what injectors!!!

[transmaro93]

hey guys.... im going to finish up buying the fuel stuff i need for my build... just cant figure out what injector to go with... probably going to go with the SVO's... but there is a couple of styles i think to choose from.... can anybody guide me in the right direction... car is N/A 383 and going to be running 42# injectors on that ( i know its a little high but id rather tune them down then be at the limits of a 36#) i think there is like svo green top and blue top... anybody know the difference or what is better for my build... thanks!

[NJ Torque]

The 42# injectors are fine on my cam only LS1...

[transmaro93]

yea i just dont know what brand to go with... probably svo but what line... green top? i donno...

[S.J.SLEEPER]

42's way to go so you don't have to have a high duty cycle.
i'm a little particular in when it comes to putting ford parts in my cars.... (a little stuck up, owned 2 fords both pos's)
i have had real good luck with brands of injectors : venom , fast , racetronics
svo injectora i think are single hole, multi hole (3 hole spray nozzle) better atomization,performance,mpg etc...

[transmaro93]

yea i know the racetronix ones are good... but they are really expensive also...

[NJ Torque]

I have Bosch units in my car...

If you looking for cheap(wouldnt do that with parts like this...) look for Lightning injectors.

[BarneyMobile]

I have the Racetronix (delphi/lucas) 42's in my car.They work well! I also had the Racetronix 37's in my old 95 Z28.

[transmaro93]

not looking for the cheapest...i just know that the racetronix are like $500+ for the set and svo's are much lower but still a good product from what iv seen around...

[S.J.SLEEPER]

ther's a guy on craigslist in philly that has a set of racetronix injectors. don't remeber if they were 36 or 42 lb. think they were 42's here is his #1-215-651-5481 name is joe

[transmaro93]

id rather buy new... thanks though

[sweetbmxrider]

you don't want too large of an injector though. the spray pattern will be incorrect for the rpm.

[transmaro93]

yea i think ill be strait with 42's... i think 36's will be overworking themselves... im going to PM that 95ta guy see what hes using since hes got a car somewhat like what im doing...

[S.J.SLEEPER]

they only have a 1,000 miles on them, so he says.

[camaroracer1992]

i have a set of 65 FAST bosch style injectors for sale in about a month i need to upgrade to larger injectors let me know if youre interested

[LTb1ow]

42# SVOs, just cause they come in pretty colors. :)

[transmaro93]

whats the different colors mean though matt??

[LTb1ow]

Its like a color coding. Mine are red, 42s are green I think.

[transmaro93]

OOOHHH.. its only color coded for the size... i thought it was coded for the flow rate or impedence or somthing... i think im going to go with 42# svo's.... thanks for the help guys as always very appreciated...

[Pampered-Z]

You pay a bit more for the racetronic's stuff but your getting injectors matched to 1% and they have great customer service. I've run into some minor issues with their fuel pump kits and they always addressed the issue and corrected it right away.

Here is the part number for the 42s.

http://www.racetronix.com/621031.html

[transmaro93]

right on man.... any idea one what they cost??

[Tru2Chevy]

right on man.... any idea one what they cost??

It's all right on the site...click the "Buy Now" link....

The site shows $35.00 each, so $280 for 8 (but factory tolerances in fuel flow apply).

A 1% matched 8 pack is $360

- Justin

[transmaro93]

^^^ thanks! i didnt see tthe buy it now button...

[NJ Torque]

I wouldnt suggest "009" injectors... they are very difficult to tune for...

[RamAir95TA]

My vote is for the Lucas/Delphi 42#ers.

[JerzLT1]

i have Delphi 37# on mine, how much hp are you expecting to push?

[transmaro93]

hopen for 550 crank (give or take)..... going to try and get 450+ to the wheels.... im an m6 so it might be doable...

[S.J.SLEEPER]

keep in mind that if going aftermarket or ford injector, look at what the injector rating is @ **psi. lot of injectors are rated @ 43 psi where the ls1's run 53 psi . so if looking at a 36# injector @ 43psi it is mor like a 39-40# injector @ 53psi

if you go to F.A.S.T. website there is a chart to use for h.p. vrs. injector. that should help you decide your injector size.

[transmaro93]

^^^ thanks ill check that out... not quite following the psi changes though... for some reason the fast 42# are like $300 more than all their other sizes on ws6store..i cant figure that out...

[LTb1ow]

What don't you get?

One will flow a certain amount at pressure X, but if your car rails run at pressure Y, it will be either more/less than that rating.

[transmaro93]

anybody know what pressure stock ltx fuel rails run at with a walboro 255

[LTb1ow]

43 ish?

[JerzLT1]

yeah 42-45, youll be fine with Delphi 37# if itll save you money, i should be putting down around 500 at the crank or a little more and my car runs great

[LTb1ow]

yeah 42-45, youll be fine with Delphi 37# if itll save you money, i should be putting down around 500 at the crank or a little more and my car runs great

Oh yea? How do you figure?

[JerzLT1]

point proven on AIM ;)

[transmaro93]

your getting crazy numbers for a stock bottom end N/A.... crazzzyyy.... id like to hear your point... just so maybe id learn somthing that i dont know to run the times you do with a car set up like yours...

[LTb1ow]

He thinks his car is fast or something.

[transmaro93]

thats pretty fast for stock bottom end and N/A 500+hp crank tho..... ???

[LTb1ow]

Yea, he thinks its gonna hit tens or some craziness like that.


:)

[transmaro93]

is that car gutted?

[S.J.SLEEPER]

he must have put an LS1 in it !!!!:mrgreen:

[Pampered-Z]

If your looking to go 500+HP then I would go with the 42 injectors if your N/A, with boost or NOS then you might want bigger because you'll need extra fuel. You really want to go no higher then 80% DCs or your holding the injectors open too long and you run the chance or shortening the life of the injectors or having a cylinder(s) go lean.

Note that you are also going to need a fuel pump that can feed those injectors at that HP target. A stock pump is most likely not going to be able to feed 500 HP.

You don't need to be too concerned with fuel pressure itself, more with it staying consistent. That is, it matters less if you 40 or 60 PSI of pressure throughut the RPM range, but that you're pump can feed bigger injectors throughout the RPM range.

Your PF is not going to change based on the pump, if you want to change the pressure then you need an adjustable FP regulator. But the need to change it is somewhat of a mute point. Once your tuned, if you change the pressure the ECM will adjust the injector pulse to compensate, you only need to change the pressure if your using it as a tuning aid. But remember the stock ECM is a bit limited, if you go real high with fuel pressure you could have more trouble getting a quality idle, higher RPMs is less of an issue then better the ECM to control a very short injector pulse for idle and tip in.

The LT1s I've built that are near 400RWHP are geting close to maxing out the stock fuel pump. One at 380RW is close to the limits of the stock injectors, another is just over 400 HP running 42# and the next upgrade will have a new FP on the parts list.

My 383 engine ( blower = extra fuel needs ) made just over 500 RW with 9 lbs of boost and the 42's were getting pushed just to the 80% duty cycle. (racetronic pump and wiring harness) So when the time comes to raise the boost level I'll need larger injectors and probably a second fuel pump as well.

[sweetbmxrider]

he has the typical walbro/racetronix pump setup

[transmaro93]

^^^ what he said... also im N/A... and im going to run stock FPR... iv been told i should be find with it as long as the tune is good... thanks for the info though... very helpfull... that goes for everybody

[transmaro93]

ended up going with "pampered-z's" recommendation.... and ordered up a 8pk matched set of racetronix injectors last night... hope they will work becuase they dont give application specific parts they just offer what they do... but i used the link from papered... went with 42#ers.... so hopefully everything will work out good there... orderd those and the hotwire kit strait from racetronix... had no idea they were stationed in canada (yea i know... uhhgg canada)... but they shipped them already today... so thats that for now..

[LTb1ow]

Eh?

[transmaro93]

ehh? .... hey anybody ever order an opti from "thepartsladi" on ebay.... she is sopposed to sell oem stuff... but its not a delco part... rather a delphi part only becuase i dont think delco makes this stuff anymore... just wondering if anybody has used them... i wasnt going to replace my opti becuase i dithink there was nothing wrong with it... but then took matts advice and decided to do it....

[LTb1ow]

Thats the one thats on mine. Although I would go MSD.

[transmaro93]

iv read alot of threads on the subject and alot of people say that the oem is the best unless you want to get into the dynaspark that is like a million dollars... dont forget im only using it for the trigger... not the cap and rotor assem...

[LTb1ow]

Ohhh ok, nice. OEM then.

[transmaro93]

what does the msd offer over the factory part? just for reference

[LTb1ow]

Better quality?

A warrenty?

MSD-ness?

[sweetbmxrider]

msd wise, people use the cap and rotor. the red looks really cool if you do lt4 intake and crap too :)

just stick with oem and enjoy!

[sweetbmxrider]

ehh? .... hey anybody ever order an opti from "thepartsladi" on ebay.... she is sopposed to sell oem stuff... but its not a delco part... rather a delphi part only becuase i dont think delco makes this stuff anymore... just wondering if anybody has used them... i wasnt going to replace my opti becuase i dithink there was nothing wrong with it... but then took matts advice and decided to do it....

i gets teh ac delco :mrgreen:

[Pampered-Z]

Not sure how the recent MSD units are. When MSD came out with the Opti a few years back they had allot of issues. Most common was the tolerance between the cap and rotor rubbing. This filled the opti with pretty red dust then eventually killed the opti side. Other issues such as rotors breaking and such got them a real bad rep fairly quickly. You would think with the quality of other MSD products their Opti's would be a good peice.

I've used OEM and the Accel units and have had no issues with either but keeping the RPMs no higher then 6,600.

If yiou do a search there is a threa about opti's and some of the company's that sell them.