has anyone ever tried to adapt conventional (ie. tpi injectors) into a tbi unit?? I figure with a little work, adfp reg., and some injinuity we could have an indefinately adjustable fuel delivery sys.....all you need is the chip to fire them but the chip would work with the current computer....

chris

 

yes, somebody makes an adapter bung sort of deal that allows you to mount a tpi style injector on anything.

spray pattern is what you would worry about, and fuel flow would make injectors EXPENSIVE...

 

I think he's talking about putting 2 where the stock ones are???

 

exactly Tas....put two injectors where thestock ones are that flow...could it in theory be harder than hooking up a rail to accept them with the adfp reg. and then spice in to te factory connectors with the tpi style units.?...it's all theory bt if anyone has a spare tb they want to donate to an experiment we could all benifit from in theory......I'm willingo pay shipping and fund it if you guys think i can bedone....eve if you don't think it'll run.

 

put two small tpi injectors in place of the big tbi ones?? huh? why? I'm lost.

 

http://www.rceng.com/prices.htm

1500-1600 cc/min = 147-158.9 lbs/min

um, THATS A LOT OF FUEL FROM ONE INJECTOR.

there are tpi injectors that flow high enough to use them, but they wont meter the fuel as presisely.

No, thinking or trying this would not be worth the money to do it.

 

Um, thats like new math. Graduate from the Ray Charles school of math? I'll give you that its still alot of fuel, but your units are incorrect.

TPI injectors wont meter fuel as precisely? As what, a TBI injector?

 

using a tpi injector woudl be a lto fo money. stock 305 tbi injectors are 48pph, i think stock 305 tpi's are only 18pph, 350tpi is 22, and i think LT1's are 24. so you would need to use a pair of LT1 injectors to get the same pph.
plumbing and bracketing up teh idea woudl be easy enough, but buying 4 injectors would cost as much as a complete 454tb prolly, and the 454tb is a plug in basically(gotta open up teh holes on the intake, but any machine shop can do that.)

later
tim

 

Oh yea, I forgot to mention what a rediculous idea it would be to put TPI injectors in a TBI setup, on TOP of the TB. Mostly for the reasons of how little 2 or 4 of them would flow, unless you got some real mondo injectors. And last time I checked, most were sold in sets of 8... You gonna go to all that work, do a port injected setup.

 

The amount of work seems to outweigh the benefits....

 

ya know i'm just trying to think of ideas here...i'm not looking for guys to say how dumb it is or "rediculous" it would be....last i checked we're all looking for a way tomake these things work because we're not all made of money....i figured since you can buy aftermarket ijectors with crazy pph levels it could work (i've heard of local speed sopsworking with 65pph units). if you need a car to run it why not? what if i fund a cheap way to do it? what ifyou know enough people to be able to buy just 2 injectors. Maybe i'll just call accel and have them make me a setto fit in the stock housing and spend $600 for both of them then $350 for someone i trust to burn me a chip(since i'm not computer inclined and full of money enough to have my own burner). I'm trying to follow the idea of Car Craft mag...got fast for cheap. I just figured i'd get some opinions...If you think it's a bad idea just say it....not that it's crazy.....back in 1900 it was a crazy idea for a carriage to move ounder it's own power (not pulled by horses). Now look at what we have.....cars that go 4 sec in the 1/4, top 300 mph, have broken the sound barrier, oh ya, and they pull over 1g on the skidpad (for those of us that like to turn left and right). That was crazy then..... nobody ever thought that we could do that.....same principle....it's not crazy, but isit cost effective and possible. That is all, i'm going to bed........
chris

Iroc22 said just what i was looking for.....

 

You KNow i think a better way to go about it would be a way to get a 4 barrel TBI setup to work with the stock computer and harness. that would solve most of the problem with TBI wouldn't it?

 

cheap and fast would be carb

i read that the conversion factor from cc's to gallons was to divide by 10.2

What i meant by not metering as presisely was a fuel injector weather it was tpi or tbi flowing that much would never be able to move fast enough or actually, slow enough, especially at 40psi to NOT flow too much fuel at idle, therefor not metering as well as the stock or closer to stock fuel injectors on a tbi setup.

sorry madmax. not trying to misrepresent. actually i got all those numbers together after surfing for bout 3 minutes. guess i shoulda checked myself with other sources.