Another pulley question... swap, etc
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From: Raleigh, NC
Another pulley question... swap, etc </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
I have A(n) ATI question for you. Currently I have ATI procharger 7psi.
When it was first installed I saw 5psi with my exhaust then I ordered #42 injectors installed them and did some s/c programming with LS1 edit now I see 4.5 psi (and I don't get lean codes under boost)
The real question here is that with the programming #42 injectors and a new intank fuel pump that is rated for over 600 rwhp when I install the new pump, can I junk my FMU?
P.S. Can you please send me the method for moding your crank pulley?
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I have seen my boost get lower when I coincidentally did something else and it was as simple as the belt slackened over time.
Try tightening the belt some more first. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
With the RIGHT programming, larger injectors and a larger pump, yes, you should be able to scrap the FMU.
But, Golden West Performance figured all that out for me and I was in the ballpark from the git-go. A subsequent re-tune put me right on.
(I might mention that a misunderstanding about what pulley size I actually had contributed to the less than optimal initial tune.)
Heat the pulley with a torch enough to tap it off (this will be the hardest part).
To keep the shaft from rotating (if you don't have a vice to hold it), put your pulley belt on the pulley and double it back... hold the shaft secure while you tap the pulley off evenly around it's circumference.
Heat the new pulley in your oven for about 5 minutes. Position it on the compressor shaft (holding it with a vice-grip or something <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> ), with the dowel pin (I may be calling it the wrong thing) and it will almost slide on... very light taps will do it.
Hope that helps.
Let me know!
I have A(n) ATI question for you. Currently I have ATI procharger 7psi.
When it was first installed I saw 5psi with my exhaust then I ordered #42 injectors installed them and did some s/c programming with LS1 edit now I see 4.5 psi (and I don't get lean codes under boost)
The real question here is that with the programming #42 injectors and a new intank fuel pump that is rated for over 600 rwhp when I install the new pump, can I junk my FMU?
P.S. Can you please send me the method for moding your crank pulley?
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I have seen my boost get lower when I coincidentally did something else and it was as simple as the belt slackened over time.
Try tightening the belt some more first. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
With the RIGHT programming, larger injectors and a larger pump, yes, you should be able to scrap the FMU.
But, Golden West Performance figured all that out for me and I was in the ballpark from the git-go. A subsequent re-tune put me right on.
(I might mention that a misunderstanding about what pulley size I actually had contributed to the less than optimal initial tune.)
Heat the pulley with a torch enough to tap it off (this will be the hardest part).
To keep the shaft from rotating (if you don't have a vice to hold it), put your pulley belt on the pulley and double it back... hold the shaft secure while you tap the pulley off evenly around it's circumference.
Heat the new pulley in your oven for about 5 minutes. Position it on the compressor shaft (holding it with a vice-grip or something <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" /> ), with the dowel pin (I may be calling it the wrong thing) and it will almost slide on... very light taps will do it.
Hope that helps.
Let me know!
