Shaftless Throttle bodies

Talk and Tech about turbocharged 924/944/968 cars
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gruhsy
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Tom wrote: Wed Nov 30, 2022 8:16 am
gruhsy wrote: Wed Nov 30, 2022 7:42 am
Tom wrote: Wed Nov 30, 2022 7:23 am

8 valve/ typo?
Quantity five
Type 8V…..2V per cylinder 😉
Been up since 3am and not a morning person 😬😬😬😬😬
Sorry, my brain skimmed right over 'two' -- and started day dreaming about 5 valve heads. :)
All good lol.

Trouble shooting/testing CIWS right now too so lots of multi tasking. I would post photos but then I would have to kill everyone 🤫🤫🤫🤫

#61

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gruhsy
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https://www.bosch-motorsport.com/media/ ... g_2014.pdf

Got my Bosch fuel injection answer

Pages 157-176 of this catalog for anyone who wants to educate themselves.

#62

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Thom
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What sort of compression ratio are you planning for the engine running these?
'90 944 turbo

#63

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gruhsy
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Thom wrote: Fri Dec 02, 2022 1:56 pm What sort of compression ratio are you planning for the engine running these?
Yet to be determined on that.

For my setup it will be dual scroll turbo for sure
Mine will have a different intercooler with my unique sprayer setup.
Turbo will be determined closer to completion as there seems to be new stuff available every so often
Engine management will likely be Link from Chris White….unless he has something different at the time.
Exhaust will be Unobtainium fabrication

#64

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gruhsy
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Intake pieces scanned in

Just need now to go to Joe’s house and tweak the final design

#65

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Thom
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I was talking the other day with a friend of mine who is into muscle cars. He has a self-built AWD Chevelle putting down 2200+ hp. We came to the conclusion that any proper performance engine should be thought out as a NA engine first, and that the turbo is just a supporting ancillary. That means high CR, big cams, high revs, and add turbo(s) into the mix that can support how much the engine flows.
There is little reason these days to keep with low-ish CRs on a turbo engine. We have high octane fuels and all the electronic equipment to keep it all under control. I went with a low-ish CR on my 16V build and if I were to do it again I would have done things differently. I have no regrets though as I am getting older like everybody and this is a street car that needs to be docile most of the time I drive it and I plan to be buried with it. So at this stage and depending on your use you may really weigh your options before settling on a CR and cams combination. IMO at least.
'90 944 turbo

#66

SirLapsalot
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Thom wrote: Sun Dec 04, 2022 9:55 am I was talking the other day with a friend of mine who is into muscle cars. He has a self-built AWD Chevelle putting down 2200+ hp. We came to the conclusion that any proper performance engine should be thought out as a NA engine first, and that the turbo is just a supporting ancillary. That means high CR, big cams, high revs, and add turbo(s) into the mix that can support how much the engine flows.
There is little reason these days to keep with low-ish CRs on a turbo engine. We have high octane fuels and all the electronic equipment to keep it all under control. I went with a low-ish CR on my 16V build and if I were to do it again I would have done things differently. I have no regrets though as I am getting older like everybody and this is a street car that needs to be docile most of the time I drive it and I plan to be buried with it. So at this stage and depending on your use you may really weigh your options before settling on a CR and cams combination. IMO at least.
That’s a fairly drastic over simplification. You can only work with the combustion chamber you’re given… yes of course we have options with fuel and EFI control but I would be extremely cautious upping the CR coupled with increased boost on a 944 series engine. 16V or not.

#67

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Thom
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Well, it was clearly a very general consideration that may or may not work depending on each application, that's for sure.
'90 944 turbo

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SirLapsalot
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gruhsy wrote: Fri Dec 02, 2022 4:34 pm
Thom wrote: Fri Dec 02, 2022 1:56 pm What sort of compression ratio are you planning for the engine running these?
Yet to be determined on that.

For my setup it will be dual scroll turbo for sure
Mine will have a different intercooler with my unique sprayer setup.
Turbo will be determined closer to completion as there seems to be new stuff available every so often
Engine management will likely be Link from Chris White….unless he has something different at the time.
Exhaust will be Unobtainium fabrication
Re-Engine Management, Link just released a teaser for their new line. Not a lot of specs but looks exciting.

https://linkecu.com/g5/

I run their G4X and think it’s quite possibly the best product out there for the money.

#69

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gruhsy
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SirLapsalot wrote: Thu Dec 08, 2022 7:10 am
gruhsy wrote: Fri Dec 02, 2022 4:34 pm
Thom wrote: Fri Dec 02, 2022 1:56 pm What sort of compression ratio are you planning for the engine running these?
Yet to be determined on that.

For my setup it will be dual scroll turbo for sure
Mine will have a different intercooler with my unique sprayer setup.
Turbo will be determined closer to completion as there seems to be new stuff available every so often
Engine management will likely be Link from Chris White….unless he has something different at the time.
Exhaust will be Unobtainium fabrication
Re-Engine Management, Link just released a teaser for their new line. Not a lot of specs but looks exciting.

https://linkecu.com/g5/

I run their G4X and think it’s quite possibly the best product out there for the money.
Good to know that thanks. I was on their site a few weeks ago. Can’t remember the specifics of each one without going back to the website.
Too many things to remember.

I will hopefully be able to get the single ATPower throttle unit working with my new Ftech9 DME OBD2 combo.

I will weld an adapter to a stock intake and fab up the other 8V plenum pieces I have.

Lots of little projects.

#70

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