KSira

The first dyno mash is ready. Apologies for the rather crude resolution.




Stealing this idea from refresh951. The few of us running 16V Turbo engines deserve our own thread. So keep em coming. Remember to post specs. I'll go first.

Spec
-3.0 S2, stock bore and stroke
-JE 8.0:1 compression (probably slightly higher due to decked block twice)
-Dry sleeves
-Piston squirters from 968.
-H profile conn. rods
-Custom intake (made by an idiot(not me) and a piece of crap. Will be changed)
-Lightly ported (done by the same idiot that made the intake, probably more harm than good done)
-3" exhaust
-Link G4+ Storm
-Comp CT4X-6467T4 AR .81
-Chris White 60-2 trigger.
-LS1 coils
-Sequential injection

Dyno done on waste gate spring pressure of 0.8 Bar. Torque peak is because of slight overboost

Kris H

[spot reserved for my build dyno charts]

2.5L 16v - build in progress:

- 944s head (stock)
- 951 bottom
- Custom intake
- 3" freeflow exhaust, screamer pipe
- Ecumaster EMU standalone
- VW/Audi/Bentley W12 COP
- Holset HXS40

KSira

Fixed!

V2Rocket

KSira, that engine has a lot of torque even off boost...do you have any positive manifold pressure at 2000rpm or is it basically breathing atmospheric there? Nice power without pushing much boost!

Dutch944

[spot reserved for my dyno chart]

Spec
-3.0 S2, stock bore and stroke
-Wiseco 8.5:1 compression
-Dry sleeves
-Standard conrods at the moment (Turbo forged) But Pauter on the bench
-Custom intake as seen on many pics


Rest will be added later

azbanks

I thought the "3 liter turbo registry" thread(the sticky thread second down from the top of the thread list in this section) already had all this.

blown 944

I think they are missing the point of mashing tgem together on the same graph.

KSira

This is specific for the 16V. The other thread is mostly 8V, as this is the most common.

KSira

Maybe it will be when we get more than one dyno in this thread with specs.

KSira

There is some positive manifold pressure, at low RPM. The attached log shows a 2. gear pull with change to 3. gear up to 5000rpm. Notice that it takes almos a second to build full boost after the gear change. The plan was to change to a smaller turbo, but looking at the NA dynos of an S2, the high torque peak 4k RPM seems to be the characteristic of the engine, and I'm not sure if a smaller turbo will gain much in spool up.

Paulyy

This can be useful also for 2.5-2.8 16v builds.

Duke

My old engine.

3.0l 16v.
104.5 mm overbore alusil 968 block.
Wössner pistons 9.5:1 CR
968 head with Variocam retained
Pinned girdle
9/16 ARP head studs
Pauter rods
Garrett GT3582R, 0,82 a/r T3 hotside
Tial 50 mm bow
Tial 44 mm vband wastegate
3" downpipe
4" exhaust
Large intercooler and IC piping
BMC airfilter
Link G3+ EMS
160 lbs injectors
Pump fuel
+ lots of other stuff

514 rwhp @ 17 psi.

Dougs951S

I'll also chime in with my in progress build

Steel sleeved 2.5 block bored to ~102.5mm, half filled
knife edged and lightened, offset ground factory 2.5 crank
86mm stroke x 102.36mm bore, 2.85 liter
JE dished pistons, 9:1 compression ratio
150mm eagle rods, mitsubishi 4g63 big end size
rebuilt and ported 100mm bore 16v head
103mm cometic MLS gasket
ARP hardware
ACL ceramic coated race rod bearings
factory main bearings
Full HX35/#12 twin scroll
Short runner ITB intake manifold with 46mm butterflies
LS1 ignition coils
80# injectors
044 fuel pump
Megasquirt engine management
twin 40mm wastegates
HKS BOV
big FMIC
twin scroll X-over with 3" turbo back

Looking to make 500+ rwhp

Thom

13 (+1) posts so far and only 2 dyno sheets. Interesting.

KSira

Duke: Looking at the charts, your engine built boost much earlier. How much would you guess where due to the variocam? Just curious how much would you guess a smaller exhaust like T4 0.63AR compared to a T4 0.81 would help spool?