Ozdat Home Feature Cars Ozdat Classifieds Event Calander Links Trade Link Tech Resource Merchandise Donate Web Mail
It is currently Thu Jul 19, 2018 8:30 pm

All times are UTC + 10 hours [ DST ]




Post new topic Reply to topic  [ 12 posts ] 
Author Message
PostPosted: Thu Jul 12, 2012 8:43 pm 
Offline
User avatar

Joined: Fri Jan 07, 2005 5:28 pm
Posts: 228
Location: Hobart, Australia
I'm thinking of using E85 fuel or similar in my SR20DE S15 Autech EFI n/a rally car Datsun 1600. I heard they might need JDM 100 RON.

The motor will be left completely standard (with standard Autech ECU, 11.7:1 compression, 272 degree cams). I have 3/8 fuel lines, a 180B fuel tank (10 Litres over standard).

But I am thinking that if I go with E85, I might run out of fuel, mid stage through a rally; as I heard fuel consumption can be up to 30% or more.

Can I use E85 for track use and or mix with 98 RON for rally (to keep the octane up)? We don't have 100RON here in Tassie. We have E85 at only one service station in Hobart, Avgas (100RON) at the airport or BP ultimate 98 from a fair few of servos.

Thoughts on type of fuel to use?

Any help appreciated.

Mark

_________________
Datsun 1600/H510 PRC Rally Car - L20B under 2 litre, EFI, 5 speed Hollinger, 5.1 LSD.

Datsun 1600/H510 PRC Rally/Road Car - L20B under 2 litre, downdraft webber, extractors, 5 speed.

Datsun 1600/H510 Clubman Rally Car - Autech SR20 EFI, SR20 "Option 1" copy, 4.8 LSD.


Top
 Profile  
Reply with quote  
PostPosted: Thu Jul 12, 2012 9:18 pm 
Offline
Donating Member
User avatar
Donating Member

Joined: Wed Feb 18, 2004 4:13 pm
Posts: 609
I thought (and have read a lot) 11.7 was fine with pump fuel. even 95

nice engine! how are the headers fitment with the 1600? if your using Autech headers. clearance issues?


Top
 Profile  
Reply with quote  
PostPosted: Thu Jul 12, 2012 10:30 pm 
Offline
User avatar

Joined: Thu Aug 26, 2004 1:43 pm
Posts: 223
Location: ADELAIDE
With that sort of compression plus the fact it is efi i would be using premiun unleaded or if you can afford it Elf. As to go to E85 you will need to change a few things with the fuel system plus probably best to stay with something readily available.

E85 is actually already blended with premium unleaded. Also a fuels octane rating isnt the only thing to consider when choosing the right fuel for you, octane is related to an engines ability to resist knocking/detonation so this combined with a high oxygen content.

Do you have control fuel or a approved fuel list for your rally class?

_________________
Jason
1600 Historic Touring Car


Top
 Profile  
Reply with quote  
PostPosted: Fri Jul 13, 2012 8:17 am 
Offline
User avatar

Joined: Fri Jan 07, 2005 5:28 pm
Posts: 228
Location: Hobart, Australia
I am not currently planning on using the Autec headers in the 1600. I have an off-the-shelf Stewart Wilkins Rally set for SR20 n/a in a 1600, that I am aiming to use. I may modify the Autec ones at a later stage, but main aim is to get the car going for now. Mainly using the Stewart Wilkins ones as I :

1) already had a set anyway
2) convenience (fit straight in clearing the idler arm. Although they are slightly too low for rallying near the gearbox in my car - will modify as I want maximum protection from rocks, etc - ie need to be higher towards transmission tunnel near gearbox.
3) possible negligible difference in power output.

Re fuel. Staying with 98 RON would be the easiest option and most appealing - but I don't want to blow the engine up. As long as the fuel is commercially available I am fine. Might still aim for a blend of E85 (50%? or even 20% to keep octaine at or above 100), but any advice/thoughts is still good. Some still say 100 RON though.

Anyone else use these engines?

http://www.camsmanual.com.au/pdf/10_gen ... 2012-2.pdf

Mark

_________________
Datsun 1600/H510 PRC Rally Car - L20B under 2 litre, EFI, 5 speed Hollinger, 5.1 LSD.

Datsun 1600/H510 PRC Rally/Road Car - L20B under 2 litre, downdraft webber, extractors, 5 speed.

Datsun 1600/H510 Clubman Rally Car - Autech SR20 EFI, SR20 "Option 1" copy, 4.8 LSD.


Top
 Profile  
Reply with quote  
PostPosted: Fri Jul 13, 2012 10:37 am 
Offline
User avatar

Joined: Fri Dec 05, 2008 12:07 am
Posts: 624
What management are you using? To even think about using E85 you're going to need bigger injectors and a retune to suit. Power might be down too since there is less energy per unit in E85 (it's great on turbos though).

_________________
Image


Top
 Profile  
Reply with quote  
PostPosted: Fri Jul 13, 2012 6:52 pm 
Offline
User avatar

Joined: Fri Jan 07, 2005 5:28 pm
Posts: 228
Location: Hobart, Australia
I'm using the standard Autec ECU. I will use 98 octane to start with and see how we go.

Ta

_________________
Datsun 1600/H510 PRC Rally Car - L20B under 2 litre, EFI, 5 speed Hollinger, 5.1 LSD.

Datsun 1600/H510 PRC Rally/Road Car - L20B under 2 litre, downdraft webber, extractors, 5 speed.

Datsun 1600/H510 Clubman Rally Car - Autech SR20 EFI, SR20 "Option 1" copy, 4.8 LSD.


Top
 Profile  
Reply with quote  
PostPosted: Sun Jul 15, 2012 12:24 pm 
Offline
Guru
User avatar

Joined: Tue Mar 04, 2003 10:09 am
Posts: 2620
Location: Lonsdale, South Australia
You Have PM

_________________
A little knowledge is a dangerous thing.
www.datsport.com


Top
 Profile  
Reply with quote  
PostPosted: Sun Jul 15, 2012 12:40 pm 
Offline
Guru
User avatar

Joined: Tue Mar 04, 2003 10:09 am
Posts: 2620
Location: Lonsdale, South Australia
Back in the day with 11.5:1 L blocks I used 10% methyl benzene now sold as toluol.
this will give over 100 RON with 98.

Note that toluol acts as a catalyst for methanol when mixed with petrol.
I have brewed many a mix over the years.
petrol 85,toluol 5, methanol 10, is a good mix with out changing injectors. the viscosity increase of the toluol is balanced by the
methanol. the methanol negates very cold temp issues with toluol. No probs with max 10%.

http://en.wikipedia.org/wiki/Toluene


cheers
Baz

_________________
A little knowledge is a dangerous thing.
www.datsport.com


Top
 Profile  
Reply with quote  
PostPosted: Mon Jul 16, 2012 7:18 pm 
Offline
User avatar

Joined: Fri Jan 07, 2005 5:28 pm
Posts: 228
Location: Hobart, Australia
Thanks Baz. Will do.

_________________
Datsun 1600/H510 PRC Rally Car - L20B under 2 litre, EFI, 5 speed Hollinger, 5.1 LSD.

Datsun 1600/H510 PRC Rally/Road Car - L20B under 2 litre, downdraft webber, extractors, 5 speed.

Datsun 1600/H510 Clubman Rally Car - Autech SR20 EFI, SR20 "Option 1" copy, 4.8 LSD.


Top
 Profile  
Reply with quote  
PostPosted: Mon Jan 09, 2017 2:30 pm 
Offline

Joined: Mon Jan 09, 2017 2:28 pm
Posts: 1
Thread from the dead. I am thinking of also running E85 for an Autech going in a Datsun roadster. Can anyone provide an update as to how to do this? Can the stock Autech ECU support E85? What tuners can help with this? Thanks


Top
 Profile  
Reply with quote  
PostPosted: Mon Jan 09, 2017 4:25 pm 
Offline
Guru
User avatar

Joined: Tue Mar 04, 2003 10:09 am
Posts: 2620
Location: Lonsdale, South Australia
Goldhawg wrote:
Thread from the dead. I am thinking of also running E85 for an Autech going in a Datsun roadster. Can anyone provide an update as to how to do this? Can the stock Autech ECU support E85? What tuners can help with this? Thanks


Contact PLMS, they have done this on a few autech rally cars. You will need a different Nissan ECU to accept the nisstune chip set.

_________________
A little knowledge is a dangerous thing.
www.datsport.com


Top
 Profile  
Reply with quote  
PostPosted: Tue Jan 10, 2017 7:56 pm 
Offline

Joined: Wed Mar 16, 2016 5:25 pm
Posts: 35
I have spoken to Pete about this. There is no fuel flex sensor for the ECU he uses which from memory is a S14 DE ECU. He said you can run straight E85 and you can get about an extra 10-15hp.

My question is, if there is no fuel flex, and you fill your tank and the ethanol/petrol ratio isn't correct. How much effect will this have on the engine? Is it possible to add straight ethanol to the tank to get the correct ratio? I ask this because I read somewhere that when you fill up at the fuel station you will never get the same ratio each time..


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 12 posts ] 

All times are UTC + 10 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 2 guests


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 post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group