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Mclaren924
Joined: 13 Oct 2021
Posts: 259
Location: Oceanside CA
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 Posted: Tue Jan 25, 2022 7:23 pm Post subject: Advice for turbochargers |
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Currently looking a turbocharger setup to run on the motor im building and could use some advice or direction. I have forged conrods and pistons with a piper turbo cam and mechanical followers. I have a microsquirt ecu on the way as well to control it all along with a 951 intercooler setup I'm currently fabricating . My question is what turbo housing setup to run if I'm really trying to boost this sucker to the moon. Ideally I would like somewhere around 390-425 crank hp with relatively fast spool times. Would this be more attainable going with an adapter and running a more modern garrett or is it simpler to go with a hybrid k26/27?
Cheers
Malcolm
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1980 931 "Salt" Bucket wannabe racer (Dreaming)
1979 924 Sebring "Pepper" -Sold
1977 924 Slicktop "Pennie"-Most likely parts
1979 3/5 gt clone 924- Shop Test Car |
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Cedric
Joined: 27 Aug 2004
Posts: 2801
Location: Sweden
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| Posted: Tue Jan 25, 2022 8:35 pm Post subject: Re: Advice for turbochargers |
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| Mclaren924 wrote: | Currently looking a turbocharger setup to run on the motor im building and could use some advice or direction. I have forged conrods and pistons with a piper turbo cam and mechanical followers. I have a microsquirt ecu on the way as well to control it all along with a 951 intercooler setup I'm currently fabricating . My question is what turbo housing setup to run if I'm really trying to boost this sucker to the moon. Ideally I would like somewhere around 390-425 crank hp with relatively fast spool times. Would this be more attainable going with an adapter and running a more modern garrett or is it simpler to go with a hybrid k26/27?
Cheers
Malcolm |
You can let go of the k26/k27 platform, it wont be an easy way.
Joakim uses a BW EFR 7670, check the video and dyno papers. Before this he used a GT3076, with an adapter welded on the standard exhaust manifold, and ran it around the 400hp mark, but the BW is more responsive down low and it breathes better with the twin scroll manifold (especially sensitive with agressive cams) and higher turbine efficiency, so it runs lower EGTs for the same power. Its all bout budget though, do you have E85? If not it would be good to put some effort into the ports so you dont have to run so much boost.
Take it in small steps, and do alot of measuring so you know what you are doing. Prep the manifold for EGT, boost temp, and keep track of pressure drop and temp over the IC, it isnt massive for 400hp. Microsquirt have no knock control, not sure if you have any plans there or just hope for the best.
https://www.youtube.com/watch?v=Maae0lF1mXs
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1980 924 Turbo
www.instagram.com/garagecedric/
Last edited by Cedric on Tue Jan 25, 2022 8:42 pm; edited 1 time in total |
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morghen
Joined: 21 Jan 2005
Posts: 9095
Location: Romania
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| Posted: Tue Jan 25, 2022 8:38 pm Post subject: |
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If you want quick spool old turbochargers are kind of out of the question, also you'll have to size the new turbo pretty well. Perhaps look into a Borg-Warner turbo or IHI. There is a lot to learn when sizing a turbo for power and spool specs.
Factory conrods have been proven to hold in excess of 400hp in racing enviroment so you didn't really need those.
Fixed followers are only really needed if you plan on keeping the revs over 6500 for long periods of time...maybe look into getting matching valve springs if you're doing the lighter followers upgrade.
Forged pistons are a must if you aim for that kind of power but what CR did you go for?
What do you plan for management? that kind of power can only come with a proper EFI conversion and tuning.
Raceboy sells a VEMS kit for the 924 turbo if i'm not mistaken.
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Supercharger and EFI kits
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Carrera RSR
Joined: 08 Jan 2010
Posts: 2312
Location: Somerset, UK
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| Posted: Wed Jan 26, 2022 6:23 pm Post subject: |
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Good luck. Need pics and updates
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
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Mclaren924
Joined: 13 Oct 2021
Posts: 259
Location: Oceanside CA
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| Posted: Thu Jan 27, 2022 1:45 pm Post subject: Re: Advice for turbochargers |
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Cedric, I would love to go with a newer turbocharger but was mostly worried about how easy it would be to get my hands on or create an adapter for something newer. Also I was going to purchase the micro squirt controller the same day I posted but have since read your message and am looking to suggestions for better options. Including the vems cpu that morgen mentions, does this come with knock detection? I also wonder about the fuel system as I’m sure stock s2 fuel system cannot support these numbers.
_________________
1980 931 "Salt" Bucket wannabe racer (Dreaming)
1979 924 Sebring "Pepper" -Sold
1977 924 Slicktop "Pennie"-Most likely parts
1979 3/5 gt clone 924- Shop Test Car |
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Cedric
Joined: 27 Aug 2004
Posts: 2801
Location: Sweden
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| Posted: Thu Jan 27, 2022 7:06 pm Post subject: Re: Advice for turbochargers |
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| Mclaren924 wrote: | | Cedric, I would love to go with a newer turbocharger but was mostly worried about how easy it would be to get my hands on or create an adapter for something newer. Also I was going to purchase the micro squirt controller the same day I posted but have since read your message and am looking to suggestions for better options. Including the vems cpu that morgen mentions, does this come with knock detection? I also wonder about the fuel system as I’m sure stock s2 fuel system cannot support these numbers. |
If the manifold adapter feels like a big hurdle maybe you should set the bar lower, it also includes new oil and drain line. But in the whole project pretty small things.
Micro squirt could most likely go there, some tuners use simple analogue detonation listening which works well Durrington the tuning stage at least. If you aren't tuning it by yourself chose a systen that your tuner prefer and feel comfortable with. That could save you time and hassle. Over here few chose vems anymore, MAXXECU has really been taking over due to its great usability and functionality. But there are many many options. Talk to your tuner and see what they say.
Your will most likely need a fuel pump upgrade. Do you have e85? That would be a very big advantage, but you need to size the fuel system for it.
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1980 924 Turbo
www.instagram.com/garagecedric/ |
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