INTERNAL ENGINE MODIFICATIONS Valvetrain |Heads | Strokers | Design | Assembly

fresh 4.3l won't start

Old Mar 22, 2009 | 10:38 PM
  #31  
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Originally Posted by 4.8T
we'll i never thought about making a driving vid lol. but yeah, she is all up and running. it does not like the maf at all. soon as you turn it on it has a real bad throttle lag. still needs some cold idle tuning. just too lazy to do it right now lol. been working stupid long hours. good ole navy.
You mean right when you hit the throttle lightly (sometimes for me) it slightly bogs?
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Old Mar 23, 2009 | 12:13 AM
  #32  
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yeah, thats what it does. but being camed its trys to die sometimes.
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Old Mar 23, 2009 | 12:48 AM
  #33  
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I need some additional tuning in that area, every now and then I can feel the bog under light throttle down low, like taking off from a light. I need to get a log of that though.
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Old Mar 23, 2009 | 01:11 AM
  #34  
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i just turned his off for now. i want to do a 3bar setup on his.
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Old Mar 23, 2009 | 01:26 AM
  #35  
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Do you have a thread with the specs on that motor? Is it a built motor or mostly just forged pistons? Head work?
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Old Mar 23, 2009 | 01:59 AM
  #36  
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eagle h-beam rods, forged pistons, arp on mains and heads, felpro mls gaskets, comp behive springs on the heads. comp cams 224/224, heads were port and polished with valve job by a local guy. marine intake with seimen 60's.

in my closet i have a mpt-70 and a set of syty manifolds along with a detroit locker for the rear.

he still needs to order the meth. the goal is 500rwhp. which is why i want to do the 3bar. i think he will need it for the 15-20psi this little 8.8:1 compression motor will be getting.
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