pdq67 wrote:Look, I am NOT building a competition engine, but rather a CHEAP daily driver that I can rpm the sh*t out of when I want to feel like a kid again is all.
Nothing out of the ordinary EXCEPT 6.25" long small journal rods IF I can buy a reasonably priced set and flat-pistons to match.
If I have to, I will grind hell outta my old 305, -601 SMALL CHAMBERED HEADS, install big valves and use them.
Now are there any other rod length/stroke/dished piston combinations out there that will allow me to do this by just milling the pistons down a skosh??
How about a milled 327 blower piston and a shorter rod??
I have never built an engine like this so I have to ask help from those that have built one-off, odd-ball combinations is all.
pdq67
I like the way you think,lol.
Everyone appreciates your honesty , until you're honest with them , then you're an @$$hole.
What is the point of long rods and custom pistons in something that is supposed to be a cheap motor? Other than some theoretical Rod/stroke BS that you will never notice in a budget deal with junk 305 heads, how do you think this will help you? I can't figure out why you wouldn't just throw it together with 5.7" rods and cheap Pistons? If you are dying to spend money, there are better places to spend it (heads / valve train). What am I missing?
KnightEngines wrote:Eagle do a 6.25" Honda journal rod, if you got a steel small journal crank you could grind it down.
Or just use a 6" rod.
Paul, I did some looking for a 6.25" small journal rod budget rod but came up zero. If the honda rod bearing is something you would consider. I remember someone builds a 6.25" rod with a honda small end. Even a machined down chevy forging would have plenty strength for your application. If you really want to do up the 601 heads get them magnafluxed! I would be glad to do a step by step thread for you. I figure near 260 cfm and 180 cfm and a 69cc chamber before milling with 2.02 1.6 valve combo. Thanks Charlie
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Like a dog obsessed with chasing its tail. The parts you are looking for for a 302 SBC do not exist in massed produced affordable form because it won't make it go faster or rev higher.
I could throw together a LOW COST bored out 10.5:1 305 SBC with 5.7 rods, reworked vortec heads and a solid lifter cam
and you'd think and swear it was the best lil 302 you ever drove. It will rev to the moon and go fast too.
F-BIRD'88 wrote:Like a dog obsessed with chasing its tail. The parts you are looking for for a 302 SBC do not exist in massed produced affordable form because it won't make it go faster or rev higher.
I could throw together a LOW COST bored out 10.5:1 305 SBC with 5.7 rods, reworked vortec heads and a solid lifter cam
and you'd think and swear it was the best lil 302 you ever drove. It will rev to the moon and go fast too.
You are barking up the wrong tree.
What he said.
Better yet, use a 4" bore and make it a 350. It will rev the same and go even faster.
I have built 267's to 406's and guess what? They all spun 7000 rpm no problem. Rpm is usually valve train crash limited. I agree but Paul want a specific cubic inch I understand.
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Paul, this might be easier if you give us a list of parts you know are usable and if you have more specs that you would like to add besides rev to the moon. The car specs too. Thanks, Charlie
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pdq67 wrote:Look, I am NOT building a competition engine, but rather a CHEAP daily driver that I can rpm the sh*t out of when I want to feel like a kid again is all.
Nothing out of the ordinary EXCEPT 6.25" long small journal rods IF I can buy a reasonably priced set and flat-pistons to match.
If I have to, I will grind hell outta my old 305, -601 SMALL CHAMBERED HEADS, install big valves and use them.
Now are there any other rod length/stroke/dished piston combinations out there that will allow me to do this by just milling the pistons down a skosh??
How about a milled 327 blower piston and a shorter rod??
I have never built an engine like this so I have to ask help from those that have built one-off, odd-ball combinations is all.
pdq67
I like the way you think,lol.
check my rithmatic, but around 1.25" compression height- .015" off of most 6" rod 350 pistons could actually do this.... or it looks like they have some already at 1.25" compression height. you would need to BVVC about that top land.......
and maybe less machining if you were playing between an undecked block and compression height....
very short on SJ rod choices- lots of LJ choices....
Jason
Interesting that a 302 with AFR eliminator 210cc heads and a 256/260 @ 0.050, .640/.620, 107 LSA solid roller cam (and 6.0 rods) made peak power at 7400 rpm. A stock 302 peaked at 6700 rpm. (linked articles below)
How are you gonna make power at 7000+ rpm with a small flat tappet and 601 heads? Best of luck to you, but call me a skeptic.
novadude wrote:Interesting that a 302 with AFR eliminator 210cc heads and a 256/260 @ 0.050, .640/.620, 107 LSA solid roller cam (and 6.0 rods) made peak power at 7400 rpm. A stock 302 peaked at 6700 rpm. (linked articles below)
How are you gonna make power at 7000+ rpm with a small flat tappet and 601 heads? Best of luck to you, but call me a skeptic.
According to some of the old documentation of what GM did with the race version of the 302DZ motor with OEM ported heads, the cross ram and the 2 GM off road Z/28 solid lifter cams and various different header designs the 11.4:1 302 race prepared motor made peak HP at 7200 and 7600rpm depending on configuration. Power was in the 465 to 480 range depending. Thats with 5.7" rods,,,,so
Remember this is with ported 2.02x1.60 OEM heads and a .500" lift +/- solid lifter 1967 1969 era camshaft
of the day..
No CNC ported heads or .640" race roller cam or 12.5:1cr The cross ram never was that good.
novadude wrote:Interesting that a 302 with AFR eliminator 210cc heads and a 256/260 @ 0.050, .640/.620, 107 LSA solid roller cam (and 6.0 rods) made peak power at 7400 rpm. A stock 302 peaked at 6700 rpm. (linked articles below)
How are you gonna make power at 7000+ rpm with a small flat tappet and 601 heads? Best of luck to you, but call me a skeptic.
According to some of the old documentation of what GM did with the race version of the 302DZ motor with OEM ported heads, the cross ram and the 2 GM off road Z/28 solid lifter cams and various different header designs the 11.4:1 302 race prepared motor made peak HP at 7200 and 7600rpm depending on configuration. Power was in the 465 to 480 range depending. Thats with 5.7" rods,,,,so
Remember this is with ported 2.02x1.60 OEM heads and a .500" lift +/- solid lifter 1967 1969 era camshaft
of the day..
No CNC ported heads or .640" race roller cam or 12.5:1cr The cross ram never was that good.
Had plenty rpm .
they also had many rod failures! They moved up to lg pink rods and reduced failures.
Servedio Cylinder Head Development
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