What is the mod path to get the quickest turbo spool up time, on the stock turbos?

Exhaust/Tune is always the start with these cars, but I'm wondering about what other factors affect it

 

intakes (Do88), exhaust (Catless) and tune I think.

 

An IPD Plenum would be a good and simple first step. I'd be glad to set you up with one and let you critique it on its own with full support and a guarantee on my side.

 

We ran one season with tune and exhaust and GT2 ICs, spool was better than stock, but still noticeable below 4000rpm.

This winter added some better flowing SRM coolers, d088 inlets, stiffer springs in the BRVs, thermal wrapped the headers, and more custom tuning. All together this made a noticeable difference, probably cut spool time in half between 2500-3500 rpm.

 

+1 with the parts, will be noticeable

 

With all due respect IPD plenum makes zero difference on spool. I know because I installed one on my first 997tt. $1000 snake oil. Exhaust, tune and bigger inlet pipes will help though.

 

All of the upgrades mentioned above are great. It depends how far you want to go and what steps you want to take in what order too. A lot of people have had great success with the IPD plenum. Very well-documented, tested and proven. Probably over 100 to 1 vs people who didn't like it or didn't have a good experience with it. Personally I stand behind everything I offer so I'm very comfortable letting anyone try it especially if they can log but I can safely say my guys love it. When used to adapt a larger throttlebody it's a double benefit. Same on inlet pipes and intercoolers as well as some other parts. Good ones work well and with tuning really help you. Some of these items cost more than others and are the more difficult to install. So the only reason I mentioned it first is cost and install. Otherwise I say do all and the exhaust configurations vary.

 

Have to agree with same.. on my second round of mods after installing idp plenum and inlet pipes with proper tune my car had more spool but at the same time the car kept pulling as before it would fall a little on its face after 5k rpms

 

thanks everyone! Not ready to pull the trigger yet, since I don't have the title in hand yet. Good to research and plan ahead of time

 

Can you elaborate?

Are these the built-in diverter valves on the VTG turbos you're referring to?

Do they leak (bypass) with their stock springs when they're not supposed to?

What springs do you have in there now?

Thanks in advance

 

There has never been any testing that showed that the stock bypass valves are inadequate for anything the stock turbos are capable of producing. The aftermarket ones however, are NOT maintenance free, and have blown turbos by sticking partially open when the owner does not disassemble them and grease them as should be done at predefined intervals. I would not replace the factory valves...lots of headache for no gain with the aftermarket pieces.

 

This ^^^^^^^^

 

That's what I had heard. Lots of nightmares with the aftermarket ones.

BUT,.. it sounds like Webspoke had simply installed slightly stiffer springs in the stock valves,... which shouldn't hurt the reliability.
My car is stock turbo,.. but I do have a fresh pair of 63.5 VTG's in my garage.

Musing over the idea of actually installing them one day, and anything I might want to upgrade at that time.

 

Don't want to keep the BOV war going but I believe webspoke only swapped the springs. Borg Warner offers stiffer springs for the OEM recirc valves we have. In theory I agree it can help during transients.

I haven't tried them myself. I believe they are sold in the aftermarket under their EFR line.

 

Not to go to much off topic, but can your buy just the stock diverter valves as I don't recall where I heard, but you can't purchase these seperatly?!?!


I just called our local Porsche dealer and he didn't know what I was talking about. I just went online, got a pic, circled it in red and just emailed it to them. Hopefully I would get my answer from them soon.


I guess for stock it should be fine, but after years of usage (some are 10yrs old) and some make of our machines make 60-70% more power worth of air, getting a new one might be a smart decision.