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Re: 400BB build up [Re: Volare4life] #1658722 09/26/14 03:17 PM 09/26/14 03:17 PM
Joined: Jan 2005 Posts: 1,260 Las Vegas NV moparmanjames pro stock
moparmanjames pro stock Joined: Jan 2005 Posts: 1,260 Las Vegas NV	The rods should be good for your application but looking at your build it is very mild and all the stock components should be fine. Both the cams you are looking at are mild and should work. I would not mill the head, I would pick up a cheap set of closed chamer heads instead like some 516's. These are plentiful and cheap. I would run the .022" steel shim gaskets to keep the compression up and just surface the heads and block to make them true.

Re: 400BB build up [Re: GTS340] #1658723 09/26/14 03:24 PM 09/26/14 03:24 PM
Joined: Jan 2005 Posts: 1,260 Las Vegas NV moparmanjames pro stock
moparmanjames pro stock Joined: Jan 2005 Posts: 1,260 Las Vegas NV	Quote: Quote: There were 383s with cast cranks There were 383s with forged cranks. There were 400s with cast cranks. There were 400s with forged cranks. Cast to cast, forged to forged, the cranks are the same. For all I know they are the same casting or forging number. If you're using a forged crank with either 383 or 400 stock crank and rods, and neutral balance converter/harmonic damper, no need to balance. If you're using a cast crank with either 383 or 400 stock rods and pistons, you will need the cast crank harmonic damper and converter. Then, no need to balance. Of course, MOPAR balance jobs were the worst of the Big Three, so the stock balance jobs can definitely be improved. BUT, at this stage in your automotive development, you don't need to. I'd pick the smaller camshaft. 383s and 400s are very easy to overcam. R. Forged 400 cranks? What year and what applications were forged cranks used in 400s? I never saw a forged 400 crank in a stock engine but I've only seen about 200 so who knows?

Re: 400BB build up [Re: moparmanjames] #1658724 09/26/14 04:23 PM 09/26/14 04:23 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	Some early 4-speed cars and trucks had forged cranks in 400s. It's been discussed here before. R.

Re: 400BB build up [Re: dogdays] #1658725 09/26/14 06:49 PM 09/26/14 06:49 PM
Joined: Mar 2005 Posts: 119 Jacksonville , Fl V Volare4life OP member
Volare4life OP member V Joined: Mar 2005 Posts: 119 Jacksonville , Fl	I said the crank was a forged unit from a 383, I wanted to keep a stock displacement, but up compression with pistons to a solid 8-8.5, so its a better setup for boost by blower or turbos. The answers are out there you just got to look hard enough

Re: 400BB build up [Re: Volare4life] #1658726 09/26/14 08:40 PM 09/26/14 08:40 PM
Joined: Oct 2006 Posts: 596 Mass. 8 80fbody mopar
80fbody mopar 8 Joined: Oct 2006 Posts: 596 Mass.	I would drop the crank back in with a couple bearings (1,3,5) & install a couple pistons to check your deck height. I have a few 400 blocks and the pistons are WAY down in the hole. Also make cc kit and assemble one chamber on the head and check the cc's. These two measurements will allow you to accurately understand & set your compression the 1st time.

Re: 400BB build up [Re: 80fbody] #1658727 09/28/14 02:36 AM 09/28/14 02:36 AM
Joined: Mar 2005 Posts: 119 Jacksonville , Fl V Volare4life OP member
Volare4life OP member V Joined: Mar 2005 Posts: 119 Jacksonville , Fl	can't really do that, block is already at the machine shop. Just waiting to hear back from them to see how much they are boring it over, they want the pistons,rods, full set of rings for one piston, flex plate, and balancer so they can weigh and balance the whole set up and fit the pistons, know i know forged pistons expand more than the hyper's from what i am reading so how much piston to cylinder wall gap should i run ? What about a quality forged piston ? Icon, CP are names i keep seeing but haven't heard much about anyone running them ?? I saw these Wiseco Pro Tru Pistons PT108A55, its listed for a BB chebby,4.375 bore, flat top with 4 valve reliefs, has a Compression Distance (in):1.250 in. Piston Head Volume +10.00cc, and of course a .990 pin and the more desirable 1/16x1/16x3/16 ring pack and for about $530 not a bad deal The answers are out there you just got to look hard enough

Re: 400BB build up [Re: Volare4life] #1658728 09/28/14 07:27 AM 09/28/14 07:27 AM
Joined: Jul 2009 Posts: 490 IL E EchoSixMike mopar
EchoSixMike mopar E Joined: Jul 2009 Posts: 490 IL	Those Wiseco pistons are for a 3.75 stroke low deck with a 6.800 chevy rod. S/F.....Ken M

Re: 400BB build up [Re: EchoSixMike] #1658729 10/02/14 08:52 PM 10/02/14 08:52 PM
Joined: Mar 2005 Posts: 119 Jacksonville , Fl V Volare4life OP member
Volare4life OP member V Joined: Mar 2005 Posts: 119 Jacksonville , Fl	So I am looking at either the KB240 Bore (in):4.382 in. Bore (mm):111.303mm Piston Style:Flat top, with a trough Piston Material:Hypereutectic aluminum Compression Distance (in):1.908 in. Piston Head Volume (cc):-5.00cc Wrist Pin Style:Press-fit or floating Pin Diameter (in):1.094 in. Piston Ring Thickness:5/64 in. x 5/64 in. x 3/16 in. or the KB280 Bore (in):4.382 in. Bore (mm):111.303mm Piston Style:Step head, with two valve reliefs Piston Material:Hypereutectic aluminum Compression Distance (in):1.327 in. Dome Height (in):0.155 in. Piston Head Volume (cc):0.00cc Wrist Pin Style:Press-fit or floating Pin Diameter (in):1.094 in. Piston Ring Thickness:5/64 in. x 5/64 in. x 3/16 in. I am confused as to which with help with the compression bump, oh and I have to go 40 over, already magna fluxed and sonic checked to make sure and they said it could 60 over with no worries. So which pistons should i go with ? and these will be going on stock length rods THanks, -Mike The answers are out there you just got to look hard enough

Re: 400BB build up [Re: Volare4life] #1658730 10/03/14 08:55 PM 10/03/14 08:55 PM
Joined: Mar 2005 Posts: 119 Jacksonville , Fl V Volare4life OP member
Volare4life OP member V Joined: Mar 2005 Posts: 119 Jacksonville , Fl	Bump for info on pistons The answers are out there you just got to look hard enough

Re: 400BB build up [Re: Volare4life] #1658731 10/03/14 10:43 PM 10/03/14 10:43 PM
Joined: Oct 2006 Posts: 596 Mass. 8 80fbody mopar
80fbody mopar 8 Joined: Oct 2006 Posts: 596 Mass.	KB240 is the one. The KB280 is for the 451 stroke setup. That's why the comp distance is so much smaller. Do look into Probe, Icon, etc forged pistons. They're not typically much more than those KB hypers and much stronger. Oh and Icon is KB's forged line. You also can get 1/16" rings with forged pistons which make more power and give more options than the old style 5/64" rings that the hypers use. This guy has some pretty good piston prices usually. http://www.cnc-motorsports.com/pistons-1.html Last edited by 80fbody; 10/03/14 10:46 PM.

Re: 400BB build up [Re: 383man] #1658732 10/04/14 03:17 AM 10/04/14 03:17 AM
Joined: Aug 2003 Posts: 3,245 Between a rock & a hard place C cudadoug master
cudadoug master C Joined: Aug 2003 Posts: 3,245 Between a rock & a hard place	Quote: This is a 400 we have in my boys Dart. We used the forged 383 crank and of course had it all balanced as it uses stock rods and KB pistons. Also use the internal crank balancer. It had Eddy RPM heads that were cut a bit for 10.6 comp. We use the MP .557 solid flat tappet cam and the RPM intake with a 750 DP. It has a 9.5 Dynamic converter and 3.91 gears. At 3550 lbs with him in it he has dipped in the 11.40's @ 117 and it is a driver street car and runs on pump. Course this build wont help you if you are going to go with the turbo. Ron Not to hijack but Ron...do you realize that with light race wheels and a glass hood/sealed scoop your sons Dart is knocking on the 10 secon door? Holy smokes!

Re: 400BB build up [Re: 80fbody] #1658733 10/04/14 03:43 AM 10/04/14 03:43 AM
Joined: Mar 2005 Posts: 119 Jacksonville , Fl V Volare4life OP member
Volare4life OP member V Joined: Mar 2005 Posts: 119 Jacksonville , Fl	I appreciate the info and link 80fbody, -Mike The answers are out there you just got to look hard enough

Re: 400BB build up [Re: Volare4life] #1658734 10/08/14 12:03 PM 10/08/14 12:03 PM
Joined: Mar 2005 Posts: 119 Jacksonville , Fl V Volare4life OP member
Volare4life OP member V Joined: Mar 2005 Posts: 119 Jacksonville , Fl	got a set of eagle H-beams with arp 8740 bolts, and kb240's .040 over ordered up through cnc-motorsports, great guys to deal with and great prices too. Now I am looking at what dizzy to get, I have heard great things about both firecore and MSD, I want vacuum advance, and currently have an HEI setup on the car, just wondering which dizzy is easier to tune, also looking at some magnecor wires, I used them on my boosted slant and loved them, but I am open to suggestions as to what people have used and liked. -Mike The answers are out there you just got to look hard enough

Re: 400BB build up [Re: Volare4life] #1658735 10/08/14 02:31 PM 10/08/14 02:31 PM
Joined: Oct 2006 Posts: 596 Mass. 8 80fbody mopar
80fbody mopar 8 Joined: Oct 2006 Posts: 596 Mass.	I went with the Firecore as it clears pretty most all BB aluminum heads & I got a great deal on a new in box one. That said, MSD truly has the market cornered on the these. Quality product with plenty & plenty of guys run them on here so there's no shortage on help available.

Re: 400BB build up [Re: 80fbody] #1658736 10/08/14 09:23 PM 10/08/14 09:23 PM
Joined: Mar 2005 Posts: 119 Jacksonville , Fl V Volare4life OP member
Volare4life OP member V Joined: Mar 2005 Posts: 119 Jacksonville , Fl	Very true, but for the price you can't beat a firecore vacuum dizzy, and i hear its a lot easier to recurve it vs losing your mind breaking a MSD down lol Are you running firecore wires as well ? I was thinking about going with magnecor wires, but i don't know how they compare to firecore -Mike The answers are out there you just got to look hard enough

Re: 400BB build up [Re: cudadoug] #1658737 10/09/14 01:56 AM 10/09/14 01:56 AM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Quote: Quote: This is a 400 we have in my boys Dart. We used the forged 383 crank and of course had it all balanced as it uses stock rods and KB pistons. Also use the internal crank balancer. It had Eddy RPM heads that were cut a bit for 10.6 comp. We use the MP .557 solid flat tappet cam and the RPM intake with a 750 DP. It has a 9.5 Dynamic converter and 3.91 gears. At 3550 lbs with him in it he has dipped in the 11.40's @ 117 and it is a driver street car and runs on pump. Course this build wont help you if you are going to go with the turbo. Ron Not to hijack but Ron...do you realize that with light race wheels and a glass hood/sealed scoop your sons Dart is knocking on the 10 secon door? Holy smokes! He is actually in the process of getting a glass hood with the 6 pk scoop so he can run a taller intake if he wants to try some other intakes also. He has not had it out or driven it much in the last 2 years as he got married and his wife had my grandson about 3 months ago so he has been very busy. But he plans to get more serious with the Dart some day soon. Thanks , Ron Last edited by 383man; 10/09/14 01:57 AM.

Re: 400BB build up [Re: 383man] #1658738 10/16/14 09:07 PM 10/16/14 09:07 PM
Joined: Mar 2005 Posts: 119 Jacksonville , Fl V Volare4life OP member
Volare4life OP member V Joined: Mar 2005 Posts: 119 Jacksonville , Fl	got everything but the torque converter, flex plate, just real quick I am looking at roughly 9.5:1 compression with my build, what would everyones recommendation be for a DP carb and would a 2400 stall be a enough to help motivate my 3400lb 2dr volare with a 2.94 rear gear ? or should i be looking for a higher stall ? -Mike The answers are out there you just got to look hard enough

Re: 400BB build up [Re: Volare4life] #1658739 10/16/14 10:18 PM 10/16/14 10:18 PM
Joined: Jul 2004 Posts: 19,317 State of confusion T Thumperdart I Live Here
Thumperdart I Live Here T Joined: Jul 2004 Posts: 19,317 State of confusion	Quote: got everything but the torque converter, flex plate, just real quick I am looking at roughly 9.5:1 compression with my build, what would everyones recommendation be for a DP carb and would a 2400 stall be a enough to help motivate my 3400lb 2dr volare with a 2.94 rear gear ? or should i be looking for a higher stall ? -Mike Looks pretty good but why r u stuck on a DP carb? Also, there`s a fine line in my opinion w/verts and gearing especially n/a and that`s a TALL gear.............. Last edited by Thumperdart; 10/16/14 11:11 PM. 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: 400BB build up [Re: Thumperdart] #1658740 10/17/14 12:21 AM 10/17/14 12:21 AM
Joined: Mar 2005 Posts: 119 Jacksonville , Fl V Volare4life OP member
Volare4life OP member V Joined: Mar 2005 Posts: 119 Jacksonville , Fl	never could get vac secondary carbs to run right, and always had good success with DP carbs, and I just want lower rpms while cruising, might step up to 3.23, but its still a daily driver for now The answers are out there you just got to look hard enough

Re: 400BB build up [Re: Volare4life] #1658741 10/17/14 01:02 AM 10/17/14 01:02 AM
Joined: Jun 2006 Posts: 5,161 CT GTX MATT master
GTX MATT master Joined: Jun 2006 Posts: 5,161 CT	750 for the double pumper, and I'd go with 3.55s. 2.94s just suck, especially with a tall tire. Did you pick a cam? Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street

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