard at WCCH

Here's the stock 317 port:
Lift......Int...........Exh
.100" ..64.8........53.3
.200"..142.1.......111.6
.300"..204.3.......146.8
.400"..233.5.......164.9
.500"..250.0.......174.2
.550"..251.2.......181.2
.600"..253.0.......184.4

Test bore = 4.030"
Exhaust tested without pipe.
Richard 


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