This is the engine with the new PWR 5" intercooler. I`m really impressed with it and in combination with a water/ice reservoir of 25 litres it will help keeping the AIT under control. I used tap water (not running) in the tank and after several pulls the max intake temperature according to the log was 52C. When I changed the water and used ice the AIT maxed out at 32C after several pulls. The total volume of the plenum above the IC to the throttle plates is 2.4 litres or 150% of the engine volume. Just above the IC there is a welded V to help airflow and to avoid turbulence. The plenum is 3" going down to 2.75" then 2" at the throttle plate further decreasing all the way to the small 40mm intake valve.
And at the front I have the water/ice tank with a ordinary bilge pump mounted at the bottom of the tank:
And last I compared the curve from last at 17 psi to the curves yesterday at the same boost. New to the left, old to the right:
This is when we tried to level out the dip at BMEP that you can clearly see.
nice Kalle
have you checked your boost levels on the "list" page from the Dynapack l that it is "rock steady"??
small variations in boost levels directly affect torque and HP curve.
fastback wrote:nice Kalle
have you checked your boost levels on the "list" page from the Dynapack l that it is "rock steady"??
small variations in boost levels directly affect torque and HP curve.
Hi and thank you guys!
Yes, I have spent the days after the dyno sessions looking at my log and compared them to the list page from the Dynapack. The boost is rock steady if we wanted it to be but it is not dropping. The AFR on the other hand is dropping from 12.4-12.5 @ 5600 rpms to 12.0 @ 5800 rpms to 11.8 - 12.0 @ 6000 rpms before it picks up again to 12.4 the rest of the way
Just about to start tuning a 2180cc motor with 58mm SP1's and a single 58mm throttle body.
Starting off with 36-1 batch fire and then moving on to sequential fuel see what happens.
Might even throw in a fan belt horsepower test -just so you know
Paul H wrote:Just about to start tuning a 2180cc motor with 58mm SP1's and a single 58mm throttle body.
Starting off with 36-1 batch fire and then moving on to sequential fuel see what happens.
Might even throw in a fan belt horsepower test -just so you know
I needed a starter map for TPS v RPM so I managed to get that roughed out and running well. A couple of power runs gave 145 at the flywheel with belt and 159 without belt. next I,ll try the high mount injector position and a vee belt.The last vee belt test I did was 22hp loss so I'll see if that happens again.
We use the IDF throttle bodies on readily available manifolds for T4 at the moment and I'm working on
some Solex replacement throttle bodies 36mm and 38mm to go on the OEM manifolds along with an injector boss and rail kit. Also a single throttle body kit that fits to the aftermarket Weber 32/36 manifold.
What T4 engine/vehicle do you have ?
I don't have any manifolds like that for the Type 4 engine.
I recently fitted a pair of 38mm IDF throttle bodies to a slightly modified 2 litre which had some 96mm Barrels and 40 Dellorts maybe it had a mild cam but the owner didn't know any details.The engine ran OK and made 71rwhp but after the conversion to engine management it made 85rwhp which is a big increase-it pulled like a train and was super smooth at all speeds
Yes I was quite surprised with that result plus 20% !
I didn't spend much time on the carbs or even use an O2 meter so maybe they were running a bit lean.
I had the 38mm IDF flow tested along with a 48mm IDF carb ( 40 mm vents and large ram pipe) and the throttle body
flowed 3% more with only short straight rampipe, I think if we played with the larger tapered ram pipes we could have seen plus 5 or 6% improvement -45 TB's were plus 8% with short tube
