3.0 16V engine mods, etc

[Thom]

The beauty of a high-flowing set up allows to make decent power already by using the flow potential of the head without necessarily running high boost. It is possible to somewhat build the desired torque profile by modulating the throttle opening, and call for the maximum torque potential by adding boost pressure with even more throttle angle (this is with open loop boost control already and should be even more precise in closed loop). This makes the car flexible like an old school GT with a typically long throttle travel, like an E-type Jag for instance. The power delivery is particularly linear running at lower boost pressures and makes you feel like there are tons of power/torque waiting to be unleashed should you be inclined. This is all pretty obvious but because the reserve of flow is so high compared with an 8V set up it makes for more ways to exploit the performance, again simply by modulating the throttle.

I was able to reduce the light off-center play in the steering... by getting tyre pressure back to where it should be. Do we have a Carpokes cone of shame?

[ROB III]

The beauty of a high-flowing set up allows to make decent power already by using the flow potential of the head without necessarily running high boost. It is possible to somewhat build the desired torque profile by modulating the throttle opening, and call for the maximum torque potential by adding boost pressure with even more throttle angle (this is with open loop boost control already and should be even more precise in closed loop). This makes the car flexible like an old school GT with a typically long throttle travel, like an E-type Jag for instance. The power delivery is particularly linear running at lower boost pressures and makes you feel like there are tons of power/torque waiting to be unleashed should you be inclined. This is all pretty obvious but because the reserve of flow is so high compared with an 8V set up it makes for more ways to exploit the performance, again simply by modulating the throttle.

I was able to reduce the light off-center play in the steering... by getting tyre pressure back to where it should be. Do we have a Carpokes cone of shame?

Ah, Thom, cone of shame???? not on this web site, that would be contrary to the foundation of CARPOKES.
Besides, with all you've done to get the car where it is, the tyre pressure point just shows you are human.

[Thom]

Lately I have been mulling over trying one of the next gen G-series Garrett turbo. They are not exactly cheap but then a friend suggested I had a look at the Pulsar brand which for the configuration I'm considering cost less than half, which would make the swap a lesser effort. Pulsar is a Chinese brand and many folks seem to have had good success with them but it takes only one negative feedback to raise serious doubts, and there have been several... (and a possible dramatic increase in customs tariffs may change the game for the worse, who knows).

Thoughts?

[chris white]

did you look at the Xona Rotor stuff? very nicly biult.

[Thom]

Yes, and as said in the other thread the compressor maps they have on offer would require running a lot more boost than I can. Also, the G-series CHRA will fit right in place on my modified turbo mount as on the side of oil outlet the various offsets are the same as the GT/GTX turbos. The Xona would require more work to fit.

[chris white]

Yes, and as said in the other thread the compressor maps they have on offer would require running a lot more boost than I can. Also, the G-series CHRA will fit right in place on my modified turbo mount as on the side of oil outlet the various offsets are the same as the GT/GTX turbos. The Xona would require more work to fit.

I thought the idea was to make more work.....I've been doing it wrong!
I did have a bunch of stainless plates made up to make the Xona bolt on to a stock mount. I really like the idea that the mounting point of the center section is a bolt on part, redesign the plate to 944 mounting and it works great.
You do have to do a bunch of grinding on the mount to get clearance - but that depends on which parts you get.
Xona has an interesting concept in their 3 basic lines – quote from their website
Compressor Aero:
• XRE: High+ PR performance optimization
• XRC: Medium-High PR performance optimization
• XRA: Low-Medium PR performance optimization
So you can choose designs based on the pressure ratio you want to run. They don’t publish all the charts, the one I use aren’t on their site.
Tring not to be a salesman….I just like them!
The Tial hot side housing is that way to go on any turbo.

[Thom]

Thanks, I had skipped the various PR options. I guess I'll be waiting until they release the maps for the WRA range then.

[SirLapsalot]

Lately I have been mulling over trying one of the next gen G-series Garrett turbo. They are not exactly cheap but then a friend suggested I had a look at the Pulsar brand which for the configuration I'm considering cost less than half, which would make the swap a lesser effort. Pulsar is a Chinese brand and many folks seem to have had good success with them but it takes only one negative feedback to raise serious doubts, and there have been several... (and a possible dramatic increase in customs tariffs may change the game for the worse, who knows).

Thoughts?

I am currently finishing a 3.0l 8V engine and recently purchased a G30-660 with 0.83A/R. However, I accidentally ordered the internally gated version so I’ve sent it back to return for the standard housing. I’m still basically sold on this turbo, but before officially ordering the replacement I thought I might get others opinions.

What do you guys think about the G30-660 with 0.83 A/R for an 8V 3.0L running 1-1.3 bar of boost?

My application is street car so I’m more interested in mid range. Don’t care so much about max power dyno numbers.

Ill have the following setup/logging so I’ll be able to characterize the performance well (and happy to share all the data):
-EMAP
-EGT
-Pre-turbo temp and pressure
-Post-turbo temp and pressure
-Post-intercooler temp and pressure
-Compressor speed
-MAP

Other misc:
-Individual cylinder Lambda (only using for dyno)
-waste gate position

ECU can estimate airflow but might consider temporarily installing a MAF to check its accuracy as well.

I’ll be running OE intake and intercooler to start… so will be interesting to see data before/after as those are upgraded down the line.

[gruhsy]

What wastegate?

Lots of new options lately.

Lately I have been mulling over trying one of the next gen G-series Garrett turbo. They are not exactly cheap but then a friend suggested I had a look at the Pulsar brand which for the configuration I'm considering cost less than half, which would make the swap a lesser effort. Pulsar is a Chinese brand and many folks seem to have had good success with them but it takes only one negative feedback to raise serious doubts, and there have been several... (and a possible dramatic increase in customs tariffs may change the game for the worse, who knows).

Thoughts?

I am currently finishing a 3.0l 8V engine and recently purchased a G30-660 with 0.83A/R. However, I accidentally ordered the internally gated version so I’ve sent it back to return for the standard housing. I’m still basically sold on this turbo, but before officially ordering the replacement I thought I might get others opinions.

What do you guys think about the G30-660 with 0.83 A/R for an 8V 3.0L running 1-1.3 bar of boost?

My application is street car so I’m more interested in mid range. Don’t care so much about max power dyno numbers.

Ill have the following setup/logging so I’ll be able to characterize the performance well (and happy to share all the data):
-EMAP
-EGT
-Pre-turbo temp and pressure
-Post-turbo temp and pressure
-Post-intercooler temp and pressure
-Compressor speed
-MAP

Other misc:
-Individual cylinder Lambda (only using for dyno)
-waste gate position

ECU can estimate airflow but might consider temporarily installing a MAF to check its accuracy as well.

I’ll be running OE intake and intercooler to start… so will be interesting to see data before/after as those are upgraded down the line.

[SirLapsalot]

It’s a Turbosmart “UltraGate38” with their optional sensor cap.