Locofinn's Dmod Seven
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Author:  locofinn [ August 17, 2016, 8:38 am ]
Post subject:  Re: Locofinn's Dmod Seven

carguy123 wrote:
Boy a backfire could be interesting!!

I would notice it. I wonder if it is much if an issue in a turbo??

Author:  kartermdb [ April 26, 2017, 1:41 am ]
Post subject:  Re: Locofinn's Dmod Seven

How's the swap coming? Hope all is well

Author:  locofinn [ May 16, 2017, 7:58 am ]
Post subject:  Re: Locofinn's Dmod Seven

I just got the tune equipment last week. I hope to fire it up on Memorial Day. I post an update soon.

Author:  locofinn [ October 15, 2017, 12:23 pm ]
Post subject:  Re: Locofinn's Dmod Seven

It is alive. Fired up the motor last night with my tuner. No flames, no smoke, only small leaks and all data looks really good. My tuner is working on a performance tune this week and I need to get it on track before the snow flies to see if the rest of the fit up works. This only took 4 years to get this re-engineered and rebuilt. Very happy so far.

Spectre Mk2.jpg
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Author:  wrightcomputing [ October 15, 2017, 7:52 pm ]
Post subject:  Re: Locofinn's Dmod Seven

Congratulations on getting her running!

I drove the Jeep J2 at Nationals with Chris Kunkel which I'm sure you know has the same engine and that thing flew. Our tuner said it wasn't making full power either as the engine is designed to be all about economy so it takes a lot to overcome everything. The tuner drives a Sonic (I think) and without the 33mm restrictor he is pushing well over 300WHP.

The nice thing with the turbo is you have a more tuning options than you do with the NA alternative.

Author:  locofinn [ October 22, 2017, 7:24 pm ]
Post subject:  Re: Locofinn's Dmod Seven

Got the Super Seven Mk2 version on the scales. After about 1/2 hour of tweaking I dialed it in well with driver, helmet and very light fuel load.

LF=363, RF=349
LR=392, RR=379
Total Weight with Driver = 1,483 (1,420 DM Class Minimum)
Front =48%
Rear =52%
Cross Weights = Dead on at 742/741

Weight less driver is at 1,278 lbs and I'm very happy at this point knowing I have a pretty stout chassis design compared to most other Sevens. The car lost a net 40 lbs in this current 1.4Turbo configuration over the 12A rotary version. I was pleasantly surprised. I should be able to loose enough weight with future battery, wheel, brake and suspension upgrades to cover the additional aero bodywork I have yet to add and stll keep me pretty darn close enough to Class minimum.

I did not do the CG calculation. Maybe do that at t later time.

Author:  locofinn [ March 23, 2018, 3:13 pm ]
Post subject:  Re: Locofinn's Dmod Seven

Continuing on aero improvements, I added a removable rear diffuser.

I took three 24" x 24" x 1/8" sheets of ABS plastic sheet. Made three typical "tunnels" 14" wide by 24" long by cutting the sheets, heating the plastic and bending the sides. Glued the vertical strakes with ABS cement. I then added 10" x 42"x .060 aluminum sheet to transition from the floor of the car to the 24" long diffuser. I used Ludwig (panel) clips to slip in the aluminum leading edge of the diffuser assembly and attach at the floor. For the back I use extruded 2"x2"x 1/16" aluminum fastened with rubber tee straps. The finished diffuser is the full 42" width of the the "book" chassis. I can take off the entire diffuser assembly in about 3 seconds. It is easy to reinstall install without lifting the car in about 10 seconds. Very secure also. Total cost of materials is about $65 US including rivets and all. I figure the ABS will hold up and retain shape better than aluminum for off-track excursions or road debris.

New rear fenders, adjustable rear spoiler and front air dam with splitter is next. Stay tuned. I have money and time finally.

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Author:  RandyBMC [ March 31, 2018, 1:42 pm ]
Post subject:  Re: Locofinn's Dmod Seven

That is an awesome rear diffuser! Nicely done sir.

Author:  locofinn [ May 24, 2018, 3:24 pm ]
Post subject:  Re: Locofinn's Dmod Seven

Rear adjustable spoiler and new 15" wide fenders to cover my bigger race tires.

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Author:  locofinn [ May 24, 2018, 3:29 pm ]
Post subject:  Re: Locofinn's Dmod Seven

Starting on front splitter. This will be part of a whole new front end held on by 4 QD pins. I will have to remove the splitter/front assembly as well as the rear diffuser to load and unload the car from the trailer.

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Author:  wrightcomputing [ May 24, 2018, 9:19 pm ]
Post subject:  Re: Locofinn's Dmod Seven

Nice, I'm looking forward to seeing the finished product. It's something on the list of things for me to do.

Author:  locofinn [ May 28, 2018, 4:39 pm ]
Post subject:  Re: Locofinn's Dmod Seven

Front aero mostly done. I included some pic of the framing. It is held in by 4 pins. I still need to add end plates on the splitter.

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Author:  seven13bt [ May 28, 2018, 8:24 pm ]
Post subject:  Re: Locofinn's Dmod Seven

Looking good. Welcome to limited aero. With the extra front downforce and the wider rear tires there may not be much change in the balance. But, all that new torque is going to be thrilling. :D

Author:  RandyBMC [ May 29, 2018, 12:53 pm ]
Post subject:  Re: Locofinn's Dmod Seven

Looks like a chipmunk with stuffed cheeks!

Nice work.

Author:  locofinn [ May 29, 2018, 1:59 pm ]
Post subject:  Re: Locofinn's Dmod Seven

RandyBMC wrote:
Looks like a chipmunk with stuffed cheeks!

Nice work.

Indeed. Not graceful but trying to make a brick aerodynamic has it's challenges within the SCCA rules. :lol:

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