Home made air intake for '96-'99 Vortec trucks.

[XXL]

Originally Posted by CKTA

The only things i see is that the elbow is very restrictive and the filter sits right over the manifold.

Good point on the restrictive elbow. I think I like the simplicity of this one... and, like my pic above, it doesn't actually sit over the manifold like it may appear to in the pic. Now just trying to figure out the best way to get cold air ducted up to it at that location.

[too_g]

i just did this mod and it sound great and i have noticed a little bit mor kick of the line but nothing major i did it on a 98 1500 5.7 vortec short box ext cab

[scottx]

The elbow isnt that bad, It pulls very strong. I might change the elbow into something else. I've been poking around plumbing supply places looking for a 3 inch - 22 1/2 degree _chrome_ elbow. Might just get one fab'd.



< http://www.vulnerable.org/gallery/96 >

[XXL]

Originally Posted by scottx

Might just get one fab'd.

I've got a guy fabbing up a piece that'll pop over the throat of the throttle body, and curve out from there. It's drawings so far, but this guy has made several pieces for me in the past and always did top-notch work. After all is said and done, I'll probably have spent more than just buying the K&N 77 kit, but it's only money

[96chevywhip]

I also have the cheap $30 version from ebay notice some nice throttle response from it.

['95-Silverado]

I attempted this with a 95 Silverado, non-vortec and the results where just as good. For anyone reading that would want to do this.

Here is a pic I took right after I got it to work, I had to rearange it the get more air flow so it looks different now, but here's the idea.





I did not flip the lid since I've had it fliped for a while because I would like the intake to actually do it's job, and it does it well.. Ive noticed better gas mileage by 10% and much better throttle response, and it sounds cool starting up, the whine of wind.

Thank's for the idea CKTA =D

[scottx]

If i was you i'd get rid of that and run a straight round 14x3 inch K&N with a nice base/lid. But that's just me. I have a 1990 Silverado also, Runs this K&N (The filter has around 200K miles on it btw)

[OlemissRebelZ71]

Check out the air duct department of home depot of loews and get some foam instulation tape and some foil reflective tape and put it on your home made airboxes and you will notice better performances and gas mileages. make sure the foil goes on the outside. it reflects heat. the foam tape adds insulation to the box against heat as well. try it. the foil tape is a lil pricy but its worth it. you get 30 yards. lol

['95-Silverado]

Modified it a little bit more, but couldn't get a GREAT shot of it.. here's an idea.

[XXL]

Originally Posted by '95-Silverado

Modified it a little bit more, but couldn't get a GREAT shot of it.. here's an idea.

Interesting approach. It seems like you'd lose both the "streaming" effect on the air column and the pressure because of the old filter canister on top of the throttle body. If you look at the aftermarket units, they tend to keep air turbidity down by keeping bends smooth all the way to the TB throat, and they keep pressure up by eliminating any large volume chambers.

[CKTA]

Are you using 2 filters w/ that set-up on the TBI.

[bob3sons]

I'm looking for ways to get a couple more mpg's. I have a 96 c3500 crew. Seems like the air intake is a good place to start. Anyone have mpg data on before and after?
Thanks.

[miesrules]

There's nothing like American ingunity (spelling)! I wish there was an easy solution for my 01'.

[tallone09]

well i'm fixing give the mod at try let you know how it works out. one question where the roof clamp bolt to the way i understand you bolt it where the heater hose are bolted to on the fenderwell is that correct?

[CKTA]

Originally Posted by tallone09

well i'm fixing give the mod at try let you know how it works out. one question where the roof clamp bolt to the way i understand you bolt it where the heater hose are bolted to on the fenderwell is that correct?

Correct...sort of. No bolts needed. What I did was take the plastic clamp off (it just clips on the inner fender) drilled out both holes a little bigger on the pipe hanger, lined the holes up w/ the inner fender then snapped the plastic hose holder back in place samwiching the pipe hanger in place.......nice and neat and no hardware needed.

[tallone09]

Originally Posted by CKTA

Correct...sort of. No bolts needed. What I did was take the plastic clamp off (it just clips on the inner fender) drilled out both holes a little bigger on the pipe hanger, lined the holes up w/ the inner fender then snapped the plastic hose holder back in place samwiching the pipe hanger in place.......nice and neat and no hardware needed.

ok thanks get back when i get it done. let you know what i think.

[XXL]

Just ran across this interesting setup while surfing...

['95-Silverado]

Originally Posted by XXL

Interesting approach. It seems like you'd lose both the "streaming" effect on the air column and the pressure because of the old filter canister on top of the throttle body. If you look at the aftermarket units, they tend to keep air turbidity down by keeping bends smooth all the way to the TB throat, and they keep pressure up by eliminating any large volume chambers.

I realised this after I noticed a significant power loss.... So I remodified it and I got rid of that bend and straightened it out, and the flow is even and continuous. About the two filters, I took the cylinder K&N out of the air box over the TBI unit so I was just using the cold air filter. I didn't see a point in having two filters, and besides that's a little restrictive.. Wouldnt you think?

So anyway way, after changing the setup and straightening it out, It runs much better.

[95baggedsierra]

I just completed mine also and it fit & works great!!!! I'll get some pics!!!!THANKS FOR THE INFO!!

[96thebossgrnchv]

the silencer vortec box, has anyone blocked it off? if so what did you use to cap it off, i've heard that it makes your intake louder, the guys at http://www.sshotrods.com/fullsize/v3xx/airbox/ used a coke bottle.