just like always, somebody does something new (to the VQ), and it gets shot down.

 

maybe if sharif posted it?

 

I dont think this is a bad idea. I say go with it, you have my vote.

 

Yep. This is what I was getting at in the "cooling fan" thread. This community needs more people willing to try different things. We'll never advance the capabilities of these cars and these motors without people willing to do stuff that's different.

It irritates me when people bag on someone for trying different things. You never know when someone will come up with something that becomes the new standard.

Anyway, kudos on being different. It's nice to see others aren't satisfied with the status quo.

 

i think you interpreted it wrong, i liked what you did, i was defending it.

 

no, no, I think you missinterpreted what I said I meant it was shot down because I said it, and not a big name shop

thanks i think this is a great alternative to running super huge injectors and a $3,000 EMS

 

+1

I know the HKS supercharger uses a 7th injector mounted in the plenum, and I think this is how they achieved CARB certification

 

Hi Andy, looks good! I know Scott has used this method (added injectors) on a lot of the S2000's with great success. Will be very interesting to see the results. I know I only have 440's and the EU has a hard time with keeping things smooth unless at WOT. Quality fab work as usual from Scott. Can't wait to see the results!

 

I am not knocking it, in fact I kinda like it, but personally I wouldn't trust an EMS that sets timing by plus and minuses to what the ECU is doing. If your EMS could set the actual timing I'd like this set up much more. Regardless good job!

 

Its not new. its used by stillen.

Its a really really reallly reallly reallly unreliable method of fuel delivery. Id use it on my junkyard turbo setup for my civic but nothing else.

Our intake manifolds were never deisgned for throttle body injection. It causes un-even fuel delivery. Fluid dynamics is the key. In the end, there is a good chance of added fuel not getting to a cylinder at all. All the air still gets forced in there though. So its stock injectors at 8psi. YAY FOR YOUR MOTOR!

 

what if you took it one step further with aux fuel cell and ran the good stuff!good economy for race fuel and timing could advance even further under boost.(now this is really old school)wich would tell me if starving cylinders was common place i would have heard about it ,now if secondary injection drops out......then you got problems.but even that can be countered by a low fuel pressure ignition cut.

 

The setup looks great but wouldnt it be better to angle the injectors towards the front of the plenum instead of opposing the airstream? It seems like you would have problems with fuel building up on the sides of the plenum and not being distributed in the air.

 

i dont see how, with where he has them placed. like he said, directly behind the TB, and before every inlet, spraying directly into the charge for proper atomization, it does seem to work for those running meth or nos, and he has it setup exactly like those setups.

 

Exactly...with the fuel being injected against the flow, the pressurized air helps atomize the fuel and deliver it to all the cylinders.

 

It's only works in the northern hemisphere where water drains in the opposite direction...to get it to work in AU, you'd have to hook it up backwards

the thing with running the good stuff is that "the good stuff" runs out and is not readily available. This is primarily a daily driver

 

that's cool ,i was just expanding on the idea to show it is a legit form of fuel enrichment.there is a book written on dual fuel and secondary injection but i can't remember the name/author.

 

Np...i see what you're getting at...thanks for the support

I should have a final dyno sheet over the weekend to post up for you guys. Don't expect crazy numbers, though, because my 5AT is really holding me back right now. Most likely I will run wastegate pressure on low boost and ~450whp on high boost with the uber ugly yellow Greddy wireless switch Once I build the tranny, axles, rear diff, etc during the winter, then I will up the boost For now, I'm looking for a realiable 5AT daily that won't take a chit on me and even 450whp is pushing it, lol.

Like I said, this is a new alternative to running large injectors and having to scale them with an piggyback (not 100% reliable), or even a stand-alone ($$).

This has already been done on a 350z, and it worked great. The car is ran hard, tracked a couple times and no issues. AFR is right on target

 

Secondary injection has been used on OEM supercars for years. It definately has its purpose. What would be neat, is if someone fabricated a new lower collector, with additional ports for a second set of 6 injectors, and a supplimental fuel rail. This would provide the best distribution of fuel, and is exactly how the OEM's do it.

 

Thats a very interesting approach and its actually used by Stillen on the Nissan Titan Supercharger kit. Although they use 8 subinjectors for that. Kinda hard to tell but pic attached.

 

That would be staged injection not AIC like this setup.
Staged injection is used and widely accepted due to the fact that the location of the secondary injectors are calculated and designed into the plentium. Not grafted on as a second thought.