Author Topic: Need Boost Sooner (Read 6046 times)

Tintin · « **Reply #15 on:** February 26, 2008, 04:09:44 pm »

Quote from: "andy2"

I ran these turbo's back to back and the k24 spools a bit quicker than the T3.The k24 has a slightly bigger compressor than the T3 and the T3 has a noticably bigger Turbine than the k24.Beacuse the T3 has a bigger turbine it works better for mid range-top end performance and the k24 will provide better low-mid range performance.Both turbos are not efficent when pushed past 21 psi for k24 and 23psi for the T3.

+1 I already try both turbo on AAZ, T3 and K24 (from 1.6TD) and yes the K24 spool a bit quicker.

KTZed · « **Reply #16 on:** April 14, 2008, 04:36:12 pm »

Just thought I'd update this as I have now done the following:

-Turned boost pin to max ramp
-Cut nylon washer in half
-Turned starwheel down 2 turns
-Unscrewed smoke screw untill it was just touching the top of the pin
-Turned max fuel screw in ~1/4 turn
-Adjusted idle screw to normalize idle

Results:
-Awesome

Turbo spools WAY faster now. I get a nice smokey cloud up untill 10-15psi then it clears up as boost builds to 20psi. Max egt's are about 1500F under a long pull, creeping towards 1600 if I do repeated pulls and heat soak the IC.
All this being said...its not like I have no turbo lag. The engine still needs to be in its midrange (dont have a tach) to make full boost, and even in the upper rpms, it takes a moment to build. It is still not a quick spooling as my friends '96 AAZ with K14/K03 (not sure which).
It is a huge improvement over what it was though.

RabbitJockey · « **Reply #17 on:** April 14, 2008, 05:15:08 pm »

yeah i was going to say its definitely the fueling, under stock fueling i could never get more than 15psi. its amazing how much power the lda adds

DonGTI · « **Reply #18 on:** April 14, 2008, 09:27:22 pm »

any news re. MPGs? have they improved?

KTZed · « **Reply #19 on:** April 14, 2008, 10:15:56 pm »

MPG have been affected minorly. My odometer doesnt work but I drive almost exactly the same amount each week (put in exactly 32L per week for the previous month or so) and this last week since I did the mods I put in 35L. That was including my first day of autocross in the golf however so im sure that burned some fuel. Overall I couldnt be happier.

jimfoo · « **Reply #20 on:** April 14, 2008, 10:57:00 pm »

Those are kind of high EGT's, at least higher than I would run..

truckinwagen · « **Reply #21 on:** April 14, 2008, 11:00:18 pm »

yeah, I try to stay under 1200F
but then I turboed an N/A

Riverfurm · « **Reply #22 on:** April 15, 2008, 03:09:11 am »

If I want to make more smoke the boost will come on sooner but, it soots up the rear of the car. I just hate the offline performance. A small amount of boost in first, second almost full boost at 3800rpm(20 psi) 3rd, 4th and 5th full boost from 3000 rpm up. So when I pull away from a light the traffic passes me, by the time I hit 3rd gear I am passing them with some smoke. Exhaust temps rarely get above 1050 F. I use this car as my shop vehicle. It has about 200 pounds (don't know what that is in Kilos) of tools and parts. Best MPG was 40+ highway.But it is still fun to drive.

KTZed · « **Reply #23 on:** April 15, 2008, 08:22:43 am »

Quote from: "jimfoo"

Those are kind of high EGT's, at least higher than I would run..

I suppose...but my car has always run hotter than others on here it seems...it was running this hot completely stock (stock boost, fueling, exhaust, no IC etc.). It will run at 1200F just holding speed up a small incline at hwy speed (making NO smoke). I have yet to check the timing so maybe that has something to do with it but it starts/runs fine so I never really bothered.
Also, when I say 1500F on a long pull, it'll only get there in 4th or 5th if I do a drag race start from 1st, or have a long stretch of hwy and pull up to 150kph or so...which really never happens during daily driving so im not too concerned. Ive yet to read anywhere of someone melting/blowing "X" part at "Y" Deg F EGT, its all just random claims of peoples comfort levels so untill I melt a piston Im happy :twisted:

Riverfurm · « **Reply #24 on:** April 15, 2008, 03:09:37 pm »

When I was drag racing snowmobile I ran an egt gauge and when it hit 1200F I knew the pistons where getting soft so I backed off it for a second and the temps. dropped down. If it hit 1500F that was a major melt down.

saurkraut · « **Reply #25 on:** April 16, 2008, 05:21:40 am »

Quote from: "libbybapa"

An appropriately sized vnt turbo will offer virtually instant boost and yet better flow than a conventional turbo at higher flow/rpms. The downside is the added complexity of an adequate vane control system and completely custom installation.

Andrew

Any chance of you offering a Vane Control System kit?