with all
EPS and 1" spacer
Thread Starter
Racer
Joined: Apr 2012
Posts: 319
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EPS and 1" spacer
Anyone using an Edelbrock EPS intake with a 1" open spacer?
I bought an L88 hood for my car and thought about using a 1" open spacer instead of milling the divider in the intake plenum. Curious if anyone is using this combo and how it is working for you?
I bought an L88 hood for my car and thought about using a 1" open spacer instead of milling the divider in the intake plenum. Curious if anyone is using this combo and how it is working for you?
Safety Car
Joined: Aug 2000
Posts: 3,711
Likes: 43
From: San Antonio TX
Not that particular intake, but I do use a 1" open spacer on another car. Spacers are tuning devices and they are very application-specific. Spacer height and configuration (open, split, four hole, taper) will give you a different result on different engines. The only way to know is to try it on your application and see if you get anything from it.
If you pick up power from an open spacer, that in general tells you the manifold wants more plenum volume.
If you pick up power from an open spacer, that in general tells you the manifold wants more plenum volume.
Thread Starter
Racer
Joined: Apr 2012
Posts: 319
Likes: 0
Not that particular intake, but I do use a 1" open spacer on another car. Spacers are tuning devices and they are very application-specific. Spacer height and configuration (open, split, four hole, taper) will give you a different result on different engines. The only way to know is to try it on your application and see if you get anything from it.
If you pick up power from an open spacer, that in general tells you the manifold wants more plenum volume.
If you pick up power from an open spacer, that in general tells you the manifold wants more plenum volume.
I guess I'll try it and see how it goes.
Safety Car
Joined: Aug 2000
Posts: 3,711
Likes: 43
From: San Antonio TX
Your logic is sound on the issue. Milling down the divider wall to open the plenum gives each cylinder a look at the total airflow from the carburetor. A spacer does the same thing and also increases the plenum volume.
Neither of those are a power guarantee, though. Your engine may not at all care for the modification.
Neither of those are a power guarantee, though. Your engine may not at all care for the modification.
2026 Loser of the Year
Joined: Sep 2013
Posts: 36,579
Likes: 7,020
From: New Or-leens Loo-z-anna
My 350 SBC was doing well....so I decided to improve it by adding a 1" spacer.
According to my under-dash vacuum gauge....the engine lost nearly three "pounds" of vacuum and some performance with the spacer.
The spacer is now hanging on the pegboard in the garage.
Other members already said it...."A spacer can help--or can hurt".
According to my under-dash vacuum gauge....the engine lost nearly three "pounds" of vacuum and some performance with the spacer.
The spacer is now hanging on the pegboard in the garage.
Other members already said it...."A spacer can help--or can hurt".
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
It's pretty easy to remove the spacer, but it would be kinda tough to un-mill the divider, so I think you have made a smart decision. If it's a mild engine, I think the spacer will hurt performance and driveability. Try it both ways, and let us know how it works out, OK?
Scott
Scott
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Thread Starter
Racer
Joined: Apr 2012
Posts: 319
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The motor is a Blueprint Engines roller cam 355. The dyno sheet says 410 HP @ 5700 rpm & 417 ft/lbs torque @ 4300 rpm. It's spunky but not in the bad azz category.
I chose the EPS because of it's good 2500-4500 torque numbers. That's where my motor will spend most of it's life. But, I'd like to enhance it's capability if possible.
I chose the EPS because of it's good 2500-4500 torque numbers. That's where my motor will spend most of it's life. But, I'd like to enhance it's capability if possible.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
The motor is a Blueprint Engines roller cam 355. The dyno sheet says 410 HP @ 5700 rpm & 417 ft/lbs torque @ 4300 rpm. It's spunky but not in the bad azz category.
I chose the EPS because of it's good 2500-4500 torque numbers. That's where my motor will spend most of it's life. But, I'd like to enhance it's capability if possible.
I chose the EPS because of it's good 2500-4500 torque numbers. That's where my motor will spend most of it's life. But, I'd like to enhance it's capability if possible.
Scott
Thread Starter
Racer
Joined: Apr 2012
Posts: 319
Likes: 0
And, the occasional high rpm blast.
Last edited by SteveCurry; Nov 25, 2013 at 10:41 AM.
Thread Starter
Racer
Joined: Apr 2012
Posts: 319
Likes: 0
I'm also going to use the Energy Suspension motor and trans mounts. I'll have more hood clearance with the dual plane than with your Victor, but no way the EPS and spacer would fit under the small block hood.
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
Well, having the open spacer should help it idle like crap, but it's really just a crutch, if you really want it to idle crappy, get a single plane manifold. A couple of other things that will help are retarding the timing at idle, and adjusting the idle mixture on the lean side. These both will help the engine run like crap at idle, so it will sound cool. An additional benefit is the poor gas mileage you will be able to brag about.
Scott
Scott