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Old 11-21-2008, 02:22 AM   #26
danman987123
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Re: Tune-port install

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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Old 11-21-2008, 01:04 PM   #27
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Re: Tune-port install

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Originally Posted by vasquezmrysvll View Post

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

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.

Last edited by airdale94; 11-21-2008 at 01:07 PM. Reason: add
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Old 11-21-2008, 01:08 PM   #28
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Re: Tune-port install

Cool, i'll give him a call today
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Old 11-21-2008, 01:09 PM   #29
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Re: Tune-port install

I think we are gonna save the LT1 for the 56 Belair lucky
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Old 11-21-2008, 03:15 PM   #30
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Re: Tune-port install

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Originally Posted by LuckyHenriksen View Post
Do the LT1

For the time your going to spend wiring, you could do an LSX of some sort
Agree!!! When I started my build LT1s still brought $4000.00 so I went the TPI route...
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Old 11-21-2008, 04:27 PM   #31
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Re: Tune-port install

What cost so much?
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Old 11-21-2008, 04:31 PM   #32
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Re: Tune-port install

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What cost so much?
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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Old 11-21-2008, 05:14 PM   #33
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Re: Tune-port install

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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Old 11-21-2008, 05:44 PM   #34
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Re: Tune-port install

Sweet sounds like a cool car (56 Belair)

Yes definitely skip the LTX and go to LSX
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Old 11-21-2008, 05:58 PM   #35
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Re: Tune-port install

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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Old 11-21-2008, 06:10 PM   #36
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Re: Tune-port install

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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Old 11-21-2008, 06:36 PM   #37
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Re: Tune-port install

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Originally Posted by smoky02 View Post
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.
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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Old 11-21-2008, 06:40 PM   #38
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Re: Tune-port install

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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Old 11-22-2008, 01:26 AM   #39
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Re: Tune-port install

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!
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Old 11-22-2008, 02:05 AM   #40
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Re: Tune-port install

Jy?
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Old 11-23-2008, 12:06 AM   #41
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Re: Tune-port install

Sorry, junk yard.
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Old 11-23-2008, 12:22 AM   #42
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Re: Tune-port install

Ok cool...thanks
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Old 01-21-2009, 10:43 PM   #43
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Re: Tune-port install

any up dates on this ?
i am going to be doing a 350 vortec tune port in a 91 2wd 4 door blazer
what did you use for manifolds?
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Old 01-22-2009, 06:22 PM   #44
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Re: Tune-port install

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Originally Posted by wannabelow View Post
any up dates on this ?
i am going to be doing a 350 vortec tune port in a 91 2wd 4 door blazer
what did you use for manifolds?
What manifolds are you talking about? Intake or exhaust? For this motor, I used the Scoggin-Dickey conversion intake for a TPI to a set of vortec heads, with the Edelbrock large runner tubes. The exhaust will be a set of edelbrock shorty headers and the rest of the install will use the Camaro bracketry for spacing around the air intake fittings.

This engine also has 1.6 to 1 roller rocker arms and 23 LB injectors for a total of 350 HP from the engine.
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Old 01-22-2009, 07:03 PM   #45
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Re: Tune-port install

I have had this motor running for close 20 years in my 71. It has never let me down except for fuel pumps but that has been solved with the baffeled tank.
I installed this motor back in 89 and Street & Performance was the only company doing this stuff at the time. I got a V-6 Ferrio computer with S&P wiring harness.
My factory harness is all there nothing has been removed. All the gauges are as were form factory. The S&P harness was all plug and play with a Hot,ground and fuel relay wire and the rest plug to the motor. I wish there would have been all these choices back when I was doing mine but hey it was fun.





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Old 01-22-2009, 09:42 PM   #46
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Re: Tune-port install

exhaust manifolds

will the camaro ones bolt to the vortec heads?

what inline fuel pump did you guys use?

Last edited by wannabelow; 01-22-2009 at 09:42 PM.
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Old 01-22-2009, 09:43 PM   #47
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Re: Tune-port install

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Originally Posted by piecesparts View Post
What manifolds are you talking about? Intake or exhaust? For this motor, I used the Scoggin-Dickey conversion intake for a TPI to a set of vortec heads, with the Edelbrock large runner tubes. The exhaust will be a set of edelbrock shorty headers and the rest of the install will use the Camaro bracketry for spacing around the air intake fittings.

This engine also has 1.6 to 1 roller rocker arms and 23 LB injectors for a total of 350 HP from the engine.


what valve covers are those?
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Old 01-23-2009, 12:13 AM   #48
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Re: Tune-port install

The valve covers on that engine are the original titanium colored covers from the 90 Vette that it came out of. They had some stains on them from the brake fluid that spilled onto them when it rolled over, so I sprayed them with a silver color until it came time to do something else. I have a set of chrome covers in storage for it.

The factory GM exhaust components for the cars and trucks should fit the heads. That side is basically the same as a standard GM 350.
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Old 01-23-2009, 12:21 AM   #49
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Re: Tune-port install

thanks

i am really really bad for guessing hp

what would you guess be for a stock 98 350 vortec with a tune port out out of a 88 firebird that has been ported?
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Old 01-23-2009, 05:34 PM   #50
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Re: Tune-port install

If you do some engine updates and the computer is bumped up for performance, as well as bigger injectors. you could get to 325 or 350 HP easily. However, the stock engine, with a standard TPI you will get the 265 HP range. Example, this vortec motor from PACE Perf. with a multiport injection and a vortec motor.

http://paceperformance.com/index.asp...D&ProdID=85273

Last edited by piecesparts; 01-23-2009 at 05:34 PM.
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