New vee clamp, less power

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Well i fixed an exhaust leak today;
the flange on my vee clamp between the down pipe and the hot-side turbo housing was leaking exhaust, so i called around looking for this clamp... ended up picking one up from Chrysler
today changed clamps, now it seems that i dont have the suck you back in the seat oomph i had while it was leaking... I cant verify any of this cuz i dont have a boost gauge yet. My thought was maybe that little leak let off enought backpressure to let the turbo spool up quicker... sound right??

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1990 w-250 4x4 cummins 5. 9,NV4500,tweaked injection pump, 16cm2 turbo exhaust housing, 205hp 550ft-lbs to the rear wheels and a 4. 10 rear end

 

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joesoot do you still have the stock exhaust system. They create a lot of back pressure.
Gene
92 350 4x4

 

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Hey Joe, I think you might be right. My truck is straight piped and one time (when I first rigged it on there) my exhaust brake popped the whole exhaust system off from around the transfer case back! (luckily I had the brake safety chained) It seemed like it spooled up really quick with less than 5 feet of exhaust system #ad
Your leak, being that close to the turbo, may have let it spool quicker. Like Gene says (do I always post after you Gene?) if you still have the stock exhaust system (and that worthless tin can) under your truck-----replace it with an aftermarket system, or at least put that can in the basement! This makes a good difference. You could also do 5" straight stacks like I'm in the process of doing #ad
unless your not a redneck hillbilly like me #ad


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Mine: '93 250 LE 4x4 5spd 4:10 Pwr win/loc/mir,cruise,dual 5" chrome stacks,12cm2 turbo,pyro/boost,diamond plate tool box, CB, 16x10" AR rims, 285/75/16 Bf goodrich, US Gear E-Brake,Fuller Roadranger shifter, PW injectors, K&N. "wirenut_21529" on Yahoo Messenger
Moms:'96 Ford B-Series school bus (5. 9 Cummins!)I'm gonna Bomb it!
Dads:'94 GMC 2500 6. 5L Turbo

 

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Well ive been thinkin about callin jardine for 3. 5" cat back... unless you guys have any other suggestions for a new exhaust... who, what where... etc????
hint... hint

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1990 w-250 4x4 cummins 5. 9,NV4500,tweaked injection pump, 16cm2 turbo exhaust housing, 205hp 550ft-lbs to the rear wheels and a 4. 10 rear end

 

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joesoot,
I just got a down pipe to tail pipe system, including muffler, from Ted Jannetty. It is a 3" mandrel bent system that replaces the factory one (same size but with out the restrictions). It was less than half of what other companies wanted for an extra 1/2". It sounds great and I have faster spool up of the turbo.


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90 W250, 5-speed, isspro gauges, 16 cm2, K&N, Borgeson shaft

 

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Hey Joesoot!

I've also been shopping around for an First Generation exhaust for a friend's '93 W250 CC that is being purchased in California next week (TDR Classifieds).

I have the Banks mandrel bent 3" to 3 1/2" exhaust on my truck and have replaced their huge, quiet muffler with the Walker #21468 on mine. My girlfriends '92 W250 is also set up identically. Good exhaust system but you have to order it with their muffler and then not utilize it if you want a Walker. They tend to be expensive when compared to the JRE or BD products.

BD offers a mandrel bent 3" to 3 1/2" system for $400. 00 that goes to 3 1/2" before the muffler gives you more 3 1/2" total length for the system. They use a muffler built locally but it is similar to the Walker design being a perforated core - straight through design. I don't know about the sound or durability but if BD is selling it I'm sure it's good!

I talked with Ted (JRE) yesterday about his 3" mandrel bent exhaust system that utilizes the proper Walker and complete hardware & hangers for $300. 00. He mentioned that there isn't much performance differences between the 3" vs 3 1/2" on our First Gen trucks. Joe Donnelly has also confirmed this with his experiences and dyno testing.

I begining to think I might follow "Matt S" lead and go JRE for $300. 00! Kind of sounds like Jeaprody! "Alex, I'll take JRE for $300. 00!"

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1992 W250 5spd. 3. 54 gears, LSD, JRE enhanced VE Injector Pump, BD High Output Injectors, Banks "Stinger Plus" consisting of a replaced 12cm2 wastegated housing, 3 1/2" JRE modified exhaust/muffler, pyro/boost gages, K&N, Skyjacker 2 1/2" front suspension lift to clear 305/70R/16 Goodyear MT's, Mag-Hytec, Amsoil, Rhino liner, Fully Chrominated Aluminum Aftermarket Accessory T-handle Shift Knob

 

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Hey Joesoot!

I read you posting again and wanted to mention that all of these systems are complete "turbo to tail" systems and not CAT back.

Are you sure that you have a CAT on your 1990?
Chrysler wasn't required to use CAT's on the '89 to '93's!

Keeno

[This message has been edited by KEENO (edited 09-13-2000). ]

 

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Originally posted by KEENO:
Hey Joesoot!

I read you posting again and wanted to mention that all of these systems are complete "turbo to tail" systems and not CAT back.

Are you sure that you have a CAT on your 1990?
Chrysler wasn't required to use CAT's on the '89 to '93's!

Keeno

[This message has been edited by KEENO (edited 09-13-2000). ]

Doesn't have a cat... just used the term to
refer to the muffler tailpipe package... im gonn search for Joseph Donnelly post on the 3' system...
might call JRE too thanx guys!!


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1990 w-250 4x4 cummins 5. 9,NV4500,tweaked injection pump, 16cm2 turbo exhaust housing, 205hp 550ft-lbs to the rear wheels and a 4. 10 rear end

 

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I don't remmber where my old posts on 3" might be, but you can go to the TDR homepage and check my featured article air+fuel=power for some info. Basically, at 380 hp on the Dynojet, going from 3" with the Walker to 4" with no muffler gained only 7 hp.