I have some good experience tuning the 231 HEI - I'm running 35 total mechanical advance, and am running manifold vacuum to the distributor. So, I guess I'm looking at a stock or a crower 2 cam. Hoping to get away with a hone and re-ring, rebuild of oil pump, and HEI on the 350-2V. With all that being said, the intent is to create an all-around vehicle, with reliability, efficiency, and torque the driving concerns. In other words, idleing at 800-1000 would get me about 1 mph. Offroad, it is used primarily on fire trails, but with the 6.55 granny low and transfer case, I'm looking at the capability of a crawl ratio of about 54:1. I get a LOT of looks in the old Jeep passing folks in the left lane on the highway. It tracks straight with 2 fingers on the highway at 75mph (I installed YJ Wrangler leaf springs, Saginaw close ratio power steering, and all new front axle hardware - balljoints, tie rod ends, etc.). SM 465 has 6.55 granny low 1st, then the gears almost match what I have in the T14: 3.58, 1.7, and finally 1.0. Outstanding! You guys are a wealth of knowledge.Ĭurrently running a 231 even fire with a T14 3-speed and Dana 20.īuick 350 will be mated to an SM 465 and Dana 20. 377/.392 I/E valve lift 1.55 stock rocker ratioĢ70*/293* duration duration LSA I/E centerlines LSA I/E centerlines equates to a 1.75* retard setting and 3.25* advance anyone see why this camshaft confused me earlier on when I was trying to learn camshaft basics using this as my learning foundation? lol Stock cam has asymmetrical lobes, so the timing is all over the place depending on the lift of the lobes. Overlap is is -15.0 BTDC ( - indicates ATDC) Here's the stock specs for is 19.0 BTDC ( - indicates ATDC) Cheaper, and it comes with the master rebuild kit along with the proper timing gear/chain which you just bolt right up, no fussing over indexing errors, etc. While that Isky cam is probably better for idling over big rocks with a 3000 RPM redline, the combustion cycle isn't as well suited for a better overall usage cam.Ĭlick to expand.Stock works too. Your knowledge and opinion here are highly respected and appreciated) (It's awesome to see your point of view though Paul.
While I'm not saying it's a poor choice, it would be best suited for a more specialized application for strict off-road use. This also has its limits, and as said before, may not make that big of a difference with such a small cam and carb. Much less than that and it probably won't make that big of a difference because the engine will only idle so slow.Įnhanced exhaust evacuation will help with fuel economy because it helps to offset the combustion contamination on the intake cycle, which equates to more efficient use of the intake charge. The Crower level 2 already has a 39 degree overlap which is pretty tiny compared to the stock cam's 53*. Gas mileage is determined by more than just IVC points and overlap. With the straight pattern design and super tight LSA the engine would fall on its face after its peak torque and would be better suited for a tractor with a governor to regulate its max RPM.Įxhaust evacuation would also be hindered, but probably wouldn't matter as much on a cam so small coupled with a 2v carb. "Compression" could be between 8:1 and 9.5:1 for use with regular up to premium pump fuel, depending on compression.Ĭam should produce some impressive low-mid range torque with a 2v setup.Ĭlick to expand.While that Isky cam is probably better for idling over big rocks with a 3000 RPM redline, the combustion cycle isn't as well suited for a better overall usage cam. With early intake valve closing points makes for better compression stroke and more efficient use of the smaller intake charge, while exhaust evacuation is extended for a thorough combustion cycle and effective low-RPM efficiency. With a 2v setup, torque will come on sooner but power will begin to trail off more quickly, with a shift point (for racing) at around 4300-4500 RPM, depending on size of 2v carb. With a powerband firmly within 1500-4000 RPM range and (for racing) shift points between 4500-4700 RPM (for a 4v setup), this cam should idle even smoother than the stock cam at an even lower RPM, with more vacuum. 434/436 valve lift 1.55 stock rocker ratioĢ02*/210* I/E duration I/E duration LSA advance installįor an otherwise stock 350-2v with 9:1 advertised compression, this is your cam.