ok first of all i have a 84 s10 that i did a v8 swap in i understand that this is a third gen website but you guys would know better than anyone else. that being said i just built a 1968 327/350hp model and i have a eldlebrock preformer intake with a 650 holly double pumper on it. Now im not a carb person my dad is i hate them and this carb has sent me to hell and back. My dads away right know and i want to convert my fuel system over to a T.P.I. system off an 85 IROC. there is no computer in my truck now and i plan on buying the step by step book explaning the proceedures. But my main queestion is will it work on a 327? im willing to do modifications but not to any extremes. the big thing im wondering is if i go out and buy one will i be albe to make it work. the engine has about a 1000 miles on it and i just spent 4 months building it so im not ready to part with it however my carb has caused so many problems i just want to rip it off and melt it. what would i need to do to make this work??? i got like 3 weeks and the wiring dosent scare me but im new to injection and dont want to screw myself also i have a TH-350 trans no thats built like a rock but only has 3 speeds now from what i understand theres a wire or 2 the goes from the tpi ecm to the trans and if thats true will it work without it or do i need to throw a 700r4 in (i really dont care i want the 4 gear i just want to know if it need to be done first). Now ive heard alot of talk aout how the tpi system is good for higher power app. but its affordable right now and i want consistancy more than anything plus ill be driving it im michigan in the winter.
now im in a bit of a pickel and i have a tpi system i could go buy and get started on but like i said i havent seen anything realting to 327 so i would figure that it would just run rich and i could compensate by a fuel regulator and by throwing on this msd box i got sitting on the floor. so bascially if i need a specail chip or something i need to know now i appreciate any help i get thank you

 

iznataszi,
any small block designed before 1992 can be
retro-fitted with a TPI. a complete unit,
harness, computer, chip, dist, and filter is
$1700. you can try and piece a stock harness
together (good luck) and find a salvage TPI
for budget reasons.
now the semi-ick news:
due to the MAP sensor and the stock computers
large lobe speration cams can be a little
disrespectful. if you have better than 16" of
engine vacuum, you can TPI it.
transmission:
TH350 is a three speed mechanical trans
TH350c is a three speed mechanical trans
with a lockup torque converter.
TH700r4 is a four speed mechanical trans with
a lockup torque converter.
the wires you are referring to are for the
lockup function and dont have to be used.
the lockup is a mileage function.
chip:
id treat this as a 350 engine and step back the
fuel curve 7-8% due to the smaller cid.
stock 350 injectors and 38-42psi fuel pressure
would be enough.
the only other things to consider are:
fuel return 5/16" is ok, but 3/8" is better
fuel pump is better intank but more expensive
unless you already have a intank pump
distributor clearence the small cap would be
better for clearence.

gimme a call 501-9450354 deano
airdeano

 

The 85 system isn't the best to start with due to replacement cost of the MAF burnoff relay.

Key idea here is: Cam it appropriately, and I would do headers without question.

Get a tank from an EFI truck, and a normal TPI pump. You will need to run one wire extra to the tank and the ground & sending wire are the same.

You should have, in the 84 an ECM harness hole in the firewall. To get my harness (86 Camaro) to fit my Monte, I got a Monte rubber grommet, and cut away at the inside of it for more room, and it works. It's a bit more harness than a 4bbl one though.

Get an 85 service manual for an F-body and one for the 84 S10, and match things up. Your dash harness will have a wire that goes to the SES light, a wire that switches the ECM on, and several others you need to match up. There are additional power feed wires that you'll add (mine are from the column crank wires, pink and yellow I think) for injectors, and that one back to the tank.

It's possible to run an auto PROM w/ a stick tranny, but the 700-R4 would be a great addition if you have a th350... Ah... If you have a lockup TH350, it will work with that. You do not need the 700-R4 for the ECM to be happy.

Misconceptions about 327's: they rev like hell. Um, yeah, in the '60's when they didn't have the head & cam tech to make them make a flat torque curve... Ask someone who calls a 305 a stump puller, a 350 a better stump puller, then the 327 a screamer WTF they're talking about

You can do this. Go with the GM harness if at all possible It will have the leads for TCC, air conditioning and little stupid crap like elec. fan turnons (85???) that make it a nicer swap than others.



------------------
jmd
1986 SS with...
86LB9 TPI atop the original L69, Hooker emissions legal PN 2050 headers, stock L69 cat (yes, a real one), hydraulic clutch T5, Energizer 272 cam, chargedair.com fan, Global West CNR-88-C negative roll kit, 89 Iroc front springs, CC635 Moog rear springs and a whole bunch of other fun stuff

 

Wow, 1700 for a complete TPI set-up. I'll tell you what, i'll sell you my whole ported set-up for 1500, lol.

But since he apparently already has a TPI set-up off an 85, i reckon he doesn't need to buy one.

Now here's MHO. Screw that 85 computer/harness. It's primitive junk and you will hate it to death if you ever want to make power. Not to mention the cost of the MAF and the burnoff relay if one of them should fail. Here's what you want to do.

-pick up a 730 (or 727) ECM. it's the SD TPI ECM, but it is actually very common as it was in a whole bunch of the 60' V6 cars, like the beretta corsica. Shouldn't cost you more than $50, more like half that at a junkyard. More can be found on this on the DIY prom board or searching here.

-pick up an aftermarket TPI harness from painless, etc. Shouldn't be more than a couple hundred bucks and will be inifinitely easier to use than trying to retrofit a GM harness on a non-stock chassis, with a bunch of extra wires in it to boot. The right wiring harness is the key to making this easy

-run an external fuel pump. Real easy to plumb back by the tank, and you don't have to drop the tank if you ever need to replace it. Then again, getting to the tank on an S10 is prolly gravy, and the tank just may accept a later S10/syclone/typhoon pump/sender assembly. I don't know for sure.

-start reading up on the DIY PROM board and get ready to start burning your own PROMs. To get a baseline chip, all you need to do is set the cylinder size and injector size, as long as you're not too radical either a 305 or a 350 chip will work as a fine baseline.

Beyond that it's just a matter of bolting the parts on and hooking the sensors up. Speed density is about as simple as you can get, and you are bypassing $700 or so worth of junk that is prone to failing on the 85 set-up. Don't let anyone convince you it's a difficult project. Physically bolting the parts together is easy. And with the right harness, hooking everything to the right wire is just about as easy.
...ed

------------------
Ed Maher - Moderator @ The TPI & Carb Boards
92 Z28 Convertible - Quasar blue / Tan top
305 TPI A4 2.73 - 14.74 @ 93.25
Stock except ported plenum and dual cats
-=ICON Motorsports=-

- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die

[This message has been edited by Ed Maher (edited October 17, 2001).]

 

no i dont have one im thinking of doing it and have looked at some locally now i really want to do it but and worried if i hook everything up im going to have sputtering problems and such that i wont be able to figure out i want a setup off a 350 not a 305 but im trying to get the setup cheap cause i KNOW ill need other stuff and this is the one car i have and im working on it now and the whole idea was reliability so if someone unistalled it LEAVE THE WIRE ON AND DISCONNECT from the ecm

 

hey ed or anyone wanting to help me out my phone number is (810) 979 1566 i like the idea you had and would like to pursue it cause i want to be able to burn my own proms thanks to all

 

o ya my name is mike i dont think it says that anywhere

 

A stock TPI will not support what you want to do. YOu will have to use an eldelbrock base and SLP runners for the RPM range. Oh and yes it is true that a similarly built 327 will out rev a 350. Its a law of physics and airflow!

------------------
89 Trans Am Turbo 3.8L All stock 43,000 miles #1053 of 1555

Past Thirdgen:
86 Trans Am w/ built 355TPI with SLP goodies and too much other stuff to List. One sweet *** car, wish I would have had a good enough Job to pay insurance on three cars so I could keep it, but for a 89 Turbo Trans Am w/ Low miles, I think I made the right choice!

 

so it would still work right away and that would be a preformace upgrade i could do in the future like in a few weeks the stock one will get me off the ground

 

Built identically, you would be hard pressed to tell the difference, but the 350 would be faster. I got your difference right here

 

ok im having a problem coming up with an exact list of things i need to get i found a guy with a 92 tpi setup minus the harness and ecm for like 300 it seems a harness will cost like 280 if its possible to get one cheaper IM ALL EARS!!!!!! now ill need a electric fuel pump $$$???? and i would like to know about that v6 ecm idea and alost i heard chips are pretty pricy and what about being able to program one i have a laptop so perhaps there is something that will hook up to that now im a kid trying to do all this under finacing from my mom and i need to com up with a final price list and i dont want to forget anything and do i need a fuel pressure regulator???? or with the electric fuel pump control that also i have a 327/350 stock cam its pretty nice but will i need to change it and if im going to need to get a chip and a cam im going to want more of a performance setup but it just keeps getting more expensive even though i keep finding cheaper things

 

I dont know if someone all ready mentioned this but. Dont forget if your going to use the SD computer your going to have to use a roller cam because those ecms (especially a 92 ecm) are overly dependent on the knock sensor.

 

ok i think after all the expenses i might just be better off to buy a holley 700 CFM Pro-JectionŽ Four Barrel Digital "DI" which is a computer controlled throttle body and what really scares me about the tpi is the custom chips ill need with this i should just be able to use a laptop to set everything and be fine no custom chip also i want to know if this would be to large of a throttle body and i would plan on putting in some sort of bad *** cam to complement the setup is this the wrong way or am i seeing the light would i need a smaller one or is this fine i would plane to take this to another car if i was to say buy a full size truck and just throw it on the 350 or whatever and as for the price its a little more expensive but it will work and im not sure if 200 less is worth the headaches so this costs like 1300 from summit tell me what ya think

 

you might want to get some input from users
of the pro jection... ummm.... ive heard some
not good things... one thing to consider:
if something breaks, burns out, or fails
where ya gonna buy that part?
TPI parts can be found in lots of places,
the pro jection will have to be red labeled
(at your cost) and you hope that fixes it..
just something to think about...
airdeano