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Chevy 383 Roller Build (cont.....)
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I went with Moroso for my pan, pump, and pickup. Pump is a Melling big block pump. It takes a little more power to turn, but it is WAY smoother than the small block pump. Just be sure to get the shorter distributor/pump rod, as the big block pump's shaft is taller.
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There are as you know a number of variables involved with this.Not that it matters much,but who's crank did you buy??. Just a question in ref to machining tolerances. Take nothing for granted.Measure everything.What does the crank manufacture tell you the clearances should be given your application??. Sometimes given who's crank you bought you find you have to use two different bearing haft's of different sizes to set the clearance's you want.
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Bottom of page. As said, double check with manufactures. |
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All of you skeptics make valid points which all boil down to this: You have to know what you're doing. I do. I've said my peace, so I'm done here. Do what ever you want. Bye.
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In terms of bearings,you want to get ones that have a high embedment(sp) rating.Kings bearings are extremely round,good materials,and have that high embedment rating.They cost more,but I think they are worth it. |
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11:1 on pump gas or add more gasket?? |
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As far as oil pumps go, I always take them apart before brazing the pickup to the pump. Also, I take the spring out and replace it with the Corvette spring. I get 60 psi at hot idle and no fluctuation (because of the big block pump having more flutes on the gears). The big block pump also is equal to the small block high volume pump.
As far as bearings, I use Clevite 77 on a hardened, stock (not reground), or nitrided crank. I use aluminum bearings on a crank that has been ground and not re-hardened or nitrided. |
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Barry.We have had a boat load of combo's over the yrs.The reason why is we have a racing operation turn into a business where we where racing a 9.90 car for a yr and flip selling them. before this came to past we had a 69 Camero that we ran with BBC's in it.We went through hard times with that having 5 different BBC engines in the car in 4 weeks.All of them damaged beyond repair.We sold everything,car,trailer,parts,everything except the tools and seat out from active racing for two yrs.During that time we still,well really developed,a trade in selling parts and realized a market for selling the race cars.But those hard times almost ended active racing for us.
When we came back on line with a race program we still feeling the sting from BBC's started back using SBC's. Here my point.All those engines and up to last season's BBC 632 and the yr before back-up 565 BBC,all we used was Kings bearings without a single failure. It is that company that we used for all the hard core race engines we have built for people over the yrs as well.It's for that reason I have such a strong endorsement for that company. Also we have won a national and a whole bunch of track and regional events with them doing hot laps in the finals. |
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Hi, It seems that some posts got sent to my email and got lost on this site. I had asked somebody's age (to determine their experience) and they replied that they were 9 years older than I.
. Replying now to another post: I have nothing against King Bearings. I just have no personal experience with them. I went with the suggestion in "How to Hotrod Small Block Chevys" back in the early 70's. That's how I cam to use Clevite 77 bearings. |
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Small Block Chevys seem to run okay as long as they have 40 psi at hot idle. I had a machinist make a mistake on a crank once, and the hot idle was only 25. It went downhill little by little, and by the end of the month only had 10 psi at hot idle. I gave the machinist Hell over that and also gave him some not-so-good PR. Some speed shops took my word for it and took their business elsewhere after that.
. Small Block Mopars like higher oil pressure, such as 60-80 psi at hot idle. It is because of the way the oil passages route inside the block. There is a fix that involves putting an oil bypass line in the valley, but I don't like doing that. If anything breaks, you can't see it until the engine goes south on you. I still remember the external copper top end oil line on the old "Y" block Fords that would work harden and break. Oil went everywhere. What a Mickey-Mouse outfit that was. "Have you driven a Ford lately?" lol |
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oil pressure at idle,,,
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Gotta question for ya guys... I was looking to get the AFR 195cc street heads but seen that jegs and edelbrock have their own 195cc heads with 64 cc at a lower price. The way I see it if they all have the same specs will they all give me the same results. If I can get a pair a little cheaper I will as long as I get the same result but not sacrificing quality taking in consideration that jegs and edelbrock are good brand names and have a good reputation.
Thanks guys for the help.. |
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