Guest Anonymous Posted February 20, 2002 Share Posted February 20, 2002 well, i got some good input about the engine i acquired the other day, but i need to know more detail...what kind of hp & torque can get out of this engine...still driveable though...is 300-350 even plausible? i'd like to have more, but i know that's pushing it. i have found out that it is bored .030 over...not alot, but the engine is all there, ready for rebuild...just wanted more opinions...hopefully good ones! thanks, jason Quote Link to comment Share on other sites More sharing options...
Mike C Posted February 20, 2002 Share Posted February 20, 2002 It is possible to get 300hp from a 307, but I would spend your money on a 350. The added cost of the 350 is offset by being the cheapest to buy hard parts for like pistons, rings, bearings while the 307 is one of the least common small blocks in terms of years produced. The 307 will never flow well because of its small bore and you are limited to 1.94" intake valve. Nothing inherently wrong with a 307, it was GMs first attempt at a torquey economical motor that morphed eventually into the 305. (307 is same stroke as 327 and 305 same stroke as 350. 307 will make more HP than a 305, but so will a 2.8 ) Quote Link to comment Share on other sites More sharing options...
biohzrd Posted February 20, 2002 Share Posted February 20, 2002 the 307 is kind of a mule. tou can get 300 hp out of them as you can any v-8. with the abundance of 350 blocks out there i'd probly try and find one of them. like the old term says" there is know substatute for cubic inches" Quote Link to comment Share on other sites More sharing options...
denny411 Posted February 20, 2002 Share Posted February 20, 2002 If you find a good 350 block without a crank you could use the crank from the 307 to make a 327. you should have it balanced anyway so thats not really an extra cost Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted February 20, 2002 Share Posted February 20, 2002 Don't waste your time with a 307, I have a 383 sitting on my garage floor, if you want some more cubics, it was built by a local machine shop, ARP bolts, JE piston, Pete jackson geardrive, Fluidamper, all good stuff. I'm here on Camp Johnson as a Diesel Mechanic Instructor, but will be leaving for Okinawa in about two months, its just going to sit till I get back, I also have 4 Z's a 73 240, 77 280z, 74 260, also a backhalve 77 280. We should hook up. Jack Quote Link to comment Share on other sites More sharing options...
Moridin Posted February 20, 2002 Share Posted February 20, 2002 I know I sound like an idiot to some of you for asking this, but what's the difference between a 305 and 307? Is it the .030 over? One other question for those of you that can stand me, what exactly would be involved in putting a 307(305 if there the same) crank in a 350 to make a 327? Would it be the same bore to stroke ratio as an actual 327 put in early Cameros and such? Lastly, would and of you recommend doing this? Thank you very much for your time, Ryan moridin2004@hotmail.com Quote Link to comment Share on other sites More sharing options...
Guest Night_rider_383 Posted February 20, 2002 Share Posted February 20, 2002 There's alot of diff in the 305 and the 307. One is the bore and stroke. The 307 is 3.875'' x 3.25'' stroke the 305 is 3.750'' x 3.48'' stroke (same stroke as a 350), the crank's damper is a diff size (i think). So if you wanted to make a 327 you would need a 350 block and use your crank, useing a 305 crank would just make a 350. Useing this custom combo to make a 327 wont be really no diff than building any other performance sbc and your bore/rod/stroke ratio will be 100% the same as the true 327's. The ratio is based on what your bore size is, what your crank stroke is, and what your rod lenght is. The old 327's used a 4.000'' x 3.25'' with 5.7'' rods yours will be the same Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted February 20, 2002 Share Posted February 20, 2002 I would love to meet ya jack...I am only a few minutes away...I'll drop you an email...laterz thanks for all the input guys, just ready to get this show on the road...probably gonna go with a different engine... thanks jason Quote Link to comment Share on other sites More sharing options...
Mike C Posted February 21, 2002 Share Posted February 21, 2002 Even though the stroke is the same, crankshafts for different displacement engines have significantly different counterweights because of the differences in piston weight from bore to bore. You can use either the 307 or 305 crank in a 350 block to make either a 327 or a 350. The 307 crank will be easier to balance than the 305 because the bore is larger thus the pistons heavier. Figure on spending double what a standard balance costs if it needs Mallory Metal added. It's just hard to beat a 350 power per dollar since parts are SO cheap. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted February 21, 2002 Share Posted February 21, 2002 Hey guys, thanks for all the input...huess i'm gonna search for a new engine...no big deal. Michael Jackson, contact me at 910-478-0417...I'd like to get together this weekend or sometime...my schedule is fairly open... thanks alot guys... Jason Quote Link to comment Share on other sites More sharing options...
Guest 77vegasz Posted February 27, 2004 Share Posted February 27, 2004 My first Z motor was a 307 from a Nova. It was tired and I had it bored .030 over with flat top pistons I ran 64cc heads with 1.94 and 1.5 valves. I ran a 350hp 327 cam, Weiand xcelerator intake with a 600cfm Holley carb. The car ran its ass off and was alot of fun. I agree that as cheap as 350s are, the extra cubes are a good idea, but the point is that a 307 can make some decent power and best of all be alot of fun. Jon Quote Link to comment Share on other sites More sharing options...
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