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383 bigblock #1296598 09/03/12 11:31 PM 09/03/12 11:31 PM
Joined: May 2012 Posts: 32 LaFollette TN 37766 3 383ramd150 OP member
383ramd150 OP member 3 Joined: May 2012 Posts: 32 LaFollette TN 37766	Well guys,Sold my 318 and now building 383 bored 30 over for my 83 d150!Just want to see what you guys think!Most of the parts have been bought except for pistons and rings,harmonic balancer and water pump!Here is the build specs-383 with 30 over,KB400 pistons for 9.5 compression,906 heads with port job and valve job with stock valves and rockers,weiand 8008 intake,Comp magnum 280H cam with 230@50 duration 480 lift and 2500-5800 rpm,Holley 750 dp,hooker headers,727 with turbo action 3000 stall and 8.75 489 case with 3.91 suregrip!What do you guys think? 7363673-081912213900.jpg (114 downloads)

Re: 383 bigblock [Re: 383ramd150] #1296599 09/04/12 12:16 AM 09/04/12 12:16 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	I'd find some 915 heads & build for .040" quench (piston to head) for a MUCH more efficient eng (torque/mileage/power). 8 blade water pump with an added anticav plate. Possibly a VS rather than a DP carb & if a Holley get one of the holley clones with adjustable air bleeds live every 24 hour block of time like it's your last day on earth

Re: 383 bigblock [Re: 383ramd150] #1296600 09/04/12 12:17 AM 09/04/12 12:17 AM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	I hope that engine paint in the valley doesn't peel off ...

Re: 383 bigblock [Re: JohnRR] #1296601 09/04/12 01:05 AM 09/04/12 01:05 AM
Joined: May 2012 Posts: 32 LaFollette TN 37766 3 383ramd150 OP member
383ramd150 OP member 3 Joined: May 2012 Posts: 32 LaFollette TN 37766	The guy in the photo builds bigblocks and he says it will help keep all the oil moving says he does it on all his!Unless you think i should but he says it will not hurt!

Re: 383 bigblock [Re: 383ramd150] #1296602 09/04/12 01:16 AM 09/04/12 01:16 AM
Joined: May 2012 Posts: 32 LaFollette TN 37766 3 383ramd150 OP member
383ramd150 OP member 3 Joined: May 2012 Posts: 32 LaFollette TN 37766	Hey JohnRR,Do you think i should use my 906 heads and kb400 pistons or should i use flattop and 516 heads?The only reason is We dont think the block was zerodecked but I aint got the money to take and have checked but all the machine work on it is done but the shop that done it shut down so the pistons might sit in the hole so which piston should i do?

Re: 383 bigblock [Re: 383ramd150] #1296603 09/04/12 01:20 AM 09/04/12 01:20 AM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	I don't like the KB 400 piston ... someone is going to ask why , because I just do not , I don't really like any KB hyper , but it's not my engine ... I would get 516's and a flat top , either the speedpro or KB since you are on a budget and use the .021 steel shim head gasket . The paint in the valley , as long as the guy cleaned it real good and it sticks and doesn't peel off ...

Re: 383 bigblock [Re: JohnRR] #1296604 09/04/12 01:33 AM 09/04/12 01:33 AM
Joined: May 2012 Posts: 32 LaFollette TN 37766 3 383ramd150 OP member
383ramd150 OP member 3 Joined: May 2012 Posts: 32 LaFollette TN 37766	Ok thanks!If the pistons are sitting in the hole what would the comp be?

Re: 383 bigblock [Re: 383ramd150] #1296605 09/04/12 05:34 AM 09/04/12 05:34 AM
Joined: Jul 2008 Posts: 259 Khemi, Stygia Mebsuta enthusiast
Mebsuta enthusiast Joined: Jul 2008 Posts: 259 Khemi, Stygia	That sound like a good motor. I would have used a smaller cam and 625 cfm carb, but you might be a good tuner. 68 Roadrunner. 383 4-spd. Beat up.

Re: 383 bigblock [Re: 383ramd150] #1296606 09/04/12 08:29 AM 09/04/12 08:29 AM
Joined: Oct 2003 Posts: 21,345 Marysville, O-H-I-O 70Cuda383 Too Many Posts
70Cuda383 Too Many Posts Joined: Oct 2003 Posts: 21,345 Marysville, O-H-I-O	Quote: Ok thanks!If the pistons are sitting in the hole what would the comp be? that's going to depend on how FAR in the hole they'll be! along with which head gasket you run. if you dont want to change heads, and want to increase compression, you can shave the heads too. should be a simple job for any machine shop and you won't have to touch the block. Photobucket sucks

Re: 383 bigblock [Re: 383ramd150] #1296607 09/04/12 10:27 AM 09/04/12 10:27 AM
Joined: Dec 2008 Posts: 2,782 USA J JoesMopar master
JoesMopar master J Joined: Dec 2008 Posts: 2,782 USA	Painting the valley is pretty much unnecessary on anything except maybe an Oldsmobile 455. Our engines don't have oil return problems. If you can't find a "decent" head, try looking at Edelbrocks new series. I think it's called an E-street. I talked with them at the Nats and supposedly they're going to have something smaller than an 80cc chamber, perfect for a 383 to help boost CR. Like JohnRR mentioned, I'd go with the SpeedPro 2315's (no valve relief), of course you'll have to check your piston to valve clearance with that cam. I'd ditch the Holley 750 DP and go with a vaccum secondary carb, maybe a little smaller too.

Re: 383 bigblock [Re: JoesMopar] #1296608 09/04/12 10:50 AM 09/04/12 10:50 AM
Joined: Jan 2003 Posts: 3,920 n.e. pa. 6 65rbdodge master
65rbdodge master 6 Joined: Jan 2003 Posts: 3,920 n.e. pa.	sounds like a good combo, i have KB pistons in a 440 and a 400, w/ no problems. the only thing I would not use is the 750dp. i`d use a 750vs holley.

Re: 383 bigblock [Re: 65rbdodge] #1296609 09/04/12 11:30 AM 09/04/12 11:30 AM
Joined: May 2012 Posts: 32 LaFollette TN 37766 3 383ramd150 OP member
383ramd150 OP member 3 Joined: May 2012 Posts: 32 LaFollette TN 37766	If I was to use kb162 pistons what would i have to do to the 906 heads if i cant get the 516 heads?I've got a holley 3310 too!But if i gonna race it then I can use the dp!

Re: 383 bigblock [Re: 383ramd150] #1296610 09/04/12 11:43 AM 09/04/12 11:43 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	no reason a 750DP wouldn't work fine. People that bash them can't tune them. I ran one on a mild 340 and it worked great, no "gas" smell, pulled hard as nails and I managed to get 17mpg at 70mph. I'd use what ever pistons gave you the most compression. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: 383 bigblock [Re: Mr.Yuck] #1296611 09/04/12 11:48 AM 09/04/12 11:48 AM
Joined: May 2012 Posts: 32 LaFollette TN 37766 3 383ramd150 OP member
383ramd150 OP member 3 Joined: May 2012 Posts: 32 LaFollette TN 37766	I just learned how to rebuild them but still learning the tune but my buddy is pretty good!

Re: 383 bigblock [Re: Mr.Yuck] #1296612 09/04/12 12:17 PM 09/04/12 12:17 PM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	Quote: People that bash them can't tune them. I guess the same can be said for those that bash Carter carbs

Re: 383 bigblock [Re: 383ramd150] #1296613 09/04/12 12:18 PM 09/04/12 12:18 PM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	Quote: If I was to use kb162 pistons what would i have to do to the 906 heads if i cant get the 516 heads?I've got a holley 3310 too!But if i gonna race it then I can use the dp! If you use the 906s the 162 is going to have your compression ratio at close to 8.0

Re: 383 bigblock [Re: JohnRR] #1296614 09/04/12 12:20 PM 09/04/12 12:20 PM
Joined: Dec 2008 Posts: 2,782 USA J JoesMopar master
JoesMopar master J Joined: Dec 2008 Posts: 2,782 USA	A 750 DP....in a heavy truck....on a low comp 383.....with a 280 cam....go ahead and tune away.

Re: 383 bigblock [Re: JohnRR] #1296615 09/04/12 01:36 PM 09/04/12 01:36 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: Quote: People that bash them can't tune them. I guess the same can be said for those that bash Carter carbs not really.. just depends on what carter/Eddy carb you use for what application. I've used several of them in the past w/o issues. However I would never use the 750 Eddy on a mild 440.

Re: 383 bigblock [Re: JoesMopar] #1296616 09/04/12 01:59 PM 09/04/12 01:59 PM
Joined: May 2012 Posts: 32 LaFollette TN 37766 3 383ramd150 OP member
383ramd150 OP member 3 Joined: May 2012 Posts: 32 LaFollette TN 37766	Well i just got off the phone with mancini racing and told them my issue and they said i would have no problem with kb400 pistons and to make sure to measure how far the piston sits!They said if it is not zero decked to run steel shim head gaskets and my compression should be between 9.5 to 10.1!I can make a 750 dp work just like i did on a 360 but i like the 3310 too!And trucks can run too,they might be heavy but so is 71-74 b-bodies plus using 3000 stall and 3.91 gear and may go lower!

Re: 383 bigblock [Re: 383ramd150] #1296617 09/04/12 02:08 PM 09/04/12 02:08 PM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	Quote: Well i just got off the phone with mancini racing and told them my issue and they said i would have no problem with kb400 pistons and to make sure to measure how far the piston sits!They said if it is not zero decked to run steel shim head gaskets and my compression should be between 9.5 to 10.1!I can make a 750 dp work just like i did on a 360 but i like the 3310 too!And trucks can run too,they might be heavy but so is 71-74 b-bodies plus using 3000 stall and 3.91 gear and may go lower! What are you planning to do with this truck ? Do you want it to run on pump premium ?

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