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Help Me with 42lb Injector Purchase - PLEASE

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Old 07-16-2005, 04:09 PM
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Default Help Me with 42lb Injector Purchase - PLEASE

*Going to AFR 205's, 224ish Cam, Maybe 100 Shot Later - 2002 C5

Okay, I think it sounds like going bigger than needed on injectors is alright, so I'm looking at exactly what injectors to get now:

1) Are there any real differences between various brands of injectors?

2) If so, which brand do you recommend and why? (the ones I know of are SVO green top, FMS, and Racetronix, any others?)

3) Where have you found the best prices?
Old 07-16-2005, 07:05 PM
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I found a used set of Ford green top 42#'s for $200. Look around, keep your eye on the ford sites too. I'm opting not to upgrade the pump at this time.

Sorry can't help much with the rest.
Old 07-16-2005, 07:24 PM
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Venom, off ebay, they will make any size high or low z
Old 07-17-2005, 12:40 AM
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Blue Oval Industries on Ebay has great prices, good people to ebay with.
They have all of the SVO injectors 30, 42 etc.
Old 07-17-2005, 11:38 AM
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SVO is a great quality injector. Go with the greentop 42lb actually 50 at ls1 fuel pressure....get a tune and you'll have plenty of injector for the future.
Old 07-20-2005, 10:09 AM
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after all my fights with injecotrs and the information i found out, go with svo
Old 07-20-2005, 10:39 AM
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I concur, WS6FireBirdTA00 helped me last night fine tuning the proportional closed loop fuel airflow table ( SVO Ford 42lb ) and now it's running fantastic.
Old 07-20-2005, 10:44 AM
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FMS 42lb'ers on ebay for 239 + 10 shipping.
Old 07-20-2005, 11:28 AM
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I liked my Racetronics 37lbers.
Old 07-20-2005, 11:28 AM
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Originally Posted by Viper
I concur, WS6FireBirdTA00 helped me last night fine tuning the proportional closed loop fuel airflow table ( SVO Ford 42lb ) and now it's running fantastic.
glad to hear
Old 07-20-2005, 08:25 PM
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Originally Posted by Brody
*Going to AFR 205's, 224ish Cam, Maybe 100 Shot Later - 2002 C5

Okay, I think it sounds like going bigger than needed on injectors is alright, so I'm looking at exactly what injectors to get now:

1) Are there any real differences between various brands of injectors?

2) If so, which brand do you recommend and why? (the ones I know of are SVO green top, FMS, and Racetronix, any others?)

3) Where have you found the best prices?
http://www.thunderracing.com/catalog...mid=88&sid=380
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Old 07-20-2005, 08:28 PM
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Originally Posted by BriancWS6
I liked my Racetronics 37lbers.
Who did your tuning?
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Old 07-20-2005, 09:05 PM
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How does the SVO injectors spray(pattern) compared to the Racetronics?
Old 07-20-2005, 09:09 PM
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im not sure about that hopefully racetronix can comment on it though. but the racetronix are a good injector, they just tend to hit the cut out limit in the mid to high 1.xx ms of pulse width where the svos can go much lower than that, about 0.9 ms or so. if you have a cam that idles at a higher map then you will have no issue with racetronix higher flow injectors, but if you have a small cam or are closer to stock svo would be a better bet IMO, but then again we dont keep em stock for long
Old 07-20-2005, 10:08 PM
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On the flow bench the Delphi disc injectors have no trouble down to 1.5ms. We would like to see a hi-z pintle injector that is faster than a disc injector and stable down below 1.0ms.

Most customers and none of our dealers have had your troubles. Many customers have used these injectors with stock cams running dry N2O and are able to target factory idle A/F with great stability. You have only tried the 38# injectors. Not 32's, 37's or 42's. One person's experience is not a basis for passing judgment on the entire product line. You are entitled to your opinion based on your personal experience but that is the extent of it.

Just to clarify we are talking about Delphi brand injectors which are used in many GM cars. They are not Racetronix brand injectors.

The Delphi 42 has a three prong fan spray pattern. The 42 is the most popular injector sold.
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Last edited by Racetronix; 07-21-2005 at 01:07 AM.
Old 07-21-2005, 05:19 AM
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like i have said in all my other posts, sorry i didnt mention it but i used the 38# injectors and these do not go with the stock cam good at all, but are perfect for the larger cam. this is a tech site and im giving my personal info out for others to see. you are right others may work but i have read a lot that the 38# are some troubles in low map areas low pulse width
Old 07-21-2005, 08:26 AM
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GFo with green top SVO injectors....those are Bosch brand injectors....easy to tune....unlike Racetronix
Old 07-21-2005, 01:53 PM
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Originally Posted by PSYKOZ28
FMS 42lb'ers on ebay for 239 + 10 shipping.
I have a set of those on the way to the house right now. Can't beat that price.
Old 07-21-2005, 09:25 PM
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Originally Posted by AdamSS
GFo with green top SVO injectors....those are Bosch brand injectors....easy to tune....unlike Racetronix
WHICH RACETRONIX INJECTOR? DO YOU MEAN DELPHI INJECTORS? IF SO WHICH DELPHI? THE ENTIRE LINE OR JUST YOURS?

Most people have found it easy to tune the Delphi injectors.
If you are going to bash an entire line based on a single calibration size and the experience of a small handfull of people you had best be able to back it up with numbers. Since we have sold tens of thousands with only a small handfull of people having trouble we would have to say that the numbers are on our side.
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Old 07-21-2005, 09:42 PM
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racetronix, what are the differences in the injectors by makes? and what would cause problems on the 38# that wouldnt show on the rest? im just wondering what the differences are, maybe techincal information would help us out, if you could post stuff like that it would help a lot better than just saing he was wrong, if you tell him to get his facts strait then give some info to prove your facts. an no im not trying to argure, i really would like to know the difference myself, from a technical stand point.



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