Sup guyz. I need some help with this Edelbrock High-Flow #3860 intake base plate. My IROC only has one EGR valve but this new base plate has 2 EGR passages. Should I purchase a EGR block off plate to cover the extra hole? What about these runners? They are most definately not for my Plenum. So what do they go to?

 

Block it off>
Those are Super Ram Runners.

 

So then the base plate is perfect for my 86 TPI? Perfect. So I should toss these runners. I dont need em. To me they are trash. I need the high flow runners. Damn.

 

Wouldn't do that .
Super Ram parts no longer made and rare so worth $$$ to the right person.
Put them up in For Sale dept ; not the rubbish bin

Because the Edelbrock hi Flow base is a bolt on fit for Vettes and F-Bodies which use different EGR setup.
Just cap what ever one you aren't using

 

So then this base plate is perfect for my 86 IROC. Excellent! Lets go PM.

 

what would happen if its not block off. does it cause to lose power or something else?

 

It blows exhaust out of said hole.

 

....and you will have a big vacuum leak along with a much unwanted very high idle.

 

The 'extra' EGR is for use on the Corvette as they use heads without an internal EGR passage.

 

was the performance difference worth the price tag on that base plate? i've been thinking of picking some up from summit and want to be sure im not just wasting money.

 

I havent installed it yet bro. Im broke until income tax. But rest assured. Once I get it installed, Ill post up to let you know if there is a difference.