C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Custom Stealthram plenum picture

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Old Apr 16, 2003 | 11:21 AM
  #21  
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From: loxahatchee fla
Default Re: Custom Stealthram plenum picture (loiq)

the stealthram does not have EGR standard . yes its posiable to hook up but would take additional work to do so, contact me for price info
my EMAIL address is under the PROFILE (USER NAME)



[Modified by grumpyvette, 4:24 PM 4/16/2003]
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Old Apr 16, 2003 | 11:29 AM
  #22  
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Default Re: Custom Stealthram plenum picture (grumpyvette)

While on the EGR subject, are there any long term side effects of disabling the EGR? If this is disengaged can I see any power results? Would it be worth the removal? And if so, how?
Thanks!
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Old Apr 16, 2003 | 11:37 AM
  #23  
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From: loxahatchee fla
Default Re: Custom Stealthram plenum picture (Dcvertigo)

other than an occasional code 32 the engine runs fine, and still passes emissions testing
ECM Codes

Code Circuit or Sensor

13 Oxygen Sensor Circuit
14 Coolant Sensor Circuit (High)
15 Coolant Sensor Circuit (Low)
16 Ignition Pblms (Used on 1992-1996 models only)
21 Throttle Position Sensor (TPS) (High)
22 Throttle Position Sensor (TPS) (Low)
23 Intake Air Temperature (Low)
24 Vehicle Speed Sensor (VSS)
25 Intake Air Temperature (High)
26 Quad Driver Module Number 1
27 Quad Driver Module Number 2
28 Quad Driver Module Number 3
32 Exhaust Gas Recirculation Circuit
33 Mass Air Flow Sensor Circuit (1985-1990)
33 Manifold Absolute Pressure High (1984)
34 Mass Air Flow Circuit (1985-1990)
34 Manifold Absolute Pressure Low (1984)
35 Idle Air Control Circuit (IAC)
36 Mass Air Flow Burn Off Circuit
41 Cylinder Select Error Circuit (1985-1991)
42 Electronic Spark Timing Circuit (EST)
43 Knock Sensor Circuit
44 Lean Exhaust Present
45 Rich Exhaust Present
46 VATS Anti Theft Circuit Fault
51 PROM/EEPROM Error
52 Oil Temperature Circuit (Low Temperature)
53 System Charging Voltage High or Low
54 Fuel Pump Circuit (Low Voltage)
55 Engine Running Lean
62 Oil Temperature Circuit (High Temperature)
63 Oxygen Sensor Circuit (Open)
64 Oxygen Sensor Circuit (Lean Exhaust)
65 Oxygen Sensor Circuit (Rich Exhaust)
66 Air Conditioner Pressure Limit Exceeded
67 Air Conditioner Pressure Limit Exceeded
68 Air Conditioner Relay Fault
69 Air Conditioner Clutch Fault
72 Gear Selector Switch Fault (Start Lockout)
BTW
compare prices
http://www.jegs.com/cgi-bin/ncommerc...19&prmenbr=361
http://www.moreperformanceinc.com/miniram.htm


[Modified by grumpyvette, 6:52 PM 4/16/2003]
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Old Apr 16, 2003 | 05:33 PM
  #24  
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Default Re: Custom Stealthram plenum picture (DiabolicalDave)

a little more on the lower stealth plennum:
there is no water passage on the rear like a miniram.
Bung for water temp sensor on top of the front water passageway not on the front vertical surface we L98 guys are used to.
Grumpy, got your plennum today. I will try to install tonight. What size are the throttle blade bores?
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Old Apr 16, 2003 | 05:38 PM
  #25  
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Default Re: Custom Stealthram plenum picture (89 Paul in Cal)

89 Paul- can you give us a blow-by-blow account of your Stealth Ram install? I am very curious about how it installs in a Corvette. I would be others on the forum are curious as well! Let us know how it runs as well. :seeya
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Old Apr 16, 2003 | 05:47 PM
  #26  
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From: loxahatchee fla
Default Re: Custom Stealthram plenum picture (loiq)

PLEASE READ AND FOLLOW THE INSTALLATION INSTRUCTIONS BEFORE THE INSTALLATION NOT AFTER....YOU HAVE QUESTIONS
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Old Apr 16, 2003 | 07:04 PM
  #27  
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Default Re: Custom Stealthram plenum picture (grumpyvette)

(2) the bolts going thu the plenum are smaller in dia. than the holley plenum and have no measurable effect on the airflow into the ports (I TRIED IT BOTH WAYS DURING TESTING)BUT AN INTERNALLY BOLTED PLENUM HAS THE POTENTIAL FOR A MOUNTING BOLT WORKING LOOSE AND DROPPING DOWN AN INTAKE PORT! , USEING BOLTS THAT ARE AIRCRAFT WIRED TOGETHER TO PREVENT THAT PLACES THE WIRES DIRECTLY BETWEEN PORTS AND THAT DOES ALTER FLOW SLIGHTLY)
I don't know what testing was done but this post should help clear up that issue.
http://forums.corvetteforum.com/zerothread?id=527742

Anyway the bolt is not the reason I like the other plenum much better. Honestly, I would not choose to use the manifold but that is my preference. I just feel based on my experiences that there is more potential in the plenum in the pictures I posted. I have no vested interest in either just a preference for one design over the other.

Art
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Old Apr 16, 2003 | 07:57 PM
  #28  
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Default Re: Custom Stealthram plenum picture (grumpyvette)

How much is your plenum and how do I go about gettin' one?
VetteDave :smash:
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Old Apr 16, 2003 | 10:44 PM
  #29  
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From: loxahatchee fla
Default Re: Custom Stealthram plenum picture (~VetteDave~)

if you read the post carefully youll see he tested the HOLLEY plenum flowing thru the throttle body intake port holes and his version with NO LID ON THE PLENUM AT ALL. and still the differance was only a few CFM "FLOW WITH COVER OFF FIC PLENUM TO SEE WHAT THE ACTUAL INTAKE RUNNERS FLOW WITH NO OBSTRUCTION.
if he would have tested with air flowing into the throttle body intake ports even that differance of a few cfm would have been even less



[Modified by grumpyvette, 3:47 AM 4/17/2003]
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Old Apr 16, 2003 | 10:58 PM
  #30  
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Default Re: Custom Stealthram plenum picture (grumpyvette)

What are your flow numbers?
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Old Apr 16, 2003 | 11:32 PM
  #31  
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Default Re: Custom Stealthram plenum picture (DiabolicalDave)

I cannot WAIT for some dyno numbers! I don't care what it's on, I just want to see either a TPI- StRam or SuperR - StRam comparison. Shoot, even a mini-r vs St Ram...

And we can't use "SR" for superram anymore! Too confusing!!! :thumbs:
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Old Apr 17, 2003 | 10:12 PM
  #32  
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Default Re: Custom Stealthram plenum picture (Ramanstud)

Don't hold your breath waiting on dyno numbers from me. I'm doing the swap the first week of July. As these sorts of things go, it might be a few weeks after that when all the little details/bugs are worked out. If it runs great right off the bat, then I might not even bother going to a dyno. If I end up having to go to a dyno to get the chip tuned, that'd probably be the only reason I'd spend my money on a dyno. Maybe if I find myself at an event where it's not much $.
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Old Apr 17, 2003 | 11:02 PM
  #33  
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Default Re: Custom Stealthram plenum picture (Ramanstud)

I cannot WAIT for some dyno numbers! I don't care what it's on, I just want to see either a TPI- StRam or SuperR - StRam comparison. Shoot, even a mini-r vs St Ram...

And we can't use "SR" for superram anymore! Too confusing!!! :thumbs:
Do a search, the last Stealth / Grumpy thread had a side by side dyno post listed in it.
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