Injector Size for X3/Stock Heads
08-22-2007, 11:13 AM
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Injector Size for X3/Stock Heads Hey, Im building a stock displacement ls1 with 241 heads. ls6 intake, vengeance x3 cam (226/228 .58X lift) with long tubes and offroad pipe. The calculator shows me needing only a 29lb injector for 450crank power. not even sure if my combo will make that much. Would I be ok with a set of 28lb CTS-V injectors? Found a good deal and the 36lb SVO ones seem like pure overkill for my application. What do you guys think?
08-22-2007, 03:59 PM
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not trying to correct you just wondering 
Anyone else have exp with this? I shouldnt break 400rwhp and im thinkin the 28.8 CTS-V style should get it done. Any other experiences or opinions?
Anyone else have exp with this? I shouldnt break 400rwhp and im thinkin the 28.8 CTS-V style should get it done. Any other experiences or opinions? 
08-22-2007, 04:29 PM
#6
Originally Posted by 2QUIK4U
The 28# injectors will be fine. My stock ones were good to 450rwhp. No need to replace the fuel pump either.
I usually see the 28lbers poop out about 405-420rwhp on an M6, 395-410 on a locked A4 .... but it's a crap shoot there too because the pump usually runs out of steam around the same time as the injectors.
08-22-2007, 09:04 PM
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well, im not sure what to do at this point because half of the people say yes half say no, this car is never going over 6200 RPM and is not a race car. conufsed
conufsed Last edited by MemphisZ28; 08-22-2007 at 09:09 PM.
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08-28-2007, 08:50 AM
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yeh glad you got some bigger ones, 28.8#ers would have been maxing out for you...theres no since in upgrading the fuel pump on the stock injectors... just go ahead and do both or just do new injectors...those 28.8s don't last long
08-28-2007, 04:01 PM
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I agree. my buds vette with same cam and stock heads was maxxed with 28s. Gotta figure out how to tune this beast though building an ls1 is like a snowball rolling downhill.
building an ls1 is like a snowball rolling downhill. 