I have an 89 Iroc 305 TPI 5 spd. My friend went from a carb to the FAST system on his 550 hp 406 in his '67 Camaro real nice set up works really well. My 305 TPI has a serious case of the TPI blues. It wont run now and even when it did it wouldnt pass emissions. The TPI is original practicaly every fastener is seized you try to loosen them they break off etc etc. It's time for it to go.

I found if I put a 400sbc in up here I can register it as a "Hot Rod" and be subject to less stringent emission standards. I have the 406 sitting around and I was thinking of putting on a set of vortecs or E streets, a mild cam and one of these TB efi set ups and have a nice torquey daily driver type of car around 400hp that still has the A/C and I could drive cross country in a heartbeat

I think this set up in the long run would be a lot cheaper/easier than a LS swap. Anyone ever switch to one of these efi's? issues?

 

You could always retain the TPI (kind of) and go to a miniram or a Stealth Ram, which eliminates most of the problems with TPI, you just lose a little torque with the stealth ram and making it fit under the hood is a task as well

 

check out dynamicefi.com for the ECU....And its data logging system...

 

I like megasquirt. It's single cable, real-time tuning, and has autotune functionality for warm up, idle, part throttle, wide open throttle, AE, and so on. It has real closed loop functionality based on wideband, and uses AFR tables. (meaning you can have a target AFR for each cell). Has boost control, nitrous control, launch control, generic outputs that are conditional. Everything is done with the same program and it is updated frequently.

It has 32x16 fuel map split into two tables. (512 points of resolution, where stock ECM's typically have 268.) The only stockish system that has more resolution is the EBL at 37x14 over 3 tables (518).


-- Joe

 

Sounds nice. My buddy put his on a carbed engine pretty straight forward, Im wondering how hard it would be to put one on a TPI engine from an electrical point of view

 

Depends. Lot's of ways to do it. I did mine by putting the megasquirt in an GM ECM case, and soldered jumpers to a dephi connector, so it was "plug and play". However, I think if I were to do it again I'd just cut the stock connectors off and splice a megasquirt connector.

-- Joe

 

Oh I didnt realize you had done this conversion on your car. Exactly the input Im looking for. Cool. Are you happy with the performance? How much power do you think you're making? Any pics?

 

I had been running stock ECM's for well over a decade, so I'm quite experienced with prom tuning and the available software. This is night and day compared to that stuff.

My combo is good for over 600hp. In theory, I could probably make 700+ if I turn up the boost but the block would break.

-- Joe

 

Awesome....a lot more than Im looking for in this application but you have that in front of a T5?

 

Yep. T5.. I've got a spare as well. If you shift properly, they last.

-- Joe

 

Thats what I thought too. Guys act like you cant drive a T5 for 10min behind 400hp....BS

 

Bump....anyone do a swap since this thread?

 

DScott, I'm running a FAST EZ system on my 89 FORMULA w/TPI and I love it. You will need pn 302000 which is a multi port retrofit kit. All of the plugs are there for tps, iac, map and so on. You will need to connect about 8 wires otherwise.

If you have any further ques just ask.

Sent from my iPhone using IB AutoGroup

 

So youre just running the Fast electronics on your TPI? or the whole Fast EZ system with the throttle body and everything?

 

im running the electronics only. the 302000 kit is designed around the TPI and has all of the plugs on the harness for the TPI. it turns your MAF system into a SD setup.

the only thing is you will need a old style dizzy and I suggest a narrow cap remote coil dizzy OR you can run the 30404-kit which controls timing and you can purchase the 305005 distributor that plugs directly into this kit.

this is my initial thread about my EZ install.

https://www.thirdgen.org/forums/dfi-...i-install.html

here are 4 threads by BOSS357 and his EZ install.

https://www.thirdgen.org/forums/dfi-...i-install.html

https://www.thirdgen.org/forums/dfi-...ng-ez-efi.html

https://www.thirdgen.org/forums/tpi/...stock-ecm.html

 

I forgot to mention, when my system was first set up we set it up in the eng bay in a manner just to find out where everything went and NOTHING went outside then eng bay.

we tapped the ez into the stock fuel system wiring harness which wasn't any problem. like I said, there are about 8 loose wires that you will need to do yourself and they are marked.

the black and red go to the batt, the gray goes to the a/c, the green pnk and yellow go to the dizz and fuel pump and 2 others for the switchable 12v.

 

Oh sheesh sorry like I said in my original post Im looking to go from a TPI to one of the complete TB set ups from FAST, Holley or MSD.

 

With the 2 systems I mentioned those will work with the HSR, MR, SR or any other aftermarket intake.

Sent from my iPhone using IB AutoGroup

 

Not sure why you would go from the TPI to a throttle body but if you did I'd do the Holley. Way more tunability than the others by far.

 

I think he means the variety that have the injectors just below the throttle blades, so a formerly carbd car owners can use the same intake. Though port efi is probably better still.

Like Joe I have ran MegaSquirt 1, 2, and now 3. I switched from TPI with the GM ecm before rbob had his product out. If you already have a TPI engine and don't like wiring rbob setup is the way to go. If you don't mind wiring and reading and enjoy ultimate ecm control there is non better than MegaSquirt!

 

Like I said in my first post the TPI is original you try and take it apart and every other fastener breaks off. I also find it very difficult to work on. You cant get the injectors out without disassembling the whole thing...crazy! Theres lots of guys on here who haven't been able to get their TPI"s running properly for YEARS! I dont want to become one of those guys. I dont want to have all kinds of custom tunes burnt. I want to drive the car

Like I said my buddy put a Fast throttle body efi on his car, self learning, very impressive.

 

You gotta remember most people don't know what they're doing. That's why so many end up with cut wiring harnesses and a carb.

 

if you go with the 12903-kit, 307603, and the 302000 or the 30404-kit you will still have a tru port style system as the 12903-kit has injector ports in the runner and is easy to maintain.

if you go with the 30227-kit it is a "wet" TB as the injectors are in the TB. being you want to get away from the TPI you will need to buy an intake. another option would be the edelbrock intake that has the injector ports in the runner.

 

I think efi guy meant "why would you get rid of port injection".

The torx hardware does snap, and the stock TPI manifold isn't known to be a big performer. If you are building a 500hp 383 you should consider an alternate port style injected manifold.

The "self tuning" stuff is nice, I use that functionality to build my VE tables on megasquirt cuz it "just works",and it does it in actual real time without having to stop and resync or any of that nonsense. With that said, I wouldn't buy something that completely ties your hands. Sometimes you just need to exclude part of the table from self-learning cuz you know better.

Also you want something that controls timing.

-- Joe

 

This Edelbrock kit controls timing....at $3995 (Jegs) its pricey. For 6K I could get a Ram Jet 350 crate motor (350hp/400tq) that would fill my needs very nicely and comes with a brand new engine attached. And it will bolt right in, A/C everything bolt right up, not overpower the t5 and rearend. Like I said in my first post Im looking for a nice reliable driver Im not looking for a race car (have one of those!)

http://www.edelbrock.com/automotive/...xt-chevy.shtml


Ram Jet 350

http://www.jegs.com/p/Chevrolet-Perf...49882/10002/-1



Do any other of the systems adjust timing?

 

Heres the car



Oh and btw thanks for all the replies guys I really appreciate it

 

Did you experience any problems with your speedo, gauges etc. when switching over to FAST? The tech at FAST told me they would not work?

 

do you remember the tech's name? being your car is 89 everything will work unless they did something a bit advanced for the Camaro that year. my tach, cruz, speedo and all work.

from what im thinking, the SD guys will have to find a way to power up their ECM so their stuff will work being a lot of stuff was integrated into the ECM. if you go with the FAST system I can tell you pretty much what goes where on initial setup.

if you have any more ques just ask.

 

The gauges are wired directly to the cluster.

The speedo would only be an issue on 90+ Camaro's that had the VSS wired to the ECM. Even then, and I vaguely remember how the factory wiring is on those - you can probably get around the issue with a 4-out buffer from a firebird.

My Speedo on my '88 Firebird is wired independently of my aftermarket ECM, in fact, I'm not even recording speed in my ECM at the moment.

-- Joe