I'm kind of inexperienced when it comes to the 420a. I've done some research on these motors and have read a lot about how the oem stock rods are mainly the weakest part of the 420a's. Which is the reason why high boost levels can not be acheived on the stock internals. My question is if the rods are replaced with say eagle forged rods with the stock 9.6:1 compression pistons about how much boost can be attained in this type of set up safely? If someone could give me some sort of insite into this it would be appreciated, thank you.
Outside of Corona: "That sucks, peace out..." (jamie walks away)... "Sweeet, what we doin?" -Zac Tim's garage (prior to motor install): "Im gonna smoke real quick, that way if you fuck up I am already nicotined up" -Tim
#107237, "RE: Safe Boost Levels" In response to Reply # 2
Thanks guys for the clarification to this question and the insite. Another question I have is what kind of boost levels can be put on this motor with forged internals and complete head work done?
#107239, "RE: Safe Boost Levels" In response to Reply # 4
Originally posted by nicho919 Enough.
IT'S NEVER ENOUGH!!!!!
Erik P. Official 2GNT thread Hijacker Some say that he's driven over more Covenant than he's shot, and that his grenades aren't where you'd expect them to be... All we know is, He's not The Stig... But he is The Stig's Spartan cousin!
#107240, "RE: Safe Boost Levels" In response to Reply # 3 Oct-02-09 02:00 PM by bullettdsm
Originally posted by 420aDSM_Tuner I have is what kind of boost levels can be put on this motor with forged internals and complete head work done?
{pet peeve rant coming} Boost level is not a measure of power. 20 lbs on a 14b will not have the same power as 20lbs on a 42r {rant over. That was quick}.
With that being said, I'm running 29lbs on a BW366 with 10.5 comp. The set-up will easily go higher. But it is limited by spark blow out right now. Need to upgrade.
Captain Caveman
96 RS Turbo 11.414 @ 119.62 MSNS, Crower 2 NA cams, BW366, 10.5 comp, UDP, 60mm TB, W/A intercooler, 3.55 tranny 567.9whp 430tq 97 RS NA 13.188 @ 103.87 MSnS powered 12.5 comp, Crower 3's and 219.4whp with 175tq 98 RS DD 12.5 comp on stock ECU, LTH, Crower 2's, Koni, GC, Hypercoil, DG hats 99 OZ 5sp Stocker 15.856 @ 85.97 99 GS stocker auto 17.7@77mph!
#107241, "RE: Safe Boost Levels" In response to Reply # 6
I ran 12 psi on mine on a e'gay t3-t4 turbo all stock and with nothing to tune it or pull timing....ran nice!
All was good when I pulled the internals no damage on the ring lands or rods... I still have them ...lol But going with forged internals so I can up the boost safely...
Status- Need to do break-in...
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#107473, "RE: Safe Boost Levels" In response to Reply # 0
this is kind of a dead topic but you may want to know this. the eagle rods dont fit right up to stock pistons. the wrist pins on the stock pistons are different from those on the eagle rods.
