Looking for everyones .02 cents....
#1
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Join Date: Sep 2017
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Looking for everyones .02 cents....
Current power: 7.4l mpi motors (oval port heads, 310hp and MEFI 3's)
NOW?!?!
I am planning on building motors and robbing as many accessories and brackets from the old motors as possible. Upgrading what I have to as I go. I also have HP525 EFI intakes laying around, which I would love to use. Looking to burn 89 to 91 octane.
Option #1: Take current blocks to be tested and make them into 489's or 496's, good set of heads, cam and use the 525 intakes.
Option #2: Get 502 long blocks, change the cam and use the 525 intakes.
Option #3: Find myself 502 blocks, turn them into 509's and use the intakes. And have the capability of turning into 540's later.
Option #4: This is what my plan was until now(after reading about so many builds), build 540's with some (525 intake massaging).
End goal...
89-91 octane
use the HP525 intakes(which I understand are the limiting factor)
looking for 550-675 HP and rpm range of 5400-6000
thanks guys
NOW?!?!
I am planning on building motors and robbing as many accessories and brackets from the old motors as possible. Upgrading what I have to as I go. I also have HP525 EFI intakes laying around, which I would love to use. Looking to burn 89 to 91 octane.
Option #1: Take current blocks to be tested and make them into 489's or 496's, good set of heads, cam and use the 525 intakes.
Option #2: Get 502 long blocks, change the cam and use the 525 intakes.
Option #3: Find myself 502 blocks, turn them into 509's and use the intakes. And have the capability of turning into 540's later.
Option #4: This is what my plan was until now(after reading about so many builds), build 540's with some (525 intake massaging).
End goal...
89-91 octane
use the HP525 intakes(which I understand are the limiting factor)
looking for 550-675 HP and rpm range of 5400-6000
thanks guys
#6
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iTrader: (3)
the only i have with using the 502 pistons&rods is when you decide you want more power so you crank up the boost the piston that is not designed for boost will eventuially fail,also for what you can buy a decent set of rods today with arp2000 bolts why chance a rod failure with the stock gm rods.
#7
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iTrader: (7)
Good 4.250 rotating assemblies are fairly reasonable and the route I went some years back. Used dart 310's with dart single plane intakes and holley 850's and made 620 hp @6k. Member here on oso purchased and dynoed. Personally I'd sell the efi intakes. Also could consider ADK61 promaxx heads. He will set them up and ship to you ready to bolt on. Just an option to think about. You have endless options but this would likely be the most cost effective and achieve your goals. Btw the cam used was a custom comp grind.
Last edited by getrdunn; 09-13-2017 at 03:22 PM.
#8
Good 4.250 rotating assemblies are fairly reasonable and the route I went some years back. Used dart 310's with dart single plane intakes and holley 850's and made 620 hp @6k. Member here on oso purchased and dynoed. Personally I'd sell the efi intakes. Also could consider ADK61 promaxx heads. He will set them up and ship to you ready to bolt on. Just an option to think about. You have endless options but this would likely be the most cost effective and achieve your goals. Btw the cam used was a custom comp grind.