Yeah it's gonna be interesting, have an HPDE the following weekend so a little more top end pull will keep those pesky vetts close enough in the straits to bug em in the turns. I can keep the revs between 5000-7400 which should be high enough to make the HP without the torque
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Originally Posted by Bronson M
(Post 1535209)
Yeah it's gonna be interesting, have an HPDE the following weekend so a little more top end pull will keep those pesky vetts close enough in the straits to bug em in the turns. I can keep the revs between 5000-7400 which should be high enough to make the HP without the torque
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Originally Posted by andyfloyd
(Post 1535210)
Im pretty impressed your doing all this on the stock bottom end. Are you going to try to taper boost to redline to maintain tq? Like say youve got 10psi @ 4k but then past 5000rpm feed in more boost to end up at like 16-17 by redline?
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Originally Posted by Bronson M
(Post 1535211)
That's exactly what I plan to do, I start at 10psi at 4k now and ramp to 14psi by 5.5k.
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92 octane? Stock fpr?
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For me, yes 93 octane, 650cc injectors, walbro 190 on stoc NB FPR. I'm seeing right at 80% duty cycle with 62psi and 11.4ish AFR's
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Originally Posted by B Mike
(Post 1535301)
92 octane? Stock fpr?
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Originally Posted by Bronson M
(Post 1535302)
For me, yes 93 octane, 650cc injectors, walbro 190 on stoc NB FPR. I'm seeing right at 80% duty cycle with 62psi and 11.4ish AFR's
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Yeah the wheel has seen some things, the small chip isn't too bad but it's there. It's not a 28 wheel as far as I know, just a journal bearing 2560. Duty cycle is duty cycle, so should be the same. I'm running pretty rich, that might explain the difference......or I'm just making way more than i think.
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Originally Posted by andyfloyd
(Post 1535305)
Your duty cycle suggests you are in the 300whp range. I'm actually surprised my duty isn't higher honestly. Maybe the Hydra and ms3 read duty cycle differently? I'm really curious what kinda power your making. I read your build thread, in one picture I saw your turbine wheel. It looked clipped and I swear it has one less blade than mine. Is it a straight 2560? Or do you have a gt28 turbine wheel?
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Originally Posted by Bronson M
(Post 1535306)
Yeah the wheel has seen some things, the small chip isn't too bad but it's there. It's not a 28 wheel as far as I know, just a journal bearing 2560. Duty cycle is duty cycle, so should be the same. I'm running pretty rich, that might explain the difference......or I'm just making way more than i think.
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Originally Posted by B Mike
(Post 1535307)
The fuel pump might be helping.
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I data log my fuel pressure and actually had a 255, it does over power the NB regulator at low PW, would rock up to 70psi and caused all kinds of funky transient fueling issues. I would see about 58psi at redline with the 255 still, with the 190 I see 56-57 psi. I chalk this up to pressure drop through the lines since both pumps are over kill for this power level.
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Originally Posted by Bronson M
(Post 1535310)
I data log my fuel pressure and actually had a 255, it does over power the NB regulator at low PW, would rock up to 70psi and caused all kinds of funky transient fueling issues. I would see about 58psi at redline with the 255 still, with the 190 I see 56-57 psi. I chalk this up to pressure drop through the lines since both pumps are over kill for this power level.
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Where I saw the problem was on AE, if I was at part throttle the fuel pressure would be at 62 psi and on a throttle stab the motor would want a certain amount of AE. If I was off the throttle in overrun the fuel pressure would be in the low 70's and a throttle stab would nearly drown the motor.
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Originally Posted by Bronson M
(Post 1535314)
Where I saw the problem was on AE, if I was at part throttle the fuel pressure would be at 62 psi and on a throttle stab the motor would want a certain amount of AE. If I was off the throttle in overrun the fuel pressure would be in the low 70's and a throttle stab would nearly drown the motor.
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For the others that are following along, my dyno day was a bust. I have some odd issue going on where the motor is surging and not making power. Replaced coils and plugs with no improvement, changing cam and crank sensors next and then fixing with an LS swap after that.........aren't race cars fun.
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Originally Posted by Bronson M
(Post 1535685)
For the others that are following along, my dyno day was a bust. I have some odd issue going on where the motor is surging and not making power. Replaced coils and plugs with no improvement, changing cam and crank sensors next and then fixing with an LS swap after that.........aren't race cars fun.
It really sucks that it runs perfect for so long then hates life right when you want to Dyno it lol. I understand the LS swap thing, however I actually like the BP... This makes me tarded' obviously. |
I like this engine build. I just need rods-head-exhaust and should be close to your numbers. 300 seems to be the max before things get pricey.
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Originally Posted by B Mike
(Post 1535933)
I like this engine build. I just need rods-head-exhaust and should be close to your numbers. 300 seems to be the max before things get pricey.
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