3 Liter Turbo Registry
#1036
Rennlist Member
^^ Chicken dinner!
#1037
Nordschleife Master
My last evolution of 944/968 engine's did 947 hp at 1.8 bar on the dyno (855 rwhp). We ran it higher at WTAC but even if the managed to get the head to seal we cracked the engine block in the head.
It was a 3.1l dry sumped, solid lifter, engine with a twin scroll B&W EFR9280 with the large 1.45 housing.
It was a 3.1l dry sumped, solid lifter, engine with a twin scroll B&W EFR9280 with the large 1.45 housing.
#1038
Rennlist Member
Update on my build. A huge improvement from post #986. The tuner is still working on it. The Ethanol number is higher than it will be final. The blue line (18psi) is also higher than the final, which will be 15psi (shown in black). So this is showing maximums and then dialing it back so it can survive hour long sessions on 100 degree days. These are SAE numbers, so multiply by 1.15 for dynotech equiv.
A lot has changed since the previous run but hardly anything mechanical. It now has an emtron ECU replacing the haltech. It's now drive by wire with EGT, EMAP, Turbo Speed, a second air temp/pressure sensor, coolant pressure sensor, and well really, a ton of new sensors to help make this thing much more safe at the track. With the emtron, now get a lot of per cylinder knock and tuning controls, as well as a much snappier engine response.
I'll find out when the car is done what the limiting factors were, etc. There's a lot to go over. The key here though is find someone who understands the specifics of your engine, who has tuned them before. Nothing against the previous tuner, how many 3.0L 4cyl turbos do you see in the wild?
The following users liked this post:
ealoken (10-02-2021)
#1040
Rennlist Member
My stock block 3.1 on the RP968 made around 900hp,EFR9180 1.45 housing. Darton sleeves, dry sump etc It lived, but we were careful with it. We broke the torque tube before we had a chance to see how far we could push it, but it always lost oil pressure under boost.
#1041
Nordschleife Master
#1042
Rennlist Member
Under boost, it’s very noticeable on the logs, as soon as you lift off and the boost comes off you can see the oil pressure rise a bit. It’s either the girdle or the block itself moving. It’s manageable and as I said we never blew the engine, but we it wasn’t real confidence inspiring.
#1043
Nordschleife Master
Under boost, it’s very noticeable on the logs, as soon as you lift off and the boost comes off you can see the oil pressure rise a bit. It’s either the girdle or the block itself moving. It’s manageable and as I said we never blew the engine, but we it wasn’t real confidence inspiring.
#1044
Nordschleife Master
I've always seen this phenomen on these engines as well regardless of power levels. At least with the Aviaid dry sump oil pump I use to run for 8 years.
#1045
Nordschleife Master
#1048
Another build in progress.
951 very lightweight body
4.040” Sleeved bore
S2 crankshaft
JME 13sr/8sr camshaft
8V head
DRS developments dry sump
Motec M880
balance shafts and ATI damper
DRS developments ATI hub
951 very lightweight body
4.040” Sleeved bore
S2 crankshaft
JME 13sr/8sr camshaft
8V head
DRS developments dry sump
Motec M880
balance shafts and ATI damper
DRS developments ATI hub
Last edited by 951TurboRS; 10-24-2020 at 02:37 AM.
#1049
Rennlist Member
#1050