30# injector Values

[ws6ick]

I have installed bigger injectors in my 2000 Trans Am. I went from stock which I believe is 26# and I have installed FMS Redtop 30# injectors. What do I need to do to tune the car to get the new injectors to run properly?

I was told that all I have to do is go to Flow Rate vs. KPA and add 4 to the whole table.(You get this by subtracting 30-26= 4) Is this correct?

[SAM]

I pulled up a stock Z06 Tune and just pulled all the fueling numbers straight frome there, due to they came out with 30# injectors from the factory. The numbers are different than what you get out of the calculator but I figure GM hopefully knew what they were doing. You will need to double check your VE tables, and also check you MAF table.

[ws6ick]

I also download this and if I put these values in, they are much higher than if I was just to add 4 across the board.

[coanan]

I used the same calc and when I moved the numbers to my tune they changed some, 41.685 went to 41.655 and so on. why?

[ws6ick]

I tried just adding 4 across the board and it was a no/go. I went back to the numbers off the sheet I posted above and it now runs. I guess I have some other areas to work on.

[FourG63 97GST]

http://www.robertsnitrousservice.com...ingwriteup.htm

scroll down to injector scaling

[eficalibrator]

http://www.robertsnitrousservice.com...ingwriteup.htm

scroll down to injector scaling

Ack.. More bad/incomplete info on teh intarwebs... That writeup gives the wrong ASSumption for Ford fuel pressure. Ford actually rates their injectors at 39.15-39.5psid, not 43.5psid like Bosch (the injector manufacturer) does. It also completely misses the point of correcting the injector offset vs volts (vs kPa vac) table along with the short pulse adder. These are different between the red tops and the OE LS1 injectors even though both are made by Bosch.

Give me some time and I'll have the right injector data included with my training DVD this summer so you guys don't have to rely on bad info from other sources.

[Whiterhino]

Ack.. More bad/incomplete info on teh intarwebs... That writeup gives the wrong ASSumption for Ford fuel pressure. Ford actually rates their injectors at 39.15-39.5psid, not 43.5psid like Bosch (the injector manufacturer) does. It also completely misses the point of correcting the injector offset vs volts (vs kPa vac) table along with the short pulse adder. These are different between the red tops and the OE LS1 injectors even though both are made by Bosch.

Give me some time and I'll have the right injector data included with my training DVD this summer so you guys don't have to rely on bad info from other sources.

I've looked at quite a few svo 30# setups and no 2 were the same. Mine were adjusted years ago by a tuner and they are the lowest values i've seen. Would using redhardsupra's sheet get me close enough at the 43.5-58-30 calculations?

Here's my tune if you don't mind looking.

[ws6ick]

http://www.robertsnitrousservice.com...ingwriteup.htm

scroll down to injector scaling

Thanks, This helped alot. I just used 39.15 psid for the Ford injectors. I believe in the writeup, he used 43psid because he is working with 42# injectors.

[Cantalope Kid]

Use injector scaling method (2) on Roberts Nitrous website. Its the excel spreadsheet. Same as here. Forget the simply add 4 crap in the editor. Let the spreadsheet do the math for you. Its easy and takes literally 60 seconds to complete copy/paste/update once you obtain the correct flow rating for your swap in injectors. All you need is the lb./hr @ X psi for the swap in's. Then you simply plug in these values in the excel spreadsheet and copy/paste to editor IFR table.

[ws6ick]

Thats what I ended up doing. Its hard to find what the FMS 30# red top injectors flow rate is. I have been doing research and some say 39.15 and some say 40. I am going to try them both and see what happens.

[Cantalope Kid]

Deleted So No One Copies Bad Data In The Future.

[ws6ick]

Can you send me the link to his website?

[Cantalope Kid]

Don't have it handy. I just typed in all that stuff above by hand off the paperwork I have in printed format. Will post if I can find it...

[ws6ick]

Red Hat Supra has the SVO 30lb. injector values with corrections already posted on his website. Here is what I have in my file-o-sh!t to compare one day...I have (2) sets of SVO 30lb./hr. redtops in boxes awaiting install. I'll let you know what I find out. I recently installed a set of Fast rated 36lb./hr injectors in a friends ride and using the injector spreadsheet they run like a champ at approx. 42lb./hr @ 58psi.

Anyhow see if the below helps you out. Copied directly off Red Hat Supra's website. I don't believe his write up is incorrect. Shouldn't be as this guy usually is more in depth than an IRS tax audit.

Ford SVO 30lb. (34.6lb. supposedly for us @ 58psi.)

34.64162706 34.85752419 35.07209232 35.2853557 35.49733784 35.70806157 35.91754903 36.12582173 36.33290055 36.5388058 36.74355721 36.94717396 37.14967471 37.3510776 37.55140031 37.75066003 37.94887350

I input these values in my IFR and it ran like crap. I had to keep my foot on the gas to keep it running.

[golfinz]

You cant just import the values and expect miracles

[ws6ick]

I ended up doing an injector scaling @ 40psi and it works fine now. Thanks!

[Cantalope Kid]

I input these values in my IFR and it ran like crap. I had to keep my foot on the gas to keep it running.

Goes to show you how outdated some of this crap is. I always use the injector spreadsheet myself...

[Cantalope Kid]

Here is what I came up with based off of Fords 40psi. rating for their injectors. Hope this helps someone else in the future.

Someone needs to sticky these damn values besides LS1tech.com...(Mods?)

Ford SVO 30lb. @ 43.5psi (Flow approximatley 36lb. @ 58psi - in a my Fbody)

PN # F1SE-E9A 280 150 945

Enter into IFR table:

Removed so those that sell books/teach tuning classes can continue to recieve our financial support due to our future ignorance.

[golfinz]

I agree, but I wonder if they flow exactly* 36lbs...Im anxious to see Greg's numbers as IFR seems to always vary