Mopar 340 x heads cc diagram 02s. They could have been milled,the valves could be a bit low in the seat,its really a shot in the dark. These were restored 20 years ago by Richard Clapham and have been in storage since. Forums. #2 08-27-2006, 10:24 AM rumblefish360. hope this helps. wow. 68-71 340 2. 23. Mopar heads 576 go or bad 0n a 340. The chambers are 62cc. I used the Carter TQ, modified a bit, and went with a re-man Chrysler electronic dist. Looking for casting numbers for a Mopar V8 cylinder head or engine block? It's probably listed in this guide, covering 1958-1993 production dates. I dunno if my book is wrong or the T/A heads may have just had radically different machining on the same Also, the Intake Port with the 2. They'll be the same, or should flow The "X" heads and the other 2. If your pistons are zero deck, then I'd run the 63 cc heads, with whatever thickness gasket will give you the desired quench. Clean bill of health from Barker Machine in Amarillo, TX. 02-inch valve 340 high-performance heads are really tough to find, but the later 360 smog heads flow just as well or better with just a little work. The closed chamber magnum head will measure out at 64cc. 88s. The oil passage pointed out in the photo is only on the La-X head. another big gain in the 1. X Heads vs J Heads. T. Thread starter couper 340; Start date Jan 18, 2013 - couper 340 FABO Gold Member. 340 Initial timing questions. Looked at the Every conversion I sell from LA heads to Magnum have been in increase in 25 to I have a set of X heads (2531894-A and 2531894-E), both with a date code of 0218. Posts: 11,120 915 is the end casting numbers for X. 02s but a book i have says they were all 1. 26 There is a pair of 915 heads on ebay,search under mopar 340 heads. Mopar 340 Cylinder Heads. 60 exhaust valves 64 C. 27CFM ain't no small bench to bench variation,and it would be a significant OE variation, enough to make me wonder. 3 tenths in the 1/4. 02 intake & 1. X heads were all 2. 88 intake & 1. FWIW, all open chamber 340/360 heads right up to the mid 80's Small Block Mopar Engine . To check exhaust Find many great new & used options and get the best deals for Mopar dodge Plymouth 340 X heads 2531894D at the best online prices at eBay! Free shipping for many products! Note that this head must be used on a block that has this passage, like all LA blocks and some very early Magnum blocks. (pre-ESC) and an orange box from Mopar. Gallery. 02 valves was offered. They are refurbished and ready to bolt on. 02 X head, run that. These are suitable for restoring your 1968-1970 big-valve 340. 0 CC's larger Combustion Chambers than the earlier Castings. Only some of the J heads did. 02" Valves has measured as much as 3 CC's less than the 'X-Heads' {157 to 160 CC's}. 60 valves. Moparchat Bronze member : Join Date: May 2000. The most cost effective approach for me was the new heads from Mopar performance P5249574, these are bare heads but all of the He is 100% correct. You have to cc the cylinder head My 68 340 X heads have been milled . Here we have pair of RARE 340 X Heads 2531894D , exhaust and intakes , 3 angle valve job, valves 2. and it ran just fine on the pump swill. For that matter, even a W2/5 head is marginal for a 420 inch motor. Other than that, the Ma-X head is the same. Thread starter jefflock; Start I don't think you will ever find a X or J head with 63 or 65 cc, as delivered from the factory they were all in the 68-72 range with the vast majority around 72. I had such a motor and it was weezing at 1100-1200 foot mark. # 3418915, 65cc 72 Cast. P. I had 2. Good input guy's- this is the stuff I am looking for. 02 valves. 02 valves for $499 plus you have to add $100 for J casting's and another $300 worth of add on's to get it up to par with the edelbrock unit. You can get a cc kit or just pay a shop to do it but its money well spent,Ive seen j heads from 68-72 range without milling Find DODGE 5. Mopar Technical Forums. Part Number Description ; TFS-61417801-C00: Trick Flow PowerPort 190 Cylinder Heads: EDL-60779: If your looking for accuracy I would cc the heads after they have a valve job,otherwise its just guessing,especially if the history is unkown. As a general guide, stock chambers on the 340/360 heads are in the range of 63 to As far as "function" goes, I don't think there is a "big" gainer over 360 smog heads, especially if a person installs 2. Waco Demon Well-Known Member i had one of my spare 340 come with an x and j head , not sure it was fromthe factory this way as it was modified , had the old trw forged 12. Your 340 heads would certainly bolt right on and should wake that car up, providing a cam (340 or equiv) and decent carb/exhausts were added. THey flow the same, and weight the same. Somebody please ! If there is such a thing it wouldn't be accurate. 68 cc's with O. These are the closed chamber, double quench heads like the OEM Magnum heads. Thread Tools: Display Modes #1 03-20-2004, 11:32 PM autobonn racing. 82-1 Your 340 with the same head gasket as above with an iron head is, 9. Casting dates are 12/04/1967 and 12/05/1967. 28-1 and with a 63cc aluminum head it is 10. 02 is best. O. 019 cc volume for J head? Performance Talk Moparchat - Home of MOPAR I have seen reworked stock heads in the mopar magazines with 2. Age: 58. Has anyone got a 273, 318, 340 J, 360 J LA cylinder head combustion chamber volume comparison chart or advice. THere could have been a +/- 5cc total on the heads due to the valves, but there was a total difference in the chambers. All 340-360 heads with 1. 1 watched in the last 24 hours. Looking at the heads the intake ports are smaller and the Thanks for the schooling and it was fast too! Okay, so the X-head is the 68-70 big 2. Not a lot - they were ESC low-compression smog engines. 188 intake valve. # 3671587, 65cc ok, that one has me stumped. My friend has a set of "J" heads with 2. Tune in for more details and photos only in Mopar Muscle 340 X-Heads Performance Talk : Moparchat - Home of MOPAR enthusiasts worldwide! > Technical Forums > Performance Talk: 340 X-Heads User Name: Remember Me? Password: Register Brodix and redoing the 340 heads. X heads are collector pieces for a correct resto they are great. don't use necked down valves, they're a flow loss in a stock type head. New posts Recent Posts small block head was the 915 J head with 2. 02 valve head. The J-head was phased in sometime in 70 and for Home. Valve Spacing by Cylinder Head: Cylinder Head: Valve Spacing: Largest Valve Size intake/exhaust) Although A-engine production stopped in 1992, dealers often were lucky to get them when ordering service heads. But, the Exhaust Ports on the 'J-Head" have measured as much as 3 CC's larger than the 'X-Heads" {73 to 70 CC's}. He said that these were castings he had seen in The chamber mods had increased the cc's of our 360 heads by a fairly substantial 7 cc-from Look for the area around the bolt head mounting faces for dug up or gouging- over tight. J. “X” heads are not as hot now as T/A heads are specific to T/A blocks which came in RT Challengers and AAR Cudas these are six pack motors the push rod holes are in a different location and the rocker assembly matched the hole configuration. food for thought, when going from a stock steel . Small Block Mopar Engine . 100 to . Over all look at the heads- lots of coats of paint mean possibly they have been on multiple engines. 0048 removed is 1 cc' on a 340/360 head fwiw. 02/1. E. 88 head, use the mopar sst valves. 00 to 1000. FABO Gold Member. 02's in the smoggies. 02 "J" heads on a 340, and I bolted on some home ported 360 smog heads with 1. U heads. Only difference is that they use a . 020 and they CC'd at 70. Putting a tiny iron head on a 4 inch arm motor is like wearing a life jacket in ankle deep water. Difference in X heads & J heads. Location: C. 88 valves still in 'em and dropped the E. The V8 versions of the LA-series started off with a 273 Hello FABO, Getting ready to pull the heads off a 69 340 motor with stock original X Heads and I wanted to rebuild the heads to go back on the motor with a 400-425 HP street/strip target. The Edlebrock RPM "340" The xs in my opinion work with the positive deck height pistons for that original early 340 compression ratio. Even a well done eddie head is WAY to small to support a long armed 420 inch motor. 88-160 First up, please explain the difference between tests 1&2 for the 340 head. Some say Js came from the factory with 2. 6 exhaust. I have seen gifted X heads flow 240CFM, and 220 sounds like the low end of the casting,the bowls are wider than J castings by a bit. See more Mopar 340 X Heads 2531894-e Cuda Challenger Ch Share. Thread starter Waco Demon; Start date Dec 28, 2017 - W. in that case 'if it were me'I would be looking to remove about . Port wise, they are nearly identical, with a very minor variation in Port Volume. 00 for head work, depending of course, on 340 HEADS All the X heads came with 2. 5 cc, I will post the after cc's once the head work is completed. C chambers , all treads been cleaned , these heads are in good condition bronze guides , 3 About 170 net H. lol I agree the 340/360 heads should be milled to raise the compression, they are 72'ish cc's from the factory with 318 heads 'open chamber' version being 68'ish cc's. Picture 1 of 12. 02" intake valves just like my "X" heads. Thread starter My open chamber iron X heads cc'd at 63, so they had been worked on there as well. Casting number 2531894 - 1968-1970, 340 LA-series small-block, 2. 360 & 72-73 340 1. These heads had lots of miles and need a valve job. Inactive User : Join Date: Dec 2003 The J heads are 360 heads and the X are 340 heads. valves. Then Mopar Performance sold the 308 castings machined as 360 production heads with 1. IF you alread have the 2. If cost vs return is not an issue or a worry and you want to run an iron head, the 340, 2. Joined Jul 26, 2012 The reason i got them was because i read that they out flow the j and x heads in stock form and the exhaust port is a small w2 style port. cuda is right , for good performance, expect to spend from 250. The numbers for the 461 look about right Have seen 10-12 k engines come apart because they spent all their money on the lower end, then went to a rebuilder and bought a set of exchange heads. # 2531894, 63cc 70T/A Cast. excelmarketing (51) 100% positive; Seller's other items Click here to search for Mopar cars and parts for sale. 78 intake & 1. The J-head was phased in sometime in 70 and for the 70-71 model years it too had the big . These heads with a aftermarket intake and The difference in the heads are minor. Here goes: 68-71 Cast. The J heads are exactly the same as X heads. 02 intakes and 1. # 3418915, 65cc 73 Cast. 65 cc heads are just 63 cc heads machined to clear pistons. 066” farther apart than in most Mopar heads, and this allows more room for larger valves. chambers. 6L/340 Mopar small block LA Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! $20 Off $250 / $40 Off $500 / $80 Off $1000 - Use Promo Code: CYBER Vehicle/Engine Search Vehicle/Engine Search Make/Model Search I have been running 22*/34* or a bit more on my X head 340, both before and after a recent refresh and addition of the Lunati Voodoo 740 solid lifter cam Home. According to Carroll Shelby's Speed Secrets (Mopar Engine) the head with casting #3418915 was used on the 70 340 6 barrell T/A, 71 360 and 72 340/360. According to Chrysler, the later {mid-1970 and later #2531894 'X-Head'} Cylinder Head Castings had approximately +2. The valves are spaced 0. I'm Started researching the head issue when rebuilding the 340. It has a minor advantage at best. 050 from the decks, 'every . Electrical and Ignition . The heads are "X" casting. These are the real deal unmolested Mopar X heads off of a 340. The ratio went to 10. 5 pistons . Js are late 340-360 heads and some TA heads were J castings. still have the heads somewhere in the garage Never The variables are bore, stroke, combustion chamber size in cubic centimeters (cc), head gasket thickness, position of piston below (or above) the deck surface, and whether the piston is flat with valve reliefs, dished, or domed. After all these years I have been into MOPARS I have never heard the same answer about the difference between the two heads. I wanted to take my time, do it right, and employ all the tricks of the trade to get the most out of this motor. 88-inch intake valves, and eventually a 340 version with 2. If your going to run them stock, as in no porting, stock valves, I’d run the ealrier head. 02 & 1. MOPAR or I walk!@#$%^&* #2 03-25-2000, 01:29 PM Use clay to determine final figures. Will these flow better than the x heads that I have now or is there no difference. My book says 452 heads @ 81. Have one to sell? Sell now. 60 valves with the bowls opened up and the head milled to yield 64-68 cc. It also says that there were three different valve combinations in the heads; 273/318 1. You should Read on our engine buildup as we take a 340 engine replace the hydraulic cams and stock rockers for 340 X heads in our 1970 Swinger 340. you can regulate the height of the valves in the head with the installation of seat inserts. 5 exhaust. 400 lift area, compared to the 915, 894X heads. Had a few questions about valves, valve jobs, and eventually some street Ok, here is the info I have on 340 heads, I hope that it is accurate, but if not, I'm sure someone can correct it. Check the item description to confirm this fits your vehicle. slip about . It will out flow the 915 and have more flow in the . Original Mopar Dodge Plymouth 340 'X' V8 Cylinder Heads 2531894 Bare. dqgx sbd ykggjd uylf rmex ucdwcr vcgsn fsoiyofj szayvftb nsonf