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Old 06-11-2013, 09:26 AM   #51
CatfaceType-R
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With that 5 speed, you might have more fun with a larger hotside for the turbo, it's already going to be nice down low, a bigger hotside will really help your top end. In fact, your motor will love it...

All the best, sweeeet build.

C

Edit: saw u talking about a 6 spd, will be quick with smaller hotside.
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Last edited by CatfaceType-R; 06-12-2013 at 01:39 PM.
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Old 06-27-2013, 11:20 PM   #52
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Quote:
Originally Posted by CatfaceType-R View Post
With that 5 speed, you might have more fun with a larger hotside for the turbo, it's already going to be nice down low, a bigger hotside will really help your top end. In fact, your motor will love it...

All the best, sweeeet build.

C

Edit: saw u talking about a 6 spd, will be quick with smaller hotside.
I would think the quick spool of the small turbine would be best with longer gearing (5 speed) where the engine would spend more time at lower revs. Why do you think otherwise? I do not have any previous turbo experience, so I am not saying you are wrong, only trying to understand your rationale.

Thanks, John
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Old 06-27-2013, 11:40 PM   #53
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Quote:
Originally Posted by jdogma View Post

I would think the quick spool of the small turbine would be best with longer gearing (5 speed) where the engine would spend more time at lower revs. Why do you think otherwise? I do not have any previous turbo experience, so I am not saying you are wrong, only trying to understand your rationale.

Thanks, John
Gearing is only 'longer' if you're revving as high. When an engine is out of efficiency or manifold.pressure ratios are getting shifty, that sucks. Tq plummets, linear acceleration drops ans.times are slower.

Besides, taller gearing makes for higher load and lower spool rpm.
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Old 06-28-2013, 03:40 AM   #54
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You should build a couple of those... Just sayin.. I can think of a few people that would buy something like that.
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Old 07-08-2013, 06:50 PM   #55
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You should build a couple of those... Just sayin.. I can think of a few people that would buy something like that.
Oh yeah! Didn't make molds for nothing -lol. The idea is for a trackday car that will be available finished or in kit form, and designed around Subaru drivetrains. The Subaru drivetrain is about the only Japanese drivetrain with a longitudinal layout, allowing a low rear deck. You will notice that most mid engined cars with transverse layouts have high rear decks and are rather awkward looking. The longitudinal layout also results in better weight distribution, so that for the Carma Wolf, the weight distribution is not changed by the fuel load. Another advantage of the Subaru engine is the low center of mass. I am sure that Porsche stuff could be substituted, but one of the design criteria for this car is that it be in the Ariel Atom price range or less.

Sorry for the long absence, but I've been working on the headlamps - more of a problem than I anticipated. I should have some LED headlights in a couple of weeks!
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Old 07-10-2013, 01:12 AM   #56
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Glad to hear. I may be in the market for another track car in the not-to-distant future. Keep us posted!
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Old 08-27-2013, 05:29 PM   #57
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Got some prototype headlights on. Made them from available LEDs and housings. Also have some LEDs for turn signals that will fit under the outer lenses, but have to have the housings machined, which will have to wait. The wires are run for them. Since the wires go through the wing, they were run at the same time the headlamp wires were.

The fender design was not done with room for headlights at DOT required height - 22 inches, so that is why they are not flush. I would prefer flush, but could not make it happen without new fender design or making my own LED optics and heat sinks - and that would be very experimental. http://s1284.photobucket.com/user/jo...ml?sort=2&o=22

The car is not at rear design ride height - 5 rather than 3 inches, so the rear fender fit and rear tire camber (~ 0) look strange. The lights are pure white and very bright.

http://s1284.photobucket.com/user/jo...ml?sort=2&o=23

The headlights were a major pain because I decided to cast my own lenses and had to make inner and outer molds for them. I also decided to do LED headlights so the car would have something that looks original and not straight from the parts store. Nothing against cheap easy solutions, but couldn't find any that looked acceptable. Understand they are not DOT legal, so for people needing that, something different will be required. Hella makes some decent DOT legal high and low beams that could be mounted between the body and fender. Maybe lights could be incorporated in the side mirrors. Yeah - haven't gotten them yet... Gotta mount the license plate too...

These photos give some idea of the thinking behind the car: A light, powerful trackday car, minimally streetable with serious downforce potential, and priced below the Ariel Atom. Both the front and rear wing are 72 inches wide and have a 16 inch chord. Aero calculations show that at 180 mph, standard temp and ~950 ft elevation (Road Atlanta), each wing could make over 1400 lb of downforce. That assumes clean air. The front wing is ~ 1/3 blocked (but will be ground effect enhanced) and the rear will not be in clean air. A rear diffuser will be added, and the large endplates are meant to seal off high pressure air from the low pressure in the diffuser area and under the rear wing. The low rear wing placement is to enhance the effect of the diffuser. A second rear wing could be added higher up. Flaps for the front wing are in the concept stage. 72 inches was chosen as a wing width because there are many wings available from lots of sources in that width. Daytona Prototypes and Trans Am cars both require 72 inch wings (much smaller chord for them, like 12 inch).

Gotta get the seat properly braced and upholstered, get insurance and start road testing before dyno work and track testing.

Sorry the photos are not showing up, but the links should be good. I think I linked to photobucket as in the past....

Last edited by jdogma; 08-27-2013 at 05:48 PM. Reason: photos not showing up
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Old 08-27-2013, 06:02 PM   #58
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skip this

Last edited by jdogma; 08-28-2013 at 04:07 PM.
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Old 08-27-2013, 06:37 PM   #59
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amazing, you do great work.

I can't wait to see some vids of your car going doing the street.

Last edited by juanmedina; 08-27-2013 at 06:51 PM.
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Old 08-27-2013, 09:40 PM   #60
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http://s1284.photobucket.com/user/jo...?sort=2&page=1

For that want to see the pics in full size and not the mobile site.

Last edited by Homemade WRX; 08-28-2013 at 11:32 AM.
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Old 08-28-2013, 08:56 AM   #61
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Quote:
Originally Posted by jdogma View Post
The fender design was not done with room for headlights at DOT required height - 22 inches, so that is why they are not flush. I would prefer flush, but could not make it happen without new fender design or making my own LED optics and heat sinks - and that would be very experimental.



The car is not at rear design ride height - 5 rather than 3 inches, so the rear fender fit and rear tire camber (~ 0) look strange. The lights are pure white and very bright.



Sorry the photos are not showing up, but the links should be good. I think I linked to photobucket as in the past....
Fixed the links (I just copy and pasted the "Direct" link from each photo's page).

Lights on:
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Old 08-28-2013, 11:32 AM   #62
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Guess my link wasn't good enough for you :P
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Old 08-28-2013, 04:08 PM   #63
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Thanks Patrick! I knew how, then forgot, now know it again. Hope it sticks.
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Old 08-28-2013, 05:47 PM   #64
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Looks great!
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Old 08-28-2013, 10:56 PM   #65
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Nice Job. Have any night time shots of how well they illuminate the road ahead?
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Old 08-29-2013, 01:15 AM   #66
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Looks really good! I WANT ONE!!!
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Old 10-08-2013, 08:34 PM   #67
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Default Mirrors

[IMG][/IMG]


Got Mirrors from racemirrors.com - great guys. They are very light. I would have liked to mount them on the body but that would require custom work, so for now they are on the fenders like most open cockpit 2 seat sports race cars. Not sure why that is the common practice...

The plexiglass wind deflectors work great. Without them it was terrible. Will resume testing when fire system is fully installed. A fire with composite body usually involves the body very quickly. The resins in both fiberglass and carbon composites are essentially solid gasoline... I would feel pretty awful sitting by the side of the road watching it burn when there could have been an easy way to put it out.

Last edited by jdogma; 10-08-2013 at 08:42 PM.
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Old 10-09-2013, 02:13 AM   #68
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almost every picture link in here has a broken link lol
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Old 10-09-2013, 08:30 AM   #69
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almost every picture link in here has a broken link lol
lol Can you link to the posts that have broken links?

lol
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Old 10-13-2013, 08:40 PM   #70
jdogma
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Have started limited testing and data logging. Car felt good but not fast as I would expect. Figured it was not building boost. Found out that the Tial MV-R came with no springs installed (no prior turbo experience).... Put in 3 springs that add up to 1 bar ~ 14.7 psi. today. The difference was very dramatic. Now the car is really quick.

Last edited by jdogma; 10-13-2013 at 09:24 PM.
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Old 10-13-2013, 10:00 PM   #71
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lol Can you link to the posts that have broken links?

lol
nevermind, its cause I was on the nasioc app, stupid forumrunner; I wish they would switch back to tapatalk now that it has been redone!
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Old 10-19-2013, 04:45 PM   #72
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collecting data 1 trip around the block at a time

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Old 10-19-2013, 04:56 PM   #73
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That thing is so damn cool.........
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Old 10-30-2013, 05:48 PM   #74
jdogma
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we weighed the car today with 15+ gal of fuel (~ 3/4 full), body on, fire system in, laptop in car.

1746 lb 37/63% driver should make it ~40/60

Car has come out under target! This car has good carma.

Fuel wt is over 90 lbs so the car is 1660 lb dry. Would love to have carbon ceramic brakes, light race wheels, lithium batt...

Last edited by jdogma; 10-30-2013 at 11:44 PM.
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Old 10-31-2013, 12:02 PM   #75
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Quote:
Originally Posted by jdogma View Post
we weighed the car today with 15+ gal of fuel (~ 3/4 full), body on, fire system in, laptop in car.

1746 lb 37/63% driver should make it ~40/60

Car has come out under target! This car has good carma.

Fuel wt is over 90 lbs so the car is 1660 lb dry. Would love to have carbon ceramic brakes, light race wheels, lithium batt...
40/60 is awfully tail heavy. How will you combat understeer? Both power on and under heavy breaking?
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