You can change the style the forum displays by selecting your preferred style at the bottom left of the site.
We have made an enhancement so that old threads should now link from search results to the correct thread. This is not yet in place for single post links
The plot thickens! Not a nice feeling is it, I wondered for a while whether I had somehow been shipped the wrong turbo!
Its funny the opposing problems we have had too, too savage, and not savage enough...
It does kind of clear things up though...
My only concern now is I will be taking 2 steps forward not the one I was thinking I.e. a bigger wheel and a bigger housing not just the housing. I will effectively end up with a 3071.82.
It will be interesting to see how it performs with my light car, light rotating assembly and shorter gears of the 5 speed.
If its to laggy I could always go 1 step back to the .63 housing...
A wastegate and some other bits and bobs later it's dialed in.
Can't really make it produce more than about 1.7 bar, it just won't do it, even with the wastegate fully shut. And 1.45 to redline.
This is a ported head though.
Consistent 2.7 second FATS times with us two in the car.
It's very quick, but very linear power delivery. The very low weight is what makes it quick, I don't think it is running much more than 400 bhp though, but I am sure it is nice to drive.
Full boost is 3500ish, there's basically no lag at all on this. Just gets up and goes.
Very nice, sounds like great fun to drive. How much does the car weigh?
A Ur is about 200kg lighter than an S2. My series 2 with 3B is noticeably quicker off the mark than S2 thanks to lower weight though Cq blunt shape turns the tables after 100mph. But seeing as you cannot go over 100mph here without losing your licence It's not a problem for me...
1986 Coupe q - 2281cc 3B, chargecooler, 2.75" exh & downpipe, ported head, water injection, CGR box, modified MD357 turbo, 440cc injectors, high power coil.
2004 A4 2.5TDi convertible, re-mapped to 180bhp
2011 A5 sportback 3TDi-Backbox delete, remap
I'm absolutely chuffed to bits with the way the car is performing now. It spools up nice and low and just keeps pulling and pulling.
Massive thanks to everyone involved this Sunday! I was very lucky to have just the right people all in one place at once.
Dimintri, JP, Ish and the guys at quattro coachworks all did a great job!
It wasn't without it's issues. First we had to find the diagnostic connectors, which Ish soon, found, never used these, wouldn't have had a clue, but he used an existing stripped loom, and knowledge from their own cars to find it.
All the guys at quattro coachworks are true petrol heads, with a good sense of humour Their work rate was impressive.
Then we went out for mapping, the "refurbished" wastegate I bought from EFI Express was sticking badly. It would control about 0.5 Bar, and then suddenly stick and spike to 1.7! This was with the N75 disconnected, on all manual boost control.
JP came to the rescue with a decent unmolested wastegate from an RS2.
Dimitri did a great job mapping, and didnt give up even when I was a little despondant.
The car now idles better, doesnt stall, and has a much smoother powerband.
The reworked head that JP did for me has also made the car much better or boost, smoother and better up top.
Seriously guys, I'm really happy, it's now just as I wanted it.
Dimitri thinks I need a bigger turbo though!
Anyway, after taking a whole boot load of tools out, here are some perfromance box results, I think they speak for themselves!
The racelogic software is horrible to use, so here is a blurry photo, and then some data from the file;
0-60 in 3.9 Seconds
50-70 in 1.8
60-80 in 1.9
I think I maybe could do a bit faster with more time, but I was pretty pleased
I think I can improve the breather system which may help a little, but otherwise I wouldn't really change anything now
I think I maybe could do a bit faster with more time, but I was pretty pleased
I think I can improve the breather system which may help a little, but otherwise I wouldn't really change anything now
Excellent times!
Can you post the Pbox graph as well?
Would be great to see the graph and data from separate 2nd gear and a 3rd gear, no shift pull from 2000rpm to redline (flat ground, of course).
FATS time won't be quite comparable to S2/RS2/RS4 as the URquattro ratios are quite a bit shorter, but 60-80mph and 60-90mph times will be comparable, and the short ratios gain quickness as long as the speed interval does not require a shift due to the shorter ratio.
What gearbox is in yours?
Tyre size?
1995 RS2 on Alcohol (6.8sec 100-200km/h)
1994 80E Avant
1986 2L Golf 2 on Alcohol
Yup, just noticed in Darrens thread that he runs a CBL box that has the same 1.32 for 3rd and 4.11 FD.
Know the tyre size?
2.7 FATS with those ratios mean 3rd gear 60-90mph in right around 2.5s.
That is as quick as the following much rapid vehicles:
Ferrari 458 (570hp)
Porsche Carrera GT (612hp)
Ferrari Enzo (660hp)
993TT (408hp and 1507kg) was 3.40s in 3rd gear (same overall gear ratio)
997TT (480hp) is 3.30s (both thru gears and 3rd gear only)
Stock RS2 was 5.2s in 3rd gear
We process personal data about users of our site, through the use of cookies and other technologies, to deliver our services, personalize advertising, and to analyze site activity. We may share certain information about our users with our advertising and analytics partners. For additional details, refer to our Privacy Policy.
By clicking "I AGREE" below, you agree to our Privacy Policy and our personal data processing and cookie practices as described therein. You also acknowledge that this forum may be hosted outside your country and you consent to the collection, storage, and processing of your data in the country where this forum is hosted.
Their work rate was impressive.
Comment