Subliminal

Hey folks,

I have a 91.5 W250...I hear she's got the lagmaster turbo setup.

I'm wondering if there's a site that breaks down which turbos came on which trucks and which ones are good for what goals, etc...

I can see myself wanting some more performance in the future, but would like to know, say, if it'd be better to get a different turbo or to just replace the exhaust housing.

Anyway...thanks!

92smokin blacky

I think Holset.com has the map efficiency of Holset turboes if i remember right.

Astro

Your 91.5 most likely has a H1C with a 21cm2 turbine housing housing. Very laggy. Going to a smaller turbine housing like an 18 or 16 would be a quick upgrade that won't get the EGT's too hot and it'll spool quicker. Running a 12cm2 housing on a H1C will spool very fast, but will get hot quick because it doesn't push enough air. If you can find the 14cm2 turbine housing (they didn't come on Dodges, I forgot what they came from) they spool much quicker, but are large enough that you won't reach piston-melting exhaust gas temperatures the second you put your foot into it.

The first real upgrade I did when I had my ol '92 (RIP) was put a stock 2nd gen HX35 turbo with a 14cm2 turbine housing (they came with 12cm2 stock, but I had a 14 laying around). The downpipe flange was different than stock, but I made a new piece to adapt it. The rest of it bolts up. Made a huge difference in the truck's power and never ran hot EGT's. Eventually the truck got injectors, fuel pin, pump tweaks, and the turbo was upgraded further.

Here's the link you're looking for...
http://www.dodgeram.org/tech/dsl/FAQ/turbo_faq.htm

bariley

busses ring a bell... someone correct me if im wrong