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Old 07-17-2011, 05:01 PM
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If I were you I'd look into some 8.1 marine injectors and just get that outta the way. They are plenty big for just about anything you can throw at em unless you go FI. And a step up in cam and converter size would be my next move. Also, what gear are you running? Some 3.73S should wake it up quite a bit!
Old 07-17-2011, 05:08 PM
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Originally Posted by 14psisupra
so do you think only planning to go as big as a 220 cam it isnt a worth while swap for me? and iv also read of losing power on a mild 5.3 with the tbss intake thats why i backed out of that before.
i would skip the cam swap and maybe pick up some heads,,,stock 243s milled down or even mill the stock 706 heads on your truck with big valves
Both can be done for the price you would pay for a new cam

swapping cams will net a slightly higher peak power but your gonna lose power under the curve which you need in a crewcab and makes a good daily with no dead spots in rpm range

skip the TBSS intake with the setup you have i did it and went back to stock truck intake..lost at the track,i have a thread on it somewheres
Old 07-17-2011, 05:57 PM
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already running a 3.73 gear....with a set of 243s milled down id have to get shorter pushrods correct? i have 7.4s now. what about running them stock? what kind of gains could be seen. everyone has a diff opinion now im not sure what direction i want to go
Old 07-17-2011, 06:03 PM
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milled heads do require shorter pushrods correct running them unmilled will lose compression on your motor it has a dish piston
i dont see why it wouldnt gain 15-20hp from the headswap..they flow alil better 20-30cfm better and added compression

Even some 1.8 roller rockers would gain a few hp by upping the lift

we all have diff opinions on what we would do
Old 07-17-2011, 06:06 PM
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you have a good setup thats strong i am sure dont screw with it to much
Just compliment the parts you have without screwing up a good working combo
Old 07-17-2011, 06:28 PM
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I would get some ported and milled 862/706 heads. Get them so they're milled enough to bring your compression around 10.5:1. And of course make sure they have a good port job.

The heads I put on my 6.0 jacked my compression from 9.5 to 10.8. That along with the added flow netted me big gains everywhere, especially down low. Knocked about .3-.4 seconds of my ET.
Old 07-17-2011, 10:39 PM
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I was thinking a $400 set of budget heads not ported $1000 or more
If you gonna spend $1000 on heads may as well put a 6.0 in
Old 07-18-2011, 04:11 AM
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Originally Posted by grey matter 04
I was thinking a $400 set of budget heads not ported $1000 or more
If you gonna spend $1000 on heads may as well put a 6.0 in
Agreed with grey^^ you have a great setup get milled heads valve job 8.1 injectors and get a dyno tune from wheatley you should like the outcome
Old 07-18-2011, 10:37 AM
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I've got a extra pair of 317 heads and was thinking about getting them milled .030 or .035 and doing a P&P, would it be worth it to get it worked for bigger valves too or is it a waste?
Old 07-18-2011, 05:26 PM
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I figured if you're going through the hassle of swapping heads, you might as well swap on a good set. He'll be able to swap them over to a 6.0 or resell them if he has to, as they do hold their value decently. Just another opinion, that's what he's here for, right?


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