Welcome to the North American Subaru Impreza Owners Club Friday August 29, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Subaru Conversions

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 07-29-2013, 09:51 PM   #376
CGMDan
Scooby Specialist
 
Member#: 127883
Join Date: Oct 2006
Location: PDX
Vehicle:
'09 C63 AMG '99RSTi
'05 CGM STi - RIP

Default

pfft. Too bad it's so slow. You need to find a good engineer to design your stuff for you. Or a better driver.
* Registered users of the site do not see these ads.
CGMDan is offline   Reply With Quote
Old 07-30-2013, 12:10 PM   #377
K.Linchpin
Scooby Newbie
 
Member#: 97984
Join Date: Oct 2005
Chapter/Region: Tri-State
Location: Philly
Vehicle:
2002 MBP WRX Wagon
EJ207+VF37+4.11+DCCD

Default

Quote:
Originally Posted by Britain View Post
Here is the "fun" run video where I pushed the car another 0.5secs faster. You can see in a couple of spots where I run out of first gear and I am riding the rev limiter. You can also see towards the end where I am running out of front end grip due to aero load from the rear wing. Time for some front end aero improvements.

https://www.youtube.com/watch?v=gtSSZLxkqtI
Britan, how do you know it's aero related and not suspension setup related? How fast are u going when the front looses grip?
Btw, what's the new trans top out at in 1st? It looks like 2nd is a little tall, or maybe this course was really tight.
Is NLTS an option with your dog ring gear box or do u have that enabled? Shifts look really fast, so I wouldn't complain.
I've done a few really tight ax's in 1st and recall the engine breaking being really distracting. Maintaining precise speed (@ like 6-7 k) was not easy. I like it to glide mor like it does in 2nd. Maybe its less interfering in a 2wd car. Is engine breaking in 1st distracting at all to you?
K.Linchpin is offline   Reply With Quote
Old 07-30-2013, 02:22 PM   #378
Britain
Scooby Newbie
 
Member#: 247604
Join Date: May 2010
Chapter/Region: NWIC
Location: Hillsboro, OR
Vehicle:
1974 Porsche 914
1700lb AX Car w/ Spec-C

Default

Quote:
Originally Posted by K.Linchpin View Post
Britan, how do you know it's aero related and not suspension setup related? How fast are u going when the front looses grip?
Btw, what's the new trans top out at in 1st? It looks like 2nd is a little tall, or maybe this course was really tight.
Is NLTS an option with your dog ring gear box or do u have that enabled? Shifts look really fast, so I wouldn't complain.
I've done a few really tight ax's in 1st and recall the engine breaking being really distracting. Maintaining precise speed (@ like 6-7 k) was not easy. I like it to glide mor like it does in 2nd. Maybe its less interfering in a 2wd car. Is engine breaking in 1st distracting at all to you?
Some interesting questions here.

1. Aero. I know that it is aero related based on the amount of downforce the rear wing is producing and the setup of the car. The car is intentionally set-up on the loose side and when I hit speeds above 65mph or so I can start to feel the rear grip increasing to a point where I no longer have any oversteer. In fact, it is very hard to get the rear loose when I am running up at those speeds.

2. Gearing. At this point I am aware that I am geared properly and I am working on getting different ratios. 1st gear tops out about 60mph and you can see I am on the rev limiter in quite a few sections. 2nd gear is way too tall and drops me out of the powerband in the slow sections. A new 2nd gear is coming soon.

3. Shifting. Yes, I can do a no-lift shift. Manually at this point, but I have the electronics on the car to allow it to be done automatically. The shifting is so much quicker that the synchro box.

4. Engine Breaking. I use the engine braking to rotate the car. This is one thing I really miss with the 6-cylinder NA motor. At higher boost levels and high RPM's I can get some of this back. Possibly different in a 2-wheel drive car compared to a 4-wheel drive car.

-Britain
Britain is offline   Reply With Quote
Old 07-30-2013, 02:23 PM   #379
Britain
Scooby Newbie
 
Member#: 247604
Join Date: May 2010
Chapter/Region: NWIC
Location: Hillsboro, OR
Vehicle:
1974 Porsche 914
1700lb AX Car w/ Spec-C

Default

Quote:
Originally Posted by CGMDan View Post
pfft. Too bad it's so slow. You need to find a good engineer to design your stuff for you. Or a better driver.
Come on over Dan so I can kick you in the nuts
Britain is offline   Reply With Quote
Old 08-19-2013, 07:32 PM   #380
Britain
Scooby Newbie
 
Member#: 247604
Join Date: May 2010
Chapter/Region: NWIC
Location: Hillsboro, OR
Vehicle:
1974 Porsche 914
1700lb AX Car w/ Spec-C

Default

The Where2Race Porsche 914 had a great outing this past weekend at the NWR SCCA Solo Autocross #7 in Packwood, WA. Took overall top time both days and grabbed 2nd in PAX on Sunday. The course was fast and challenging, with several opportunities to make mistakes. The car ran great, new gearing was much better. Here is a video of my fastest run...enjoy.

Britain is offline   Reply With Quote
Old 08-20-2013, 06:11 PM   #381
K.Linchpin
Scooby Newbie
 
Member#: 97984
Join Date: Oct 2005
Chapter/Region: Tri-State
Location: Philly
Vehicle:
2002 MBP WRX Wagon
EJ207+VF37+4.11+DCCD

Default

Quote:
Originally Posted by Britain View Post
The car ran great, new gearing was much better. Here is a video of my fastest run...enjoy.

http://youtu.be/oFl0zJtdnQM
1 --> 2 shift = entering hyper space!

I think a 1 2 shift right after the first slalom would have improved your time even more so. 2nd gear is soo much shorter and useful!
K.Linchpin is offline   Reply With Quote
Old 08-20-2013, 07:31 PM   #382
Britain
Scooby Newbie
 
Member#: 247604
Join Date: May 2010
Chapter/Region: NWIC
Location: Hillsboro, OR
Vehicle:
1974 Porsche 914
1700lb AX Car w/ Spec-C

Default

I tried it both ways and holding against the rev limiter in this section was faster. Partially due to the entry into that corner and also due to the necessity to downshift into the tight slalom after the sweeper just 10secs after this.
Britain is offline   Reply With Quote
Old 08-25-2013, 03:05 AM   #383
revhead91
Scooby Newbie
 
Member#: 366424
Join Date: Aug 2013
Vehicle:
2005 wrx

Default

Britain. Love what you have done with your 914. Awesome all the way around. I have 74 914 with an ej18. I eventually will do full sti engine and tranny swap. I was curios though Are you using the subaru alternator and if so how did you wire it in your 914?
revhead91 is offline   Reply With Quote
Old 08-25-2013, 04:55 PM   #384
Britain
Scooby Newbie
 
Member#: 247604
Join Date: May 2010
Chapter/Region: NWIC
Location: Hillsboro, OR
Vehicle:
1974 Porsche 914
1700lb AX Car w/ Spec-C

Default

Yep, Subaru alternator. Hooking it in is simple...just wire it to the battery or the starter.

-Britain
Britain is offline   Reply With Quote
Old 08-25-2013, 09:53 PM   #385
scby rex
Scooby Guru
 
Member#: 104878
Join Date: Jan 2006
Chapter/Region: TXIC
Location: copperas cove
Vehicle:
02 wrxbastardchild
aw, MPS 2.34 breaking in

Default

That trans is very clean. What did you use or was it just media blasted?
scby rex is offline   Reply With Quote
Old 08-25-2013, 10:23 PM   #386
Britain
Scooby Newbie
 
Member#: 247604
Join Date: May 2010
Chapter/Region: NWIC
Location: Hillsboro, OR
Vehicle:
1974 Porsche 914
1700lb AX Car w/ Spec-C

Default

It is just ran through the parts washer. Might have been media blasted at one point in its life.

-Britain
Britain is offline   Reply With Quote
Old 11-04-2013, 01:28 PM   #387
dootlah
Scooby Newbie
 
Member#: 350328
Join Date: Mar 2013
Default

Very cool project. Do you happen to have anymore pictures of how you routed the catch can lines/coolant lines for the overflow/upper expansion tank?
dootlah is offline   Reply With Quote
Old 11-04-2013, 02:23 PM   #388
Britain
Scooby Newbie
 
Member#: 247604
Join Date: May 2010
Chapter/Region: NWIC
Location: Hillsboro, OR
Vehicle:
1974 Porsche 914
1700lb AX Car w/ Spec-C

Default

Thanks Dootlah!

Not sure what you are asking here. The Coolant overflow tank just connects with a single hose to the top of the reservoir tank on the intake manifold.

-Britain
Britain is offline   Reply With Quote
Old 11-04-2013, 06:29 PM   #389
dootlah
Scooby Newbie
 
Member#: 350328
Join Date: Mar 2013
Arrow

Quote:
Originally Posted by Britain View Post
Thanks Dootlah!

Not sure what you are asking here. The Coolant overflow tank just connects with a single hose to the top of the reservoir tank on the intake manifold.

-Britain
Britain,

Sent you a PM
dootlah is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Porsche 914 with subaru conversion malaga_red75 Subaru Conversions 3 01-04-2010 11:22 PM
My Porsche 914 Track Car soloracer Member's Car Gallery 19 06-25-2003 10:01 PM
EJ25 into Porsche 914!!! :) Clegg Mid West Subaru Owners Club Forum -- MWSOC 4 02-10-2002 12:39 PM
Project Porsche 914 Update tomrichardson Rocky Mountains Impreza Club Forum -- RMIC 14 06-19-2001 02:58 PM
Project Porsche 914 Update tomrichardson Rocky Mountains Impreza Club Forum -- RMIC 2 05-29-2001 07:42 PM


All times are GMT -4. The time now is 04:02 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.