2008-2013 Cadillac CTS Performance Mods Discussion, 08 CTS AWD 3.6 DI Performance Mod Suggestions in Cadillac CTS Second Generation Forum - 2008-2013; Hi Everyone,
I just purchased a 2008 CTS AWD 3.6DI and want some suggestions for some modifications that will give ...
Not an expert but in reading about the 2nd gen car, I think I saw that the 6 sp auto is only rated for a couple dozen more hp's over 08 stock DI engine. Won't that be an limit on adding things like superchargers or turbos?
well it looks like I confused torque and HP numbers on the tranny....thanks...was going from memory. Still might be pushing my luck if I bumped it up to a little over 300. Which I would love to do. Supercharger sounds good... I think it would hold up for awhile but how long?
I may be getting too old for hot rods... I am starting to think about how long I can make cars last instead of how much power I can get out of it.
From Wiki also.
The 3.6 litre (3564 cc) LLT is a direct injected version based on the earlier LY7 engine. It was first unveiled in May 2006, and the DI version was claimed to have 15 percent greater power, 8 percent greater torque, and 3 percent better fuel economy than its port-injected counterpart. The LLT engine has a compression ratio of 11.4:1, and has been certified by the SAE to produce 302 horsepower (225 kW) at 6300 rpm and 272 lb·ft (369 N·m) of torque at 5200 rpm on regular unleaded (87 octane) gasoline. This engine debuted on the 2008 Cadillac STS and CTS. GM will use a LLT in all 2009 Lambda-derived crossover SUVs to allow class-leading fuel economy in light of the new Corporate Average Fuel Economy (CAFE) standards. In the Lambdas, LLT engine produces 288 horsepower (215 kW) and 270 lb·ft (366 N·m) of torque.
Year(s) Model Power Torque
2008–2011 Cadillac CTS 304 hp (227 kW) @ 6400 rpm 273 lb·ft (370 N·m) @ 5200 rpm
Do you have any posts about your exhaust? I have a 2009 AWD and I can't find an aftermarket exhaust for this car. KPE has a pretty cool sounding axle back, but its almost $1000, and I can't get any dyno tests out of them.
Glad im not the only one feeling the power woes. Had stage 3 legacy gt spec b before my 08 di awd as well,2.5 months later still getting use to the lack of zip
LOL I'm glad to see another (former) LGT'r here
My 05 LGT was stage 2, but blew up. I had been worried about it's oil consumption for a while and had brought it to no less than 3 mechanics regarding concerns about that issue.
Anyway, despite my vigilance, and strict 3000k oil changes, it died with 50k on the rebuilt motor, also the transmission was going, and I think it would need a new turbo soon (mechanic checked it and said it was fine, minimal shaft play, but they said the engine was fine to, and boom it went 3k after I had them look over it)
Ok so enough about the subaru legacy. I bought a RWD version and I do not have the DI engine. I think with powertrain loss and weight of the extra diff the awd DI and RWD non DI would likely feel similar in performance.
personally it feels about what my legacy wagon did stock.
I would love some input on weather some of the available mods for the DI engine would also produce some gains for the non DI, I know the spacer for the headers supposedly fits, but I havent heard if anyone has actually done it.
anyone with thoughts on the non DI version?
Non DI LY7 only have the iceolator and soon to be released CNC ported TB for HP gains. The DI LLT & LFX have turbo, twin turbo, centri SC, and top mount SC. and lots of other mods depending on the goals.