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by **garywj** » Wed Feb 06, 2008 8:54 pm

Thanks for the info on the valve adjustment. My truck has 200,025 miles on it and I wonder if it has ever been adjusted before. After adjusting the valves, I turned the fuel screw up about a turn and a half. WOW!!! It runs way better now. More power, sooner. :lol:

It seems to idle a little fast now, but I can see the power potential these engines have. My question is, leaving everything else stock. Would a smaller turbo housing be of any benefit? Also, would replacing my stock muffler with strait pipe help? Thanks for all your help!

by **Philip** » Wed Feb 06, 2008 11:10 pm

Going to a 16cm housing from the 21cm it came with would be a good inprovement.

I didn't see any gains when I droped the muffler on the stock 3" system. All it did was add noise.

Now going to a 4" system is another matter. It gives better spool up on the turbo and lower EGT's. That is another good upgrade.

by **ford69557ci** » Thu Feb 07, 2008 12:47 am

droppin the muffler may not add any power but it will drop the egt a little. if your an auto the 16cm will be ok but if your a manual then you will get better results out of the 14cm

by **cummins king** » Thu Feb 07, 2008 6:20 am

you will realy love the housing upgrade, theres no benifit for removing muffler, unless you running bigger injectors

by **Rug_Trucker** » Fri Apr 04, 2008 9:46 am

So no muffler on my stock 93 will not help?

by **cummins king** » Fri Apr 04, 2008 11:13 am

no just more noise

by **dpuckett** » Sat Apr 05, 2008 4:26 pm

I liked the 16 out of all of them that I have run (12-21), and I have had them all at one point or another. The 14 was just a little too restrictive- going to a ported 18 didnt change EGT at all, just dropped peak boost about 3-4psi.

I have had some trucks where removing the muffler seemed to help; others, not so much. It wont hurt anything. Going to a 4" system will help EGTs if you throw too much fuel at it- good for about 100deg reduction in peak EGt.

Daniel

by **mhuppertz** » Thu Apr 17, 2008 6:15 pm

Rug_Trucker wrote:So no muffler on my stock 93 will not help?

Saw the '72 Slant Sickness Duster in your sig. I have a hot 225 that I am looking for a fairly clean Duster body to jamb it into. Deisel prices are making me only break even now....

by **Rug_Trucker** » Fri Apr 18, 2008 6:07 am

mhuppertz wrote:
Rug_Trucker wrote:So no muffler on my stock 93 will not help?

Saw the '72 Slant Sickness Duster in your sig. I have a hot 225 that I am looking for a fairly clean Duster body to jamb it into. Deisel prices are making me only break even now....

Check Desert Valley auto parts. They sometimes have some nice ones.

I have a rusty 74 that may get a 360 for commuting.

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Valve adjustment, power changes

Valve adjustment, power changes

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