Tune-port install
 

I've got 2 305 tune-ports that run, and I'm wanting to put one in my truck. Is there a sticky about this or anything so I can see what all I need or can someone fill me in? Thanks in advance.

Brandon

Re: Tune-port install
 

For real, no one has any input?

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I know Akattack had a tpi on a previous truck, he might be able to help you out.

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I am in the process of finishing mine up. WOW what an undertaking, I hope you have patience for this.

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its really not all that difficult, iv switched my v6 camaro over to a tpi 350. if you have any questions PM me. a GREAT source for info on the TPI engines is thirdgen.org you will find TONS of info and TONS of people willing to help out.:j69:

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oh... why TPI? they look cool, but they flat line at about 45-4800 rpm. im planning for a LTX swap myself :metal:

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Yeah, I had one in my GMC.

Basically I used a harness from Painless. The wiring was easy once you read the direction carefully. (I had the power wire to the computer hooked up to a hot while in the run position....not the crank position :) )

Other than that I used the stock fuel lines, spliced in a fuel pump that was mounted on the frame, and extended them using rubber hoses (efi rated) up to the stock TPI connection point.

I think that was about it as far as getting the engine to run.

Honestly, I wasn't impressed with my TPI 350. I had heard how much low end grunt these engines had. I don't know if mine never ran right or what (no obvious signs of problems) but I wasn't impressed. I think I ran something like 15.9 @ 86 mph at the track. I figured that that was about 240 RWHP, so it put down the power (considering what its factory rating at the crank was) but driving it, my carbed 327 was more fun. I did get something like 18mpg out of it with 3.73s and a 700r4.

Good luck!

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15.9 sounds about right, and i belive the most potent tpi produced was 230 flywheel HP. low end torque was pretty stout, but yah 18-22 mpg is expected from a 700r4 with 3.73s. but like i said earlier.....they look cool, expecially pollished.

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My dad is actually the one wanting the TPI. He's also got a complete LT1 setup, but we figured this would be easier to do. And hopefully cheaper. As far as my truck goes, I've been thinking about putting the TPI on my vortec 350 and seeing what kind of power she will make.

Re: Tune-port install
 

The TPI motors flatline at 4800 RPMs, due to the port design on the heads. Change the heads to a set of Vortec heads and put on a baseplate for the vortec hook up and change the profile from 4800 RPMs to 5600 as a top out. I have a motor that I did this to and then sold it to a friend. The intake change and the new injectors produced a 375 HP motor with a lot of torque.

A TPI 350 settles in around 240 HP in stock form, and has a lot of pick up that a carb does not have. That is due to the design of the injection and the use of ALL of the cylinders at their peak fuel charges. A carb motor is lacking on fuel charge at the outer ends of the intake manifold so there is losses in the perofrmance in those cylinders.

Go the the Jags that Run website and they ahve an install book that has everything that you would want to know and a list of parts that will holp you install. www.jagsthatrun.com

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Ackattack, I didn't think you could use rubber hose when dealing with EFI? And also, if we are gonna be running the TPI all stock will I still need to have the computer flashed or anything? And how makes the better harness?

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you should be ok with the ecu in stock form,but it would be a good idea to have VATS and the egr taken off the ecu? you can get high pressure rubber fuel line, but i would go with steel lines spliced together with compression fittings. high pressure fuel leaks are BAD.and aftermarket tpi setups yeald a ton more power than the stock unit. the problem is not the heads, its the diameter and length of the runners that limit performance. accel,edlebrock,tpis,holly,slp and arizona speed and marine all make aftermarket upgrades for the tpi. ohh...bbk is said to be coming out with on soon?

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Is TPIS a good brand? I was doing some research earlier and came across them a few times. What runners are you talking about limiting power?

Re: Tune-port install
 

I put TPI in a truck.
These links will help you:
www.jagsthatrun.com
www.chevythunder.com
I bought the Helms manual for the car that I pulled the TPI out of and that helped immensely too.

I used the stock harness. I used chevythunder and the Helms manual to pull the things off the stock harness that I didn't need.
I used the stock computer, sort of. I had stock chip reburned to accept my motor (305 to 350) as well as my heads and cam. I had Brian at tpichips.com reburn the chip.

I put a rear tank in with an intank pump and ran steel lines to the engine and back. The tank I got from board member fuelcellguy.
My air intake ducting I got from Jags That Run. I also got my VSS from Jags That Run.

Re: Tune-port install
 

tpis products are good. the runners are located between the plenum(upper intake) and the base(lower manifold) thay look like bent tubing. 4 runners per side.

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Oh ok, I know what the runners are now. And thank you all for all of your inputs. So you just used the stock harness and modified it to work for your application?

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I am glad other people say they lack power... I know mine sure does! At least it looks pretty! I tried the painless harness and will NEVER go that route again.. THere was a problem with my harness and their customer service leaves a lot to be desired. Call the guys at Street and Performance.. They know their stuff and make some great products!

Re: Tune-port install
 

I used the stock harness. I removed the smog wiring, AC wiring, windshield washer pump wiring, fan wiring (I used my stock engine driven fan), and a couple other things I think. Once I had removed the extras the was MUCH easier to work with. Not only that, but I learned a ton about the TPI system simply by modifying the stock harness.

My TPI was very peppy down low, plenty of power, but it did quickly run out at the higher RPM's. The long runners do that. I wasn't building a race truck, so I liked having my power down low.

Re: Tune-port install
 

Awesome, thank you guys for all the input. Let me know if ya'll can think of anything else.

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You can also just run it in open loop w/o the computer. There's some on info on the net about it.

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:haha:please understand that "open loop" means that the engine runs on stored memory in the computer, when the engine comes up in temperature it enters "closed loop" meaning the computer adjusts fuel ratio and timing based on various readings from various sensors. the engine WILL NOT RUN without some sort of engine managment. ie: the computer

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eficonnection.com i got my harness from their.....OMG WAS THE CHEAPEST PRICE I FOUND AND THE BEST QUALITY.....guy uses all delphi connectors, great perfect harness i pick him before painless anyday. and he is cheaper than anyone...

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I checked out the site...it looks really good. Is that the harness that you are using? or do you know anyone that's using one of there systems?

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Do the LT1

For the time your going to spend wiring, you could do an LSX of some sort

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yes i am using that harness for my build. great quality everything brand new and delphi connections...thats what gm uses. great awesome guy to and offers alot ALOT of extra tips and info for your fuel injected engine...very educated. was a software programmer worked alot with the injection system and engine computers....another good point is the price.....plenty of bang for little buck give him a call just if you have questions he there to help not make a big sale....im across the country from him too harness comes in pretty good size box shipping was like 10 bucks or so

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Actually it gets it input from the MAP, the computer just fine tunes it.:devil:

I may have got the technicallies wrong. What I meant was there is an easier way. I would look for the Post on another Forum, but I don't remember what I was searching for when I stumbled across it.

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Cool, i'll give him a call today

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I think we are gonna save the LT1 for the 56 Belair lucky

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Agree!!! When I started my build LT1s still brought $4000.00 so I went the TPI route...

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What cost so much?

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At the time I started my 68 project LT1s were the hot motor... all the new Ls and LSX motors didn't exsist so LT1's brought all the money...

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TPI's make good truck motors because they produce a decent amount of torque. The L98 in my vette put down close to 300 ft lbs at the wheels when it was stock. If you're going to upgrade beyond the TPI, I would just skip the LTX stuff and straight to the LS series. A 6.0L from a late model truck would make an awesome truck motor. Plus, the aftermarket is packed with parts for the gen III/IV motors.

If you're looking to add some HP's to the TPI start with the intake. The stock one is very restrictive. There are some cheap alternatives though. For starters, check out www.lt1intake.com Or, check out the stealth ram and mini-ram intakes.

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Sweet sounds like a cool car (56 Belair)

Yes definitely skip the LTX and go to LSX

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If you have an LTI use the manifold off that on the TPI setup it will solve the poor flow problems at higher rpms and won't cost anything (or pick up an extra LT manifold at your local pick a part for $25). Just need to bore a hole for the dizzy and get a remote thermostat housing modify the bolt holes and your good to go.

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The TPI that i'm installing first doesn't need to be a power house...my dad just wants something that is unique and is dependable, with some power.

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That it will be. The 305 TPI won't win many races, but it will have good useable power and will get good fuel mileage.

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That's all he is looking for...now once I finish his and feel comfortable with installing the system, I'll start buying the parts to do mine. And it'll be a bit more extreme

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Grab a harness/computer from a JY. Should be cheap. If your wanting more power, that might be tough without a tear-down (different pistons/heads). Different runners might help a little though! You can coax 325hp out of a 305, but it might get pricey. But hey, not everyone and their brother will have one! I also agree that 3rd gen camaro site is very useful. Good luck!
Jay

Re: Tune-port install
 

Jy?