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Re: 383 performance upgrade questions
[Re: DJVCuda]
#815713
09/28/10 01:27 PM
09/28/10 01:27 PM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Quote:
They really like to drive the car alot,so I have to keep things with in some reason.I mainly didnt want to put a huge stall converter in it just for driveability
thats false - I run a 3800 stall dynamic with 3.23's and it drives like a stock converter = till you nail it!
I need to get one of those then because my 3800 turbo action is nothing like a stock stall.
...anyway if you are stuck with that build I'd call one of the custom cam guys and have one made. Tell them what car, weight, engine, stall and gear you want to run and they will grind one up for your needs. It will probably have a real fast intake ramp so you'll need good valve springs. Your 906 heads will be fine, even better w/ 2.14/1.88 valves but the 2.08's will work. I'd run an RPM intake, Holley 750DP and headers. Should make close to 400 if you can get the compression around 10:1.
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Re: 383 performance upgrade questions
[Re: greg383]
#815715
09/28/10 04:24 PM
09/28/10 04:24 PM
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Joined: Jan 2003
Posts: 75,089
A Banana Republic near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,089
A Banana Republic near you.
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Quote:
How much should i mill the heads down to get to 84cc.Is there any piston to valve problems with .507 lift of the XE284H.Do i need to mill the block down for the 9.5:1 comp with this combo?
There is no way of knowing how much to mill the heads down till you CC the chambers to find out what they are, they could be anywhere from 88cc to 92 cc . Same for the block, you need to chose a piston. The block at minimum needs to be decked to make it square to the crank line and the same deck height side to side. KB pistons have canyons for a valve relief so that much lift SHOULD have plenty of clearance .
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Re: 383 performance upgrade questions
[Re: JohnRR]
#815716
09/28/10 05:23 PM
09/28/10 05:23 PM
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Joined: Aug 2007
Posts: 6,098
Valencia, España
NachoRT74
master
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master
Joined: Aug 2007
Posts: 6,098
Valencia, España
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average CC on stock open chambers are 90 cc, but it could be anything from 88 to 92
by each CC you must cut down 0.0042, so expect to cut around 0.030
then cut around 0.036 on intake side of heads
With a Charger born in Chrysler assembly plant in Valencia, Venezuela
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Re: 383 performance upgrade questions
[Re: greg383]
#815717
09/28/10 05:32 PM
09/28/10 05:32 PM
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Joined: Jan 2003
Posts: 5,186
Wherever I am.
Junky
master
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master
Joined: Jan 2003
Posts: 5,186
Wherever I am.
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Quote:
How much should i mill the heads down to get to 84cc.Is there any piston to valve problems with .507 lift of the XE284H.Do i need to mill the block down for the 9.5:1 comp with this combo?
In reality a .507 lift will be more like .490 lift if running stamped steel rockers which are more like 1.45 to 1, not 1.5 to 1.
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Re: 383 performance upgrade questions
[Re: greg383]
#815718
09/28/10 06:56 PM
09/28/10 06:56 PM
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Joined: Nov 2004
Posts: 843
Suffolk,VA
ireland383
super stock
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super stock
Joined: Nov 2004
Posts: 843
Suffolk,VA
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Quote:
What pistons are you running with the XE274H?
I'm running KB400's. The cam I'm running is a 275DEH 482 lift a little smaller than the XE274H. You should be fine with stock rockers. No issues here. 
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Re: 383 performance upgrade questions
[Re: greg383]
#815719
09/28/10 07:36 PM
09/28/10 07:36 PM
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Joined: Dec 2008
Posts: 459
pana illinois
bigblock4x4
mopar
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mopar
Joined: Dec 2008
Posts: 459
pana illinois
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Quote:
I have a 68 383 that im trying to get more power out of.Its out and on the floor and now im going through the process of finding the right parts to make power on a semi budget.I am rebuilding the entire engine.I would like to know what pistons and bore would be best.I would like to run the biggest cam that i can without having to do a custom valve train.It already has 906 heads with 2.08 intake valves.Im looking for at least 400 to 450 hp.Anyone have any ideas?
my buddy has a fresh 383,he goes by don440 on here,i think he wants to sell it,it's zero decked crank turned and polished,all it needs is balanced and assembled oh it needs painted,don't know if that will help u any just thought i would chime in,thanks
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Re: 383 performance upgrade questions
[Re: 383man]
#815721
09/29/10 08:40 AM
09/29/10 08:40 AM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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I think I'd run the XE268 or the Lunati 60302 anda factory high-stall convertor and you're done. No reason to get way exotic IMO if you're looking for a nice cruiser and not really looking to spend. You can do everything to the block, I do on my builds, but for a solid fun cruiser, you don't have to unless you want to maximize the effort and don't mind spending. Basic rebuild, blueprinting the block... If it was me, I wouldnt cut the heads more than whatever the max is that can be removed from the intake side and still seal the valve covers. Otherwise you're looking at milling an intake to fit special. Again.. How far do you want to go when cruising is th goal?
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: 383 performance upgrade questions
[Re: greg383]
#815725
10/04/10 02:45 PM
10/04/10 02:45 PM
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Joined: Feb 2008
Posts: 992
Simi Valley, CA
MoparJ
super stock
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super stock
Joined: Feb 2008
Posts: 992
Simi Valley, CA
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Quote:
If i stay under the .500 lift cam spec.Can I run the stock non-adjustable rockers and shafts.I was just going to replace with mopar performance stock non-adjustable arms and shafts
Yes,just make sure the pushrod length is suitable with a new cam that comes.
2016 Ram 1500 Crew Cab: 5.7, 65RFE, 4.56 gears with locker, Hemifever tuned, AFE intake, 87mm throttle body, JBA headers, 3" Flowmaster exhaust, split to dual 2.5" exits. 13.57 best ET so far.
Searching for new A or B Body Project!
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Re: 383 performance upgrade questions
[Re: greg383]
#815726
10/04/10 03:12 PM
10/04/10 03:12 PM
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Joined: Jan 2003
Posts: 5,186
Wherever I am.
Junky
master
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master
Joined: Jan 2003
Posts: 5,186
Wherever I am.
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Quote:
If i stay under the .500 lift cam spec.Can I run the stock non-adjustable rockers and shafts.I was just going to replace with mopar performance stock non-adjustable arms and shafts
The stamped steel rockers are not a true 1.5 to 1 ratio, more like 1.45 to 1 ratio at best. So, for example, a .518 lift is more like a .490 lift in actuality. Stock heads with stock rockers can handle pretty much up to .500 lift, but always check to make sure.
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