Cutting down 181 DV's

[ShortBedCrew]

So im getting a set of 181 DV's from a member here and I want to make them 191's or 22's. I have the machine shop at my disposal so how much shoulder do I cut off?

__________________
1981 chevy 1 ton crewcab,shortbed, 95' CTD,HX35/ST50 twins,#100 plate, 15* timing, boost elbow,385 hp injectors, 4" exhaust, BHAF,3K gsk,SB clutch,8" lift,205tcase,4.11s,14r/60f both w/detroits,38"toyo MTs,18x10 chrome.SHES A BEAST!

[Chevy-Eater]

Originally Posted by ShortBedCrew

So im getting a set of 181 DV's from a member here and I want to make them 191's or 22's. I have the machine shop at my disposal so how much shoulder do I cut off?

IIRC 191's have a shoulder height of .030 and .022's are preatty self explanitory

__________________
94 regular cab 4x4, no plate, 90hp sticks, 191's, 2095 rack plug, 20* timing , Modded AFC, 5000gsk, Goerend Trans, Lockup switch, WH1C/HT60 Twins 34mm internal gate

[partyshortbusdriver]

Originally Posted by Chevy-Eater

IIRC 191's have a shoulder height of .030 and .022's are preatty self explanitory

im cutting mine down to .025", thats what weston recommended to me at least

__________________
Wisconsin Chapter Prez
97 Fiat 3500 Dually - 62/71/14 - 5x.012's - Rack Plug - AFC Mods - Ished Timing - Helix II - 5" Str8 Pipe - BHAF- No Plate - 4k GSK - 60# Springs - Auto to Manual Swap- Valair 500hp Clutch - 342,500 miles Soon to be SRW

[ShortBedCrew]

Great! Thanks guys.

__________________
1981 chevy 1 ton crewcab,shortbed, 95' CTD,HX35/ST50 twins,#100 plate, 15* timing, boost elbow,385 hp injectors, 4" exhaust, BHAF,3K gsk,SB clutch,8" lift,205tcase,4.11s,14r/60f both w/detroits,38"toyo MTs,18x10 chrome.SHES A BEAST!

[12valveterror]

probably a retarded question but if you cut these down yourself,will you still be able to use the stock retainer or holder whatever they call it, im just wondering what the difference is with the ones you get when you buy a set of dv's versus the ones.

__________________
97' 2500, 12Valve, 4x4, Auto, Dunrite Triple Disc T/C & V/B, Bilstein 5100 Shocks, DSS Stablizer, Dipricol Gauges, #0 Fuel Plate, 14cm Non-Wastegated Housing, KDP Killed, T/C Lockup Switch, 15* Timing, 2" Leveling Kit, 4" Turbo Back to 5" Mitres

[BradenAnders]

So would I be able to do this will my 131's as well?

__________________
1995 Auto 4x4, 100 plate, 3gsk, upgraded tranny, lockup switch, BHAF, KDP tabbed, guages, 4in TBE, and some leather seats from a 01.

[Dual K20s]

Originally Posted by 12valveterror

probably a retarded question but if you cut these down yourself,will you still be able to use the stock retainer or holder whatever they call it, im just wondering what the difference is with the ones you get when you buy a set of dv's versus the ones.

Originally Posted by BradenAnders

So would I be able to do this will my 131's as well?

Yes and yes. Make sure to cut the bottom edge and keep it as close to 90* as possible.

Factory parts are often made with other differences that may help flow but for the most part the shoulder is what most people worry about.

__________________
98 Dodge 2500 Motor: 12 valve, original 913 pump with the basics, some DDP parts, FASS, and more stuff then they will let me put here
Drivetrain: 5-speed 4x4 w/ SB OFE clutch (Love it!)

[YOUNG GUNS15]

hmm, looks like i just found my next mod, .025 DV's

should i get a bigger holder at the same time??

__________________
94' cummins 12 valve. lots of fuel and a crazy ___ year old
SPECIAL THANKS TO TOXIC DIESEL

[Dual K20s]

Originally Posted by YOUNG GUNS15

hmm, looks like i just found my next mod, .025 DV's

should i get a bigger holder at the same time??

No the holders are actually a valve and are fine the way they are. If you are talking about the seats, larger would not fit the dv.

[TheSh111t]

Originally Posted by ShortBedCrew

So im getting a set of 181 DV's from a member here and I want to make them 191's or 22's. I have the machine shop at my disposal so how much shoulder do I cut off?

What Dvs do you currently have installed? If you have a set of 131's, I personally would cut those and keep the 181's as they are. For 2 reasons. First, what if you make a mistake trying to turn them down. I personally don't think it could be that hard if you have access to a lathe, but what if. Secondly, what if you decide that the 022's or whatever you decide to cut, are too large (Smoke too much, get too hot ect.). At least in that case you could put in the 181's and still be a step ahead of your stock 131's. If I was gonig to cut something, I would cut the cheaper/lower perfomance set. In the end, there is no differance between a cut set of 131's and a cut set of 181's. They will both be 022's after you cut them. The only differance would be the seats, and if yo were that worried about it, you could cut the 131's and install them in the 181 seats. If you decide to go back, just take out the 022's and install the 181. Just my 2 cents.

__________________
1981 Chevy Short bed - Cummins swap Hoping for ~450 RWHP
1995 12v, NV4500, s362/s475 compounds, PDI manifold, #5 fuel plate, 181 Delivery valves,
5" turbo back, Mack plug, 60# springs, 4000 GSK, Timing @ 16*, 5x12 injectors.

[Dual K20s]

Originally Posted by TheSh111t

What Dvs do you currently have installed? If you have a set of 131's, I personally would cut those and keep the 181's as they are. For 2 reasons. First, what if you make a mistake trying to turn them down. I personally don't think it could be that hard if you have access to a lathe, but what if. Secondly, what if you decide that the 022's or whatever you decide to cut, are too large (Smoke too much, get too hot ect.). At least in that case you could put in the 181's and still be a step ahead of your stock 131's. If I was gonig to cut something, I would cut the cheaper/lower perfomance set. In the end, there is no differance between a cut set of 131's and a cut set of 181's. They will both be 022's after you cut them. The only differance would be the seats, and if yo were that worried about it, you could cut the 131's and install them in the 181 seats. If you decide to go back, just take out the 022's and install the 181. Just my 2 cents.

The 131's actually have a shorter shoulder than the 181's

[TheSh111t]

Originally Posted by Dual K20s

The 131's actually have a shorter shoulder than the 181's

What I'm saying is that he is going to cut a set of dv's. If he is going to cut them to a certain dimension (Let's just say .022 for the same of argument) what differance does it make what they started out as. I agree that the 131's have a differant seat. People have mixed 181 valves with 131 seats in the past but that is not the point I was trying to get at. I'm saying, why destroy a "High performance" set of 181 delivery valves, when he had cut his stock 131 valves and end up with the same setup in the end.

__________________
1981 Chevy Short bed - Cummins swap Hoping for ~450 RWHP
1995 12v, NV4500, s362/s475 compounds, PDI manifold, #5 fuel plate, 181 Delivery valves,
5" turbo back, Mack plug, 60# springs, 4000 GSK, Timing @ 16*, 5x12 injectors.