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  #46 (permalink)  
Old 05-08-2013, 01:31 PM
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Originally Posted by ss307 View Post
I've decided to sell the 400 rods and use 5.7" Eagle rods with Keith Black 307 Flat Top Pistons(283 pistons have to high of a compression height to use with the 5.7 rods and the 307's 3.25 stroke). I'll have a 10:1 CR with the 416 heads. I'm using a Weiand 7504 intake and a Holley 600 CFM. What cam should I use? I can't make up my mind
You started off saying +0.060" on the block bore. What size is it now? If it's stock at 3.875", could you back down to boring it +0.030" instead of +0.060"?
Is the block deck height stock right now at ~9.025"? You said the heads have been cut. Do you know how much?

By the way, if Crower posted an operating range of idle to 6000 on any of their cam grinds, then shame on them. An engine may operate from idle to 6000, but it will not make useable power from idle to 6000 with any one camshaft. The camshaft operating range, where it makes power, is normally 3500 to 3800 rpm's, like from idle to 4500 or 1000 to 4800 or 1500 to 5300 or 2000 to 5800 or whatever. I just wanted to make that clear so that others reading this thread will not get the wrong idea and think there is something magical about Crower cams that permits them to make power over a 5200 rpm range (idle to 6000).

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  #47 (permalink)  
Old 05-08-2013, 08:10 PM
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Quote:
Originally Posted by techinspector1 View Post
You started off saying +0.060" on the block bore. What size is it now? If it's stock at 3.875", could you back down to boring it +0.030" instead of +0.060"?
Is the block deck height stock right now at ~9.025"? You said the heads have been cut. Do you know how much?

By the way, if Crower posted an operating range of idle to 6000 on any of their cam grinds, then shame on them. An engine may operate from idle to 6000, but it will not make useable power from idle to 6000 with any one camshaft. The camshaft operating range, where it makes power, is normally 3500 to 3800 rpm's, like from idle to 4500 or 1000 to 4800 or 1500 to 5300 or 2000 to 5800 or whatever. I just wanted to make that clear so that others reading this thread will not get the wrong idea and think there is something magical about Crower cams that permits them to make power over a 5200 rpm range (idle to 6000).
The block is already .060 over (9.375"), and the heads have been resurfaced, not sure how much though, I haven't measured them. I plan on having the block decked .010. I hope everybody reading this thread knows better than that.
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  #48 (permalink)  
Old 05-08-2013, 10:13 PM
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crower makes good cams. The reason I said 220 duration,was to give the little engine a chance to breathe at higher RPMs.The lower ICL║ was to keep cylinder pressures up while using a little bigger cam.The heads you have are not known for big flow numbers so the bigger cam may crutch this problem a little.
The smaller crower cam will work fine. Bolt it in and make some noise! good luck
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  #49 (permalink)  
Old 06-26-2013, 09:23 PM
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307-360 stoker

put in a 383 crank with custom 30 over pistons and ull have a torque monster 360 stroker--any combination of good parts ie heads intake rods crank and cam will get u there--its also very important to open up all the oil gallies and champfer the top of the cylinder block so it breaths better
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