Okay, how do you port all the way down the runner...
Here's some pics of the porting i've done so far:





Also, does a velocity stack in the intake make sense? Having the plenum-runner ports about 1.80' and siamesed.
Then having the runner-baseplate ports about 1.72'?
I'd do the runner-baseplate ones to 1.80' too, but i'm worried for lack of aluminum (shown in the pic) I don't want them to warp due to heat.. How much more could I port out the bottom ports?



Your suggestions would help greatly!

 

I wouldnt go farther at all, you might not have any flange left to get a good
seat on the gasket! haha, I think your already pushing your luck honestly, due
to exactly what you mentioned, heat. It could eventually weaken and an issue
could arise.

You should be ok, but as soon as you start hacking away at the middle, ALOT
of the runners seating surface will be gone, adding even more stress to the perimeter
of the runner flange. Nice Grindin' tho, looks good!

 

Thanks for the reply. I don't plan on siamesing the bottom ports, I just needed to know from you experienced guys how much of the flange I need to get a good seat and to not warp.
Thanks,

 

You still have enough aluminum there, but I wouldnt go anymore
inside the black box... in fear the bolt holes, gasket area and the
perimeter could weaken and that could eventually break. Since your
leaving the bottom alone, then itll still have some good surface to mate
with the intake base... not so much a threat now.

Runner sometimes are a pain to install and work around, or
they get dropped or hit or something stupid happens, ask how
many dents ive had to remove! hehehe!

It looks good, grinding anymore wouldnt really justify the
risk.. You hogged it out pretty good already, looks like
AS&M LTR's at a quick glance.

 

Thanks for the input, I finally got my flexshaft working so I can go in more, the bottom is just a little porting, the top is about 1.75", i'm gonna get them to 1.8', and the bottoms are at 1.7' ish

 

Do post up the finished job! Hopefully itll net you the gains your
looking for, I know itll make a difference, but the intake base has
a few restrictive spots as well.. there is not anything you can really
do about it.. even aftermarket TPI bases have similar drawbacks..

Who cares tho right, torque is outstanding throughout 3/4
of the RPM band.. which makes for a fun street car no matter
what!

 

Ya, well these are edelbrocks. And I have an eddy base as well that i'm going to port. I bought this of a friend in town for a great deal, he's a good guy. Then sent them to a bud in regina too maching the gasket face because on was uneven. But anyways ya, I Should see a great gain with this intake, roller rockers, headers, 3" ypipe, custom tune, afpr. I'm stoked. But i'll def post the finished product!

 

What heads/cam you running, factory?

Id put off the tune until you change cam profile, especially if the beast is
breathing past 5200rpm. The mods listed shouldnt require a tune for the car
to run decent..besides the 24lb injectors, that needs to to accounted for.
but even then.. it should still move around decently!

 

Well i'm sending my backup chip to scott hansen, for $65 he'll set the fuel injector rate, fan turn on, and just little things, just to get her dialed in. Im running stock just bolt ons, next year im gonna run a nicely built 350.
But the thing that pisses me off is I bolt the runners to the baseplate and about a millimeter of the runners is showing. Now the edelbrock base is what 1.7" maybe unported, and the runners are about 1.72". So that makes me upset that they dont match and I now have too fix that...

 

**** retentive perfectionist too, eh? same here! hahaha.

 

Ya, it's bullshit how they can get away with that, oh well, I guess they are just casts. How do you port all the way down the runner though?

 

pneumatic straight angle die grinder with a rosebud?
..Im trying to find a picture of what ive used, I just cant think of the term.

I always called it a rosebud, they make them short or with
long shafts for grinding in tight, accurate places!

 

.

 

The "velocity stack" will be in the plenum. I assume you are talking about the round lip leading into the runner. If so round the edges of the runner entrance in the plenum.

 

I mean "velocity stack" as in a larger port in the plenum and runners going into a smaller port at the runners and base, cause the "velocity to stack" and cause an almost whirlwind effect. My buddy in mechanical engineering was explaining it too me. Im in civil engineering so I know nothing of that.

And TPI I got a fair ways down the runner with my flex shaft, but I just want to be able to port the "entire" runner. Oh well, i've got 3 months to mess around with my intake =)

 

Velocity stack. Also known as runner taper. The idea like you said is to speed up the air so that it has a ram effect when the intake valve opens. You also need to look into intake harmonics. Horsepower to be had if done properly. Also you might consider siamesing the runners to get the "proper" length for the rpm that you want peak horsepower to occur. Lots of things to think about including the proper cross sectional area of the runner.

 

Oh wow, youve done your hw hey. Well i'm planning on siamesing the plenum and runners (plenum - runner ports) I want to do an 1 1/4" tall siamese and 1.5" deep. Like I said only on the top ports of the runners. Then leave the runner - base ports at about 1.75". Should feed my stock engine a fair amount of air. Also going to be adding a custom cai and then an air foil. So I should be good there. I did 1 side of 1 runner today and man did it turn out nice. Now I just have to get the 3 inch cut off discs and adaptor for my die grinder and i'm set to siamese. And I have to wait on my 200 1/2 sanding drums that I ordered off of eBay for my rotary tool.
I'll post progress pics for all the new guys that are scared too port. THIS IS MY FIRST TIME TOO, so i was very scared...

 

So I started the full runner porting today. I finsished half of one runner, but still need to run sanding drums over it to smooth it out. I'll post pics in a few hours, but man do they look hogged out!

 

Alright here's the passenger side front ports, enjoy!









As I was working on my 3rd port, my fricken flexshaft somehow broke. So this is gonna be put on hold for a week or so until I can find a new one....

 

Extrusion hone?

 

Dremel + flexshaft + grinding stones. I have yet to use sanding drums to smooth the grinds down. It's a long process, but the results look professional.

 

Looking really nice, I never tried a dremel with a flexshaft before.. Looks
promising! Getting the job done nice & clean! I hate when tools break in
the middle of a job!

 

Good news is my buddy lent me his flex shaft, so I have time to buy one off of ebay with a slim head. I am about a centimeter away from a full port. So the entire runner is about 1.8" throughout. This is gonna be a sweet intake come summer, matched with my baseplate, and headers, and all of my supporting bolt ons. Should be a mid 13 second car!

 

I bet with some slight suspension upgrades you could click off a time near
that in stock form on a nice day with a good launch and those bigger lungs!

Glad you tracked down another one!

 

Planning on KYB stuts and a eibach pro lowering kit, along with spohn lca's and panhard bar, and umi lcar relocation bolt on brackets. Hopefully mid summer I can pull my car in the garage and get them on. Hoping to start on the baseplate next in a few weeks, I still have to finish the other runner. Know a good place where I can get the orange grinding stones for a dremel from? For a fairly cheap price?

 

LOOKS NICE.I hope I didnt remove too much material in my gasket sealing area.I did go through in a few spots but we hogged the hell out of mine.Siamesed halfway down the runners,and the plenum.Forget the measurements but i can get a golf ball to drop all the way inside the upper runners.Sealing will be close but nothing some epoxy cant fix if I run into issues.Mines not installed yet.just hope I dont have too many problems.I used a pneumatic die grinder with carbide tip to remove material then polished it all up with a coarse then fine sanding roll.Just cant find my digi camera or figure out how to upload pics from my blackberry.

 

Ya, a golf ball almost goes down mine. I have yet to finish this runner, then i'm buying some 3 inch cutting discs for my dremel so I can siamese them an 1 1/2" into the runner. Should see a pretty responsive / quicker car come summer. When you find your camera id love to see some pics!

 

usually they cut the back off grind the insides down then reweld a new piece of alum on

 

Just for reference since i dont have pics,I siamesed the upper runner enough for me to stick my hand in all the way up to the last knuckles on my hand.My middle finger tip rests on the deepest point of my simesing or however you spell it.We removed a ton of material.Hopefully not too much,but we will know after we install.A couple of our carbide tiped shanks were about 4" long.
we removed much less material on the bottom of the runners.I measured the first one we liked,put in a gol ball and marked the golf ball with a sharpie.Then we matched each runner as close as possible.Best idea I could come up with.I know its not CNC or extude honed but,its far larger than the as cast slp runners i have.The base had a fair amount of material removed but not near as much as the upper runner.I think we greatly increased plenum volume and hopefully flow with the increase in area and the polishing.just hope no sealing issues.Will try to upload some pics off my BB now.

Please tell me if yall can view this pic from my blackberry.This is after we finished porting and bead blasted it.thanks!ok i will try some more since no replies and I can open it.BTW man it looks good in person after bead blasting.

 

a couple more.None of these are the finished product.more material was removed and polished up very nice.This is all the pics of runners i had on my BB.we also rounded them out much more but you get the idea.I will get more pics posted.I figured out how to take digi pics with my dvd recorder.Just have to get by my buddys house and take pics.MIKEMASSEY a board member spends most of his time on the LSX swap board as thats what hes putting in his GTA.Hes been a huge help,alot of fun and a great friend a met here on thirdgen just 10 miles away lol.Gotta love this site!

On the plenum we finished taking down all the restrictions ion the sides entering the runners.On the runners we did a lot more work.The part of the simeese in the middle top and bottom was almost flatened out but not quite,and as stated earlier we siamesed atleast 4" into the runners.All the way to my last middle knuckle and im right at 6`.No tiny burger king hands here lol.Updated pics soon I hope!

 

By the looks of the progress pics they look incredible. Die grinder or rotary tool? I think you should probably be safe, check out this website and look at his portwork on slps.
www.arkansaspolishing.com

 

Go my 200 sanding drums in the mail today, so now I can smooth out my ports. Just bought this baby off of eBay. It has a nice small handle that is the size of the collet so I should be able to do a "full" port job. Right now im about a centimeter away from that.
Here's the link for it :
http://cgi.ebay.ca/ws/eBayISAPI.dll?...=STRK:MEWNX:IT

 

OK,here are some near finishied pics.we still have some smoothing out and rounding out to do.We have polished.if you see something that looks like casting flash its the remnents of the glass beads from us bead blasting the outside.We had it loosely bolted together and took it apart fr a few quick pics.Still got a little work to do but here goes.

 

Ya, those are MASSIVE. I should be getting my new flex shaft in the mail soon. It has a smaller head so I can get that last cm done. Then once I siamese them i'll post a pic of the one runner that i've done. But man those are fricken insane, just smooth them out with sanding drums and theyll be damn nice!

 

more

 

Ya, just smooth them out, otherwise they look great.

 

Thanks for the compliments but i plan on hitting them with 120 sanding rolls and polishing them dont be afraid to hog luve ur work very precise!!

 

Thanks, I just think that since I dont need them for 2 more months may as well take my tim. Make it a real winter project vs a weekend. I have a glass blasting device as well, and when I'm done porting im going to chase my threads then glass blast them then spray some clear on top and cure it with a heat gun. I'm pretty excited.
Hey are you going to be hitting up a dyno with that set-up? I'd love to see how much it outflows stock.

 

We do have a dyno in town.I would really like to get a baseline with what I have now,then go back after the swap and a retune.Not sure if that will happen but....

 

Probably easily worth an extra 25rwhp

 

Anyone else have any comments on the shape or work done here.Good,bad or whatever.Just looking for feedback.thanks

 

Wow, nice looking stuff both you guys. Shady youve definitely put some time
on those runners! Looks great even though Im not a air physics genius like
Allen and the rest of the TPI guys.

Youve done all the hogging out you can, looks like all really needs
to be done is clean up and detail oriented work. I bet a difference
will be noticed as long as the rest of the motor can breathe!

 

Thanks.Just trying to figure out if the basic shape is ok or if i`ve done anything to impede flow.I hope its basically good cause we have put some time in it.Im hoping it helps it breath much better.Would love it to be a solid low 13 car once I add this and a good tune.

 

any supporting mods besides a tune?

 

Not sure if you were asking me,but if so check sig and or VB garage.As well as bosch III 24#/hr injectors.Sig is short list of main stuff.

 

i would take and open up the top of the SLPs and plenum more like it did! there is still porting that can be done with them! Looks good tho!
Here are a few pics of mine when i was workin on them to get an idea of what im talkin about!

 

Those are beautiful.

 

In the top picture on post 46 you need to open the runner entrance up a little more to get rid of the lip protruding into the plenum opening. The runner entrance should be the same or slightly larger than the plenum. Otherwise you are looking good.

 

The pics i posted are from 2006 back when i was workin on them. They still had a lot of port work done to them after those pics. Got excited and forgot to take pics of them befor i stuck them on the motor!
I just picked up an Accel Super Ram and will be startin to port that setup soon so i think my SLP setup will be for sale once i get the SR on this spring!

 

I've changed my mind about the edelbrock runners and if anybody wants them just shoot me an offer. Im just gonna go stealth ram