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

924 GT8 - Rover V8 conversion
Goto page 1, 2  Next
 
Post new topic   Reply to topic    924Board.org Forum Index -> Engine Transplants
View previous topic :: View next topic  
Author Message
prophead  



Joined: 12 Jul 2016
Posts: 28
Location: Falkirk, Scotland

PostPosted: Sat Jul 16, 2016 3:58 am    Post subject: 924 GT8 - Rover V8 conversion Reply with quote

Hello all,
This seems as good a place as any to introduce myself and my car. I recently bought this car as a not quite finished project with the intention of using it as a track car but keeping it road legal. It's a 1981 924 with full body kit, Rover 3.5ltr V8 conversion (very small block 213 to you Americans) running Edelbrock CFM 500 4 barrel carb and performance intake, performance cam, stage 2 heads, and a very large exhaust. The interior is stripped, Corbeau Clubman seats and 6 point bolt in cage. It has Spax coil overs, 944 turbo 4pot front brakes.

Lets see if I can post some pics

[img]https://www.flickr.com/photos/144556909@N08/shares/3B832X[/img]
_________________
924 GT "8 Ball" track car project
944 Lux rolling project, nearly done
Back to top
View user's profile Send private message
Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11332
Location: PacNW

PostPosted: Sat Jul 16, 2016 8:11 am    Post subject: Reply with quote

https://www.flickr.com/photos/144556909@N08/shares/3B832X

Sweet. Would love some video to hear it running. . .
_________________
Toofah King Bad
  • Shaggy (1980 931) - Got Boost?
  • Red (1987 924S) - Pro44/Spec944
  • Weiße Scheiße (1987 924S) - In Progress
Back to top
View user's profile Send private message Visit poster's website
nickthompson  



Joined: 26 Mar 2013
Posts: 840
Location: Central Georgia

PostPosted: Sat Jul 16, 2016 9:52 am    Post subject: Reply with quote

Ditto on the video.
_________________
81 924 N/A 1.8t swap in progress.
Back to top
View user's profile Send private message Yahoo Messenger
prophead  



Joined: 12 Jul 2016
Posts: 28
Location: Falkirk, Scotland

PostPosted: Mon Jul 18, 2016 10:34 am    Post subject: Reply with quote

thanks. At some point will get around to video for the "sound track"
_________________
924 GT "8 Ball" track car project
944 Lux rolling project, nearly done
Back to top
View user's profile Send private message
prophead  



Joined: 12 Jul 2016
Posts: 28
Location: Falkirk, Scotland

PostPosted: Mon Jul 18, 2016 10:35 am    Post subject: Reply with quote

in the meantime, here are a couple of pics of the engine install...

https://www.flickr.com/photos/144556909@N08/shares/r21545
_________________
924 GT "8 Ball" track car project
944 Lux rolling project, nearly done
Back to top
View user's profile Send private message
JjyKs  



Joined: 05 Oct 2015
Posts: 114
Location: Finland

PostPosted: Fri Jul 22, 2016 10:10 pm    Post subject: Reply with quote

I love this swap!
Back to top
View user's profile Send private message
Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11332
Location: PacNW

PostPosted: Sat Jul 23, 2016 4:39 am    Post subject: Reply with quote

Great swap, probably very similar weight to the cast iron 4...my buddy had one of these blocks in his shop and you could pick it up with one finger.
_________________
Toofah King Bad
  • Shaggy (1980 931) - Got Boost?
  • Red (1987 924S) - Pro44/Spec944
  • Weiße Scheiße (1987 924S) - In Progress
Back to top
View user's profile Send private message Visit poster's website
Cédric  



Joined: 27 Aug 2004
Posts: 1588
Location: Sweden

PostPosted: Sat Jul 23, 2016 6:02 am    Post subject: Reply with quote

Nice engine swap, in the mgb gt (iron head and block) i heard that the rover v8 actually was lighter than the standard 1.8.
_________________
´79 924
http://www.garaget.org/show.php?car=211
´80 924 Turbo
http://www.garaget.org/?car=160275
Back to top
View user's profile Send private message MSN Messenger
Fifty50Plus  



Joined: 28 Feb 2008
Posts: 977
Location: Washington DC area

PostPosted: Sat Jul 23, 2016 12:21 pm    Post subject: Reply with quote

I raced a V-8 Rover engined Triumph TR8 at the 24 hours at Nelson Ledges in 1990. The engine ran like a clock but the car sucked. Now you have a happy marriage
_________________
1979 924 NA race car
1982 924 NA race car - Sold
1982 924 Turbo almost a PoS
1981 924 Turbo a real PoS, new engine
1982 924 Turbo nice body, blown engine
1972 911 E race car - going to Vintage
Various 944s to become IT-S race car
Back to top
View user's profile Send private message
prophead  



Joined: 12 Jul 2016
Posts: 28
Location: Falkirk, Scotland

PostPosted: Wed Aug 03, 2016 4:55 pm    Post subject: Reply with quote

Thanks everyone for the comments.

Yes, the engine is no heavier than the original. In addition the headlight motor and mechanism are removed as well so extra weight saving up front.

Its not the most powerful of engines, should make 200-210bhp at the flywheel, but is very use-able power! Yet to be dyno'd as I am still figuring out a decent crankcase breather system. The setup in the pics doesn't have wide enough pipework to vent gases created at higher rpms.

This should be a fun and useable package once I get a few more of the details worked out.

here's a couple more pics
https://www.flickr.com/photos/144556909@N08/shares/1vnjq7
_________________
924 GT "8 Ball" track car project
944 Lux rolling project, nearly done
Back to top
View user's profile Send private message
Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11332
Location: PacNW

PostPosted: Wed Aug 03, 2016 5:37 pm    Post subject: Reply with quote

RE: breather, you could go BMW route and use a vacuum pump on the crank case.
_________________
Toofah King Bad
  • Shaggy (1980 931) - Got Boost?
  • Red (1987 924S) - Pro44/Spec944
  • Weiße Scheiße (1987 924S) - In Progress
Back to top
View user's profile Send private message Visit poster's website
prophead  



Joined: 12 Jul 2016
Posts: 28
Location: Falkirk, Scotland

PostPosted: Fri Aug 26, 2016 5:04 am    Post subject: Reply with quote

The highs and lows of classic sports car ownership. About a week ago I was chuffed to bits that the GT8 passed the MOT with flying colours. Great I thought, I can enjoy it for a couple of months before taking it off the road and getting into the meat of the project. So, I stuck 4 new tyres on and booked into a track evening for Monday. Then I took it along to a show on Sunday, where it got quite a bit of interest. On the way back from the show "oh bugger, why cant I change gear" - something in the clutch release mechanism has failed! So my hand has been forced and it's off the road and I've started tearing it down. Gutted....

So here begins the project thread in earnest. Next step, working out how to drop the trans out.

https://www.flickr.com/photos/144556909@N08/shares/613964
_________________
924 GT "8 Ball" track car project
944 Lux rolling project, nearly done
Back to top
View user's profile Send private message
prophead  



Joined: 12 Jul 2016
Posts: 28
Location: Falkirk, Scotland

PostPosted: Tue Aug 30, 2016 9:19 pm    Post subject: Reply with quote

So, the transaxle is removed and the torque tube out the way. Then it was a 5hr struggle to get the clutch bellhousing off.

https://www.flickr.com/photos/144556909@N08/shares/S39G82

I was expecting to find something broken inside, to do with the clutch release mechanism, but no it was all fine. Turns out that the cable operated lever had slipped on the shaft. A bit annoying as I didnt have to spend 2 1/2 days taking it all apart, just needed to reposition and tighten the lever.

However, having taken it all apart I have noticed a couple of things that I am not overly happy about.
1) It's the original 924 driveline with 20mm shafts, I had been lead to believe it had been upgraded to 944 driveline with 25mm shafts.
2) It has a 924 215mm friction plate (because of the shaft size) but is RV8 flywheel and cover plate which really requires 240mm fiction plate

What is the safe HP and Torque limit for the 20mm shafts of the 924? My engine makes ~200hp and ~200ft-lbs torque but am intending to up this in the future to ~230hp / torques. The factor here is that this engine delivers the torque from lower down the rev range and redlines at about 5700rpm which is quite a bit lower than the Porsche turbo engines.

Logic tells me to upgrade to the 944 driveline and the 25mm shafts but its not really planned in the budget. This is a track-day (circuit) car so will get pushed quite hard.

Comments / input welcome and appreciated.
_________________
924 GT "8 Ball" track car project
944 Lux rolling project, nearly done
Back to top
View user's profile Send private message
nickthompson  



Joined: 26 Mar 2013
Posts: 840
Location: Central Georgia

PostPosted: Tue Aug 30, 2016 11:55 pm    Post subject: Reply with quote

I think raceboy has run over 230hp on a 20mm input shaft.
_________________
81 924 N/A 1.8t swap in progress.
Back to top
View user's profile Send private message Yahoo Messenger
prophead  



Joined: 12 Jul 2016
Posts: 28
Location: Falkirk, Scotland

PostPosted: Sat Sep 10, 2016 2:43 am    Post subject: Reply with quote

I decided to go for the upgrade to 944 Transaxle and Torque tube for peace of mind but primarily to make it easier to get the clutch assembly right.

anyway, the replacement Transaxle arrived today and I am very pleased. It came complete with nearly new mounts (mine are shot), and the shaft coupler. They had even cleaned and repainted it, result. Think this has to be the best ebay bargain I have ever had - I won it for £52 (~$45). Admittedly it cost me more than that to ship it but still a bargain.

https://www.flickr.com/photos/144556909@N08/shares/r1KZ6b

Next mission is to drop the rear suspension so that I can get the torque tube out.
_________________
924 GT "8 Ball" track car project
944 Lux rolling project, nearly done
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    924Board.org Forum Index -> Engine Transplants All times are GMT + 11 Hours
Goto page 1, 2  Next
Page 1 of 2

 
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