Show full size 924Board.org
Discussion Forum of 924.org
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 Technical FAQ924 FAQ (Technical)   Technical924 Technical Section   Jump to 924.org924.org   Jump to PCA 924 Registry924 Registry

Porsche 924 Racecar Build Thread (AAN Conversion)
Goto page Previous  1, 2, 3, 4, 5
 
Post new topic   Reply to topic    924Board.org Forum Index -> Performance Upgrades
View previous topic :: View next topic  
Author Message
924RACR  



Joined: 29 Jul 2001
Posts: 8346
Location: Royal Oak, MI, USA

PostPosted: Fri Sep 04, 2020 10:10 pm    Post subject: Reply with quote

Very impressive work!

Really like the diffuser... will be even sexier in carbon..
_________________
Vaughan Scott
Webmeister
'79 924 #77 ITB racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype
Back to top
View user's profile Send private message Send e-mail Visit poster's website
kondzi  



Joined: 02 Jul 2018
Posts: 126
Location: MZ/Poland/EU

PostPosted: Sat Sep 05, 2020 7:37 am    Post subject: Reply with quote

Really enjoying that metal work (alloy work). Good stuff!
_________________
---
Konrad
'89 951 US
'88 Mustang 5.0 LX Convertible (factory specs)
'84 911 Carrera 3.2 RoW (factory specs)
'81 931 RoW (TBD)
'81 Ford Capri 2.8i (factory specs)
'79 Ford Capri 2.9 (heavily modded)
'74 Ford Capri 1.3 (factory specs)
Back to top
View user's profile Send private message
Britain  



Joined: 26 Nov 2013
Posts: 185
Location: Hillsboro, OR

PostPosted: Tue Sep 08, 2020 4:36 am    Post subject: Reply with quote

Few more technical updates for this thread.

We kept having issues with the T3 flange bolts on the cast manifold coming loose and wanted to go with an slightly bigger turbo so I went about building a stainless manifold.

Started off cutting an exhaust flange on the waterjet and then had recessed cut into it on a friends CNC.


Then the cast stainless bends register right into these recesses.


Here is the log part of the manifold completed.


Then the up-pipe to the turbo was fabricated with the WG port.


Here is the manifold with the Garrett turbo hanging off it.


And the new v-band downpipe to go with it.
Back to top
View user's profile Send private message
Britain  



Joined: 26 Nov 2013
Posts: 185
Location: Hillsboro, OR

PostPosted: Tue Sep 08, 2020 4:36 am    Post subject: Reply with quote

The next things to address is more heat management.

First up with another oil cooler to add to the system. Now the oil comes from the engine thru this cooler first and then thru the oil-water heat exchanger. This reduced both the oil temps and the water temps which was the intended result.

Here is the oil cooler mounted off the front sub-frame:


And a scoop that fits flush to the front valance:


Next up was to reduce in intake air temps a bit. This turbo has a wider powerband so we are seeing boost long and therefore increased IAT's.

To start, I purchased a huge Garret intercooler core. This one is rated for 1200hp. The primary purpose for this size core was to get the depth that closely matched the stock unit.



I then proceeded to cut it in half which gave me a core that was 4.5" deep, 7" tall, and 22" wide (the stock 944 turbo core is 5" deep, 5.5" tall, and 18" wide)


Here is the comparison with the end-tanks welded on:




And mounted in the car with the fencing adjusted to match the increased width.
Back to top
View user's profile Send private message
CÚdric  



Joined: 27 Aug 2004
Posts: 1999
Location: Sweden

PostPosted: Tue Sep 08, 2020 6:01 am    Post subject: Reply with quote

Nice that you keep updating the thread. Have you though about doing a more ambitious extractor scoop on the bonnet. If you want to improve the efficiency of the radiators?
_________________
┤80 924 Turbo
Back to top
View user's profile Send private message MSN Messenger
Britain  



Joined: 26 Nov 2013
Posts: 185
Location: Hillsboro, OR

PostPosted: Tue Sep 08, 2020 8:07 am    Post subject: Reply with quote

CÚdric wrote:
Nice that you keep updating the thread. Have you though about doing a more ambitious extractor scoop on the bonnet. If you want to improve the efficiency of the radiators?


Yeah....space is a bit tight, but I am going to make something. There is a balance to ensuring we have ability to address things quickly during the race.

-Britain
Back to top
View user's profile Send private message
kondzi  



Joined: 02 Jul 2018
Posts: 126
Location: MZ/Poland/EU

PostPosted: Tue Sep 08, 2020 8:14 am    Post subject: Reply with quote

I need to master Aluminium TIG welding, that's a must
Tried a bit, but it's quite difficult, or it's just beginners issues.
Good to have friends with CNC capable to shape stainless, anyone with CNC shop wants to be my friend?
_________________
---
Konrad
'89 951 US
'88 Mustang 5.0 LX Convertible (factory specs)
'84 911 Carrera 3.2 RoW (factory specs)
'81 931 RoW (TBD)
'81 Ford Capri 2.8i (factory specs)
'79 Ford Capri 2.9 (heavily modded)
'74 Ford Capri 1.3 (factory specs)
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    924Board.org Forum Index -> Performance Upgrades All times are GMT + 11 Hours
Goto page Previous  1, 2, 3, 4, 5
Page 5 of 5

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group