Engine/Transmission (1998.5 - 2002) Turbo Port and Polish

[BSKI]

My CTD has a HY35 and according to dodgeram. or it chokes at 29 PSI. My buddy just upgraded to a 14Cm and has the stock HX 35 which according to dodgeram.org chokes at 35 PSI. I have read something about "porting and polishing" the TURBO.



Has anyone done this and achieved worthwhile results?

Anyone know a good website to reference the procedure?

Do you think effort would be worth the results..... free! no cost?



99 Ram 2500, automatic, installing jammer 2's, 4"hog exhaust, proguard intake, boost fooler, boost elbow and superchip programmer.

 

[DieselTweaker]

well,,



I can tell you anytime you do any port & polishing work it takes a lot of time and patience, but a quality job will offer some very good results, and I can't stress the patiences enough, on a turbo all you'll want to do is polish on the comp side, and the exh side you could do some port matching work where the turbo and manifold meet, I've done some port and polishing work on my own stuff and others and I totally understand why people charge so much to do it, and I wont do it for just anyone, I highly recommend a good DIE GRINDER, FACE MASK, AND SOME EAR PLUGS HELP TOO.



here is a good site, I use them and love it, good products and nice starter kits

also they have a little how too info. http://www.sa-motorsports.com/







here is a pic of an intake that I worked on, I dont have any pic's of the heads I wanst thinking,,,



If you need a hand or what ever feel free to PM me



Zach



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[jerrethomas]

the intake on my cummins doesn't look anything like that. What cummins do you have? LOL :-laf

 

[DieselTweaker]

LOL, I can't let out all my secrets



That's off my other toy/money pit 90lx mustang, that's a little 347 stroker motor that's around 430hp with out any drugs,,,, not sure how big of shot im going to give it.



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[woodsrat]

hopefully buy the time the truck is done I will have to drag that mustang to the pulls to use as a pony motor (pun intended) to start the truck.

 

[Joseph Donnelly]

I've told this story before, but here goes. . .

Mark Chapple (TST) spent 12 years of his time with Cummins (33 years total) in turbo development. He told me every year they got in a crop of new engineers and sure as could be, one of them would spend a day or two porting and polishing a turbine housing. Upon dyno testing, driveability testing, etc. , NO DIFFERENCE.



Shouldn't be surprising, as you aren't changing the size or shape where it counts. If you want bigger, they are available for the HX35. HY owners are out of luck, but the turbo is otherwise limited anyway.

 

[MLeppen]

My CTD has a HY35 and according to dodgeram. or it chokes at 29 PSI. My buddy just upgraded to a 14Cm and has the stock HX 35 which according to dodgeram.org chokes at 35 PSI. I have read something about "porting and polishing" the TURBO.



Has anyone done this and achieved worthwhile results?

Anyone know a good website to reference the procedure?

Do you think effort would be worth the results..... free! no cost?



99 Ram 2500, automatic, installing jammer 2's, 4"hog exhaust, proguard intake, boost fooler, boost elbow and superchip programmer.

Your signature says you have a 99 CTD, that should have a HX35 not a HY35

 

[darkhorse]

My CTD has a HY35 and according to dodgeram. or it chokes at 29 PSI. My buddy just upgraded to a 14Cm and has the stock HX 35 which according to dodgeram.org chokes at 35 PSI. I have read something about "porting and polishing" the TURBO.



Has anyone done this and achieved worthwhile results?

Anyone know a good website to reference the procedure?

Do you think effort would be worth the results..... free! no cost?



99 Ram 2500, automatic, installing jammer 2's, 4"hog exhaust, proguard intake, boost fooler, boost elbow and superchip programmer.

Try this thread.



http://www.nwbombers.com/cgi-bin/forum/ikonboard.cgi?;act=ST;f=3;t=5406

 

[BSKI]

MLeppen,



Misread the info, the HY / HX variance took place in 2001 / 2002 trucks.



DARKHORSE



thanks

 

[02cummins]

hy35 upgade

Need some info here, I installed a tst stage two and have to back off the throttle egt spikes to 1300 preturbo unloaded flat ground. I have been reading the hy35 turbo has a 9cm housing is there any uprade?I think its a little choked. stock exhaust muffler delete. 2002,qc,4x4,lwb,47re,3. 54 lsd,2"leveling kit, snug top shell,two tone white silver,tow package, banks highram, muffler delete,stock airbox w/k&n,tst stage 2,triple pod boost,egt,trans temp,paid for, silincer ring mia

 

[Hohn]

I did some grinding on my 12cm housing and my manifold. I opened up the flanges on each (note the big hump in the one corner.



While I *WAS* able to increase the volume of my turbine housing, I couldn't modify the area that counts-- the point where it discharges into the turbine wheel. Thus, I increased the volume of the housing, but it's still 12cm, as that biggest bottleneck in the housing is still the same.



One other thing I modded was the wastegate. I opened up the WG hole as large as I could and still have the flapper seal. I also chamfered the edge to ease the transition some. Finally, I drilled a hole in the scroll divider so that the WG can vent all 6 cylinders, not just 4, 5, and 6.



Results were a little less spoolup (barely noticeable), a smoother feeling engine (less thump under load) and 100° EGT drop. EDIT: Oh, my peak boost stayed the same too. I figure if peak boost stays the same while I dropped some EGT, then it probably was good.



I'm not sure If I would do it again. I really like the way it is now, so I probably WOULD do it again.



I used an air die grinder and some carbide burrs and sanding cartridges from Eastwood.



Justin

 

[Beast2B]

02cummins, piersdiesel does some work to make a better HY turbo, maybe others do too. You can also play with your wastegate to keep the boost under ~32# boost. More than that with an HY and you're starting to super-heat the intake charge and you're losing power! If your wastegate is completely disabled, you're making way too much boost. Make it adjusable with a spring or linkage mod and keep the turbo near its efficiency map.

 

[02cummins]

beast2b thanks for the reply. tst sent me a spring linkage for the waste gate since the wast gate has a hard line attached to it. my boost goes to about 34 psi. also I checked out your pics very nice truck I like the stance tires don't look all balloney looking. I like it.

 

[Beast2B]

thanks, my only gripe with the wheels/tires is towing heavy. between the tall sidewalls and the narrower wheel I get some flex laterally, but horsepower and 'cool factor' make up for that in my book!

If you can adjust the wastegate with the spring linkage, find a quiet road (prefer an incline) and make some runs with the max boost at diff settings. You'll be surprised at how much you can control the EGTs.

 

[NVR FNSH]

I've told this story before, but here goes. . .

Mark Chapple (TST) spent 12 years of his time with Cummins (33 years total) in turbo development. He told me every year they got in a crop of new engineers and sure as could be, one of them would spend a day or two porting and polishing a turbine housing. Upon dyno testing, driveability testing, etc. , NO DIFFERENCE.



Shouldn't be surprising, as you aren't changing the size or shape where it counts. If you want bigger, they are available for the HX35. HY owners are out of luck, but the turbo is otherwise limited anyway.

I've said this before in response to the above post from Joe. I was one of those 'new engineers' at Garrett and I tested turbo's that had been extrude honed on the compressor side. Absolutely no difference in performance. 'Port' matching will almost always reap some benefit but don't waste your time inside the scroll.



Brian

 

[RacinDuallie]

I've said this before in response to the above post from Joe. I was one of those 'new engineers' at Garrett and I tested turbo's that had been extrude honed on the compressor side. Absolutely no difference in performance. 'Port' matching will almost always reap some benefit but don't waste your time inside the scroll.



Brian

Nothing like a good gasket matching on the flange side, helps when your cramming that air into the turbine!