TORCHD 02 TA

iTrader: (39)

My duty cycle for my injectors with my 228/232 .588/.595 cam is 98% So i was thinking that i was going to upgrade to 42#'s. What is a good one to go with? red top or green top or Delphi. Where can i get the best deal on them too?

Thanks

TORCHD 02 TA

iTrader: (39)

No one can help me?

JZHeyde

iTrader: (30)

42's might be big...Ive heard great things about racetronix, dont know if they make 42s though.

Just my .02

you could always ask at work!

-JZ

TORCHD 02 TA

iTrader: (39)

ok then i will ask you when i see you tomorrow

TORCHD 02 TA

iTrader: (39)

bump for more people.

koolrayz

iTrader: (26)

red tops are all you should need with stock cubes. In fact the first thing that comes to my mind is you have a fuel pump issue. Upgade your pump and then look into a bigger injector. This is a cam only 346?

TORCHD 02 TA

iTrader: (39)

I have no fuel pump issue. My stock on is fine. My fuel injectors is my bottle neck right now. Yes cam only 346

vaticano

iTrader: (8)

i use the ones from racetronix. i believe they are the green tops. you will need to change the injector voltage offset table. they go rich on decel. i found a post saying , i believe 12% decrease, but may have been only 10. once i changed the offset table they worked great. well except for the 185% duty cycle. lol

TORCHD 02 TA

iTrader: (39)

anybody else out there???

Chris81

iTrader: (1)

The 42's would work fine, just make sure they are accounted for properly in the tune..

I'm about to use the GTP injectors (40 lb @ 58 psi) since I have the GM ASA pcm files that uses them, so when I change them the tables will be "correct" for the injectors, and they are cheap if bought used which is a big plus.

I'm actually about to use a cam almost identical to yours with some heavily ported heads and more compression, should be interesting.

CALL911

iTrader: (17)

42's sound like a little too much to me as well for what you have. You need a good injector that is the appropriate size for where you are at, not for future mods down the road.

Personally, I think a set of 36# SVO's would be perfect. I actually have a low mileage set I am looking to sell for cheep. If you are interested let me know. Even if you are not, I still wouldn't go that big.

TORCHD 02 TA

iTrader: (39)

what do the SVO injectors flow with out Fuel Pressure? I guess what i am saying is that the SVO are really 30#s but with our fuel pressure they flow at 36#s????

How much you looking to let them go for?

CALL911

iTrader: (17)

That is correct. They run a good $300+ brand new. Mine have less than 4,000 miles on them, and I could let them go for $255 shipped.

koolrayz

iTrader: (26)

I took a moment to go to the sticky. It took me to RC's website and I ran the injector sizing program for you. I used 450hp (flywheel) and it said 30# injectors at 43.5 psi would work for you. Now the red tops (30#SVO) I recomended would flow 36# and leave you plenty of room to grow. As was previously stated to big is not better.

TORCHD 02 TA

iTrader: (39)

thanks i did the calc too. i too got 36#s. i used 500 crank HP. So we are not to far off.

My other question is since my duty cycle is 98% right now. What will the 36#s do? If it lowers it which it should how low will it go and is it a good thing?

So when you buy the SVO 30#s, they are not the 36#s. they get the term 36#s b/c of our high fuel pressure. I just wanted to make sure that i was clear that is all

EDIT: what is our fuel pressure at the fuel rails?

CALL911

iTrader: (17)

Again, you are correct about the injectors. They are 30# SVO injectors that with our fuel pressure are actually 36# injectors. These would be right about perfect for you with a little room to grow. You don't really want a duty cycle to be 98%, the SVO's will not be that high and be perfect for the mods you have on your car.

02TransAm/Batmobile

iTrader: (32)

Jonas, I thought you want to run some Nitrous with that too?

TORCHD 02 TA

iTrader: (39)

Nope no nitrous for me

TrakDay

iTrader: (7)

You could look for Ford lightning 42# injectors on ebay. They can usually be had for pretty cheap. Or look for a set of 36# injectors. Honestly if you can find the injectors you want already used... You can save a little bit of money!

CALL911

iTrader: (17)

I still have the barely used (less than 4,000 miles ) 36# SVO's up for grabs if anyone is interested.