Cascade Crew

blue89 · Posted: Fri Aug 11, 2006 11:37 am Post subject: Custom 60V6 Intake

I'm starting the custom upper intake. This is the first prototype that i just got last night. It hits the schrader valve, but i think everything else is okay. Throttle linkage to be worked later when i get the TB neck designed. The final piece will be made out of 16awg steel. I'm doing steel because its cheap, easy to build, and i like it.

90droptoproc · Posted: Fri Aug 11, 2006 11:47 am Post subject:

sweet when you get all the bugs worked out I will have to give your idea a chance on my other car Twisted Evil

Dewey316 · Posted: Fri Aug 11, 2006 11:52 am Post subject:

I am honestly suprised you V6 guys, haven't taken intake and cam spec lessons, from makers of very high HP small engines. Look at the plenum/runner desings of something like lay a porsche, they use basicly velocity stacks, that intregrate into a very large plenum (1.5 times the engien dispacement). On my audi I5, it has a similar plenum, design, with a large round plenum. I know chevy seems to like square plenum designs, but the other makers who make huge HP/L numbers, all seem to use a cylindrical plenum, with velocity stack type runners.

Just a thought.

In Corky Bells book, Maximum Boost, he has a chapter on intake design, although it is taylored for turbo applications, it has good info, and cut-away's of several intakes from street cars, and race cars. Especialy interesting are the desings of the intakes from the mid 80's era F1 cars, that ran turbo V6's but made 800-900 HP.

--John

Xophertony · Posted: Fri Aug 11, 2006 12:02 pm Post subject:

wow, what a major project. why not make a custom lower as well? i had always invisioned somthing with round tubes, like v8 TPI that had a mostly flat upper plennum (like yours) going into round mandrel bent tubing (from an exhaust shope) into a modified stock base, or a close copy. that way you could eliminate the 135* hard angle the air must take now.

do you have any concept drawings or are you just playing by ear? what do you hope to acomplish with this? more tourqe at low end? more HP at top end? what are your expected gains?

i think that is all the questions i can think of right now Rolling Eyes

somthing like that, to give a visual, is what i would want. this is the intake on redraifs engine. i would build somthing like this. i have also seen a few people do almost exactly what you are doing, and they all claimed prety big numbers. you are taking a 135* bend and making it into a 90* bend. that is much better. i can't wait to see this thing at next years dyno gathering. i think you will beat all the other sixes. Shocked

EDIT** ninja'd. i started this post before ian, i think this would satisfy johns requirements. also keep in mind the 60* platform needs to have room in there for the fuel rail. so we can't run a straight up "velocity stack" style design. (which is too bad cause that would kick ass.

blue89 · Posted: Fri Aug 11, 2006 12:18 pm Post subject:

I like doing different things.

This intake design eliminates 4" of intake runner, and changed the plenum volume by at least 5x. This will tune the intake to a more useable RPM for sure. I used an engine design book to calculate volumes for a tuned intake resonance of 5500rpm. Being that I will rev the engine to 7k means i need to hit peak torque around 1kRPM below redline for a 2k power band. I will more than likely loose 10ft.lbs of torque, but the horsepower gains should take me above 200hp! Rich already knows my engine sounds crazy sitting at 6000! I just want it to really start pulling at 6000 instead of loosing power after 4000.

SO, the goal of this intake is to tune it at 5500. This involves letting the engine breath, and making the plenum volume and TB neck the right sizes/volumes to do effective tuning. I also need to do some sort of velocity stacking in the middle manifold, as well as increase my valve lift from .430 to .480 by using 1.6:1 rockers because of the valves mach index. Its a little low to say the least.

Dewey316 · Posted: Fri Aug 11, 2006 12:19 pm Post subject:

What are your cam specs? No intake work in the world will make a stock cammed motor, make power to 7k.

90droptoproc · Posted: Fri Aug 11, 2006 12:25 pm Post subject:

this isnt your average "V6 guy" you are dealing with he has more time invested in this little sixer then I do in my 355 and my 350 together, Travis knows what he is doing and I can't wait to see how this intake works out

Dewey316 · Posted: Fri Aug 11, 2006 12:28 pm Post subject:

I wasn't critizing, I am asking.

90droptoproc · Posted: Fri Aug 11, 2006 12:31 pm Post subject:

just syaing i doubt you have to worry about it having enough cam, but I didnt know the exact spec, thats all I'm saying

Dewey316 · Posted: Fri Aug 11, 2006 12:33 pm Post subject:

90droptoproc · Posted: Fri Aug 11, 2006 12:35 pm Post subject:

lol he was just on here, I saw his name anyhow, but he is probly surfing from work so he will be back soon:P

blue89 · Posted: Fri Aug 11, 2006 12:40 pm Post subject:

I think the specs are .286 lift, 206* duration. I don't have my "Travis's Ultimate Camaro Build Note Book" on hand (its in the car at home). The heads have been ported, polished, gasket matched, 3 angle valve inserts, and completely unshrowded. I also intend on getting an adjustable cam gear to help it move the power band up a bit.

I'm having my friends with a CNC Laser cut everything. You can see in the picture that the intake cutouts look dang exact for a 22awg prototype. This piece doesn't interfere with the injectors, just the schrader valve. Maybe I'll just take it off and plug it....