Egr question?
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Joined: Apr 2008
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From: Michigan
Car: 1985 Trans Am
Engine: built 355
Transmission: th350
Axle/Gears: Borg warner 3.08's
Egr question?
I have a 1985 Trans am and I have a 750cfm edelbrock performer carb. I was wondering what would happen if i removed my EGR system to put the carb on my car. The carb is set up for no EGR valve. I have already removed the smog pump and the catalytic converter. Does anybody know how much HP the carb is rated for?
Last edited by TransAm_85; Jun 21, 2008 at 09:20 AM.
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From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Re: Egr question?
How much HP will depend on whats under the carb, and how well you can tune it. A 750cfm carb should be capable of supporting a 500hp engine though. Though honestly, the stock Qjet or a mechanical secondary Holley would be a better choice for a performance carb. The Edelbrock carbs aren't bad, in that they function well, but they are a pretty outdated design from the 1940s/1950s thats been surpassed since by the 4150/4160 Holleys and the Qjet.
Aas for EGR, if its still working, leave it there - you aren't going to gain any power by removing it if it still works properly. EGR only works at light throttle, not at idle or under power (WOT). It cleans up the exhaust somewhat and improves gas mileage. You'll notice a drop in gas mileage if you remove it, and thats about it really.
My advice would be to keep the Qjet, unless there is some unknown-to-me reason for you replacing it. The Qjet will give better power, drivebility, and fuel economy over the Edelbrock carb if everythings working properly. What made you want to change carbs?
Aas for EGR, if its still working, leave it there - you aren't going to gain any power by removing it if it still works properly. EGR only works at light throttle, not at idle or under power (WOT). It cleans up the exhaust somewhat and improves gas mileage. You'll notice a drop in gas mileage if you remove it, and thats about it really.
My advice would be to keep the Qjet, unless there is some unknown-to-me reason for you replacing it. The Qjet will give better power, drivebility, and fuel economy over the Edelbrock carb if everythings working properly. What made you want to change carbs?
Thread Starter
Junior Member
Joined: Apr 2008
Posts: 56
Likes: 0
From: Michigan
Car: 1985 Trans Am
Engine: built 355
Transmission: th350
Axle/Gears: Borg warner 3.08's
Re: Egr question?
How much HP will depend on whats under the carb, and how well you can tune it. A 750cfm carb should be capable of supporting a 500hp engine though. Though honestly, the stock Qjet or a mechanical secondary Holley would be a better choice for a performance carb. The Edelbrock carbs aren't bad, in that they function well, but they are a pretty outdated design from the 1940s/1950s thats been surpassed since by the 4150/4160 Holleys and the Qjet.
Aas for EGR, if its still working, leave it there - you aren't going to gain any power by removing it if it still works properly. EGR only works at light throttle, not at idle or under power (WOT). It cleans up the exhaust somewhat and improves gas mileage. You'll notice a drop in gas mileage if you remove it, and thats about it really.
My advice would be to keep the Qjet, unless there is some unknown-to-me reason for you replacing it. The Qjet will give better power, drivebility, and fuel economy over the Edelbrock carb if everythings working properly. What made you want to change carbs?
Aas for EGR, if its still working, leave it there - you aren't going to gain any power by removing it if it still works properly. EGR only works at light throttle, not at idle or under power (WOT). It cleans up the exhaust somewhat and improves gas mileage. You'll notice a drop in gas mileage if you remove it, and thats about it really.
My advice would be to keep the Qjet, unless there is some unknown-to-me reason for you replacing it. The Qjet will give better power, drivebility, and fuel economy over the Edelbrock carb if everythings working properly. What made you want to change carbs?
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
The EGR valve opening is controlled by the EGR solenoid. The EGR solenoid is controlled by the ECM. Without the input from the q-jet throttle position sensor, the ECM isn't going to properly control the EGR.
It's not that your Edelbrock isn't made for EGR (it is for non-computer controlled EGR systems), it's that your EGR isn't made for the Edelbrock.
I would guess that it isn't your q-jets that aren't working, but some part of the CC system. You can't just put the Edelbrock on (it won't fit on a stock manifold, for one thing), you have to spend money on other things as well - vacuum/mechanical advance distributor, throttle valve geometry corrector bracket and TCC lock-up provision if auto transmission, etc. More than likely, the real "fix" is to fix whatever is wrong with your current system rather than downgrading to an Edelbrock carb.
It's not that your Edelbrock isn't made for EGR (it is for non-computer controlled EGR systems), it's that your EGR isn't made for the Edelbrock.
I would guess that it isn't your q-jets that aren't working, but some part of the CC system. You can't just put the Edelbrock on (it won't fit on a stock manifold, for one thing), you have to spend money on other things as well - vacuum/mechanical advance distributor, throttle valve geometry corrector bracket and TCC lock-up provision if auto transmission, etc. More than likely, the real "fix" is to fix whatever is wrong with your current system rather than downgrading to an Edelbrock carb.
Thread Starter
Junior Member
Joined: Apr 2008
Posts: 56
Likes: 0
From: Michigan
Car: 1985 Trans Am
Engine: built 355
Transmission: th350
Axle/Gears: Borg warner 3.08's
Re: Egr question?
The EGR valve opening is controlled by the EGR solenoid. The EGR solenoid is controlled by the ECM. Without the input from the q-jet throttle position sensor, the ECM isn't going to properly control the EGR.
It's not that your Edelbrock isn't made for EGR (it is for non-computer controlled EGR systems), it's that your EGR isn't made for the Edelbrock.
I would guess that it isn't your q-jets that aren't working, but some part of the CC system. You can't just put the Edelbrock on (it won't fit on a stock manifold, for one thing), you have to spend money on other things as well - vacuum/mechanical advance distributor, throttle valve geometry corrector bracket and TCC lock-up provision if auto transmission, etc. More than likely, the real "fix" is to fix whatever is wrong with your current system rather than downgrading to an Edelbrock carb.
It's not that your Edelbrock isn't made for EGR (it is for non-computer controlled EGR systems), it's that your EGR isn't made for the Edelbrock.
I would guess that it isn't your q-jets that aren't working, but some part of the CC system. You can't just put the Edelbrock on (it won't fit on a stock manifold, for one thing), you have to spend money on other things as well - vacuum/mechanical advance distributor, throttle valve geometry corrector bracket and TCC lock-up provision if auto transmission, etc. More than likely, the real "fix" is to fix whatever is wrong with your current system rather than downgrading to an Edelbrock carb.
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