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Porting With an Electric Die Grinder

General engine tech -- Drag Racing to Circle Track

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Porting With an Electric Die Grinder

Post by BOOT »

Well can't say I'm super impressed so far, compared to having always used air grinders but it's still early and I'll deff get some use out of this electric die grinder. https://youtu.be/4QlAn0-1-kU

What ones do you guys prefer?
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Re: Porting With an Electric Die Grinder

Post by BillK »

I have a Makita like the one in the video but to be honest with you I dont do that much "porting" A little port matching for gaskets and blending when installing larger valves but thats about it. My Makita is probably 30 years old and still going strong :)
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Re: Porting With an Electric Die Grinder

Post by KnightEngines »

I don't get along with electric, tried a couple of times.
I vary the speed constantly, electric can't do that.
Plus they're bulky & heavy, no good for 8hr porting sessions.
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Re: Porting With an Electric Die Grinder

Post by Coloradoracer »

I like air tools for that....just easier to control IMHO.....and smaller too....
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Re: Porting With an Electric Die Grinder

Post by mt-engines »

FOREDOM Flexible Shaft Grinder with a foot pedal. Air is too noisy.
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Re: Porting With an Electric Die Grinder

Post by BLSTIC »

I used a Makita *Battery* one for a turbo adapter. The nature of the tools available to me at the time meant I had to go from a 38mm hole to a T3 flange, twice.

3/10 Would not recommend. Car went really fast though...
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Re: Porting With an Electric Die Grinder

Post by FC-Pilot »

mt-engines wrote: Sun Sep 12, 2021 8:07 pm FOREDOM Flexible Shaft Grinder with a foot pedal. Air is too noisy.
I like using a foot pedal as well, but I use it with a makita grinder. That way I have the speed controllability along with the power of the bigger grinder. I am just a hobby guy, so I am only using it maybe five weekends a year on average.

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Re: Porting With an Electric Die Grinder

Post by BOOT »

KnightEngines wrote: Sun Sep 12, 2021 7:33 pm I don't get along with electric, tried a couple of times.
I vary the speed constantly, electric can't do that.
Plus they're bulky & heavy, no good for 8hr porting sessions.
Yah I did notice it seemed to be harder on my hands, prob because it's running more compared to letting off the air grinder lever.
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Re: Porting With an Electric Die Grinder

Post by steve cowan »

i started out a few years ago with big bosch electric,no foot peddle,they are heavy and when a long mandrel bends at 90 degrees things go pear shaped pretty quick.
i like air but have to consider noise for my neighbours.
i bought a 18v milwaukee set up that i like,nice and light and has enough juice for a hobby guy like myself.not sure how they would go 8 hrs a day??
biggest thing i learn't is buy the best burrs you can afford as this makes the difference in my opinion.
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Re: Porting With an Electric Die Grinder

Post by SupStk »

I have several of the GEO660 (think that's the number) Makita die grinders. Usually set each up with its own burr. Lots rather run them than a 7.5 hp compressor when grinding for hours at at a time. Also have five air power grinders that get used when necessary.
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Re: Porting With an Electric Die Grinder

Post by BOOT »

steve cowan wrote: Mon Sep 13, 2021 2:46 am i started out a few years ago with big bosch electric,no foot peddle,they are heavy and when a long mandrel bends at 90 degrees things go pear shaped pretty quick.
i like air but have to consider noise for my neighbours.
i bought a 18v milwaukee set up that i like,nice and light and has enough juice for a hobby guy like myself.not sure how they would go 8 hrs a day??
biggest thing i learn't is buy the best burrs you can afford as this makes the difference in my opinion.
That's why I'm thinking bout trying a paddle switch unit for the larger die grinder. Also same if I can't sleep and wanna grind late at night, a few electric grinders are cheaper than a screw compressor. Well at least they are worth trying out before I pony up the money for one.
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Re: Porting With an Electric Die Grinder

Post by EDC »

Two speed controllers wired in series.

Works great.
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Re: Porting With an Electric Die Grinder

Post by Momus »

I have a Makita electric as mentioned, and air grinders.

I also use the $30 or so Dremel copy mains power tools.

These are excellent for motorcycle sized work with 3mm/1/8" burrs.
If you get one of these check the collet material: steel is a lot more durable than brass.
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Re: Porting With an Electric Die Grinder

Post by cpmotors »

I have a pair of Makita GDO601 I run WFO @25k I use for the majority of my work.
Finish detail and polish work with air.
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Re: Porting With an Electric Die Grinder

Post by hoodeng »

Different stuff for different guys,,, some are on the grinder for a lot of hours and some are not, some have difficult stock to remove some don't.
I pretty much only do alloy, four ports is the job run. I used air for years but the refrigerant effect on my hands got to be unsustainable.[not to mention my ears] I also replaced my compressor with a Chicago Silenced, the unloader is louder than the compressor.

I went first for a Makita GD0800C direct drive, great for linishing but a bit too quick for alloy cut carbides, i then got a Makita GD0810C reduction drive, this covers the hogging work very well. Both have built in rotary speed controllers in the butt, speed can be changed on the fly, mine both have latching on/off switches late collet chucks are better than the earlier types.
In that video the guy showed a number of carbides that had runout, he could have trued the ones that can be bumped back into line.
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