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try running it without the accessory belts... could be harmonics from something in the front.

sounds to me like it is in the trans. possibly a worn converter hub bearing, or a broken converter... could also be the front pump of the trans. good luck!

i would find a stock set and have your block align bored/honed. either way your going to have to align bore it....

true. the 340 i had in there was to break in the turbo kit and make sure it was sound...after about 1500 miles, the non boosted built 340 said NO MORE! after the 416 went in i had no problems. i just put gas in it and drove it!

yup! like i said... i beat on it for 8 years before the turbo went on it then it took another 2 years to break it! i have them im a w2 headed 416 that i built for a buddy of mine. the engine in his 71 dart. beats the hell out of it, drives it to the track runs low 11's (it would be in the high...

she broke as soon as she hit boost... about 25-2700rpm... the piston didnt touch the head at all! the rod broke at the small end, swung around and just broke the hell out of everything! the engine was not built for boost at all! nothing was right for psi... it was what i had so i made it work. i...

i broke one... but it was when i had the 340, 740gram trw pistons, and 10#s of boost making 640 rwhp. nasty break too... broke the cam, block, starter, oil filter relocater, and oil pump/pan! i knew it was a ticking time bomb, i beat the **** out of that engine for 8 years before the turbo kit...

months of tuning?? my carb was almost perfect right out of the box! 1 jet change... you buy the right parts, you get great results!

416 blow through(73' 340 block)... 900+ rwhp, 93 oct, 3:23 gear, drive anywhere....

i only wish i could have taken her down the track myself...

lmao!!! i told him to drive the car for a while till he get the hang of it... i drove it for 2 seasons with the big engine and i didnt have the nerve to stay in it! the 2nd to 3rd shift was brutal even with the 3:23! i was almost going to go down to a 2:94! she got to 7k very fast!

no i am not kidding. my car was a street car. no cage, 93 oct pump gas, 15#s of boost, and drag radials... ask anyone that has seen my car. i never took it to the track because it dont have a cage. i have no idea what it would run...

i have to let you know what old my turbo dart runs when the new owner takes her to the track. i had 3:23's w/ a 28'' tall tire. im sure she'll be low tens high 9's.... she was making almost a 4 digit rwhp # too;-)

so true! i love the sound of a solid flat tappet cam! thats all i run...

yup. cam/rod broke the block 2 years after i boosted the 340. i knew it was a ticking time bomb but it was a great engine!

forced induction or n/a? my ''340'' 416 is making a little over 1100hp/1050tq flywheel (935 whp/895wtq) with 15#s of boost @ 6700 rpm... my 340 before the turbo made 440 whp/473 wtq @ 6400rpm. both engines power #'s were with 93 oct pump gas.

every m.p. solid cam kit i have installed have had the exact same lifters with the yellow tops... that tells me you probably have a purple shaft cam and the lash should be .028 intake and .032 exhaust (HOT)... just thought i'd throw that in...

i totally agree that 1.88 heads are great for low end.... im just saying i wouldn't put them on a 340 that i purposely building... i also agree hes got a lot of mis-matched parts going on!

the comp was also lowered..

340's like 2.02 heads with a cam, headers, and big exhaust.... im not saying its killing it, but i wouldnt run 1.88's when im building a mild 340....... they came with 2.02 heads stock!

1.88 heads are not helping any... sounds like a timing/gear ratio issue or your valves are too tight if you have adj. rockers. u dont have to pull the cover to find out the gear ratio....all you do is mark a spot on your tire as well on the pinon yolk, rotate the tire 1 complete time and while...

you are going to have to get the lower end balanced no matter what crank you go with... also a good set of .040 pistons are harder to find then say a set of .030 set... i wouldnt trust someone saying "the machining is done and its ready for assy."! you still need to check and adjust ALL...

X3!!!! head bolts dont leak oil.

im using a 73' 340 block that has been 1/3 filled, 4 bolt splayed billet mains, a crank gurdel (i spelled that wrong), and a whole lotta good strong parts!

o ok.. i missed that part. no this # is with my new engine... the engine that is in my car now...

thats the first thing i would do.... put a stock volume pump back in. especially with a stock pan...

do you have at least a 7 qt. pan with that h.v. pump? could be sucking the pan dry especially if your pick up to pan distance is too much....

my 416 makes 935rwhp which is about 1100 at the flywheel @ 17#s of boost on 93 oct.... i wasnt sure if you could go forced induction...

thanks a lot guys!