I have a 79'Z28 daily driver. I currently have a Performer intake but I want to change it to something for more HP. So what is better, the Air Gap or a Vic Jr? Running with a 750 Holley, 278cam. Will give more info if needed. Thanks!

 

it depends on wether you are talking adverized or .050 duration on that cam.

if its 278 deg at .050 then the Victor Jr would be a good choice.

if its 278 deg advertized duration then stay far, far away from that Victor Jr, or any other single plane intake. they build power much higher than that cam is made to. go with the RPM Air gap in that case. though I have heard that neither will fit under the stock hood (not sure, I have a Firebird, not a Camaro)

since most people dont consider a cam with 278 deg at .050 very streetable (and you mentioned it was a daily driver) I would have to guess that you have a 278 advertized duration cam, and therefore would suggest the RPM Air gap.

 

Yes advertised duration.

Also, the Air Gap sits about .80" higher than the Performer. Almost 1", so Im okay with the hood clearence. I also think the Vic starts major HP at about 3000 rpm - 7000 rpm. If I pushed to 7000 I think I'd kiss my top end bye bye.

I drive this car about 60 miles per day, at about 9 mpg. I think this will be worse when I change intakes. But Im about to put in my 3:42 rear again and take out this 4:10. Its killing me on the frwy, but killing "them" at the lights.

If anyone has a Air Gap intake, please let me know your opinions on it before I spend $200.00 for it. thanks!

 

rpm

i put a vic-jr on my car and after all the tuning i did, i was still 2 10th and 2mph shower then my rpm

 

They are two radically different intakes. Notably one is single and one is dual plane. They are built for totally different applications.

I would say stick with the dual plane.

 

yea thanks guys! There's a swap this weekend buy my house, I think I'll go there and look for an air gap. Thanks for the help.

 

If you are talking about a performer rpm air gap then that should work....pay in mind the characteristics of that manifold though, it oikes to be in the 2300-5000 RPM range even though it's a dual plane..

 

Yea, to help with the rpm range, Im also changing my converter to a 3000 stall. I've also seen in Summit that Edelbrock also offers the Air Gap in a Idle - 5500 rpm range. In any case, Im kinda going at everything blind so Im trying to get input. After the intake, I'll be in the market for some heads.

 

Daily driver? I'd have to say stick with the dual plane intake. My dad's '73 Camaro has an RPM Air-Gap on it, and so far it seems to work really well. AFAIK, single plane intakes are more intended for race-only applications, as they strictly produce high horsepower numbers at high RPM's, but dual planes are intended to produce good low-end torque, as well as decent top-end power too. For a street car, I don't think there's any other option really.

Just my $.02.

 

Is that the original motor in that car unrebuilt? If so you might one to put another one in it, that motor was an LG4 low output 350 pushing a whopping 170 horses!!! 3,000 stall is overkill to the highest degree! be in the market for a cam, then heads, then intake, and then 3,000 stall and put them all on at once, also carb as well, I recommend an avenger from Holley, unless you know the specs of your motor already and the exact cam in it. Just remember everything has to be matched to what you plan on doing..

 

The motor and tranny is from a 74 Malibu I drove when I was in high school. I dropped'em in my 79 z28 after I graduated 10 years ago, and about 3 months ago I had everything rebuilt. 9.64:1 compression, 278 cam advertised & 218/224 @ .50 (I think), 750 holley, Performer intake, rebuilt stock heads 882's, th350 trans, 4:10 rear. (Im also in the market for some heads)

Im also about to put the 3:42 rearend back in because Im not using this car for the strip, just a bad a$$ daily driver and cruiser.

So with the above, do you think the 3000 stall is overkill?

Do you think the Air Gap is the right choice then?

Help! thanks!

 

those 882 "smog" heads are killing you!! If you still want a stall, go with a B&M holeshot 2400 depending on your budget and want you want to do with your daily driver I can put together a combo that will put you in the playing field, what is your ultimate plans??

 

don't wast your time with a performer....

 

You in the market to sell ya' some 4.11, if so talk to me before ANYONE else :-D

 

My ultimate plans are 400hp and 350lbs of torque.... or something close to it. I'd like to keep my cam and my carb, but I'll need some bad heads to begin with. Also, my low end sucks starting off with my stock converter so I'd like to go with a higher stall. There is a big swap meet tomorrow so I'm going out there with a few bills and hope to find some heads I can work with. Any suggestions on resonable $$$ heads that will get me on the right path?