alright im tearing into my 350. car is a 72 lesabre 350 original 2 bb . i have a 4bb iron intake from a 75. im going to port the intake dual plane mod as well. as for carb it has a edelbrock 4bb with an adapter on it. for now i will keep that carb but run in it on the new intake. i will swap to a efi unit when i get the money. so i want to keep this thing on regular 87 octane. can i run the ta 284 cam in this engine without mods? i have cam in storage but i dont remember the model. i think it is a ta but not the ta310 currently sold. i think it was an older unit they dont make possible the c310? the ta 310 currently is over kill so idk if im going to use it or just get new. i know roller cams and aluminum heads are the way to go but trying to not sink a fortune in it. i just want a good mpg driver i can run on regular gas that i can travel in. i have a 700r4 in storage as well which will go in. im trying to build it comparable to a modern car. a crown vic makes about 260 fwhp and weighs a bit more. charger about 350 and also weighs a bit more. if i could get in the middle of those run on regular gas and get similar mpg id be thrilled. i also have headers in going in and car has decent exhaust on it.
You will probably need a 4 barrel accelerator cable, since carb has more travel. Get an air fuel meter, to rejet the carb. Especially with headers. The 284 or 310 will be soggy or soft on lower end with the low compression of the 72 engine. And unless your gonna gasket match and “port” the heads to match intake, it’s not gonna gain much if not make low more end soggy . if your gonna do anything, change pistons, or mill heads .050-.060 to get around 9.0-9.2 -9.3 compression and advance cam 4 degrees. Use .050 shorter pushrods. Do actual bowl porting and race valve job for better flow. You will need a 2500-2800 converter depending on actual cam used. 700 has a very wide gear change from first to second. not my favorite trans. I would suggest a low gear set for the stock trans would be better choice then the 700 with the big tires and factory road gearing in rear axle. The overdrive itself will be too much drop in rpm at speed lower then 65-70 unless you change rear end gear to 3.42 or lower.
im going to be port matching everthing and a dual plane mode to the iron intake. im also going to swap a 323 and a posi in the rear. can i still run a 87 with the up in a cr? again i dont want it to be a race car just something i drive anywhere it will live at 70 mph more than it will any other time. it has a aftermarket 4bb carb it should already be set up for that. like i said it will probably go away in the coming months for a sniper or fitech. ive converted to hei as well. should i have bigger valves installed as well? the trans i know everyone will say get a 200-4r but to put it in place i will have to do alot more work than the 700r4 being its a b body car. other than a bellhousing adapter for 30 bucks from speedway its bolt in. i also dont want a huge converter. again road car.
The problem with low static compression is if you run a cam with much above stock duration is the Dynamic Compression Ratio really suffers, that hurts power across the board, especially down low. But, yeah, 87 octane should be OK. http://www.empirenet.com/pkelley2/DynamicCR.html
ok now i got to find a local machine shop to deck it. what about the valves? would i be better off with a smaller cam and not deck it?
Change front cam bearing and valve springs. Get a distributor recurve kit /a different distributor . The 72 has the lowest timing setups . Actually the 700 will require the most work to put in as far as I know . Have one that was in my convertible. Didn’t like it, has a 350 again.And the edelbrock is not set up for your engine. You will need to rejet. If you jet it correctly, and run conservative timing advance, 87 can be fine at higher compression ratios up to a point. I would not port match. Stick to valve guide and bowl area. Much less work/time and more gains. study this link Some decent information for buick porting https://streettechmag.com/2015/03/23/porting/ The crower level 3 works well advanced 4 degrees with lower compression. But as with any cam , they all make more power on higher compression. I would go with the 284 and some head decking. I think you will like it. It will still like a 2600 torque converter.
not in a 71-76 b body the trans is the same length as a 700r4 its the same th350 run in trucks not the one run in an a body g body or 77 up b body and has a huge tailshaft. 2004r requires a longer driveshaft move the crossmember or get new one. the only advantage a 200 has is the dual bolt pattern but a adapter is a alot cheaper than a new driveshaft or having this one retubed. i have a billet hei dist not the factory one. it runs pretty good with this edelbrock but yeah i can retune as needed. also i already have a 700r4. i have a 200 as well but its for my 66 so id have to find one. i do want a little lopey sound too lol ill prob take it to the car shows as well.
The 284 has better torque. You have a big car. Need. More low torque for that. The 212 I say is better if you like to rev the engine high . Find out what cam you have. Maybe it’s something we can work with. Otherwise I prefer the crower cam my self if you need to actually buy something. It sounds good, makes good proven power, decent mpg even with big gears. Does not need to rev high. High vacuum. do you have a converter for transmission yet?
yeah its the its from a 80s truck i think it stalls around 2k. i dont want a huge one to daily drive been there done that on a truck it sucks. whats the crower cam you speak of and specs. car to link it. the torque cam would be better id think. just a street driven car that just needs more guts to get out of its own way more or less. i have to go to my dads and get my wifes 4 wheeler so ill look and see what numbers it has on it. i got it from a member years ago but im sure that thread isnt around since the site updates.
700 truck converter is 12-1500 . And it’s a lock up so stall speed does not matter at Cruise. So get it up. https://www.crower.com/buick-350-compu-pro-hydraulic-cam-276-hdp.html 50258. Under 9.2 compression I would advance it 4 degrees. And it does pull to 5000.
it does in city traffic though so i dont want a huge converter. 2500 at most would be all i want. its not really about dead launch or anything with me. im more concerned with laying into it at 45 or so to go around a car things like that. also im trying to stay in the good mpg a big stall is going to eat that up iirc.
think it would be better than the 284 ta? would i have to change springs? and could i stay on 87 octane?
With any cam over stock you will need new springs. And with them being 50 years old they are already worn out.
daily driver/traveling car build so cheap gas and cheap on gas. 91 octane is 30 cents more a gallon. not trying to build a race car or anything . more get up just to keep up with traffic with ease is my thing. will never be on a track.
the ta 284 says stock valve train converter and gears are ok with it. so even if i needed new they should work with stockers and being inexpensive if im right?
I’m gonna suggest you Look at the 112 cam . This will fit the requirements you have stated .212 maybe an option The 284-88 needs 9.0 compression. It will have a weak low end without it.
well i dont care to mill them slightly if i can still run regular gas. 212 is my other choice just the fact it has a slightly more torque was my only reason for looking into the 284 or the crower.
