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Username Post: TPI update - PICTURES!        (Topic#95084)
OnAllFours 
Senior Member
Posts: 732
OnAllFours
Loc: Zionsville, PA, USA
Reg: 07-11-01
03-22-05 03:09 AM - Post#655032    

Well itís sitting in the parking lot this morning at work. Ran awesome! My rich idle cleared up when I set the timing and put a few miles on it for the computer to learn the characteristics of the motor. MAF systems really are quite amazing and adapt to change much better then the trucks factory speed density system. The difference in power is hard to explain, but it has much more low-end torque and is virtually stall-proof (getting used to new clutch) but pulls hard all the way up to 4000 RPM where I let off until itís got a few hundred miles on the new rod bearings. I snapped a few pictures before going in, attached is one of them. I'll grab the camcorder during lunch and take a short video of it idling or something.

You can see on the firewall where I added the MAF power and burn-off relays, and behind the junction cover I mounted the knock/ESC controller.

The air cleaner is a $25 Advance Auto part that fits on the MAF sensor perfectly, but it's only temporary until I come up with a more permanent solution (cal induction hood). Had I used the mechanical fan the air cleaner would have been more of a pain. I never had the right fan shroud for this truck, and the cost of the new electric fans was the same as a shroud....so. Right now I only have one fan connected. It's controlled by an adjustable fan control mounted on the pass fender and kicks on around 200F (needs to be set higher). The second fan will be controlled by the ECU and enabled when the engine reaches a set temperature (235 or so) or when the A/C is requested. I'll probably wire it so when the ECU requests the second fan, the primary fan comes on too so I have 2 fans running when the A/C is requested.

Hmm, what else. Oh, the EVAP can isnít connected yet. I need to figure out if it uses full or ported vacuum. I think itís supposed to use ported on the truck, and full in the Camaros, vacuum because my truck didnít come with a purge solenoid and the cars didÖat least I think they did. I only have one ported port, and itís used by the EGR valve so I still need to do more research on how I should hook it up.

The belt routing is a little different because I left the air pump off. The TBI belt fits perfectly so that worked out really nice.

Well I guess thatís about it for now! Enjoy the pic and let me know what you all think!
92 K1500 Z71 5.7 TPI
01 Olds Alero GL2
-
It takes 42 muscles in face to frown when somebody pisses you off, but only 4 muscles to extend your arm and b*tch slap that Mofo.


 
Low priced Genuine GM Auto Parts
chrisk1500 
Very Senior Member
Posts: 1817
chrisk1500
Loc: Saskatchewan, Canada
Reg: 10-30-04
Re: TPI update - PICTURES!
03-22-05 03:26 AM - Post#655033    
    In response to OnAllFours

nice
07.5 DMAX 2500 HD ext cab, 4x4, Edge EVO Race, 4" straight pipe, PPE tie rod sleeves, bushwhacker pocket flares, etc...

06 Escalade


 
jp233 
Senior Member
Posts: 1023
jp233
Loc: ATL, GA
Reg: 03-15-04
Re: TPI update - PICTURES!
03-22-05 05:20 AM - Post#655034    
    In response to chrisk1500

sweet !!!!!
'99 Ford F-250 SuperDuty 7.3L diesel
sold '97 Chevy Tahoe Z71
several Subarus
several bikes
not enough time


 
EdgesZ28 
Member
Posts: 103

Loc: South Carolina
Reg: 03-17-05
Re: TPI update - PICTURES!
03-22-05 05:41 AM - Post#655035    
    In response to chrisk1500

Interesting to see a MAF conversion. I converted my 94' Suburban to TPI, but used the speed-density system off my 91' GTA. Since I plan on still keeping some type of EFI, probably a Stealth Ram or someelse similar, on the GTA, using the computer and harness was not an option. I bought my ECM and harness from Street & Performance, but in hindsight, could have done better on Ebay.

I had the added issue of a 4L60E transmission and therefore had to retain the stock PCM to run the transmission and anti-lock brakes. So I have two computers, one for the TPI and the other for the transmission and other stock functions. There are three engine functions that need to be fed into the original PCM in order to operate the electronic transmission.

I retained the stock clutch fan, but used a set of Iroc/TA brackets. As far as your CCP solenoid, I have pictures on my website (see link below) on how I hooked it up, which was identical to the configuration in the GTA. My PCV valve is on the driver's side and hooks up to a nipple on the intake, between the runners. The top nipple on the pass side of the throttle body is for the breather connection to your pass valve cover. The lower nipple is for connection to the CCP solenoid. Again, you can see how I hooked this all up at my website. Looks like flipping your valve covers would permit installation as I did. But that may not be an issue.

I would like to get some good photos and a detailed written description on your swap and add it to my site. I think showing people how you converted to a MAF TPI system would be a good thing. Because it would make sense for people to buy a cheap donor car that they could get the TPI components, ECM, brackets, sensors, etc. from.

I agree with your logic in getting a new harness. It makes for a nice clean installation. I had issue with not having a VSS signal hooked up to the TPI ECM, and this would cause stalling and rough idle. Since my 94' signal at the tailshaft is 128,000 ppm, I had to get a Dakota Digital buffer box. Not having a VSS hooked up to the TPI ECM really affected the driveability of the system. It is my understanding that the heavy weight of the Suburban amplified the problem of not having a VSS hooked up.

Without a VSS, your EGR and CCP will not function properly. Is your transmission a 700R4, and if so, are you using the TPI ECM to control lockup functions? This again will require a functioning VSS.

One other thing. I know your pickup is not as heavy as my Suburban, but you should consider taking out some timing from the SA table. I'll bet if you scan your engine while driving, you will see a lot of knock retard, especially under part-heavy throttle. Reading and burning your own chips is not that difficult and can really improve on what is already running well. I have a page on "Tuning" where I detail how I did it with a speed-density system, but a MAF (#165 ECM)will be very similar. You should also set your base timing to match what the computer base timing is set at. It is better to have your timing as read on a light to match the computer is displaying.

You did a great job on the swap. I can help you share your experience if you wish. Let me know, Ed
My 1981 Camaro Z28 TPI Conversion - 1994 Suburban


 
OnAllFours 
Senior Member
Posts: 732
OnAllFours
Loc: Zionsville, PA, USA
Reg: 07-11-01
Re: TPI update - PICTURES!
03-22-05 06:04 AM - Post#655036    
    In response to EdgesZ28

Hey Ed! I saw your Burb on S&P when I was shopping around for harness work!

I have a 5-speed so ECM control of the tranny is not an issue for me. I'm pretty sure the early 90s speed density LT1 ECMs will control the 4L60E in your burb...you may want to look into that if you ever want to ditch the stock ECM.

I do all my own chip work already. I had a big cam in my TBI motor so I had to make a new chip to adjust for the lower vacuum and different timing needed to get it to run right. After getting the BLMs to hang around 128 at all RPMs and loads, it ran really sweet. That got me started with the chip work and it got very easy for me, from there. I'm currently running a hack of the $6E APYP (89 5.0 manual trans) bin with the 5.7 ARAP (89 5.7 auto) fuel and timing tables copied into it for better manual trans drivability. Basically itís purpose was just as a starting point to get it running and drivable. Now that the truck is drivable, I plan to do plenty of data logging and see what's going on and where I need adjustment. I'm running a pretty radical timing table from the ARAP chip, but I've been told it's not too bad and should be pretty close for my truck. I can't hear any knock, but that's not to say the ECM isn't seeing any.

As for the VSS, I'm not sure if it's working or not. I have a hunch it isn't because the motor isn't "hanging" at it's RPMs between shifting gears like it should. I'm still waiting for an answer from Matt Howell (he did my harness rework) to see if the 165 ECM will read my VSS buffer correctly. He said he didn't touch the VSS circuit in the harness...but I'm not sure if the 165 gets it's VSS input from the same pin as the 747 I had in the truck before. So that's what I'm waiting to hear from him. I have the service manuals in the truck, but I haven't had a change to go look yet.

Yes, I see I put my valve covers on backwards. I'm stubborn and wanted the oil fill to be on the same side as the dip stickÖbut it looks like that may not work out. Maybe I can switch the grommets aroundÖ

Thanks for the tip, Iíll check out your site and see if I canít square away my CCP hookup.

EDIT: By the way I didn't get a new harness, I sent the existing truck harness to Howell Engine Developments and they reworked it to support the TPI MAF system. Because it was the factory truck harness, it fit right back in and the TPI ECM plugged right where the TBI ECM used to be. Everything is a perfect fit and looks completely stock. The check engine light, ALDL connector...everything work just as they did before.

Dieter
92 K1500 Z71 5.7 TPI
01 Olds Alero GL2
-
It takes 42 muscles in face to frown when somebody pisses you off, but only 4 muscles to extend your arm and b*tch slap that Mofo.


 
John 
Dedicated Enthusiast
Posts: 7196
John
Age: 45
Loc: Montgomery, AL
Reg: 01-15-02
Re: TPI update - PICTURES!
03-22-05 02:59 PM - Post#655037    
    In response to OnAllFours

Take off the radiator support and fog it semi-gloss black, then top off the brake fluid and it'll look like new!

J/K, great job! I don't think it'll make any real power above 4,000 rpm once it's fully broken in. I had an older 305 TPI car once, but I think the tach went orange at 4,500 and red at 5,000 rpm. You got the 5.7 TPI, right? It should pull better but the TPI's weren't screamers. Which makes it all the better a truck engine. Good job.
1979 2wd K5 Blazer, 350/TH350
1985 4x4 M1009 K5 Blazer, 6.2/TH400


 
OnAllFours 
Senior Member
Posts: 732
OnAllFours
Loc: Zionsville, PA, USA
Reg: 07-11-01
Re: TPI update - PICTURES!
03-22-05 03:27 PM - Post#655038    
    In response to John

Yup, it's a 350.

I dono, my buddy's 89 Iroc (5.7) pulls pretty hard all the way to 5000 RPM or so, and will continue to pull till 6000 but not nearly as hard. Headers and free flowing exhaust make a HUGE difference to these engines.

Indeed, it is a great truck engine. It makes a HUGE difference. Now if I ported the intake and runners, put an LT1 cam in, AFPR, 24lb injectors.....just kidding. I really like it the way it is.

My brake fluid resovour leaks at the little seals in the bottom of the tank. Nobody sells just the tank WITH the seals and I don't want to change the whole master cylinder just for that. For some reason my breaks feel great and not nearly as squishy as everyone else's K1500 that I've driven so I'm afraid to change much.
92 K1500 Z71 5.7 TPI
01 Olds Alero GL2
-
It takes 42 muscles in face to frown when somebody pisses you off, but only 4 muscles to extend your arm and b*tch slap that Mofo.


 
OnAllFours 
Senior Member
Posts: 732
OnAllFours
Loc: Zionsville, PA, USA
Reg: 07-11-01
Re: TPI update - PICTURES!
03-22-05 03:29 PM - Post#655039    
    In response to OnAllFours

Just to let everyone know I just got done cutting a short 2 min video of the engine running and what it looks/sounds like. It's a 40 meg MPEG but I'm stuck with 1-way cable modem out here in the woods so I'll have to upload/post it tomorrow morning when I get to work.
92 K1500 Z71 5.7 TPI
01 Olds Alero GL2
-
It takes 42 muscles in face to frown when somebody pisses you off, but only 4 muscles to extend your arm and b*tch slap that Mofo.


 
someotherguy 
Moderator
Posts: 25857
someotherguy
Age: 44
Loc: Texas
Reg: 08-01-03
Re: TPI update - PICTURES!
03-22-05 05:42 PM - Post#655040    
    In response to John

Quote:

Take off the radiator support and fog it semi-gloss black, then top off the brake fluid and it'll look like new!



Have you been watching what goes on in my shop??! If I'm without at least a can or two of Rustoleum Satin Black; I'm in big trouble..

(No kidding; I just repainted the top of the core support on the '92 a while back - it looked awful before!)

Richard
94 C2500LD / 97 Suburban LS1 / 06 300C SRT8
Check out my truck shop projects


 
John 
Dedicated Enthusiast
Posts: 7196
John
Age: 45
Loc: Montgomery, AL
Reg: 01-15-02
Re: TPI update - PICTURES!
03-22-05 06:34 PM - Post#655041    
    In response to someotherguy

Quote:

I just repainted the top of the core support on the '92 a while back - it looked awful before!




BTDT.

Wish I knew how many cans of spray paint were in my "shop". I'm short a can of Chevy Rallye Silver right now...
1979 2wd K5 Blazer, 350/TH350
1985 4x4 M1009 K5 Blazer, 6.2/TH400


 
chevy385 
Member
Posts: 20
chevy385
Loc: Bechtelsville, PA
Reg: 12-07-04
Re: TPI update - PICTURES!
03-22-05 07:39 PM - Post#655042    
    In response to OnAllFours

Congrats on the TPI swap! I know it runs like a champ, I saw it! I wanna see it lay rubber in my driveway. HA HA You gotta send me the video. And, yes, my IROC did pull kinda hard up to about 5K before I yanked the engine out...Anything more than 5K was a joke, but 2 blown head gaskets and bad plugs/wires tend to screw up the works a little. All in good time...
1989 IROC-Z TPI 350(+.030=355) 700R4
1986 IROC-Z TPI 305(RIP) 700R4
1977 C-10 Stepside SB 454 TH350(w/B&M kit)
1993 K1500 Suburban TBI 350 4L60E(w/TransGo kit)
1990 Escort 1.9 TBI ATX(beater)
2002 Cavalier Sport Coupe Ecotech 2.2 Getrag(wife's)


 
OnAllFours 
Senior Member
Posts: 732
OnAllFours
Loc: Zionsville, PA, USA
Reg: 07-11-01
Re: TPI update - PICTURES!
03-23-05 01:29 AM - Post#655043    
    In response to chevy385

chevy385: Actually, I was talking about your blue '89. The one you shoulda kept!
92 K1500 Z71 5.7 TPI
01 Olds Alero GL2
-
It takes 42 muscles in face to frown when somebody pisses you off, but only 4 muscles to extend your arm and b*tch slap that Mofo.


 
OnAllFours 
Senior Member
Posts: 732
OnAllFours
Loc: Zionsville, PA, USA
Reg: 07-11-01
Re: TPI update - PICTURES!
03-23-05 03:17 AM - Post#655044    
    In response to OnAllFours

I started a new topic and posted a link the video. Check it out!
92 K1500 Z71 5.7 TPI
01 Olds Alero GL2
-
It takes 42 muscles in face to frown when somebody pisses you off, but only 4 muscles to extend your arm and b*tch slap that Mofo.


 
wymjym 
Frequent Contributor
Posts: 1322
wymjym
Loc: near Austin,Tx
Reg: 04-12-02
Re: TPI update - PICTURES!
03-23-05 07:58 AM - Post#655045    
    In response to OnAllFours

numero uno...congratulations...good job!!!
I remember reading about this engine in vettes and in order to get the most out of it you would shift @4200 (assuming that the engine would hit 44~45 before the shift was complete). It would pull higher but all the real action was over by 4500. I think this is a great engine for the truck, I have tpi envy.

 
chevy385 
Member
Posts: 20
chevy385
Loc: Bechtelsville, PA
Reg: 12-07-04
Re: TPI update - PICTURES!
03-23-05 06:22 PM - Post#655046    
    In response to OnAllFours

Quote:

chevy385: Actually, I was talking about your blue '89. The one you shoulda kept!


Believe me, I know, feel free to stop rubbing it in any time!
1989 IROC-Z TPI 350(+.030=355) 700R4
1986 IROC-Z TPI 305(RIP) 700R4
1977 C-10 Stepside SB 454 TH350(w/B&M kit)
1993 K1500 Suburban TBI 350 4L60E(w/TransGo kit)
1990 Escort 1.9 TBI ATX(beater)
2002 Cavalier Sport Coupe Ecotech 2.2 Getrag(wife's)


 
Low priced Genuine GM Auto Parts
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