Turbo lag on CRD .. can one improve the response

[Watty]

All CRD owners are aware of the so-called “turbo lag” issue that is experienced during acceleration. My question is very simple. Can the lag period, or seconds waited before the turbo kicks in and give the much wanted compression needed for the required power from the diesel mill, be improved on. Alternative turbo’s, maybe even a second unit, ram/spinned air flow inducers, etc??? Any ideas?

Thanx

 

[LibertyCRD]

Supposedly Jeep took measures to drastically reduce turbo lag on the CRD. I sure can't tell it. Mine suffers from lag, particularly when slowing for a red light and then having to get back on the accellerator when it switches to green before a complete stop.

They say a smaller turbo will help with lag, and multiple turbos will too. But you are looking at voiding your warranty, and extreme amounts of money and labor to do something like this. As far as improving what we've got, there isn't anything I've seen.

I don't think the turbo lag is too bad...it is annoying sometimes and takes a little getting used to but it could be much worse. It doesn't hurt the performance too much.

 

[smithers_0990]

A high flow intake and a good size exhaust will help with turbo lag. I doubt there is anything aftermarket yet for the CRD so your pretty much going to be stuck making your own parts.

 

[AAFD]

Small turbos come up faster, larger units boost longer but the CRD liberty has a variable Geometry unit that should do both.

KC

 

[n3qik]

My lag was up to 2 full seconds before the turbo kicked in at 2000 RPM. After the EGR was replaced the lag is about .5 seconds. I see you have a 03. You could have a ERG problem of some type. Lets start at looking at the intercooler pipe from the IC to the engine. Is it full of oil, them the EGR mixing valve may be stuck/clogged just like the VW TDI are having. Note the EGR system is made ot two parts. The EGR valve, on yours I think it is located behind the turbo and vacummed operated and the EGR mixing valve, located on the intack manifold.

 

[Dwight]

If it is an 03, it isn't US made and doesn't have variable geometry from what I have read. Perhaps figure out how to get the US chip and turbo?

-Dwight

 

[styng88]

A larger turbo back exhaust is a must for slowing turbo lag; it will also help create higher boost levels. I put a 3" stainless TBE on my Subaru and it's one of the best mods to date. I'm not sure how the Jeeps are laid out, but a short-ram intake (replaces the stock snorkel) will also help. A smaller turbo will reduce max boost, so that probably ins't a viable solution.

 

[CaliCRD]

AEM is working on a high flow intake for the CRDs. It won't be out for two to three months though. They are using ours for a prototype. I will post the results here in three weeks.

 

[CaliCRD]

AEM is working on a high flow intake for the CRDs. It won't be out for two to three months though. They are using ours for a prototype. I will post the results here in three weeks.

 

[CaliCRD]

AEM is working on a high flow intake for the CRDs. It won't be out for two to three months though. They are using ours for a prototype. I will post the results here in three weeks.

 

[AAFD]

AEM is working on a high flow intake for the CRDs. It won't be out for two to three months though. They are using ours for a prototype. I will post the results here in three weeks.

Intake and exhaust would be a good first start.

KC

 

[Bonehead]

wow...........a triple tap (lol)