User Login    
 + Register
  • Main navigation
Login
Username:

Password:


Lost Password?

Register now!
Fast Search
Slow Search
Google Ad



Browsing this Thread:   1 Anonymous Users



« 1 ... 42 43 44 (45) 46 47 48 49 »


Re: Turbo EFI A12 for under $1200. Discussion thread
No life (a.k.a. DattoMaster)
Joined:
2006/6/4 1:57
From Ballarat Victoria
Group:
Registered Users
Posts: 1309
Offline
Just a small update..

I put the smaller R32 turbo back on with the large cam. It still came on too late for my liking, So went back to the standard cam.

I wanted to play with the cam timing, so while the cam sprocket was off, I made it adjustable with 8 extra holes at two degree adjustments.

I first ran the std cam at 8 degrees retarded, 125Nm at 5500, 79Kw at 6900. Then 8 degrees advanced 132Nm at 5100, 74Kw at 5700

So it made more torque with the cam advanced but it fell on its face past 5800.

I understand that an 8 degree change is huge, but I had to starts somewhere. I think a mild cam that is slightly advanced would give good results. I do have a Wade 140 grind here somewhere, I think they are about 136 duration @.050 from memory. Probably worth a try anyway. The big 260@.050 cam was definately too big for the std head and manifold.

I roughly engraved the new dowel holes and the corresponding teeth to be able to change it without too much confusion.

Attach file:



jpg  Adjustable Cam Sprocket resize.jpg (176.62 KB)
6746_5704b7f1b9a2e.jpg 581X778 px

Posted on: 2016/4/6 8:01

Edited by sikyne on 2016/4/6 8:17:12
Edited by sikyne on 2016/4/6 8:18:52
Edited by sikyne on 2016/4/6 8:22:46
Edited by sikyne on 2016/4/6 8:25:39
Edited by sikyne on 2016/4/6 8:44:21
_________________
VIC DYNO HIRE
Transfer the post to other applications Transfer


Re: Turbo EFI A12 for under $1200. Discussion thread
Just popping in
Joined:
2016/3/22 11:58
Group:
Registered Users
Posts: 2
Offline
Any Update on this Simon..?

Kannan

Posted on: 2016/4/20 20:25
Transfer the post to other applications Transfer


Re: Turbo EFI A12 for under $1200. Discussion thread
Not too shy to talk
Joined:
2013/11/26 19:19
Group:
Registered Users
Posts: 34
Offline
Sikyne, using some of your ideas to try and head down a cheap efi turbo arrangement on the a12.
What size OD tube did you use for turbo manifold?

Posted on: 2016/5/3 13:05
Transfer the post to other applications Transfer


Re: Turbo EFI A12 for under $1200. Discussion thread
Quite a regular
Joined:
2014/7/13 14:18
From Western Sydney
Group:
Registered Users
Posts: 52
Offline
Hi currently trying to follow this build and do it myself, just wondering with the distributor, i dont have thr stock one, when i brought my 1200 it had a lucas distributor in it, just wondering if all is good to still use?

Attach file:



jpg  image.jpg (141.33 KB)
17908_575e123d0bf17.jpg 900X1200 px

jpg  image.jpg (156.66 KB)
17908_575e12580346a.jpg 900X1200 px

jpg  image.jpg (154.99 KB)
17908_575e127ac6016.jpg 900X1200 px

Posted on: 2016/6/13 2:55
_________________
1973 Datsun 1200 Sedan (work in progress)
FanaticsCo'*<~~~~
Transfer the post to other applications Transfer


Re: Turbo EFI A12 for under $1200. Discussion thread
Home away from home
Joined:
2014/5/28 6:09
From Creswell, Oregon USA
Group:
Registered Users
Posts: 557
Offline
Bumping to revive.

Posted on: 2016/7/28 21:20
_________________
An idea doesn't work unless you do.

Instagram @MD_Machine
Parler @MDMachine
Transfer the post to other applications Transfer


Re: Turbo EFI A12 for under $1200. Discussion thread
No life (a.k.a. DattoMaster)
Joined:
2009/4/30 7:57
From Adelaide
Group:
Registered Users
Posts: 1112
Offline
Endfab: I'm using 25NB sch40 steam pipe and butt weld fitting if that helps. It's a good match for the exhaust port size which you want to maintain to the turbo inlet, at this point the cross section reduces further to convert the pressure in the exhaust to velocity, which is how the power is extracted in the turbine. You want to avoid any expansions before the turbo as these waste energy.

Posted on: 2016/7/28 22:13
_________________
1200 Coupe A15E - ITB
Lamb Daiquiri - a man's cocktail!
Transfer the post to other applications Transfer


Re: Turbo EFI A12 for under $1200. Discussion thread
Moderator
Joined:
2001/5/3 7:04
From 48 North
Group:
Registered Users
Contentmaster
Usermaster
Posts: 31575
Offline
25NB is 25mm inside diameter? Seems a little small for the A12 exhaust ports which are 27x26 mm

Posted on: 2016/7/29 0:03
Transfer the post to other applications Transfer


Re: Turbo EFI A12 for under $1200. Discussion thread
Moderator
Joined:
2001/5/3 7:04
From 48 North
Group:
Registered Users
Contentmaster
Usermaster
Posts: 31575
Offline
DA70YO u can use any distributor with EFI, in particular the MegaSquirt ECU which Simon is using can use any points distributor as an RPM input

Posted on: 2016/7/29 0:04
Transfer the post to other applications Transfer


Re: Turbo EFI A12 for under $1200. Discussion thread
No life (a.k.a. DattoMaster)
Joined:
2009/4/30 7:57
From Adelaide
Group:
Registered Users
Posts: 1112
Offline
Nb25 is actually a bit bigger than 25mm id. Also,going square to cylindrical you use hydraulic diameter as a rule of thumb. The hydraulic diameter of a 26mm square port is 26mm.

Posted on: 2016/7/29 0:47
_________________
1200 Coupe A15E - ITB
Lamb Daiquiri - a man's cocktail!
Transfer the post to other applications Transfer


Re: Turbo EFI A12 for under $1200. Discussion thread
No life (a.k.a. DattoMaster)
Joined:
2006/6/4 1:57
From Ballarat Victoria
Group:
Registered Users
Posts: 1309
Offline
Hi Guys, I don't get on here quite as often as I used to.

I use the smaller NB25 Sch40 tube stated above for my A series turbo manifolds(inc. my race car). I usually split the tube where it welds to the head flange and spread it a little to match the ports and fill the split with weld.
The tube diameter being smaller than the ports helps with the turbine drive energy.

The next pipe size up from this is larger than the ports, and certainly not an upgrade when it comes to all round performance from a turbo manifold.

The Lucus distributor is fine to do the mod to, but the allthread has to be mounted a little lower (where the widest part curves under) to get a solid thread into the distributor body for the sensor mount. The trigger wheel has to be mounted lower to line up with the lower mounted sensor. I have done a Lucas unit and it looked quite good as I could machine a lot of the top of the dist body (down to the bottom of the original Vac advance hole)before fitting the ally cap. it made it quite short and neat looking.

Posted on: 2016/7/29 0:51
_________________
VIC DYNO HIRE
Transfer the post to other applications Transfer



« 1 ... 42 43 44 (45) 46 47 48 49 »



You can view topic.
You cannot start a new topic.
You cannot reply to posts.
You cannot edit your posts.
You cannot delete your posts.
You cannot add new polls.
You cannot vote in polls.
You cannot attach files to posts.
You cannot post without approval.

[Advanced Search]