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10-01-2013
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#1 |
 Join Date: Mar 2013
Location: Roswell, GA
Posts: 234
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Steel IH Gaskets & Primary Port is 38mm
Update: Finally got injector housings off and discovered why I had an oil leak at the IH to head gasket, it appears a steel gasket was used...see pictures. Not sure why? I also discovered that the IH primary ports have been opened up to just shy of 38mm. The steel gaskets are also 38mm but the head was not matched to the gasket or IH. Question: why was a steel gasket used and should I proceed with opening up the primary port on the heads to 38mm to match the IH? I will have to trim some material off the new gasket as well.
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1995 ZR1 #159 Ported,Corsa,4.10 Rear, Dual Disc RAM Clutch, Alum Flywheel, Haibeck Chip, ZFDoc Plates, Relocated Battery 400 rwhp 1992 ZR1 #280 Ported, Locked Secondary's, Flowmaster Exhaust, Haibeck Chip, 375rwhp 1996 Collectors LT4 (Stock) 1972 Convertible 434 Small Block 572 rwhp |
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10-01-2013
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#2 |
  
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,120
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Re: Steel IH Gaskets & Primary Port is 38mm
Steel? Never seen those before. Haibeck sells a steel Cometic Headgasket like the LSX motors use but ive never seen steel IH gaskets before. 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 |
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10-01-2013
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#3 | |
 Join Date: Oct 2004
Posts: 1,884
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Re: Steel IH Gaskets & Primary Port is 38mm
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10-01-2013
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#4 |
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Join Date: Mar 2013
Location: Roswell, GA
Posts: 234
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Re: Steel IH Gaskets & Primary Port is 38mm
I just pulled one off the head, i believe it is aluminum, it looked like stainless but it is soft. Aluminum would make more sense.
The gasket also appears to be coated with a clear material..... permatex shellac? Either way, this is a relatively low clamp pressure application, unless the surfaces are perfect, using any type of metal gasket is risky as my leaks demonstrate. I think I will just match the head to Jerry's gasket instead of the IH which is a tad bigger.
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1995 ZR1 #159 Ported,Corsa,4.10 Rear, Dual Disc RAM Clutch, Alum Flywheel, Haibeck Chip, ZFDoc Plates, Relocated Battery 400 rwhp 1992 ZR1 #280 Ported, Locked Secondary's, Flowmaster Exhaust, Haibeck Chip, 375rwhp 1996 Collectors LT4 (Stock) 1972 Convertible 434 Small Block 572 rwhp |
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10-01-2013
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#5 |
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Join Date: Mar 2013
Location: Roswell, GA
Posts: 234
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Re: Steel IH Gaskets & Primary Port is 38mm
The gaskets have a "ring" and weight of steel however. Could be a soft stainless?
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1995 ZR1 #159 Ported,Corsa,4.10 Rear, Dual Disc RAM Clutch, Alum Flywheel, Haibeck Chip, ZFDoc Plates, Relocated Battery 400 rwhp 1992 ZR1 #280 Ported, Locked Secondary's, Flowmaster Exhaust, Haibeck Chip, 375rwhp 1996 Collectors LT4 (Stock) 1972 Convertible 434 Small Block 572 rwhp |
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10-01-2013
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#6 | |
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Join Date: May 2007
Location: Peoria, AZ
Posts: 9,120
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Re: Steel IH Gaskets & Primary Port is 38mm
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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 |
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10-01-2013
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#7 |
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Join Date: Mar 2013
Location: Roswell, GA
Posts: 234
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Re: Steel IH Gaskets & Primary Port is 38mm
Low carbon stainless wont be magnetic either... not a reliable test. I guess material doesn't mater in the long run, I was just curious as to why someone would chose this over a conventional gasket...heat transfer? Warmer IH better?
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1995 ZR1 #159 Ported,Corsa,4.10 Rear, Dual Disc RAM Clutch, Alum Flywheel, Haibeck Chip, ZFDoc Plates, Relocated Battery 400 rwhp 1992 ZR1 #280 Ported, Locked Secondary's, Flowmaster Exhaust, Haibeck Chip, 375rwhp 1996 Collectors LT4 (Stock) 1972 Convertible 434 Small Block 572 rwhp |
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10-01-2013
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#8 | |
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Join Date: May 2007
Location: Peoria, AZ
Posts: 9,120
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Re: Steel IH Gaskets & Primary Port is 38mm
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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; 10-01-2013 at 12:05 PM. |
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10-01-2013
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#9 | |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,466
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Re: Steel IH Gaskets & Primary Port is 38mm
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 BUT! You ARE going to have some pulse reversion, and laminar flow will actually be less than if the IH's were the same size as the opening into the heads!** At the very least, you might want to spend a little time and open up the runner cross-section to match the IH and taper down into the heads at least a couple cm, if you're keeping them (danged secondaries)! It will will be worth the effort! Flyin Ryan does some pretty good runner engineering. He mentioned to me that 4% change in diameter for length is about as much as you can get w/o running into (restriction). And, since then, I've run across some reinforcement for that recommendation. Just sayin... After all, it is well within the realm of possibility to touch 400 rwhp with just a top end and headers, if everything is done correctly. IF. (And, it isn't that much effort if you have the IH's off already!!)Strongly recommend matching the IH ports and tapering into the heads. You'll reap some cheap horses in the process. P. Last edited by Paul Workman; 10-13-2013 at 09:23 AM. |
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10-01-2013
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#10 |
Join Date: Jun 2004
Location: Texas
Posts: 2,418
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Re: Steel IH Gaskets & Primary Port is 38mm
Listen to Paul. He knows what he is talking about. What number is your 95? Mine is 392 of the 448 made. Good luck and when you are ready to make her sparkle under the hood and on the wheels give mne a shout.
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95 ZR-1 BLK/Gry #392 LT5 Reg# 868 *RIP* ZR1NET Founding Mem #155 |
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