944 Turbo S Engine Rebuild Thread
- Thread starter Eldavo
- Start date
924Srr27l
New member
Waylander said:
A bit of Noise and V8 Power is a nice Combo.
Meet The 500HP LS3-Powered Porsche 944 Turbo From The Underground. - YouTube
R
I’m have twin OEM oil coolers in series, one either side of the radiator, with a mix of original hoses and some AN push fit hoses connecting them all.
I needed to change a circlip on the shaft of the power steering pump and wasn’t too happy with where one of the oil hoses had rubbed so . . . project creep. Removed all three hoses and ordered all the bits to remake them in black nylon braided AN10 with Fastflow fittings.
Turns out you can remove the hoses from the filter console in situ with a bit of swearing and sweating!
I needed to change a circlip on the shaft of the power steering pump and wasn’t too happy with where one of the oil hoses had rubbed so . . . project creep. Removed all three hoses and ordered all the bits to remake them in black nylon braided AN10 with Fastflow fittings.
Turns out you can remove the hoses from the filter console in situ with a bit of swearing and sweating!
vitesse said:Brilliant Dave-like a spiders cave in there[]
It‘s all relatively straightforward, not like the almost needlessly complex cooling and vacuum arrangements on the Twbo.
Show me a man who claims to have refitted a 944 Twbo engine and not had a coolant leak the first time he started the engine and I’ll show you a liar
Fitted this bloomin’ expensive 9 products adjustable cam timing gear, retarded the massively advanced timing back 2 degrees, zip tied my coilpack to the headlight bar and went for a spin. (Yes, I ran it exactly as it appears in the pic - running wasted spark off a Bosch Motorsports solid state coilpack).
First impressions from the bum dyno were very good, spool seemed 300rpm or so later but it kept pulling hard over the 5-6k rpm range whereas it felt like it was dropping off before. 5th gear pulls (on a private road, in leptons rather than mph obviously) from 100 had lots of urgency rather than feeling a bit asthmatic at 115 and "adequate” test speeds were reached.
Going back to see Dan next week to play about with some different cam timings on the dyno, see what’s what and make sure that the top end fuelling is fine for the cells we haven’t yet reached before. Realistically I’ll probably come away with a "road” and a "track” setting - with earlier spool at the behest of top end power for B-road blats and vice versa for whatever track days 2022 brings.
Will report back.
First impressions from the bum dyno were very good, spool seemed 300rpm or so later but it kept pulling hard over the 5-6k rpm range whereas it felt like it was dropping off before. 5th gear pulls (on a private road, in leptons rather than mph obviously) from 100 had lots of urgency rather than feeling a bit asthmatic at 115 and "adequate” test speeds were reached.
Going back to see Dan next week to play about with some different cam timings on the dyno, see what’s what and make sure that the top end fuelling is fine for the cells we haven’t yet reached before. Realistically I’ll probably come away with a "road” and a "track” setting - with earlier spool at the behest of top end power for B-road blats and vice versa for whatever track days 2022 brings.
Will report back.
£256 cam gear, tank of fuel, day off, 200 miles round trip and 4 hours on the dyno at a broad range of cam advance and retard (from -10 to + 4) and we ended up . . . not that far away from before we dialled the cam in
Gained more torque and more area under the curve, final figures where 405 ft/lbs torque at 2650rpm and 336(.1)bhpeeez. Dan Dan the Dyno Man said last time he saw a torque curve (or should that be torque plateau) like that it was from a V8.
Car drives unlike any 944 Twbo I’ve driven, I actually find myself taking liberties with throttle finesse as the lack of lag makes it drive like a big N/A and that shove in the back is sweet as you like.
Going to leave the engine as-is for 2022 and get some more track time, sort a couple of cosmetic bits out and get the aircon running properly again. A bigger turbo is always an option but more power will result in a far peakier graph and ultimately it’s the area under the curve that makes the car driveable and real-world quick rather than dyno-queen posturing.
Graph overlays are zeroed cam (thick line) vs where we ended up at +2 degrees advance (thin line), run in 4th gear, we tried 3rd but just got wheelspin. Ignore the wobbly bits later on, we hadn’t changed the ramp rate from the 3rd gear attempt so the dyno trace was lagging behind.
Car needs a damn good clean now ready for some different activities in the new year. []
Gained more torque and more area under the curve, final figures where 405 ft/lbs torque at 2650rpm and 336(.1)bhpeeez. Dan Dan the Dyno Man said last time he saw a torque curve (or should that be torque plateau) like that it was from a V8.
Car drives unlike any 944 Twbo I’ve driven, I actually find myself taking liberties with throttle finesse as the lack of lag makes it drive like a big N/A and that shove in the back is sweet as you like.
Going to leave the engine as-is for 2022 and get some more track time, sort a couple of cosmetic bits out and get the aircon running properly again. A bigger turbo is always an option but more power will result in a far peakier graph and ultimately it’s the area under the curve that makes the car driveable and real-world quick rather than dyno-queen posturing.
Graph overlays are zeroed cam (thick line) vs where we ended up at +2 degrees advance (thin line), run in 4th gear, we tried 3rd but just got wheelspin. Ignore the wobbly bits later on, we hadn’t changed the ramp rate from the 3rd gear attempt so the dyno trace was lagging behind.
Car needs a damn good clean now ready for some different activities in the new year. [
]
Dan944t
New member
Eldavo said:£256 cam gear, tank of fuel, day off, 200 miles round trip and 4 hours on the dyno at a broad range of cam advance and retard (from -10 to + 4) and we ended up . . . not that far away from before we dialled the cam in
Gained more torque and more area under the curve, final figures where 405 ft/lbs torque at 2650rpm and 336(.1)bhpeeez. Dan Dan the Dyno Man said last time he saw a torque curve (or should that be torque plateau) like that it was from a V8.
Car drives unlike any 944 Twbo I’ve driven, I actually find myself taking liberties with throttle finesse as the lack of lag makes it drive like a big N/A and that shove in the back is sweet as you like.
Going to leave the engine as-is for 2022 and get some more track time, sort a couple of cosmetic bits out and get the aircon running properly again. A bigger turbo is always an option but more power will result in a far peakier graph and ultimately it’s the area under the curve that makes the car driveable and real-world quick rather than dyno-queen posturing.
Graph overlays are zeroed cam (thick line) vs where we ended up at +2 degrees advance (thin line), run in 4th gear, we tried 3rd but just got wheelspin. Ignore the wobbly bits later on, we hadn’t changed the ramp rate from the 3rd gear attempt so the dyno trace was lagging behind.
Car needs a damn good clean now ready for some different activities in the new year. [
Nice one mate????????????????
Cheers Dan, the thing that makes me happiest is digging out an old PH thread where everybody was creaming their loads over Baz Hartech’s 3.0 944 Turbo that made 350 ft/lbs and 300bhp. Raving about how "real world fast and tractable” it was and rueing how expensive it would be to build.
Personally, if I built a 3l Turbo I’d be looking for significantly more power and a lot more area under the curve than Baz ever achieved!
Personally, if I built a 3l Turbo I’d be looking for significantly more power and a lot more area under the curve than Baz ever achieved!
Dan944t
New member
i’m absolutely with you on that. i don’t know enough about how to achieve what you have on the exact science of getting what you need regarding the power curve ect ( wish i bloody did!) but i have to rely on a good tunner for that —…………but i remember when jon at jmg had my car with a load of mods and i got it back and it was around the 300 mark , but he reckoned the torque was sonewhere close to 400 ftlb and bloody hell was it amaizingly fast!!! it didn’t last long untill my cylinder split right through but i can tell you for nothing that i raced a couple m3s and a m5 and beat both significantly and i still have the email to John saying how the he’ll was this even possible ? and he said the power curve of your torque is amaizing.
im missing my car so much havnt had it on road since but am in middle on and off or grafting a lorry turbo on it twin scroll holset hx35 twin wastegate ect ….. and now have all racing forged internals ect - but even then beed to spend an arm and a leg on stand alone ecu ect , so will be a while till i get it where i want it, and really don’t know how it will turn out, but my guess is , maybe a bit laggy ? or i might be supprised becuase of the twin scroll spool? …… but i predict it’s gonna pull like an absolute monster once in boost , which is fine with me as i have an awesome naturally aspirated 986 that i’m also enjoying and have plans for , so have a variety of both types of engine characteristics
well happy for you , you’ve done amaizing with yours []
im missing my car so much havnt had it on road since but am in middle on and off or grafting a lorry turbo on it twin scroll holset hx35 twin wastegate ect ….. and now have all racing forged internals ect - but even then beed to spend an arm and a leg on stand alone ecu ect , so will be a while till i get it where i want it, and really don’t know how it will turn out, but my guess is , maybe a bit laggy ? or i might be supprised becuase of the twin scroll spool? …… but i predict it’s gonna pull like an absolute monster once in boost , which is fine with me as i have an awesome naturally aspirated 986 that i’m also enjoying and have plans for , so have a variety of both types of engine characteristics
well happy for you , you’ve done amaizing with yours [
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