Brand new IR 2135 compressor isn't cutting it

Oct 19, 2018
56
8
woodland, wa
#1
any ideas on how big my compressor needs to be to use my air guns full capacity....how many gallons...psi...scfm@90. my HBT 8 gal. 5 scfm isn't cutting it and I don't want to buy another that doesn't either.
 

derekmac

TJ Addict
Feb 10, 2016
1,654
1,719
NS, Canada
#2
Are you using 3/8" or 1/4" air line? If it's 1/4", switch to 3/8". But, an 8 gal tank will run out of air very fast. A 5 scfm compressor would be OK for short blasts, but not continuous use, especially with a small tank.

I use a 30 gallon Husky (still only a 5.1 scfm at 90 psi), that also feeds a 20 gal slave tank. It works great for my impact, but a die grinder will drain it pretty fast.

This is the compressor I use: https://www.homedepot.com/p/Husky-3...table-Electric-Air-Compressor-C303H/206532808 I'd recommend one with a higher scfm though. Getting a higher output one generally requires a 220 outlet.
 

derekmac

TJ Addict
Feb 10, 2016
1,654
1,719
NS, Canada
#4
The 1/4" hose is restricting the gun. Think of it as trying to drink through a thin juice box straw compared to a big milkshake straw. You get much better flow with the bigger straw.

Also, if you want to run the tool at 90 psi, you should set the regulator while the tool is running.

More HP equals higher scfm, which will give better performance and quicker tank recovery. Generally ignore the HP ratings on big box store compressors though. A normal 15 amp house outlet "might" run a true 2 HP motor, if it's close to the breaker panel.
 

Rob5589

Certified video trained differential rebuilder
Supporting Member
Aug 29, 2016
5,795
5,343
W Sacramento, Kalifornia
#6
Like Derek said, 8 gal runs out too quick. My compressor has a 27 gal tank and runs about 6 cfm @ 90 psi and it runs out too quick at times.

Definitely check pressure while running tools. Hit the trigger and check the gauge. Mine is set at around 110 psi and drops to 90 while in use.
 

Jerry Bransford

TJ Guru
Supporting Member
Nov 9, 2015
8,261
9,239
Escondido California
#9
Switching your air line to 3/8" is likely what you need to do, 1/4" just can't flow as much volume as 3/8" can.

You don't need a 220v compressor to run even high CFM consuming air tools. I installed 220v in my garage for my welder but my 110v compressor runs my air tools using 3/8" air lines without problem and sometime nearly continuously like if I'm running a grinder or polisher without problem. Heck even my York a/c compressor I converted for use as an OBA compressor in my previous TJ ran my 1/2" IR double-anvil impact wrench on the trail or at the auto parts recycling yard without any problem whatsoever.

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OP
OP
gatertamer
Oct 19, 2018
56
8
woodland, wa
#10
again thanks...I think I learned to go with a bigger line...bigger tank...and scfm isn't that important....should I run my tool and at the same time set it to 90psi immediately or wait a sec?...the longer you hold the trigger the more the psi drops
 

Jerry Bransford

TJ Guru
Supporting Member
Nov 9, 2015
8,261
9,239
Escondido California
#12
again thanks...I think I learned to go with a bigger line...bigger tank...and scfm isn't that important....should I run my tool and at the same time set it to 90psi immediately or wait a sec?...the longer you hold the trigger the more the psi drops
SCFM is very important but your 5 SCFM should be plenty. Especially for a lower CFM consuming tool like an impact wrench. High CFM consuming tools are things like paint sprayers, polishers, grinders, etc.
 
Likes: gatertamer

Rob5589

Certified video trained differential rebuilder
Supporting Member
Aug 29, 2016
5,795
5,343
W Sacramento, Kalifornia
#13
again thanks...I think I learned to go with a bigger line...bigger tank...and scfm isn't that important....should I run my tool and at the same time set it to 90psi immediately or wait a sec?...the longer you hold the trigger the more the psi drops
I hit the trigger, watch the gauge, then adjust as needed. CFM is important but some tools use more than others. Air ratchet, die grinder, air chisel, use large volumes of air.
 
OP
OP
gatertamer
Oct 19, 2018
56
8
woodland, wa
#17
I guess i'm still missing something...I have 3/8 hose with 1/4 inch fittings, do I need 3/8 fittings on the hose?, and the 3/8 fittings don't fit my tools, do they make 3/8 that fit into the standard air tool openings?, or is there some sort of reducer (counterproductive)

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