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-   -   questions about the 6.5 TD (https://www.dieselbombers.com/chevy-gmc-6-2l-6-5l/114622-questions-about-6-5-td.html)

brandon1481 08-17-2013 12:04 PM

questions about the 6.5 TD
 
i just bought a 1998 2500 6.5. 180k on body and 80k on the motor. everything is pretty much stock. ive noticed that you cant here the turbo. would buying a 4 inch straight pipe exhaust and an afe stage 2 intake help the turbo sound louder? or anything else help. also would a 15 inch rim fit onto the truck? or is 16 inch the lowest?

bergs 08-17-2013 09:43 PM

I have 15" with 35's on my 98 and the 4 inch exhaust straight back from the turbo and u get a very nice whistle :rocking:

TheyCallMeCountry 08-18-2013 12:40 AM


Originally Posted by bergs (Post 1021973)
I have 15" with 35's on my 98 and the 4 inch exhaust straight back from the turbo and u get a very nice whistle :rocking:

I don't see how that can effect your turbo noise but okay.

Back to you, 5" MBRP Turbo back. Remove the plastic elbow on the turbo that goes nowhere and replace it with a rubber freeze plug, add a cold air intake. More noise.

brandon1481 08-19-2013 10:18 PM

the bigger exhaust lets there be more room for air to come out so thats understandable. i was wondering about the 15 inch rim is cause i have a nice set of tires with 15 inch rim and i heard they didnt fit. did you have to grind anything?

bergs 08-19-2013 10:31 PM

if its 8 stud yes on the back side of the caliper it rubs pretty bad(or did on my old truck) 6 stud no they will bolt right up

brandon1481 08-20-2013 12:58 PM

dang. yeah this is a 8 lug. right now im looking into ss diesels performance package for a 6.5. hopefully that wakes up the motor a little

zugzub 08-20-2013 06:57 PM

There is such a thing as to big of an exhaust. The pipes need to be warm, same effect as flow on a wood burner. The warm pipes help to draw the exhaust out. If you can grab your exhaust and hang onto it immediately after working it hard, your pipes are too big

brandon1481 08-20-2013 08:50 PM

i was just looking for a 4 inch stright pipe. i thought a 5 inch was too big anyways

dieselburb 08-21-2013 01:05 AM

honestly I'd save your money I have a 98 2500 6.5 suburban and I've done my research pretty much anything that you add to that motor (air intake custom exhaust bigger turbo even chiped ect) won't gain much horsepower or torque. the 6.5 is just an excuse to own a diesel. one thing that might help you get more life out of that motor is adding an electric fan to the already crapy cooling system as 6.5s love to overheat

Mase 08-21-2013 05:28 PM

The 4" exhaust will make a difference.You will here your turbo better and I even raised my MPG.:rocking:


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