Shnalla Posted November 12, 2012 Share Posted November 12, 2012 Hi, I want to wake up my 1972 stock L48 engine. I do not want a race engine, just something a Monte Carlo deserve . Everything is stock for now (just a true dual exhaust). I'm going to put aluminum heads ( 64cc, 2.02 / 1.60), keep my stock pistons for the moment. I need advice for a good low end torque intake manifold and a cam that keep the drivability. (Sorry guys for my bad english, I come from France...). Thanks ! Quote Link to comment Share on other sites More sharing options...
MCfan Posted November 12, 2012 Share Posted November 12, 2012 Hi, Romain, Actually, your English is as good or better than many of us use when we post on this site - and we don't have the excuse of living in France! Sorry I can't help answer your technical questions, but there are plenty of other members who are qualified to do so. I'm sure you will be hearing from one or more of them soon. Meanwhile, welcome to the club and good luck with your engine revitalization project! Quote Link to comment Share on other sites More sharing options...
dbreese Posted November 12, 2012 Share Posted November 12, 2012 Your english is just fine. Check out the for sale section. Crazy Dave, a very trusted member here, has some heads prepped and ready to go and can match you up with a cam/lifter package that will wake that s/b up. The heads are just right for a street cruiser and would fit your needs Just PM him and he will get back with you. Do you know your rear gear ratio? David Quote Link to comment Share on other sites More sharing options...
Shnalla Posted November 12, 2012 Author Share Posted November 12, 2012 Hi, Romain, Actually, your English is as good or better than many of us use when we post on this site - and we don't have the excuse of living in France! Meanwhile, welcome to the club and good luck with your engine revitalization project! Thank you Dennis Originally Posted By: dbreese Your english is just fine. Check out the for sale section. Crazy Dave, a very trusted member here, has some heads prepped and ready to go and can match you up with a cam/lifter package that will wake that s/b up. The heads are just right for a street cruiser and would fit your needs Just PM him and he will get back with you. Do you know your rear gear ratio? David No, I will check the build sheet to decode the rear gear ratio. I guess it's the most common one... I know something like 3.31 would help, but i do not want my engine to run too high at cruise speed Quote Link to comment Share on other sites More sharing options...
Mikstudie Posted November 12, 2012 Share Posted November 12, 2012 Welcome aboard... Low end torque??? Buy A Chevelle... Quote Link to comment Share on other sites More sharing options...
Shnalla Posted November 12, 2012 Author Share Posted November 12, 2012 Welcome aboard... Low end torque??? Buy A Chevelle... Ahahah ! No way ! (sorry Chevelle enthusiasts ) Quote Link to comment Share on other sites More sharing options...
Shnalla Posted November 13, 2012 Author Share Posted November 13, 2012 Any other advice to wake-up my sluggish L48 with a good cam and a good intake ? btw, what's the difference between un single and dual plane when it comes to low end torque ? Quote Link to comment Share on other sites More sharing options...
monte70car Posted November 13, 2012 Share Posted November 13, 2012 Dual plane is ideal for low end torque where the single plane will work best for a racing application. For a torquey style cam I would say to get in touch with some cam companies and tell them what you are working with and what you are after. Quote Link to comment Share on other sites More sharing options...
Sam (Bones) Posted November 13, 2012 Share Posted November 13, 2012 a gear change will work best for bottom torque, I'm betting you have a 2.73:1 gear ratio Quote Link to comment Share on other sites More sharing options...
Shnalla Posted November 13, 2012 Author Share Posted November 13, 2012 a gear change will work best for bottom torque, I'm betting you have a 2.73:1 gear ratio Sam, as I said before, I do not want to change my gear. I want to keep low rpm while cruising. ( Here in France, most of our highway are limited to 80 Mph... ) Quote Link to comment Share on other sites More sharing options...
CrazyDavey Posted November 13, 2012 Share Posted November 13, 2012 Hi, I want to wake up my 1972 stock L48 engine. I do not want a race engine, just something a Monte Carlo deserve . Everything is stock for now (just a true dual exhaust). I'm going to put aluminum heads ( 64cc, 2.02 / 1.60), keep my stock pistons for the moment. I need advice for a good low end torque intake manifold and a cam that keep the drivability. (Sorry guys for my bad english, I come from France...). Thanks ! Hi Romain, for one of my previous Monte's I did the same thing as you're looking to do. For an intake a simple dual plane will be the best choice, something like an Edelbrock Performer would be fine. For a carburetor I wouldn't go much bigger than a 600-650, I prefer a Holley but some guys like the Edelbrock series carbs. I good exhaust system will be necessary, if you put more air and fuel in you have to get it out. Some 1 5/8" headers and a clean 2 1/2" exhaust system will do the trick. You need to give the gears some serious thought, I know you don't want to hurt your high speed cruising but you don't have to. I'm guessing an L48 probably has a 12 bolt so could be 2.56 or 2.73 in there now. Going to something like a 3.08 won't hurt your cruising and will help "wake it up" a ton. I have those exact heads available and can help you with a cam and lifter package if you don't have them already, just let me know if I can help...Davey Quote Link to comment Share on other sites More sharing options...
Mike 57 Posted November 14, 2012 Share Posted November 14, 2012 I have to agree with Dave. A little more gear would help. Small runner heads, and dual plane intake, A cam for torque, Small tube headers and dual exhaust. Good luck with it! Quote Link to comment Share on other sites More sharing options...
72 LS5 Posted November 14, 2012 Share Posted November 14, 2012 ....and timing! Running 12-14 initial and about 34 total, all in be 2500 rpms helped a ton on my first 350 Monte. Vacuum advance, too. Quote Link to comment Share on other sites More sharing options...
stangeba Posted November 14, 2012 Share Posted November 14, 2012 Not an easy improvement but replacing the THM-350 with an overdrive transmission will help at booth ends. Almost all vehicles built since the mid 1980's have had an overdrive. Bruce Quote Link to comment Share on other sites More sharing options...
Shnalla Posted November 14, 2012 Author Share Posted November 14, 2012 Thank you all ! I bought a (brand new) 2 1/2" exhaust system before the car leaves US For the carb, I do not want to bigger than my Quadrajet. (maybe rejet it if needed). Ok for a simple dual plane intake (it was my first idea). For the heads, I have to find a great price, taxes + shipping are a pain in the a** ! I have found these heads on jegs... Maybe not the best i can find, but it should do the trick ! And of course, a HEI and a good recurve and timing ! Quote Link to comment Share on other sites More sharing options...
Shnalla Posted November 14, 2012 Author Share Posted November 14, 2012 BTW, how much cost a "gear conversion" (2.56 to 3.06 for example ) ? Quote Link to comment Share on other sites More sharing options...
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