241 heads, porting question
241 heads, porting question my question is about the ramp... do i remove it all together (seems kinda drastic)? Do just remove half of it? do i just shape it a little better? i know some people just sort of clean it up with cartridge rollers while others totally remove it,,,, posted some pics
Uploaded with ImageShack.us stock intake
Uploaded with ImageShack.us
Uploaded with ImageShack.us
i didnt do very much work on these yet,,, just slimmed down the guide boss, removed some of the ramp and tried to blend the drop off a tiny bit. should i take more of the ramp out? seems like my dual valve springs sit right above the ramp. any tips are appreciated,,, thank you
Uploaded with ImageShack.us stock intake
Uploaded with ImageShack.us
Uploaded with ImageShack.us
i didnt do very much work on these yet,,, just slimmed down the guide boss, removed some of the ramp and tried to blend the drop off a tiny bit. should i take more of the ramp out? seems like my dual valve springs sit right above the ramp. any tips are appreciated,,, thank you
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Remove it! and make sure you take out the rocker stud lump too. I just got done learning this process. After doing that and gasket matching teh exhaust my 853's are easily outflowing 243's. I'd post pics and flow sheet but im not at home.
would i see a big power diff with 2.02 vs 2.00 valves?
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Here is an awesome thread i learned a lot from. Mike is a good knowledgeable guy.
https://ls1tech.com/forums/generatio...6k-beware.html
https://ls1tech.com/forums/generatio...6k-beware.html
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a mini air die grinder, carbide cutter bit (tree shape works best), some sand paper rollers (standard abrasives makes a good kit). that's about it. i wear a quality respirator and sealed safety goggles oh and a couple flashlights,,, its fun
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Verdad Gallardo Here is an awesome thread
https://ls1tech.com/forums/generatio...6k-beware.html
https://ls1tech.com/forums/generatio...6k-beware.html
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don't buy a cheap cutter!!!! a cheap carbide cutter will give you cheap carbide cutter results and will dull as soon as you start to use it, i think i paid $46 bucks for my longer 6" cutter. you really need two cutters a long 6-8" and a short 3-4 inch cutter. I like the 3/8" diameter tree shaped cutters. I buy most of my stuff from http://www.ruffstuff.com/. good mom and pop company and decent prices...
not to sure how much time i have into the heads... maybe 20 hours
not to sure how much time i have into the heads... maybe 20 hours
Last edited by 3rdCoastPowerSports; Sep 13, 2011 at 11:41 AM.
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don't buy a cheap cutter!!!! a cheap carbide cutter will give you cheap carbide cutter results and will dull as soon as you start to use it, i think i paid $46 bucks for my longer 6" cutter. you really need two cutters a long 6-8" and a short 3-4 inch cutter. I like the 3/8" diameter tree shaped cutters. I buy most of my stuff from http://www.ruffstuff.com/. good mom and pop company and decent prices...
For a grinder though, my 21g air compressor couldnt take it. I even read where a lot of shope compressors cant take the constant use of an air grinder. I tried a electric die grinder, but I quickly learned that you need a low rpm grinder (about 7-15k rpm). Electric die grinders to me where too bulky and awkward, but a lot of people seem to take that route. I shopped and googled around. What I wound up choosing and am currently preparing to order is a Foredom TXH-440 Industrial Flex Shaft. Heres the link.
http://www.ottofrei.com/store/produc...at=3394&page=1
Its not cheap, but I think it'll do an awesome job. I was able to borrow the non industrail version of this from my neighbor and it is nice not having to hold the grinder with two hands.
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One thing I want to try differently on my next head is to leave the material between the valve guide and the close side port wall. The area on the bottom side of the valve guide in our photos or underneath. I noticed after looking at many other ported and CNC'd heads that they all left materail there. Like a tail wing. As you can see in mine I took in down to a saddle.
I also didnt touch the short turn radius beside polishing it. I belive this is an improtant area I missed.
I also didnt touch the short turn radius beside polishing it. I belive this is an improtant area I missed.
Also just as a general FYI most professional head porters use electric grinders.
what exactly is meant by the short turn radius???? (what is the short turn radius)
here is a pic of intake port with the bolt hump removed,,, i've decided to keep the ramp... i have seen some people make good flow numbers and lay down the power leaven some of the ramp in,,, so im going to leave it in this time
Uploaded with ImageShack.us
also what kind of epoxy do you use to cake in the hole before you put the bolt in???
here is a pic of intake port with the bolt hump removed,,, i've decided to keep the ramp... i have seen some people make good flow numbers and lay down the power leaven some of the ramp in,,, so im going to leave it in this time
Uploaded with ImageShack.us
also what kind of epoxy do you use to cake in the hole before you put the bolt in???
what exactly is meant by the short turn radius???? (what is the short turn radius)
here is a pic of intake port with the bolt hump removed,,, i've decided to keep the ramp... i have seen some people make good flow numbers and lay down the power leaven some of the ramp in,,, so im going to leave it in this time
Uploaded with ImageShack.us
also what kind of epoxy do you use to cake in the hole before you put the bolt in???
here is a pic of intake port with the bolt hump removed,,, i've decided to keep the ramp... i have seen some people make good flow numbers and lay down the power leaven some of the ramp in,,, so im going to leave it in this time
Uploaded with ImageShack.us
also what kind of epoxy do you use to cake in the hole before you put the bolt in???
For the rocker bolt hole just put some ARP thread sealer or equivalent on the rocker bolt threads before threading them into the head.
Another thing you should pay attention to is the throat % after you've done your VJ.
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here is a pic of intake port with the bolt hump removed,,, i've decided to keep the ramp... i have seen some people make good flow numbers and lay down the power leaven some of the ramp in,,, so im going to leave it in this time
Uploaded with ImageShack.us
Uploaded with ImageShack.us
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Thank you very much JS01! I'm saving this. It'll help with future explanations. I wish I had come across that when i was trying to figure out what all that was.
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Very important area you can pick up alot of CFM/HP here, you have to be careful on 241's though as they're very touchy on the short turn. Take out too much and they go turbulant in a hurry. I wouldn't mess with the short turn much unless you have flowbench access.
Also just as a general FYI most professional head porters use electric grinders.
Also just as a general FYI most professional head porters use electric grinders.
And thanks for the info on the most common tool used. I'm probably going to change my purchase dependent on that. And also the fact that thats what CHA sells for head porting and thats what their business is based on.