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TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.

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Old 07-23-2003, 10:47 PM   #1
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89 Iroc Z's Avatar
 
Join Date: Aug 2001
Location: Nothern VA
Posts: 2,125
Car: 1989 Iroc-Z
Engine: 350, ZZ4 equivalent
Transmission: Pro-Built Road Race 700R4
Axle/Gears: 3.23 Dana 44

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Do you guys think this will actually have any benefit?

I saw this http://www.top-downsolutions.com/pro...products_id=97 for sale today on Top-Down solutions website. It seems to me that this really wouldn’t do much if anything. What do you guys think?
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1989 IROC-Z 350, Blue, T-Tops
Blue 1989 IROC-Z T-tops
Engine: 350 ZZ4 Equivalent (ZZ4 Heads, cam, pistons, and rods) / Accel TPI Baseplate / TPIS Large Tube Runners / DIY chip / and a bunch of other odds and ends
Drivetrain: Pro-Built Road Race 700R4 Tranny / Vigilante TC, 2600 Stall / LS1 Driveshaft / DANA 44 Rear w\ Moser Axles, 3.23 Gears, Trac-Loc LSD
Chassis & Suspension: Spohn Sub-Frame connectors / C4-HD Brakes / Polished 16" IROC Rims

Website: My Website, Brake Upgrade How-to, etc ~Luke
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Old 07-24-2003, 01:42 AM   #2
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I don't know of many TPIs that 'bog' during hard acceleration so I think that is worthless.
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My 89 Iroc 383, AFR 190s, SuperRam, ZZ9 cam, bolt-ons
12.707 @ 109.395 MPH
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Old 07-24-2003, 02:01 AM   #3
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Car: 91 Z28
Engine: Forged 383
Transmission: Pro-built 700R4

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Bog, what the heck is that? Isn't that the name they called the swamp in the 80's movie Labyrinth with Jennifer Connelly? :sillylol:

Really, this part sounds like a load of bs. Maybe it's a band-aid for a weak fuel pump or something?? I would think that the tornado would be a better value for the money.
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2002 SOM ws6 M6, the 91 never was ressurected after the fire...


Old cars:
91 Z w/383 , all forged bottom end, miniram, TPIS ZZ-X cam, Ported AFR 210's, Pro-built trans, Vig 3200 stall, Hooker LT's, drag susp., 17x9 ROH Snypers, and quite a bit more. 375 rwhp 375 rwtq.

89 Iroc, SuperRam, 219 cam, AFR 190's, sold to the old man, now has 406, runs 11's.
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Old 07-24-2003, 08:27 AM   #4
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Join Date: Dec 1999
Location: Hacienda Heights, CA
Posts: 4,991
Car: 90 RS 'Vert, 88 IROC-Z, 88 Firebird
Engine: 305 ci tbi, 305 ci tpi, 350 ci tpi
Transmission: WC-T5, WC-T5, 700R4
Axle/Gears: 3.45, 3.27, 3.27

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I can understand that you TPI guys are confused. Perhaps if you guys visited the TBI forum or did a search in the TBI forum you'd understand the vacuum-delay valve, which is used in conjuction with the vacuum-adjustable fuel pressure regulator. Please re-read the description. I've revised the description to help end any confusion as to the intended application. I discovered that the VaFPR would flood the engine dumping too much fuel when the accellerator was floored. Many TGO Members (including myself) have already installed vacuum-delay valves in congunction with the GM 17113186 VaFPR with good results. If you aren't using a GM 17113186 VaFPR (which is used only on GM TBI engines) then don't order it.

Thanks, Lon
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88 Firebird Formula "racer"
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Last edited by lonsal; 07-24-2003 at 09:09 AM.
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Old 07-24-2003, 05:04 PM   #5
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Car: 91 Z28
Engine: Forged 383
Transmission: Pro-built 700R4

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Thanks for the clarification. That does seem interesting.
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2002 SOM ws6 M6, the 91 never was ressurected after the fire...


Old cars:
91 Z w/383 , all forged bottom end, miniram, TPIS ZZ-X cam, Ported AFR 210's, Pro-built trans, Vig 3200 stall, Hooker LT's, drag susp., 17x9 ROH Snypers, and quite a bit more. 375 rwhp 375 rwtq.

89 Iroc, SuperRam, 219 cam, AFR 190's, sold to the old man, now has 406, runs 11's.
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Old 07-24-2003, 05:27 PM   #6
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Join Date: Dec 1999
Location: Hacienda Heights, CA
Posts: 4,991
Car: 90 RS 'Vert, 88 IROC-Z, 88 Firebird
Engine: 305 ci tbi, 305 ci tpi, 350 ci tpi
Transmission: WC-T5, WC-T5, 700R4
Axle/Gears: 3.45, 3.27, 3.27

Classifieds Rating: (1)
Thanks for letting me know the description needed clarification. I was taken aback initially with the comparison to that fine product the "Tornado". :sillylol:

Lon
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Old 07-24-2003, 08:40 PM   #7
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He has a TPI car though therefore this is worthless to him. It may help TBI cars but that's not what he has and that's not the Forum he posted it in
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Old 07-25-2003, 01:07 AM   #8
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Join Date: Nov 2000
Location: Indpls IN US
Posts: 812
Car: 91 Z28
Engine: Forged 383
Transmission: Pro-built 700R4

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Thanks for pointing that out, Danny. You're right, I was mistaking the tbi for tpi, maybe I need glasses...
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2002 SOM ws6 M6, the 91 never was ressurected after the fire...


Old cars:
91 Z w/383 , all forged bottom end, miniram, TPIS ZZ-X cam, Ported AFR 210's, Pro-built trans, Vig 3200 stall, Hooker LT's, drag susp., 17x9 ROH Snypers, and quite a bit more. 375 rwhp 375 rwtq.

89 Iroc, SuperRam, 219 cam, AFR 190's, sold to the old man, now has 406, runs 11's.
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Old 07-25-2003, 01:07 AM
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