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04-11-2008
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#1 |
Join Date: Aug 2005
Location: Pineridge
Posts: 341
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Porting
How much of a difference does top end porting really make? Can you feel it or will it?
Last edited by Bell Curve; 04-11-2008 at 01:28 PM. |
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04-11-2008
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#2 |
  
Join Date: Aug 2005
Location: Northridge, CA
Posts: 1,461
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Re: P & IH & TB porting
I had to go to a less restrictive exhaust to feel the benefit of P & P the IH and Plenum. I didn't do the heads.
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04-11-2008
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#3 | |
  
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: Porting
Quote:
Is it worth doing while you there? Yes especailly when you getting some P&C work done at the same time. Also the work cannot be seen and does not affect the value of the ZR-1!!! It just makes sense. Just my thoughts and Jeffvette and locobob do some great work. And stand behind that work (voice of experience) Id rather have someone like them (experts) do the work as im not a brave as Dominic S but he can tell you how much his labor of love cost him time and equipment wise to do his self porting. 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; 04-11-2008 at 05:57 PM. |
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04-11-2008
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#4 |
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Join Date: Oct 2007
Location: lone pine and mammoth lakes ca.
Posts: 544
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Re: P & IH & TB porting
corey henderson of HPT. did my car .when i brought it into him he ran it on the dyno car made 373rwhp after the porting and him retunning the prom it made 409.9. tq also went from 355 to 373.3 his ph is 210 867 6286. he is very fair price wise and is a well known zr1 builder . loco bob also does excellent work as does mark haibeck .i would choose one of those 3 if it were me.
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04-11-2008
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#5 |
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Join Date: Aug 2005
Location: Northridge, CA
Posts: 1,461
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Re: P & IH & TB porting
Oops, GC is correct. A Marc Haibeck chip for me helped maximize the other mods.
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04-11-2008
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#6 |
Join Date: Aug 2005
Location: Memphis TN
Posts: 201
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Re: P & IH & TB porting
I feel it, especially since it has warmed up and when I run the AC...it still feels strong.
B&B Haibeck Chip PORTED K&N |
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04-11-2008
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#7 |
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Join Date: Jul 2005
Location: Auburn, Washington
Posts: 586
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Re: P & IH & TB porting
You may notice some seat-of-the-pants difference, especially so in the 90-92 cars. Port work on the 405 horse later models doesn't make as much of a difference as it does in the 375 horse earlier models. The great equalizer in both is port work to the plenum and injector housings coupled with a set of long tube headers and a tune.
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Nick ZR-1 Net Registry Founding Member #32 - lapsed... |
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04-12-2008
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#8 |
Join Date: May 2005
Location: Leesburg, VA
Posts: 2,713
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Re: P & IH & TB porting
I could easily feel it on my car. Marc H ported it and included a chip. It was noticeable the improvement, as well as how the power didn't drop at higher rpm. Stock it seemed to drop off around 6,500 or so, resulting in a natural inclination to shift. With the top end ported, I hit the limiter a lot until I got used to it.
I think having a ported top end is what made my exhaust change so noticeable too. I gained about 22whp on a Superflow just from a cat-back change. I suspect the number was that high because the exhaust was choking the porting a bit.
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Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img] Last edited by Aurora40; 04-12-2008 at 10:44 AM. |
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04-12-2008
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#9 |
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Join Date: Sep 2005
Location: Washington
Posts: 955
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Re: P & IH & TB porting
On my 92 Z , went from 325rwhp to 396rwhp. 100% stock to ported with headers and corsa (no head work). Night and Day difference. The power never dropped, it was still pulling at the rpm limiter. I think every Z should have this done (top end port work). They are so far off stock, and it makes the motor just pull to redline.
DO IT 
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04-12-2008
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#10 |
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Join Date: Aug 2005
Location: San Fernando Valley, CA.
Posts: 896
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Re: P & IH & TB porting
Getting more air in is good as long as it can get out. All adds up at the end of the day.
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1990 ZR1, 142,000 miles-Black on black 4.09's Haibeck chip, 3"exh, K&N, meth inj. |
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