ShopTalk Forums | Aircooled VW Tech & Restoration Help

Paul H wrote:Good numbers Wally
I have a 2160 T1 going on the dyno soon
with larger than normal cam and 044 heads
I'll be trying 3 turbos for comparison one of which
is a GT30 we can see what it makes at 20psi

Thanks Paul!
That would indeed be an interesting test.
Let us know how it went,
Regards,
Walter

What were your intake temps and timing

Paul H wrote:What were your intake temps and timing

IAT was 15 Celcius.
Your a tuning expert by trade, so I am sure you will find your own best timing for that engine

Any results yet?

Secrets secrets...

15 Degree charge temp at 20 psi ? I'd have to run a charge cooler with tap water flowing through
to get near that

Paul H wrote:15 Degree charge temp at 20 psi ? I'd have to run a charge cooler with tap water flowing through
to get near that

Yes, I agree, it is stupidly low. I actually print-screened the log of that dyno run if you don't believe it. IAT rose just 2 or 3 Celcius during that 10 second run..
In fact, I had such a hard time believing it that I bought a different IAT sensor that was believed to react faster. Martin Tayler said s/th in that direction as well as he mentioned that he thought the Bosch sensor on his split reacted too slow.
The Dephi IAT sensor I run now showed however the same temperature curves, so there is probably some truth in these air temps after all.
The extremely good cooling alu cylinders, original type 4 heads and the Riechert cooling fan combined with WI and the largest air-air intercooler I could fit would also explain I can run a failly decent advance, but you probably gathered as much I suspect All on unleaded pump gas too!
Air-air intercooling FTW!

Any results from the turbo-testing Paul?

The motor is next on the dyno and I always run a thermocouple probe next to
the regular NTC sensor. I like to keep the ambient air temp at around 25C which
is about the same temp as the engine bay in a bus so for me to get 15c charge temps
I'd have to use a charge cooler with cold tap water to bring temps below ambient.

No 11's unfortunately as it seemed the clutch was slipping at the line at least.
Still did a lot of fun runs, most all 12.0-12.3's at a best of 114.8 mph.

On the way to home did a little unlimited running on the Autobahn
I'd say its stable at 137 mph

Man, I can imagine the look on peoples faces when they get passed by your car...
Priceless!

holy hell.... awesome

I wish that we could use our horse power like that

We can, we just end up I jail...

Nice going Wally you got balls !
I remember taking my bus upto 125mph speedo was obviously innacurate but just touched the
rev limit in 4th and it certainly wasn't stable had to make sure I had the use of all three lanes
of the 70mph limit motorway

Paul H wrote:Nice going Wally you got balls !
I remember taking my bus upto 125mph
..wasn't stable had to make sure I had the use of all three lanes
of the 70mph limit motorway

And you say I have balls?
Its much less an effort now the car stays stable. The AVO's, excentric top struts and the extra aero help of the front splitter really made this possible imo.

Just send an order/email to KEP. I have asked for the same now 3 times in 3 replies to his questions and he still doesn't get it... Gets really frustrating as I am in a bit of a hurry to get the car launch properly for the next event(s)..

this is such a great build ! a very good source for inspiration!

keep it up