Intake Manifold Q

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Apr 23, 2001 | 11:23 AM

Ryan Theroff

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Joined: Apr 2001

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From: Mesa, WA USA

Intake Manifold Q

I am currently porting out my TPI intake manifold. I have completely eliminated all emissions on the car. I am planning to block the exhast passage into the manifold at the head enterance. The exhast gas always flows into the plenum and through small holes into each passage all the time. Has anyone had any problems running in the winter with no exhast gas flow through the intake? Once the car warms up it will run fine but is it a pain to keep running until it warms up? And 2nd how much disruption do those small holes cause and should I plug them? Just wanting to know what other people have found.

Ryan

Apr 23, 2001 | 02:37 PM

custman87T/A

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Joined: Jan 2001

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From: New York

I am no expert but if you disable the EGR you will get an SES light. If you still wish to do it blocking it off at the head may not be the best thing. Call TPIS and get an EGR block off plate for about $9 and just remove your EGR and put plate in it's place.

Apr 23, 2001 | 02:46 PM

Ryan Theroff

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Junior Member

Joined: Apr 2001

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From: Mesa, WA USA

I plan to disable the EGR in the ECM. If I only block the EGR then there is still a constant flow of exhast coming into my intake via the small drill holes into each passage from the underside of the intake. I would like to eliminate all exhast gas coming into my intake air for better performance.

Ryan

Apr 23, 2001 | 03:40 PM

Guido

Supreme Member

Joined: Jul 1999

Posts: 1,827

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From: Indianapolis, IN

Car: 2000 Trans Am

Engine: LS1

Transmission: T56

Fel Pro makes an intake gasket that blocks this for you. It is #1204. You dont have to go through the trouble of filling them just use this gasket and it will take care of it for you.

------------------
-86 IROC
a few mods
this years goal: 10.50 @ 130+ mph
-=ICON Motorsports=-

Apr 23, 2001 | 04:19 PM

Dan87IROC-Z

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Joined: Feb 2000

Posts: 1,196

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From: Fort Collins, Colorado

The EGR isn't all bad. It only works when the throttle is partly closed, under WOT the EGR isn't even "on". It helps your car run more efficently, saves you money at the gas pump and doesn't hurt your car's performance at all.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End

Current Mods: LT4 HOT Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

Soon to Come: 7.625" 10 Bolt with 3.42s and Accel TPI Intake Base