I have the GM supercharger for the 2.4L, i have gotten a smaller pulley , a 2.6" to be exact. The last i heard the stock GM S/Cer injectors hit there max peak at high RPM's with the smaller pulley once tuned right, so my question is, if i were to order between the 320cc injectors and the 550cc which ones should i get? Also, the injectors i were looking at (carcustoms.com) say these injectors are low impedence, but i have the high impedence as stock N/A injectors, does this matter?
NEW SIG COMING SOON FOR 07'!!!
im currently running a 2.4" pulley on my motor with the 310 injectors. MOtor only makes about 7.5 PSI because of top end. Still holding about 12.5-13.0 on the wideband. Still havent done any form of tuning other than adding about 5 PSI of fuel pressure. Was still making power at rev limit, so Id have to say the injectors probably wont top out with a 2.6" pulley. Hope this helps.
where in the HELL did you get a 2.4" pulley. and also, running the 310 injectors with no other fuel mods is a realllllllllllllllly bad idea. if you're only making 7.5 psi, you're really off, the 2.6 has made 8 and the 2.5 has made 9-10. you've definitely got an error in your setup. and yes, its been proven that running the 2.6 pulley with the 310's is pushing it.
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- Sold my beloved J in April 2010 -
and brian, popular sizes have been 370 and 440.
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- Sold my beloved J in April 2010 -
and not to mention that the 2.5 is already overspinning the charger and having all sorts of things start to fail.
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- Sold my beloved J in April 2010 -
ill sell ya some lucas 38lb/hr injectors that will work for ya, i run them with 14 psi on my eco
I have some Stock 360cc injectors from a Superchagred Cobalt SS for sale
As I stated the top end flows to good. Ported head, HO cams, 4-1 header and 2.5" dump.The charger is only capeable of producing 7.5 PSI. Based on the math I did (may not be correct as I did it really quickly at work) the charger is spinning at about 17500 at rev limit. The pulley is for a GTP and its from pulley boys. With my setup the 2.6" pulley made 4.5 PSI, the 2.5" made 6 PSI and the 2.4" makes 7.5PSI. If I run the alcohol injection (cant turn it down enough because something went wrong with it) the AF on the wideband is about 10.5:1 and without the alcohol its 12.5-13:1. No missfire and no lean issues. No problems all the way to its top speed. The only failure I have ever had with the charger has been a seal failure because I over filled it with oil due to some faulty information. When I get the rev limit raised to 7500 I will install some 36lb injectors, as I do not feel that the 310s would be sufficient at the higher RPM. If I belived everything I read on this forum then I would belive that my the M45 couldnt support more than 200 HP at the wheels. I know what my motor does and that there is nothing wrong with the S/C. I also know that the PCM is quite happy with the 310 injectors and that the motor is not running leaner than I would like to see.
17,500 rpms. do you remember what the limit is recommended by eaton?
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- Sold my beloved J in April 2010 -
Question if you have the sc kit on a 2000 and change the injectors from the 310cc ones in the kit how will that affect the GM reflash? In other words if I installed Ford red or brown tops with the GM reflash and no fmu or afpr would it cause the car to run rich?
2000 Z24 5spd header & catback for now.
