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#1 |
![]() Join Date: Mar 2019
Location: Austin, TX
Posts: 45
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I recently dropped off my 93 ZR-1 at Henderson Performance to resolve a low speed driveability issue and have a Core short throw shifter installed.
After some initial runs on the dyno, Corey installed a fresh set of Delco plug wires and upgraded the secondary fuel pump. Thanks to Corey's tune, the driveability issue is now gone! As an added bonus, the car ended up pulling 559hp and 485 ft/lbs to the wheels
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93 ZR-1 Red/Red 415ci Jeal cams/headers, hf cats, B&B Wilwood brakes, DRM coilovers 94 ZR-1 Red/Blk 368ci SW headers, hf cats, Corsa 16 GT-R Blk/Blk Stg1 3.8 BL1200X, Shep1k, Motec 1250 whp on pump e85 |
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#2 |
![]() Join Date: Jul 2016
Location: Greater St. Louis
Posts: 487
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#3 |
![]() Join Date: Nov 2007
Location: Sunshine State
Posts: 1,071
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559/485= Dayum Sweet!
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[B]1990 #2815[/B] [COLOR="Red"][B]Red/Red[/B][/COLOR] Ported Plenum & IH (by Pete) Haibeck Chip Rebuilt FPR (by Phil) FIC Injectors Watson LT Headers 3" Stainless Works exhaust Lingenfelter Open Air Lid Bill B Built Transmission Shifter & C Beam Plates [FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT] [FONT=Impact][COLOR=#ff0000]Red/[COLOR=silver]Gray[/COLOR][/COLOR][/FONT] [B]SOLD[/B] |
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#4 |
![]() Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Nice...! We have had a recent report that Cory doesn't work on ZR-1's anymore. He turned down working on a members car, apparently stating he didn't do those anymore. Is he only working on his own creations and not run of the mill Z's? It would be good if we could have someone confirm this one way or another.
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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#5 | |
![]() Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,680
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Those are power #'s ![]() Can you tell us at what RPM your peak HP/Torque were. Cams specs? Pete
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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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#6 |
![]() Join Date: Mar 2019
Location: Austin, TX
Posts: 45
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Thanks guys. Some more info on the car-I bought it earlier this year from the original owner, it was on consignment at Blackdog Performance Cars. The engine was built by Jim Milstead in the early 2000's and the car was barely driven after that. The low speed driveability was caused by a bit too much timing down (under 2500 rpm or so) which caused the ECM to remove timing. Surprisingly, the secondary throttles are still in place.
Hans, as far as I know, Corey is still doing tuning and performance upgrades on ZR-1s. The member that you may be referring to stated that Henderson Performance no longer does mechanical repairs. It's possible that they are too busy with their current work load but that is just speculation on my part.
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93 ZR-1 Red/Red 415ci Jeal cams/headers, hf cats, B&B Wilwood brakes, DRM coilovers 94 ZR-1 Red/Blk 368ci SW headers, hf cats, Corsa 16 GT-R Blk/Blk Stg1 3.8 BL1200X, Shep1k, Motec 1250 whp on pump e85 |
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#7 | |
![]() Join Date: Mar 2019
Location: Austin, TX
Posts: 45
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Don't know the cam specs, I just know that they are Jeal cams. Marc H has a dyno graph on his site of another 415 with Jeal cams and similar output. He lists the specs as: 238 degrees of duration @ .050" lift and .430" total lift. |
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#8 | |
![]() Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,680
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That RPM sounds right. Jeal cam specs seem to be right also, last time i spec'd Jeal cams. Pete
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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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#9 | |
![]() Join Date: Jun 2005
Location: CenCoast California
Posts: 899
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Works out to about 680 at the flywheel. Pretty impressive from 6.8L.
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Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878 |
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#10 |
![]() Join Date: Nov 2014
Location: Brooklyn ny
Posts: 1,045
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I remember that car being advertised...From what I remember the asking price seemed very reasonable for the work that car had on it....
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