hey guys, i was just doing lots of searches, and was trying to figure out what applications they were used in, and if any part numbers are available at all? i kept reading about these such injectors, some 100, 125# and was likeing to gain more info about this. As i think i have found a source overseas to get their hands on some if we can provide a part # or application..

cough.. Fast355 ?

 

They are out there. Issue is idle quality. 80 lbs at 20 # FP required I go to synch and OL idle. I think I am 1.2 msec at idle which may be minimum not sure. . A larger injector may create overly rich idle A/F.

An even better thought is VAFPR to reduce the FP at idle yet allow a decent number on top.

 

yea, we are aware of that... its just me and the guys on 454ss forum are looking for a part number, if these things ever even existed! application or something... someone is in Mexico right now and someone else have access to overseas parts.. we need a part number.. im sure a marine tbi with vafpr will work just fine... but when your trying to feed a tbi 496, we need things like the biggest tbi injectors..

i guess nobody knows any #s....

 

I think Fast listed an application. A search may bring it up. IIRC it was a 1bbl TBI unit on an inline 6? Does that sound right? The vehicle is sold in Mexico.

RBob.

{edit: found the thread, mostly a worthless thread, Fast stated:

"125 lb/hr injectors were made for TBI applications, just not in the US. Mexico used a 292 I6 that made around 200 HP and used a SINGLE barrel TBI unit with a single 125 lb/hr injector."

(https://www.thirdgen.org/forums/tbi/...co#post2856249)

Which made the whole thread worthwhile. It is probably a truck that used that engine. }

 

I found a set of injectors larger than 100 lbs/hr here in the states.

https://www.thirdgen.org/forums/tbi/...injectors.html


The Injectors are most common in the Brazil market. They were used in cars such as the Omega, the Opala, and Trucks.

They use the 250 inline 6 with either TBI or MPFI and a 4L30E transmission down there. They perform VERY WELL for what they are too.

252 KPH = 156 MPH!!!

http://youtube.com/watch?v=V0To_u0z3mw

This one is MPFI and on a dyno, but they are tuning it with a laptop like our TBI can be.

http://youtube.com/watch?v=peaY5JQaD-g

Yet another use of the 4.1, the earlier versions were TBI

http://youtube.com/watch?v=_C_25tGMNYQ

http://youtube.com/watch?v=ZHNTVPyXElg

This one is TBI/4L30E era (427 PCM?)
http://youtube.com/watch?v=mcKPYpWg01c

The Opala is the car that made it possible all these years down there for Chevy. They have made something like 10 million of them.

These cammed up 250s sound good, IMO.

http://youtube.com/watch?v=zRNmfLGMsqM

http://youtube.com/watch?v=BKa9h_p0-mw

http://youtube.com/watch?v=tWA5hmhpOQ0

Trucks

http://youtube.com/watch?v=XE2q_eJqQiU

 

Here is what one looks like, you have to use a C60 series truck style injector pod though. I like them better.

http://produto.mercadolivre.com.br/MLB-65402574-_JM

What I find even stranger is the fact you can get MPFI injectors up to 160# over there. They are into BIG HP on Alcohol. Alcohol takes roughly 2x the fuel as gas to make the same HP. See the trend.

http://produto.mercadolivre.com.br/MLB-65184593-_JM

On a side note, they are running the CSFI 4.3/305/350 on Methanol down there. I bet the poppet style injectors flow even more than ours do here.

http://produto.mercadolivre.com.br/M...tor-aranha-_JM

Attached is a picture of that Export L31 from 1997 that supposidly doesn't exist.

Also they made a NBS 2000 Silverado 400ss with a L31 350 Vortec in it.

 

damn FAST355 thanks for clearing that up... i got alot of flak over on the SS forum, as the guys didn't believe anything over 80#s even existed.. i was like im sure there is... but they already had their minds made up, some atleast did... i didn't know that they were used in so many different applications...

we may all be able to put in some cash and get a few injectors back to the states.. i would love to run something bigger, but in my case 85# is all i need.. but 454ss on FSC also is looking for some for a 496 build up..

what are the interchangeability with the pods and these injectors, i need more info on what pods can be used.. it also amazes me they are tuning it like TBI, prob the same software.

 

how do u change a tbi to a MAf controlled?

 

80# @ 12 psi = 122# @ 28 psi.

Same injector, just rated at the higher pressure. Could that be where some of the confusion is coming from?

 

i believe they were low psi configs/ratings... but that is a good question.. what had they been flowed at? i doubt they would use 28psi of pressure in a car or something small..
----------
that 1 injector in the pic looks kinda of crazy.. but if im correct, after reading.. dont the different injector pod interchange with the stock gm pod? so it would bolt up to a TB?

 

It won't fit in our stock injector pods, but it will fit in a stock GM pod that will bolt directly to our TBI units. This is the HD truck TBI unit.

The injectors that I have are roughly 105 lb/hr @ 11 psi, based off what I had to set my injector constant to to get the BLM readings back to 128 after swapping to them.

 

that's awesome. Imagine the horse power possible with enough airflow. love it

 

OMG!!

so it fits a stock GM pod that works with our stock TBIs... that is amazing... that TBI pod looks futuristic, as its different... lol..... hey Fast355 when are you going to get your hands on that pod and get 2 of those injectors to feed a 396? im not sure how strong the American dollar is anymore.. but should be alot cheaper since we have US$

im sure the 454 guys will love that setup... the GM HD truck pod on the BBC 2" tbi with those bigger injectors... then with a little more psi, if someone has something extreme...

what is that regulator setup for? it looks alot bigger than our regulators.. or maybe its just more external and on top...

thanks a million Fast355... i know my SBC 383 wont need such, but maybe i do a BBC in the future.. maybe who knows a TBI feed 502.... if it can feed it with air.. or dual TBI intake manifold, with dual TBIs, and 2 HD truck pods, with 4 100# injectors...

 

So what size is the injector pictured?

 

on a totally unrelated topic, i love how brazilians have bagged cars too.

 

So what size injectors come in this unit? 75 lbs/hr?

 

I agree. There are some fine brazilian women out there.



The thing with TBI is even if you get big enough injectors to feed it you still have idle issues because you are trying to fuel so much with only two injectors.

 

A vac referenced FPR would help with the big injectors at high FP.

 

 

 

Somewhere in that ballpark is correct as they used the same injectors on both big blocks(366 ~ 180 HP, 427~ 240 HP). The 4.3/350 pod is identical, but both have smaller injectors. I have never had that style pod on the flow bench with the stock truck injectors in it. I had 2 of the 3.0L (145 HP) Marine injectors in it when I had it on my 425 HP 305.

 

Thanks. I tried running the number off of the injector itself to no avail.

Were they run at the normal TBI low pressure?

Only injector I could find with that configuration was for the J car.

You have a source for the Marine injectors? I'm assuming 2 3.0L (145) = 290?

Also notice the pod spacer appears a bit shorter than used on the standard BBC TB.

Thanks!

 

Those injectors look itty bitty in size lol. Are they physically smaller than the stock stuff or does a 2" TB give that impression? With that setup would it be possible to finally break that 520ish HP support limitation cap?

*EDIT* I just saw where the FPR is located. Man would that ever be easy to get to an adjustment screw on.

 

This Holley injector looks similar; don't know the flow rate.

http://www.fixthisride.com/showprodu...?prod_id=84533

 

and i got one!

end of jack

 

mmmm hmmmmm

 

 

I think the single injector used in the 93 to 95 CPI 4.3 V-6 spider assembly looks like a TBI injector imbeded into the plastic spider assembly.

I haven't seen just the injector listed anywhere for sale only the entire spider assembly but they have to be out there somewhere.

I thought about tearing one from the junk yard apart to see if it will fit into a standard TBI injector pod. Has anybody else looked into this?

If a single CPI injector can run a 200 hp 4.3 then two could run a 400 hp engine with no problem.

 

Anyone happen to know the flow rating and fuel pressure for the 1995 Vortec 4.3 liter CSFI / CPI injector? Doing the math.....it comes out to around 130 #/hr.

 

I have seen numbers from manuals in the 50 to 60 psi range for the CPI fuel pressure but the data was mixed in with later 96-up data so I don't know if it is accurate. I haven't put a gauge on my 95 CPI Blazer to see where it really is at.

I finally got a chance to tear apart a CPI injector spider assembly to get the injector out of it. It is a strange animal with six outlet holes in the bottom in a six-pack arrangement.

I haven't tried to fit it to a TBI injector pod yet to see if the six-pack outlet arrangement clears the end of the injector housing but it looks pretty close.
It may not seal to the standard TBI pod to prevent fuel from pushing around the injector and exiting out the bottom un-metered.

It would probably just pour liquid fuel out the holes without the poppet valves and distribution hoses though as the outlets look uncontrolled.

 

Thank you. Would you have the part number for the injector? I would like to look it up to see how much lb/hr of fuel it flows.

 

I will dig it out and take a look to see if there is a part number on it when I get home tonight.

 

I think I got it. Looks like 120#/hr.