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92 truck block, with 0.40 pistons,GT40P heads with Crane 44308-1 springs (457lb/in, shorter) summit-1790 cam (.485 lift,274/274 duration,216 duration at 0.50 lift I/E, seperation 110),edelbrock dual plane intake with 600 edelbrock carb. my last issue (hopefully) is, how can i acuratley measure pushrod length? i have an legnth checker, but cannot come up with the same measurement twice. appricate any advice. been a while in this build.
Sounds like you're figuring stuff out. You could probably get away with a smaller carb and still make plenty power and save some fuel. Depending on intake and carb combinations you can sometimes make more low end torque with a lower CFM carb. The top end HP might take a small hit, but it just depends on what you plan to do with it. Personally I'd rather have grunt off the line than a few extra horsepower at redline. What are you going to be doing with it? DD, track, weekender?
my last issue (hopefully) is, how can i acuratley measure pushrod length?
You need to buy or make a solid lifter first to take the hydraulic adjustment range out of the picture, but before you go through that trouble have your heads or block been decked? If not then you just need stock length pushrods.
truck is primarley a daily driver. we do have a lot of woods and mud in my area of Ga. and my son and i like to play in it. but mainly road with a 6 ton goose neck trailer. the technictions at summit told me i needed longer p/r beacuse of the shorter springs and cam. when i start it, it sounds like an old singer sewing machine. my p/r legnth is 6.9 in. when i have the rocker tightend to 25 lbs the bolt is tight and there is very little play (very hard to spin p/r with fingers). when i first put it toghter i bent 4 p/r thats when summit sold me the shorter stiffer springs and said i need longer p/r.i sure am stumped.i have a feeling im going to have to pull motor and start all over from scratch. it sure is hard to love my truck.kind of like my kids, hard to make them do what there supposed to do.haha at this stage any advice,suggestions,tricks,anything would be great.thanks again. no the block and heads are stock. the block has been bored 040 over is all
truck is primarley a daily driver. we do have a lot of woods and mud in my area of Ga. and my son and i like to play in it. but mainly road with a 6 ton goose neck trailer. the technictions at summit told me i needed longer p/r beacuse of the shorter springs and cam. when i start it, it sounds like an old singer sewing machine. my p/r legnth is 6.9 in. when i have the rocker tightend to 25 lbs the bolt is tight and there is very little play (very hard to spin p/r with fingers). when i first put it toghter i bent 4 p/r thats when summit sold me the shorter stiffer springs and said i need longer p/r.i sure am stumped.i have a feeling im going to have to pull motor and start all over from scratch. it sure is hard to love my truck.kind of like my kids, hard to make them do what there supposed to do.haha at this stage any advice,suggestions,tricks,anything would be great.thanks again. no the block and heads are stock. the block has been bored 040 over is all
That's cause your tightening rockers down and is causing the lifter to collapse and that makes the valve train all outta wack.
went to pull truck in garage and no oil pressure. it has decided (truck) that i need to pull engine and redo it from scratch.new pump and gaskets through out engine.i think all parts are reusable.lesson learned,do more homework before changing engine dynamics. round 2 haha. thanks for the help will be back with more issues im sure.
Did you use the factory retainers and locks with those springs? If so that could be your problem, they may be compressing the springs more than necessary at the valve closed position which artificially limits the amount of travel before spring bind which will result in bent pushrods with high lift cams.
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