They had more compression back then, and had better fuel.ĩ.1 to 9.5 will require premium. Got to remember that chevy had a 350 horse 327, and a 350 horse 350 back in the day, stock from the chevy racing boys. Call the cam grinder and tell the salesman what your doing, 400 3200 to 4200rpm is obtainable.Ī roller isn't needed to get these numbers, but it does make it easier. Cam, headers, a good 650 cfm carb, and a good intake will get you there. Its quite easy to get 430 -450 horses with a 350 these days. It all depends whats in your budget.Ĥ00 ft-lbs isn't that hard to get to. So scoure the salvage yards and get a roller and rebuild it. Roller cams and lifters are expensive initially. But, if you find a good used roller motor to rebuild, your well ahead of the game. You can get roller like performance with a flat tappet by going to mushroom tappets. I find some that don't have enough radius on the lifter, so I send them off. I turn the motors over, and make sure all the lifters rotate as they should. When I assemble a motor, I drop all the lifters in, I mark the top lip of the lifters with a line from a MarksALot. You get a couple of hundred pounds of spring pressure transfered onto that lifter, even though they are hardened and it has lubrication, there is heat build up.
Not to mention the reduction in friction, and in a flat tappet cam, the rubbing is transfered into heat and wear, though its slight. On the roller cam, you will get a really good increase in performance because the opening and closing rates will be so much quicker than with a std. Now they are in short supply with the scrap prices so high. I always just pulled motors with good casting numbers from the junkyard, freshened them up and did the normal bolt ons.
It has 5.38 gears, may make it more friendly on the interstate.Īgain thanks guys. The motor doesn't have to turn as high so you don't have to freshen it up as often. I like to build torque, it makes up for the high gear. My 3.42s seemed a little low to be honest. A light car with the suspension set up right can get by with a higher gear as long as the engine has enough torque to overcome it IMHO. Let's say his car weighed 1000 lbs more? He should have still blown me away. He stated and I can't remember but it seems like he had near 200 hp more than I did. I just don't pay a whole lot of attention to low gears.
Not trying to brag probably every fellow here has a faster car than me. Said he had a twin turbo callaway and had never been beat. Raced a fellow in a corvette and striped him several years ago. It is 2200 with a stockish 68 chevelle ss 350. I think the ford rear in my 30 3 window is a 2.79 behind a th350. Just a stockish 327 vette motor and it's a little screamer. I have the same in another bucket but it has a th350. If you want to just cruise and go.stick with the dual plane intakes. But that is only if you really like to fiddle with things. If, If your good at tuning, you can get a older single plane intake, you will loose just a touch of torque at low rpms.but what you would loose just off idle, you'd more than pick up in midrange. Also, you can play with a carb spacer and pick up a few horses there too. Remember, if performance is your thing, degree the cam in, make sure your cam walk isn't excessive, you can pick up 3 to 5 horses there. A well matched motor will often time smoke a hotter 'built' motor on the streets if its in tune. The main thing is to match your parts, which is already done. The Thumpr's are fairly mild, they just mess with the overlap, etc., to get that sound. Another good one is The 268 High Energy.and if you want a good basic jump in horses and want the hotrod idle, go with a Thumpr Cam. Good cam, if your going mild with a dual plane and a sm. I really like Lunati, the VooDoo as you were told are pretty mild. I agree with Ron.depends on your rear tires, since your going mild on the motor.
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