ZPI Stage 2 Head INFO?
08-10-2006, 04:34 PM
#61
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I have never required engine management on any mildly ported head I have used or ported for someone. However, if you make it more of a race port, you might need to adjust the fuel settings to keep up, but I am not quite sure why on the tC it requires the piggy back for the stage 1. I too would like an explanation.
08-10-2006, 04:59 PM
#62
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well let me correct my last post this is what their website says:
"This system will make the car run overly rich and more power can be found when used in conjunction with a piggyback fuel controller. "
So I guess you don't absolutely need it on the stage 1, just makes it much more effective...
wonder if the same applies to stage 2??
"This system will make the car run overly rich and more power can be found when used in conjunction with a piggyback fuel controller. "
So I guess you don't absolutely need it on the stage 1, just makes it much more effective...
wonder if the same applies to stage 2??
08-13-2006, 10:19 PM
#64
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yes i would also like to know more info on the stage I and stage 2 heads. cause i am really interested in buying one of them. ZPI?
and if anyone has anyone of the heads on....
can i get some feed back?
cause i want to make my tc the fastest it can be without f/i.
oh and a quick question... sorry if this has been answered already but if you do change the heads.... how does it affect the tc's fuel efficiency? and would i start needing to fill up with 91 or wat? yea sorry for the question but yea i'm a noob. but i am a noob thats trying to learn. ;)
and if anyone has anyone of the heads on....
can i get some feed back?
cause i want to make my tc the fastest it can be without f/i.
oh and a quick question... sorry if this has been answered already but if you do change the heads.... how does it affect the tc's fuel efficiency? and would i start needing to fill up with 91 or wat? yea sorry for the question but yea i'm a noob. but i am a noob thats trying to learn. ;)
08-13-2006, 10:47 PM
#65
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well, the stage 1 has added 21 whp without tuning so im thinking maybe one or two more oculd be added to gain efficiency. As far as the stage 2, I don't recall but I don't think it has any further porting and polishing it has more internals allowing you to run higher RPMs HOWEVER since yo u do not want to go the F/I route higher RPMS is almost pointless as our car falls back on its face after about 5500 so running higher RPMS won't do much good as we lose torque so I think you're better off running a stage 1 head without F/I. And you should only run 89+ when you are either
A) High compression
B) Turboed/SCed
nice to see you're trying to learn
A) High compression
B) Turboed/SCed
nice to see you're trying to learn
08-14-2006, 09:13 AM
#67
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Actually the stock camshaft profile will be the one keeping the power band from moving up to higher RPM's, maybe if you could control VVT-i then maybe get power at a slightly higher RPM but really you need different cams.
08-14-2006, 01:32 PM
#68
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different cams are going to be difficult to use, and because the way our vvt-i works, there really isn't a controller that "totally" controls it, a good portion of its control is hydraulic, not much we can control about that lol...
08-15-2006, 04:01 AM
#71
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well, the more i think about it, the more that i think i'm going to get one of these bad boys. yes, a camshaft would be a nice addition, but hey, 20whp for $500 bucks isn't too shabby. add in an emanage, and a 75 shot and i'm good to go. next summer's project, woot!
08-15-2006, 04:12 AM
#72
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Originally Posted by tc2nut4
well, the stage 1 has added 21 whp without tuning so im thinking maybe one or two more oculd be added to gain efficiency. As far as the stage 2, I don't recall but I don't think it has any further porting and polishing it has more internals allowing you to run higher RPMs HOWEVER since yo u do not want to go the F/I route higher RPMS is almost pointless as our car falls back on its face after about 5500 so running higher RPMS won't do much good as we lose torque so I think you're better off running a stage 1 head without F/I. And you should only run 89+ when you are either
A) High compression
B) Turboed/SCed
nice to see you're trying to learn
A) High compression
B) Turboed/SCed
nice to see you're trying to learn
08-15-2006, 04:20 AM
#73
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Scion Evolution
If the oil pump can take the stress from pulley swaps, I think take can take the increase of RPMs but without the pulley. Just my 2 cents.
NOTE: Just my opinion, not making a statement!!
NOTE: Just my opinion, not making a statement!!
08-15-2006, 04:43 AM
#75
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an electric water pump wouldn't be a bad idea either. i mean, freeing up a little drain on the engine and having peace of mind that high revs aren't going to hurt the stocker never hurt anything did it? anyone know if anything like that can be put into our cars?
10-29-2006, 02:54 AM
#79
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Scion Evolution
Doing your own headwork, will have different results, so what maybe worked for someone, maybe wn't work for you. But still I haven't seen anyone with resluts from head port or things like that.