Re: 427 ci (good motor?)
quietcat<br /> no worries. it kept us confused back when I had to fix them
. especially when the 402 and the 400 CID motors were released. and one version of the SBC had a different bolt pattern on the exhaust ports. I cant remember if it was the early 305 V8 or the 307. but the aft bolt hole was spaced different from all the other SBC heads in production. another problem we had was the 305 and the 350 cranks carried the same forging numbers but were balanced differently. got difficult to tell them apart sometimes. and the sbc400 came with 2 core plugs or 3 in the block depending on year. about the only way to sight ID the 400 from the reast was by looking at the block near the head surface. if it was flat from end to end it was not a 400. if it had 4 bulges it was a 400. the 402 was based on the 396 MK IV motor and without measuring the bore and stroke could only be ID by a block model number. the early run big blocks used a grooved rear cam journal for an oil passage. usuing the wrong cam would lead to an oil failure. other than the groove it would work. we grooved many cams so we could add power to an early 396.<br /> sometimes I have a strong desire to get back into hotrodding and automotive machining. thankfully I am usually sober by morning and the thought has passed
<br />but I bet with todays fuel controls I could build a motor that had some weywoes
<br /> fastman<br /> your rapidly approaching the limits of your setup. most the mods your looking at,sans the blower, are going to increase power by increasing RPM's. now your final drive ratio will have to change as well as the prop desighn.<br /> 400 HP with a well built 427 is easy. no blowers or wild mods needed. 600 HP is reliable and still normally asperated. anything over 600HP will need a dry stack type exhaust.<br /> by the time you prop it to take advantage of the 400HP your drive will puke regardless of your right arm. I imagine by the time you prop it to take advantage of what you have now it will puke regardless. a well put together 427 stock at about 350 HP will sing at 5500 RPM for hours if the cooling system and fuel systems are up to it. the alpha drive cant handle the loads the 427 can give it if the engine was assembled correctly. it aint gonna happen.<br /> there are some speedmaster drives that will, kinda. beaware the speedmaster drives and the blackhawks can take a lot of fun out of boating while lightening up your wallet.
