red85berlinetta

hey guys just a quick question... when i rebuilt my motor i went with an edelbrock performer EPS intake manifold. how ever all i hear on here is that the performer is no better then stock, well i have a question and that is how much HP do you think i picked up over stock and also would i see any type of a good gain switching to a performer RPM with the parts that i have listed. thanks

nsimmons

most magazines show a 10-15hp gain

ljnowell

You know how those magazines are though
IN all honesty, you probably arent losing much. Would it be worth it? Hard to tell. I have seen people lose HP going from a stock intake to a Performer RPM. As mild is your combo is, you probably are cool with it.

nsimmons

My 350 is running the same cam, with ported heads, and a performer. I have no complaints, it runs pretty strong.

Damon

Look at my sig. That's using a Performer intake (not even the newer, better, EPS version) and it's on a VERY mild 350. I've taken the lower Performer intake into the 12s a few times.

red85berlinetta

well damn why does everyone on here bash it and say it no better then stock... i mean can a stock manifold get you into the 12's?

Apeiron

Probably, if the rest of the combination works. That's one of the reasons why the intake is one of the last things to change.

88IROC350TPI

I ran a Performer back in the day and my motor ran pretty darn good ...I switched to a RPM and noticed NO difference in the butt-dyno. I'd say the RPM is a little bit better, but its definately not worth buying a new one over your Performer (in my opinion)...

contactpatch

Is the stock intake really a choke point?
What are the dimensions of the runners?
What are the dimensions of the stock-head's intake ports?

Streetiron85

If you look at the Performer and the RPM side by side, you'll see that the RPM has a greater sectional area to the runners. That, and it's raised a bit to smooth out some of the corners.
The EPS intake has the cleaner flow path of the RPM with the smaller runners of the Performer.
I'm not sure where the Performer intake becomes the weak link. But I honestly believe that the Performer has some better flow than the stocker, in spite of being a stock replacement. And the EPS is an improvement over that.
There are some advantages to the smaller runner intakes but those benefits happen below 2500rpm.
The cam you're using is one that has some pretty nice low end by the looks of it and I'd think that the EPS would compliment that well.
I'll take that EPS off your hands, if you feel like you need to get rid of it though.

88IROK

You're not quite the last Damon, I learned from one of the best, Al Graeber himself!

Teal91rs

Ive got the eps on my 355 and its a great intake. Ive also got a 1 inch carb spacers which pushed the rpm band up a little and gives it great powerband and ill tell you man this things got a low and mid range pull. Id much rather have this than an rpm on a daily driver!

Streetiron85

Would that be a 1" open spacer or 4 hole?

.... If you're still reading

Teal91rs

I bought this car the way it was unlike the nova i didnt build the motor so i would have no idea what it is. With the stuf the guy gave me with the car (bunch of carbs a few distirbs timeing gun power stearing pump starter ect) theres a 1' 4 hole that looks as if it came in pack with a open spacer. ive always worryed if i was looseing perfomance from a 4 hole is this true? MY pops not home so i have to burden you with the lame question

IROC_385Z

Whats up Chris...I thought that was your car up there!

Anyways, just wanted to let you know that I haven't forgotten about you wanting those headers...come March or April I will be rebuilding my tranny and getting some bigger headers so you can have them then, if you still want.

Let me know!

Oh, and don't worry about that EPS, untill you put a REAL motor in that car

five7kid

iTrader: (14)

http://www.nhra.com/2004/events/race...ults/stk.html?

Bottom of the page, winner Jody Lang, '81 Malibu wagon. Runs 12.38 @ 101 mph.

That's a M/SA Stock 305. It must run a factory manifold.

You can make them fast, the only question is how much money you're going to spend getting there.

IROC_385Z

Yea, we all know that if you put enough $$ into any motor you can run 12s in it...but I know this dude and feel obligated to bust his chops!

five7kid

iTrader: (14)

And that Malibu is hardly streetable.

My point was the intake doesn't hold you back until you've done a lot of other things.

IROC_385Z

jmd

iTrader: (4)

It is, but it's not a 30hp increase so it's looked down upon. On the 305 by the thread-starter, the Performer is exactly what I'd use. You'd just lose velocity with the RPM.