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Old 09-08-2011, 11:17 AM   #226
Matt Monson
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For a second there before I read through, I thought that was the 914 all in a ball. I was gonna cry. Glad to hear that it's something all together different...
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Old 09-08-2011, 09:28 PM   #227
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I did too! Quite shocking for a few moments.
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Old 10-01-2011, 03:44 PM   #228
luksicman1
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as being the proud new owner of an ej20g ver. 2 sti swapped legacy... I highly, highly, highly recommend going with one of these.... The ver. 7 is already switched to the semi closed deck block which will be better for ax racing because it will keep running cooler, I have fully closed deck and that thing gets hot! Even with the fmic, I need a hood scoop right now to help out with cooling, but I have a ver. 1 leggy that didn't even hav ea hood scoop so I have to custom fab. one, but yes anyways, these engines can run crazy hp, all jdm sti engines are fully forged deck, and have cryo treated gears so no problem with the 5spd tranny, and yes it is alllll about the turbo!!

let me repeat that again, all about the turbo! As for rpm range, all the jdm
sti engines have more agressive tuning stock, mine rev's up past 7k I know that, I never test it more than that though, rarely even have to even get up to that much haha, I have the stock 16g turbo which spools a little later for high rpm power and tq. each maxing out at 5500 rpm, I saw a vf28 turbo on nasioc for sale a While back, it might stilll be on here, but the vf28 is one of the older jdm turbos, You want either the vf28 or one around the similar year or size.... This turbo was made for rallycross, it was a pretty rare one, the guy was only selling for 500 shipped too, and they start spooling at 2800 rpm and reach full spool by 3500 ! I dont even start spooling up until 3300... so you can see the difference, this is one of the lowest rpm ( torquey, low end power) turbos that they made for subies... Highly recommend looking up the old vf ihi turbos... On wikipedia I think there is a thread that goes over all of them and will tell you all the spool up rates and exactly what you need to know, you want a low end power, really quickly spooling turbo, thats exactly what the vf28 was... look it up! good luck with the project.
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Old 10-02-2011, 02:49 PM   #229
outphase84
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Quote:
Originally Posted by luksicman1
as being the proud new owner of an ej20g ver. 2 sti swapped legacy... I highly, highly, highly recommend going with one of these.... The ver. 7 is already switched to the semi closed deck block which will be better for ax racing because it will keep running cooler, I have fully closed deck and that thing gets hot! Even with the fmic, I need a hood scoop right now to help out with cooling, but I have a ver. 1 leggy that didn't even hav ea hood scoop so I have to custom fab. one, but yes anyways, these engines can run crazy hp, all jdm sti engines are fully forged deck, and have cryo treated gears so no problem with the 5spd tranny, and yes it is alllll about the turbo!!

let me repeat that again, all about the turbo! As for rpm range, all the jdm
sti engines have more agressive tuning stock, mine rev's up past 7k I know that, I never test it more than that though, rarely even have to even get up to that much haha, I have the stock 16g turbo which spools a little later for high rpm power and tq. each maxing out at 5500 rpm, I saw a vf28 turbo on nasioc for sale a While back, it might stilll be on here, but the vf28 is one of the older jdm turbos, You want either the vf28 or one around the similar year or size.... This turbo was made for rallycross, it was a pretty rare one, the guy was only selling for 500 shipped too, and they start spooling at 2800 rpm and reach full spool by 3500 ! I dont even start spooling up until 3300... so you can see the difference, this is one of the lowest rpm ( torquey, low end power) turbos that they made for subies... Highly recommend looking up the old vf ihi turbos... On wikipedia I think there is a thread that goes over all of them and will tell you all the spool up rates and exactly what you need to know, you want a low end power, really quickly spooling turbo, thats exactly what the vf28 was... look it up! good luck with the project.
Dude. Really.
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Old 10-02-2011, 03:56 PM   #230
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LOL... Did you have to quote his randomness?

Can't wait to see the final outcome with the new suspension.
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Old 10-03-2011, 09:19 AM   #231
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Quote:
Originally Posted by BeBop86
LOL... Did you have to quote his randomness?

Can't wait to see the final outcome with the new suspension.
Just.. So much fail. I still... Speechless. Wow.
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Old 10-03-2011, 11:29 AM   #232
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Hopefully we get to see some videos of this thing in action!
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Old 10-04-2011, 12:56 AM   #233
Britain
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I am not sure if that guy actually read through my build or was just posting random thoughts. I would take the VF36 that I got over any other stock turbo...I love this think. I can't wait to move forward with the suspension overhaul so I can get the chassis to respond to the power that I have added. You will start seeing some major updates in about 2 weeks when the fab work begins....starting with a new, lighter rollcage.

-Britain
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Old 10-22-2011, 04:05 AM   #234
Britain
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Ok...this winters project has official begun. It was very difficult to make the first cut, but after four 12-15hr days we finally have a Lotus double a-arm front suspension mounted in a 914. In the spirit of the SCCA X-Prepared rules, I wanted to integrate the assembly into the unibody the best that we could without completely tubing the front of the car.

I began by mocking up the Lotus suspension assembly in the Lotus front sub-frame.



Then I secured the hub and built a quick jig to locate the chassis pick-up points to translate to the 914 chassis.



This is the completed front jig.



Start of rear suspension mock-up. The lower front mount is actually part of the Lotus chassis and not part of the rear sub-frame assembly so I had locate it separately for the jig to be properly built.



Driver side rear mock-up.



Driver side rear jig in place.



Driver-side front and rear jigs completed. I passed a solid rod through the lower pick-up points and it is interesting that the arm length of both front and rear are the same.

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Old 10-22-2011, 04:05 AM   #235
Britain
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With the jigs completed, it was time to remove the stock Porsche suspension. It is amazing how much time and effort one can put into the stock set-up and still not overcome the compromises.



With the stock stuff out of the way, it was time to put the Lotus jig in place.



Now....skip ahead 4 days of gruel work...and you get this...



Like I said previously, we did out best to integrate into the stock unibody of the 914 chassis in the spirit of the SCCA rules. Additional support will be added once the shock mounts are completed and the cage is tied in.

Here is the stock Lotus rotor/wheel mounted and suspension set on middle adjustment hole with lower a-arm parallel to the ground.



Side shot:



Inside look of the control arms and the lower subframe. One of the days I will strip all the undercoating and make it look all pretty.



Placement of the steering rack. Adjustment built in to allow for changes in both the control arm height and bump-steer. Again, additional bracing will be added to the mounts as the steering rack takes a lot of force.



Placement ideas for the front shocks. No, I won't be running two shocks...the outer shock will be replaced by an adjustable push rod and a rocker assembly will be designed and installed in this approximate arrangement.

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Old 10-22-2011, 04:06 AM   #236
Britain
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I have a few additional parts to design and make before completely finishing the front assembly. I will then move on to the rear as I believe that it will be a bit more challenging. With both ends completed, I will cut out the existing cage and built a new one that ties everything together.

-Britain
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Old 10-22-2011, 04:23 AM   #237
Loomin
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crazy!
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Old 10-22-2011, 08:55 AM   #238
Vdubtype1
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Talented. I should introduce you to my dad. He does a lit of race car fabrication. If you google xvette or Richard Ruiter he will come up. Goof work man. I love the 914
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Old 10-22-2011, 09:33 AM   #239
RonW
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Britain,
Wow, you and Brad has done some SERIOUS work since I saw all the parts in the trailer last weekend!!! Cant wait to see it move under her own power and move she will
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Old 10-22-2011, 10:16 AM   #240
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it will be interesting how you hand the rocker geometry. are you doing that so its easier to adjust the shock? move wt closer to center of gravity?

Last edited by RonW; 10-23-2011 at 12:17 PM.
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Old 10-22-2011, 12:54 PM   #241
Britain
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Mounting the shocks inboard will have several benefits. Easier to adjust, easier to package, unsprung weight savings, etc. It also will allow me to transfer the load to the bottom of the subframe.

-Britain
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Old 10-22-2011, 08:55 PM   #242
speedyHAM
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Adding more power and good suspension to that car should make it a contender in XP next year. I can't wait to see it again.

How much weight is the new suspension and cage adding?

Last edited by speedyHAM; 10-25-2011 at 11:43 PM.
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Old 10-25-2011, 12:41 AM   #243
Vdubtype1
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Are you keeping the lotus brakes? What master cylinder will you use?

Nice car
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Old 10-25-2011, 12:34 PM   #244
Britain
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I am planning on using the stock Lotus calipers and my current Tilton master cylinders/pedal assembly set-up. I haven't put much thought into that part yet.

-Britain
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Old 11-25-2011, 07:03 AM   #245
speedyHAM
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Any updates?
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Old 12-07-2011, 01:31 PM   #246
Britain
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Ok guys, sorry for the slight delay in posting updates. I ended up breaking my nose playing basketball and had to get surgery to get it fixed which forced my to cancel one of my trips down to Cali to work on the car. I did however make it down there this past weekend and made good progress.

This first bit of work that I had completed before making the trip down was the inboard shock rocker assemblies. I had the plates waterjet cut and the bearing carriers machined locally.



Here are the rockers in place on the car. Still need to complete the pushrod to the control arm and get the shocks that I plan to run.



Here is the front suspension rockers viewed from inside the fender wells. I also cleaned up the sheet metal cutouts and made clearance for the steering rack where it passes thru.



Front fender well with the front suspension jig in place. I mounted this back in place to get the wheelbase measurements to the rear suspension.



Speaking of the steering rack, the steering shaft is completed. Had to interface between the Lotus splines and the Porsche splines. Both shafts where machined the same diameter and a metal sleeve was made and welded in-between. I had to section the sheetmetal to allow the steering shaft to pass thru when the steering rack is at the upper mounting location.

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Old 12-07-2011, 01:32 PM   #247
Britain
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Now on to the rear suspension.

First up was to cut the front half of the trunk floor and shock towers out.



Next we cut out the old trailing arm suspension ears.



After lots and lots of grinding, this is what we ended up with...lots of space to work with.



To start, we constructed a jig that runs the entire length of the car and reference the mounting locations for the rear suspension to the front suspension. This allows us to put everything in alignment front and rear and side to side.



Side view of the location of the rear suspension in reference to the transmission. The custom axles are going to be around 23" long and require a custom outer stub-axle to be machined.



Here you can see the jig running from the front suspension to the rear.



The rear sub-frame will be attached to the car in 6 locations and will hold the complete rear suspension as well as the engine and transmission. This is the lower bar going into place. You can see in the foreground the bung that was welded into the chassis.



This is Teddy, the owner and machinist at Mavrik Motorsports, the shop where I am constructing this contraption. He is notching the tubing for the rear sub-frame.



Lower sub-frame bar going into place.



I will be back down there this coming Sat. and the plan is to complete the rear sub-frame and start working on the new cage.

-Britain
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Old 12-09-2011, 02:14 PM   #248
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Excellent work Britain, enjoying watching this thing come together.
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Old 12-09-2011, 03:24 PM   #249
Britain
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Thanks man...I am going back down to SoCal tomorrow and should be able to knock out the rear subframe.

_Britain
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Old 12-14-2011, 12:22 AM   #250
Britain
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Just got back from another 4 days in sunny SoCal working on the racecar. 12-15hrs days, but we got a lot done. Check it out.

Lower bars of the rear sub-frame completed. These two bars took 5 attempted to get right. They had to contact 4 points with two compound bends and angled cuts. They intersect the frame rails in the front and the transmission mounts in the back.



Side view of the lower sub-frame in place without the engine and transmission in place. Used an extra 901 nosecone to locate the transmission mounts.



Jigs in place to locate the proper pick-ups points for the upper mounts. The upper mounts are in-board 1/4" to achieve more negative camber compared to a stock lotus.



Rear suspension control arms in place at the upper pick-up point. Additional rear body mount added for the upper mount bar to hit the chassis.



Rear Lotus wheel mounted on the car.

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