what injectors should be used on a 347?

Grn92LX said:

Can you post the graph? What is your exhaust combo? Why would you remove a working chip? I had a chip and removed it because it sucked. Hope the shop burns to the ground too Now I run a PMS and I have a wideband kit on order

Click to expand...

well the chip was pulled because it wasnt a good overall tune... even running the 94 on hot days she would still ping, would need some octane booster, so in this hot weather we have, its just not practical to be running like that.

exhaust is BBK equal length, prochamber, and American thunder catback

stang2004 said:

he is talking about my car...

has 185 AFR heads, Lunati cam, and RPMII intake


i already researched about this, but he's concerned.

i know guys that are running 19# injectors fine with 320 at the wheels...

the 24#'s i have on there shouldnt be a problem,, sure she could probably benefit from 30#'s but its not a neccessity

Click to expand...

My take on inj size is this.

Looks like some thought was put into choosing the heads & intake for that combo.

Why not use the same reasoning for inj size choice?

This guy & that guy did this and that......................

Why trust your combo to what some guy says or even what I say.

There are various formulas to at least give some guide lines and get closer to the FACTS than what some guy says.

Remember that those formulas usually deal in fwhp not rwhp.

So many want to skimp when it comes to inj size but why? It could cost performance or safety or both.

To answer the Q ...... I'd go no less than 30's with ANY 347 combo.

Later
Grady

If you go to sites that sell complete 347 packages (turn key), they are generally using 24's. Id say if you have all the supportive stuff (exhaust, custom cam) etc, that spruces the turn key combo up a bit...you will be fine with 30's. As of now, that's what I plan to run if I get that combo....Perhaps Mike can shed some light when his combo is done.
RC