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#1 |
![]() Join Date: Dec 2004
Location: Jacksonville, FL USA
Posts: 4,609
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Hi guys. I need the brain trust for some advice. The title says it all. What say you about buying a already ported plenum & a set of I/H's?
My reason for asking is that I can no longer even detail my car in the garage space I rent, so doing any more mid-nite auto repair work is out. Anything I do in the future will have to be plug & play projects that I can do outside in very little time. Thanks in advance for any wisdom the porting mavens would like to throw my way. The stuff is for sale in that place that shall remain nameless, the parts are from a 91 Z & the work was done by a gentleman named Greg Van Deventer and the price is $1250. TIA ![]() ![]() Tom
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1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member |
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#2 |
![]() ![]() Join Date: May 2007
Location: Peoria, AZ
Posts: 9,120
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Go for it Tom you can sell what you have on the car and recoup half your costs. A word to the wise however, make sure the replacement plenum has ALL the tube connectors so you dont have to take any off your plenum when it comes time to sell. I bought a spare plenum to expedite my down time and it was missing a couple of tubes that Jeffvette had to scrounge around for. The porting and polishing job is a very labor intensive process as you well know so this sounds like the best least amount of down time option for you. You should see about 15 HP inporvement if you match port the heads as well. About 30 HP if the package includes a set of long tubes. Keep in mind you will need to get your prom retunned due to these mods. Have fun. GC
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director ![]() 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V Last edited by GOLDCYLON; 06-04-2009 at 10:10 AM. |
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#3 | |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,685
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I know which parts you're looking at. When I did my P&P, I started out with parts that had been ported by GVD. I re-did them not because they were poorly ported but because LT-5 mods have evolved since the time mine had been done. The ports were only 34-35mm. I opened them up to about 36-37mm. And as GC stated, I also port matched the heads. You'll get an increase in hp with the setup your contemplating but to maximize it, you'll still need to do some work IMO. And then of course there's the tuning. I don't believe anything on the LT-5 is "plug n play". ![]() |
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#4 | |
![]() Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,667
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'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage |
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#5 |
![]() Join Date: Dec 2004
Location: Jacksonville, FL USA
Posts: 4,609
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I was hoping that I would get lucky and you guys would chime in, thanks XFire & Pete & GC.
![]() Thank you guys(Pete & ZFire) also for reminding me that there is no plug & play for our motors. I should have been more perceptive when reading your threads & posts. ![]() Okay let me see if I "get it". My thoughts were to buy the stuff because it would suit my lack of work space. That strategy would allow me to have those parts to send to a specialist to have the newer thoughts on porting done while I keep using my car. Or I could just put them on my car and send my stuff out to get done. Either way I don't need garage space to do a plenum & I/H swap. I need a chip rewrite to account for the porting even if I don't get my headers put on at the same time I use the ported parts, right? The head work is just a dream right now for me, as was the porting of the intake.....I've been looking to cop an intake system from an early car so I could have that stuff ported. I saw this stuff and thought...."it's Christmas!" ![]() grass hopper says Thanks! ![]()
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1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member |
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#6 |
![]() Join Date: Jan 2004
Location: Portland, OR
Posts: 1,047
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Keep in mind that 90 and 91 intake parts are not identical, a few tweaks will be required to make the swap work.
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Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 |
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#7 | |
![]() Join Date: Dec 2004
Location: Jacksonville, FL USA
Posts: 4,609
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1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member |
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