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nathaninwa

Project Rex Killer, 240z LS3

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nathaninwa    1

I was 2500 race ready, then the hood, rear glass and cage door bars got installed. So let's call it 2600 now to be safe as fuel varies

 

I have a glass hood to install and wil do glass hatch and lexan rear window over the winter

 

It does have a full chromoly 10 point cage with dash bar

Edited by nathaninwa

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RebekahsZ    106

I think 2600 is what most of us consider "race weight." You will have to make weight loss a major priority to do much better than that.  ie-removing door glass, removing all of the door structure other than the skin, deleting headlights, heater, wiper motor, lexan windshield and quarter glass, lighter tranny, etc.  For me, roll up windows and windows that don't scratch is a major plus.  Wipers and a heater that has defrost capability is awfully nice too.

zccjdm.com has a really nice looking fiberglass rear hatch with integrated rear spoiler.  If I was going to lexan rear window and fiberglass hood-I would consider that hatch.  If I build a second Z, it will have that hatch from the outset.

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nathaninwa    1

I'm with you, heater and side glass are a must. I did get rid of the stock heater box in favor of an old engine cooler setup I had, just built and shroud around the cooling fan and I have defrost vents. That still needs installed tho, the heater line is looped inside the cabin for now. I'd like to get some led headlights, but having troubles finding some with plastic lenses

 

I figure with the hood, hatch and lithium battery along with some door cutting and other random stuff, 100lbs is doable. I need to pull the tranny, and may cut the allowed 6 square feet out of the tunnel iirc and re sheet metal with .040 alum and I like the stock seats, but will hold saw them up when I recover em.

 

But went to the dyno today and left all sad faced after learning about autos and dynos! My 10.7 pass at 132 was done with an off the trailer 415whp. After some fueling and slight timing changes the day ended at 460/400 and it's still makin good whp out at 7300 or so. I'll get the graph posted tomorrow. But I got the data I need for a proper converter, and I think I can get 10.0 out of this combo first thing next season after the minor changes and some aero mods

 

That website you posted is where my hood came from already! And we have talked about the hatch, along with doors and fenders. The doors and fenders are a little out of my budget but the hatch is affordable along with the cowl setup. I may revamp the hoods height as I don't need that much and I really like the stocks hood appearance, so I may take about an inch out of it

Edited by nathaninwa

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RebekahsZ    106

I haven't heard that much about how much fenders save in weight. My CF hood does a lot (I haven't weighed them comparatively), but removing the steel hood was a 2 man job and the CF hood I can lift off myself (most of the trouble is with the hood pins and akwardness of the thing).  I keep it on a hinge most of the time for ease of opening.  Once I see your dyno graph I will have some questions about your cam (to learn, not to try to teach).

 

Keith

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Zfan1    10

The fenders are light, not going to gain much there. My 1971 240Z with a 4L80E and LSX iron block is a pig, 2900 and some change with my 200 lb butt planted in it.  My old set up was a 416 rwhp 6 liter and it went a best of 10.66 at 123, you have a lot left in her with that mph!

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nathaninwa    1

That's good time with that setup. I'm trying to get back one more time even on this converter to see where the new whp puts me for mph

 

I'd have to price out an intake, it would be competitive for sure, my problem is cylinder heads. I can get an old 5.3 block but need heads to verify port location and runner alignment

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1969honda    1

Nathan, if you hit the LS1tech.com marketplace it seems like there are always stock heads to be had. Here in Utah they are constantly for sale on the local classifieds for ~$200-400 a set depending on casting number and condition, sometimes far less. If you need s mock up set let meet know and I'm sure we can find some

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nathaninwa    1

I got the phone call last night I have been waiting for. My buddy with the rx7 is considering alum heads for his 421. What that means for me and our race is I get to turbo charge it now. We had agreed on my ls3 and his cast iron headed stroker, but I always told him if he Gos with the AFR heads he wants I'm at to much of a power deficiet that I get to turbo. Well, the time has come

 

Now to start thinking about what to do. An s475 is just to big to package with what I have left for room, so I'm looking at the smaller s256 and running twins maybe or possibly a smaller package 75mm precision turbo. I was looking at twin s360's as well but room is really at a premium

 

Either way an ETS 4x12x24 inch core will fit up front

 

Just so many turbos to pick from. I'm grabbing an eBay gt45 at lunch from another buddy for sizing things up

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mistafosta    10

That's good time with that setup. I'm trying to get back one more time even on this converter to see where the new whp puts me for mph

 

I'd have to price out an intake, it would be competitive for sure, my problem is cylinder heads. I can get an old 5.3 block but need heads to verify port location and runner alignment

 

Totally understandable. If I had an extra set laying around, I'd send them your way, but ls7 heads are few and far between

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nathaninwa    1

Well not much got done over the weekend. I have almost a 1300 square foot house with a 1300 square foot daylight basement that has my 20x20 garage, second bath, laundry and a reck room. We don't use the reck room much so I cut a 7-1/2 foot hole in the wall to open the garage up to the reck room adding an additional 15 feet of depth and about 25 feet of width in all. I'm in process of moving all my tooling to the new area so the original garage can hold both cars with breathing room around them. I'm excited for this

 

But I did get the Intercooler mocked up. It's where the grille would be forward of the torsion rods, plan is now to move the radiator ahead about 4 inches till it just touches the torsion rods and that opens up ample room to fit the s480 I decided to go with

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nathaninwa    1

Got moved along on this project today. Here are the F body 90/10 drag struts. You can see the stock one and the other how I trimmed off all the mounting hardware and fitted up a PC of dom tubing for it to sit in. I'll weld the tubing to the Z spindle and slice/bolt clamp the strut in. Just need to order the coil over sleeve

FullSizeRender_zpsoclapyyp.jpg

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nathaninwa    1

Kind of a random post. Weighing my options it seems buying a new set of Pistons is in order. So my thought is pull my current Pistons out and sell them. They have 35 miles on em, 4.065 stock bore ls3 drop ins, with stock length 6.098 rod. They are advertised at a 5cc dome and have huge valve reliefs. With .030 shaved off the head and a .040 gasket I've calculated it at 12.5-1 compression. Iirc stock heads and gaskets is right around 11.5-1

 

I'd have my custom cam for this compression for sale too

 

Pistons are wiseco's and cam is a Tick spec'd Comp Cams

 

If anyone is interested I can post a pic of the Pistons and cam card. Motor is still assembled and won't be driven anymore this year

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nathaninwa    1

Should be organizing the garage but couldn't help myself to get this started just a little bit

 

Here is the spindle modded and the strut sleeve machines to fit and he whole thing dry fit. I need to machine the upper strut shaft for the coil over top and install the the coil spring threaded body on the strut. Debating what spring to buy, I get just over 4 inches droop with this now and can just fit a 14 inch, 125lb spring. It should compress about 4.8 inches, where a 150lb spring will only compress 4 inches but not giving me the ride height in wanting

 

IMG_3460_zpsxj45ehv6.jpg

 

 

IMG_3461_zpsxjwbm1wf.jpg

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nathaninwa    1

It's been a while. Been expanding the garage and building intakes to make money for this project. I broke away and started finishing up on the coil over setup. It's turning out well and both struts should be mocked up tonight in the car

 

Tranny is out and converter is on its way to Jakes. I'll be moving from an 11 inch to a 9.5 inch unit

 

Martin Smallwood ground me a cam motions cam

 

And on Black Friday I picked up a billet s480 from Midwest turbo. It's not here yet but materials have been orders for the new log manifolds

 

New turbo Pistons are here too. Block is about tore down for the swap

 

FullSizeRender_zpsvjfftk74.jpg

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