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Old 12-21-2012, 09:30 PM
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new build 383 and a big hi

hi to all , i'm from new zealand and have just singed up.

I have always injoyed reading posts on this form , and enjoy the wealth of knowlage that all have shared with others.

i too, have decided to build a new engine , i have chosen to do a 383 chevy for a fast street car with a little strip time but nothing serous.

i know the block i have is pushing it a bit being a too bolt , so i'm trying to keep it to a 6000 rpm max to make lasts and to keep it togiver.

here is what i have done to the block and a list of parts i have put togever.

please dont be to hard on my lists of parts as this is what i have areadly and got on my best knowlage at had at the time.


the block is a 87 350 roller block , two bolt mains
.30 over decked e.c.t , arp studs , reworked moroso std oil pump with anticavitiation grooves , have cleaned up rear main cap where the oil pump bolts too.

streamlined filter mount area and passage to filter and exits.
cleaned and opened up areas that drain the oil back to crank case.
fitted brass standpipes in valley floor.ground down the two large holes at the front of the block , now oil retune through front and rear of block.

have a scat 383 strocker kit with 3.75 forged crank , scat premium 6" rods with 7/16 bolts.
pistons are probe forged sprotman race series with 12.80cc dish , moly ring set.
heads are air flow research 195cc with 65cc chambers with 2.050 intake valve and 1.6 ex valve.

cam is comp cam xr282hr-10 with 510/520 lift and 110 lobe sep.

comp cam billet double roller timing set.
comp cam full roller rockers , 1.6 ultra gold arc.

edlebrock rpm airgap manafold with one inch carb spacer.
carb is Aed performance 750 doulble pumper carb.

perfromance oil pan.

powerfire ignition system.

8" powerforce damper.

not sure what hp will be but would hope for 480+ at flywheel.

thanks for looking and any feed back on my comb wil be great .
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Old 12-21-2012, 09:34 PM
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If you still have 98 octane fuel there,done be afraid to use 11:1 and a good cam
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Old 12-21-2012, 10:37 PM
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Originally Posted by vinniekq2 View Post
If you still have 98 octane fuel there,done be afraid to use 11:1 and a good cam
hi yes will be running on 98 octane fuel, with the block deck to zero , pistons at 12.80cc dish, heads with 65cc chambers plus fel pro gasket comperssed to .041 my compersstion will be 10.1. the cam is a comp cam 282hr roller cam with 510/520 lift , afer adding 1.6 roller rockers it will be 544/555 lift. my touqconveter still will be 3000rpm with 3.73 in the rear.
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Old 12-22-2012, 06:02 AM
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I would even use the 300HR. It sounds like you want a very mild engine?
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Old 12-22-2012, 07:59 AM
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new build 383 and a big hi

When choosing a cam this mechanical roller will put you over 500hp. 12-770-8 - Xtreme Energy
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Old 12-22-2012, 08:02 AM
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Vinny:
Their pump gas octane rating is no the same as ours R+M/2.
Theirs is European Din rated. Essentially R only rated. Their 98 is the same as our 92.
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Old 12-22-2012, 08:06 AM
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BJ,from what fbird just posted ,maybe back the CR to 10.5 or less depending on the cam you choose. Just dont be too shy with the cam unless you just want smooth idle.
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Old 12-22-2012, 09:05 AM
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bjautos7,
Have you checked the front of the block for clearance for the double row timing chain and gear. I had to grind on mine to get it to fit.
Good Luck,
ssmonty
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Old 12-22-2012, 02:06 PM
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Given the amount if work you have done for oil drain back,you should paint the lifer valley and behind the timing chain cover on the front of the engine with glycol paint.It fills the pores and quickens the oil to drain back.
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Old 12-22-2012, 02:10 PM
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Quote:
Originally Posted by vinniekq2 View Post
I would even use the 300HR. It sounds like you want a very mild engine?
i feel like that would be to big as i'm running power brakes and would not have a enough vaccum for the power brakes. plus this is a street car.
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Old 12-22-2012, 02:26 PM
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Originally Posted by cdminter59 View Post
When choosing a cam this mechanical roller will put you over 500hp. 12-770-8 - Xtreme Energy

thank but have chossen this cam xtreme energy XR282HR to start with frist. i can allway step it up later on , just want to keep it a nice street car , with this cam i will be running with a 3000rpm still with 3.73 rear. just did't want to over cam it , better to start smaller frist then go from there.
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Old 12-22-2012, 02:35 PM
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Originally Posted by vinniekq2 View Post
BJ,from what fbird just posted ,maybe back the CR to 10.5 or less depending on the cam you choose. Just dont be too shy with the cam unless you just want smooth idle.

thanks , my cr works at to be 10.1 and will start with this cam xtreme energy XR282HR with a 3000rpm still and 3.73 rear end. i can alway step it up later on. just don't want to over cam it to start with.
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Old 12-22-2012, 02:39 PM
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bjautos7,
Have you checked the front of the block for clearance for the double row timing chain and gear. I had to grind on mine to get it to fit.
Good Luck,
ssmonty
yes thanks have checked as mine needed a little clearance as well.
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Old 12-22-2012, 02:46 PM
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Given the amount if work you have done for oil drain back,you should paint the lifer valley and behind the timing chain cover on the front of the engine with glycol paint.It fills the pores and quickens the oil to drain back.
yes i like that , i would be looking at getting it done and it looks so much better too. i will be putting all to giver after christmas so can't wait.
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Old 12-23-2012, 01:49 PM
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new build 383 and a big hi

bjautos7, The XR282HR will work fine with your combination. Using CamQuest6 software your combination will produce around 470 hp. I think that is in the hp range you wanted. Like you said your compression is 10.017 and the DCR is 8.521 with the xr282hr-10 camshaft. It should run fine on your 98 octane gas.
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