As I have installed a SR base manifold I am now planing on porting the stock one that was left over. I do have a dremel but what else is needed to port my intake. And what is the best way to get the most power out of the port job (ex. siamese). How much power can a ported stock intake support. Thanks for the help guys. :D

 

Dremel won't get the job done. Tell me, is the intake aluminum or iron? That makes a big difference. Having done porting of things before, I would suggest using an air dye, followed by a dremel with a sanding wheel (not the little discs that come with the Dremel, the kind that have a round piece of plastic with a bunch of individual pieces of sandpaper coming out of it, like a flower) attached. That'll smooth it out, then you have to get in there and hand wetsand it with some really fine stuff. I wouldn't try it, but you're welcome to do so. IM me if you have any questions. :cheers:


[Modified by GDP, 4:35 AM 6/10/2003]

 

Moving to Tech/Performance Section....
~ Purp

 

read this carefully
the best results I got when useing a TRUE TPI were with a ported EDELBROCK base, PORTED and siamesed SLP runners and a ported plenum, siameseing the base lost tq , yes its possiable to raise the rpm level the engine runs at by siameseing the base but the cars not quicker,the SUPER RAM and CUSTOM STEALTH RAM both out flow and out perform the ported TPI, the SUPER RAM flows about 245cfm untouched the STEATH RAM flows about 275cfm untouched both can be improved about 25cfm with port work. the standard or ported TPI is designed to work best in about the 1000-4000rpm range, with cams in the 205-220 @.050 range, the super ram in the 2000rpm-5500rpm range with cams in the 210-225 @.050 range and the stealth ram in the 4000-6500rpm range with cams in the 220-240@.050 range
http://www.eecis.udel.edu/~davis/z28/buildup/plenum/
http://www.geocities.com/softtailduece01/
http://www.eecis.udel.edu/~davis/z28...age021105.html

you really need a cam upgrade and at least minimal head porting or aftermarket heads to take full advantage of the higher flow rates the super ram and stealth ram provide, rear gear changes to gears in the 3.73-4.11 range help keep your engine in the higher rpm ranges where the aftermarket intakes can provide thier full benefit
engines are a system, REQUIREING ALL PARTS MATCH THE INTENDED RPM RANGE AND AIR FLOW LEVELS FOR BEST PERFORMMANCE, if you keep the idea that an engine combo is only as strong as the weakest link firmly in mind youll have a better combo! THE STOCK TPI intake is extremely restrictive, almost any mods help. BUT keep in mind chevy designed that TPI intake for the under 4000rpm range where your car spends 80% of its time ,not as an intake for max HP,you can get large gains in hp with a change of parts to match the 4000-6500rpm range but you will loose some low rpm tq in the trade for much higher hp

heres a few things to read http://www.idavette.net/hib/camcon.htm
http://victorylibrary.com/mopar/cam-tech-c.htm
http://www.69mustang.com/hp_torque.htm
http://www.ryanscarpage.50megs.com/combos1.html

notice all the better hp engines are running better flowing heads and cams with 225 plus duration

the formula for HP is (tq x rpm /5252=hp)
so if your stock TPI makes 330ft lbs at 3800rpm that equals 238hp
but add 50 ft lbs of tq due to better airflow and/or larger displacement and design the engine and gearing to run at 4800rpm and youll have
380ft lbs x 4800rpm/5252=347hp thats over a hundred hp increase!


[Modified by grumpyvette, 4:59 PM 6/10/2003]

 

grumpyvette

The intake I want to port will probably end up on a truck hopefully an s-10.

Here are the mods I have done to my car.

Rebuilt Trans.
2200 TC
SR base manifod
Chambered Exhaust

Mods that willl come in order.

hooker headers 2149
SR upper
219 cam
3.33 gears

I am porting the intake this early because I am really board.

Will a dremal get the job done because I do not have a compressor
:nonod:

Thanks for the info

 

Dremel will work ok on aluminum. You'll need one of those flexible extensions for it of course. Use those hardened steel bits for hogging out stuff and gasket matching.

While porting my plenum, the dremel was overheating... so take your time and let it cool down. I'm not sure if they make those sanding flaps for a dremel though.

 

A dremel WILL work. That's what I had to work with. I also used a 2500rpm power drill and a 2in. sanding flap disk for polishing. For the dremel I used a carbide cuting bit for the actual porting. It takes time and a steady hand but it's definitely doable. Here are my superram plenum and runners I porting. I think they turned out awesome!