update on my 3.7

[smokeonthewater]

if that edelbrock is a carter, I'd go with it

[spareparts]

keep in mind, you can't properly balance a four cylinder engine without a balance shaft, if you stroke that engine, its going o really shake, and there's not much you can do about it. did you ever come up with an aftermarket cylinder head for it?

[Destroyer]

Hey Aussie! I can't help you worth a dime on your rebuild, but it's good to see you. How are you doing health wise?

[aussie]

Originally Posted by Destroyer

Hey Aussie! I can't help you worth a dime on your rebuild, but it's good to see you. How are you doing health wise?

hi des just you making a comment makes me feel at home havent been on here for a while still feel like a outsider on the health side both hips are done the heart seems ok had a little scare 4 weeks ago finally got my brain tumor rescanned and it was fine no growth in 8 years but my blood tests came back and my iron level was way to low and i was anemic my doc said ill be straight out with you it could be bowel cancer being so low in the iron had some camera work up my *** and down my throat and thank god all they found was a bug growing in my gut a week on a few different anti boitics and im all clear so you wont be hearing much moaning from me only when my wife gets in my face lol

[Road King Cole]

Just the other day I was thinking "hmm, haven't heard from crazy assuie in a while, hope he doing OK as warm weather should be coming his way".

Glad you are doing well!

rkc

[Destroyer]

Originally Posted by aussie

hi des just you making a comment makes me feel at home havent been on here for a while still feel like a outsider on the health side both hips are done the heart seems ok had a little scare 4 weeks ago finally got my brain tumor rescanned and it was fine no growth in 8 years but my blood tests came back and my iron level was way to low and i was anemic my doc said ill be straight out with you it could be bowel cancer being so low in the iron had some camera work up my *** and down my throat and thank god all they found was a bug growing in my gut a week on a few different anti boitics and im all clear so you wont be hearing much moaning from me only when my wife gets in my face lol

Glad it was just a bug and that it's been killed. My friend, if I should ever get to Australia I expect to get the deluxe .50 cent tour from you, so take care of yourself. Cheers mate.

[spareparts]

the issue with balancing a 4 cylinder engine is that you can't completely balance one with using a balance shaft. I had my machinist explain it to once, but i still didn't understand what he said. It has something to do with harmonics or something. Most four cylinders are balanced close, but not perfect like you can with a V8. Same thing with some of the V6's, that's why they had the shake issue between 1400 rpm and 2500 rpm. They installed balance shafts on The V6's and it fixed the issue. Some overhead cam engines have weights on the cam shaft to help smooth the engine out. On your 3.7L they shake quite a bit to begin with, I think stroking it is going to add to the issue. Personally, I'd run the 4bbl intake with a Quadrajet(I like them), put the edlebrock head on with a good set of rocker arms. I don't know whats available for a cam shaft, but just running something better than the stock rockers should give you more lift than came from the factory. I think you'll be surprised how well it runs with this set up

[aussie]

ok i do understand about the counter balance shaft Mitsubishi had them on there 4 cyl run by a small timing belt and it broke and wasnt timed propley it would make the car vibrate in a funney way almst like the muffler was gone .thanks for that i havent spoken to him but ill do some research on it and i only want 5000 rpm or close enough i want a torque engine with the carby i dont like the small primaries and large secs and i have never rejted one i do all my fine tuning using a oxy sensor to get the fuel and air ratio correct thanks for your advice

[aussie]

Originally Posted by spareparts

the issue with balancing a 4 cylinder engine is that you can't completely balance one with using a balance shaft. I had my machinist explain it to once, but i still didn't understand what he said. It has something to do with harmonics or something. Most four cylinders are balanced close, but not perfect like you can with a V8. Same thing with some of the V6's, that's why they had the shake issue between 1400 rpm and 2500 rpm. They installed balance shafts on The V6's and it fixed the issue. Some overhead cam engines have weights on the cam shaft to help smooth the engine out. On your 3.7L they shake quite a bit to begin with, I think stroking it is going to add to the issue. Personally, I'd run the 4bbl intake with a Quadrajet(I like them), put the edlebrock head on with a good set of rocker arms. I don't know whats available for a cam shaft, but just running something better than the stock rockers should give you more lift than came from the factory. I think you'll be surprised how well it runs with this set up

spares i spoke to my mate at the shop and he said theres no reason why it should vibrate more only if i do a crank swap

[aussie]

ok the stroking part has been droped but i am going to buy some good conrods there not much more than doing your own---i finally took the timing cover of camshaft and crank so there all waiting to get machined and balanced --with the harmonic balancer i tried a cleveland one on it it fits fine and it even feels a little heavier i will buy a new one that has the removeable conterweight as these engine are internal balanced--i also need to ring crow cams about grinding the cam into a solid profile--i did try and get a unmachined cams from some cam places in the us but they didnt want to sell me one so im stuck using a regrind which im not to keen on---im going to have the old cam read to see what the specs are on it so i have some idea what it had---these are the specs im thinking of using its a comp cam 270s grind

Comp Cams #249-12-222-4

Magnum 270S Mechanical Flat Tappet Camshaft
Lift: .468"/.468"
Duration: 270°/270°
Lobe Separation Angle: 106°
RPM Range: 1500-5500

these are the head flow rates



i might increase the lift to 550 or 600 to get the flow benifits of the head but ill see what crow cams suggest and i will get a secound opion from wade cams too

im still thinking of cutting off the water pump shaft of the camshaft and getting the hole in the timing cover welded up and using a electric water pump as for the delco alternator thats going in the bin i got a 60 amp bosch that will do the job

the engine compartment is going to be painted in color flec and i have put the paper air filter under the bench and i am getting a flame arrestor one as you guys sugessted

will be posting pics and more info as its done and with the harmonic balancer it looks like all the lugs on the timing cover that held the old charging system will need to be machined off to fit will add pics when its done