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 Post subject: Re: Our little cultus racer
PostPosted: Fri May 03, 2019 10:50 am 
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Location: Cust NZ
Ok, so here's the other end of the sill.
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Remarkably level given the heights were set off the guards at 300. I guess you wouldn't want it nose down. Also not sure how relevant the lower in the rear theory is with competition spring rates. Mine will be softer than yours at 225 ( ie 450) in the rear and 325 in the front but I think near level is about right. The rest of my setup is much the same as Steve with a bigger bar in the rear, standard on the front, slight tow in at the rear and neutral or slight tow out at the front.


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 Post subject: Re: Our little cultus racer
PostPosted: Fri May 03, 2019 6:13 pm 
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Location: NZ
Great cheers I’ll lift the front a bit then. I spoke to chamberlains today and they may be able to make a new set of springs that will be able to work with the BC racing height adjusters and 575 lbs. sending them down on Monday to investigate


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 Post subject: Re: Our little cultus racer
PostPosted: Fri May 03, 2019 7:30 pm 
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Location: NZ
I got the new bit of plastic done today on the front bumper to splitter...looks good don't you think?

got the plug covered in carbon cloth for the fuel surge tank cover done.

start making side skirts tomorrow.

rang chamberlains with regards new rear springs that I may be able to use the bc racing height adjusters for.
don't really like how the chopped down springs sit...at least one of them anyway. will check to see if they can make a spring that will be short enough to include the adjuster but 575 lbs and not coil bind.


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 Post subject: Re: Our little cultus racer
PostPosted: Sat May 04, 2019 12:21 pm 
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This is the mod to the rear control arm that I was talking about so that you don't end up with a ridiculously short spring :
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 Post subject: Re: Our little cultus racer
PostPosted: Sat May 04, 2019 2:23 pm 
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Location: NZ
I see...does that fit a standard spring sam?


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 Post subject: Re: Our little cultus racer
PostPosted: Sat May 04, 2019 3:46 pm 
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I should measure it to be sure but from memory it was a 2.5"ID competition spring.


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 Post subject: Re: Our little cultus racer
PostPosted: Sun May 05, 2019 5:51 pm 
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Location: NZ
cheers...well i put a level on the sill and the car is pretty level so im going to leave it where it is. the splitter is 80mm off the ground...the side skirts are the same...carbon covering them now.....lot of work but taping the side skirts onto the car gave me an insight as to how it would look...mean!

what do you reckon of the front view?


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 Post subject: Re: Our little cultus racer
PostPosted: Sun May 05, 2019 7:18 pm 
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Location: Cust NZ
Looks good. You could just about take a mold off the bumper and splitter and then lay it up as one piece. Would have to be worth a few kilos getting rid of the plastic. The plastics are probably heavier than the panels. My hatch is completely gutted, so just the outer shell with lexan, it's very light so I doubt a fiberglass hatch would be any lighter. The plastic bumpers on the other hand are surprisingly heavy.


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 Post subject: Re: Our little cultus racer
PostPosted: Mon May 06, 2019 7:43 am 
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I’m kinda wondering where I can reduce some weight as I have added the splitter, skirts and soon a bigger wing. Plus the surge tank and it’s cover. Also a passenger foot rest. I have added probably 7 or 8 kg which is never great but I’m sure I can find that somewhere. I won’t be making a whole bumper as yet...so much work put into this one. I’ll cut some of the rear bumper off behind the wheel well. Remove steel from the inner doors and strip the hatch fully.


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 Post subject: Re: Our little cultus racer
PostPosted: Tue May 07, 2019 6:05 am 
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So what's the starting point, what's it weigh now?

There are some heavy items that would be obvious candidates:

Engine mounts, heavy as, could be rebuilt in alloy.
Rear upright/hub carrier, not the best part on the car, heavy and suspect shock mount. There must be something else that could be retrofitted, maybe something from another small fwd ( fiesta etc ).
Bumpers, haven't weighed them but I'm guessing 20kg might be possible with a one piece composite replacement.
Cage, T45 is 10kg lighter in a Fiesta cage.


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 Post subject: Re: Our little cultus racer
PostPosted: Tue May 07, 2019 7:10 pm 
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Location: NZ
good question Sam...i have a contact that will weigh the car at the local dump station. he will also weigh the front and rear separately as well for a front to rear check.

ill get that done as soon as I stop laying lawn or flying...which I have lots to do of in the next three weeks. so the weight reduction will be a little while away..

I believe ill only get the side skirts done in the next three weeks and the cover for the surge tank...other than that it will go onto the track in less than four weeks time. all a bit rushed unfortunately. still got the bloody tappet noise on and off...wonder if i should try some lighter chronos 300v. I won't change oils no matter what anyone says..my warranty on the engine requires the engine builders oil which he uses motul and put 10w40 in it....perhaps 5w40 or even 0w40. Ill ask him....its more when cold...rrrrgh


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 Post subject: Re: Our little cultus racer
PostPosted: Tue May 21, 2019 1:05 pm 
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Location: NZ
So I’m in London ....Again.....wish my life was more “catch me if you can” style with hot hostees falling all over me....glitz and glamour.....but it’s all about sore backs, trying to sleep, yawning, eating too much, talking contracts, being awake like right now at 3:33 am counting down the minutes and seconds before being able to go talk more contracts and pilot speak over breakfast. Wish some of them would talk race cars instead! 8-[

Week after I get home we get to run the car. The surge tank cover was a bit flimsy after I cleaned the foam out of it and so I laid another layer of carbon inside it with a few heavy patches to put the hold down mounts on it.
Then will fit the shift light on the middle of the top of the instrument panel so the lad can’t miss it..... 8-[
I got the zneolli discs surfaced. Found the source of the light disc shudder we have. Runout not on the spacer behind the hat but a 4 thou runout on the bloody hub itself! At the outside of the disc that’s over 12 thou....new wheel bearings a while ago....all tight and smooth. Maybe I did something when fitting the long arp studs or perhaps it’s always been like that. No time to remove and replace it or surface it....so I did a bodgy for now. I took the spacer and ran a 4 thou taper onto one side by holding it in the lathe and dti setting the taper then skimming it flat. Stuck the high and low side together hub to spacer....got less than 2.4 thou runout on edge of disc now....less than 2 on the left side. Trying the SPL500 znoelli pads next meet. Have to try bed then in beforehand and cool. Dunno how I’m going to do that. Running motul 660 brake fluid. Will bleed whole system....hoping for a much better brake now. Plus I’m going to try a little cheap fix. Because the booster is gone the ratio is not the same the znoelli guy says....can’t change the pivot point easily but I’m going to add 15mm to the end of the brake pedal. I’ll put 3mm doublers on each side of it but move the pedal down....only weld down the edges so no chance of cracking next to weld. Yes it will increase pedal throw but without the booster....it’s short anyway....leverage will be better....cheap to try anyway.


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 Post subject: Re: Our little cultus racer
PostPosted: Fri May 24, 2019 10:31 am 
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Very quiet around here.... 8-[


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 Post subject: Re: Our little cultus racer
PostPosted: Wed May 29, 2019 5:41 pm 
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got the surge tank cover mostly made now. few shots with the side skirts almost ready to clear coat and fit.


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 Post subject: Re: Our little cultus racer
PostPosted: Thu May 30, 2019 8:48 pm 
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finished the cover...all mounted and sealed for the surge tank.
mounted the side skirts today...what do you think?


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 Post subject: Re: Our little cultus racer
PostPosted: Thu May 30, 2019 9:24 pm 
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Location: Napier
Looks hot! Just needs a rear diffuser now to match the front lip and side skirts.....

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A Kiwi learning to fly in a Mk1.


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 Post subject: Re: Our little cultus racer
PostPosted: Fri May 31, 2019 8:33 am 
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underway Michael but not for this weekend...plus needs a better rear wing...then body complete.

This looks uneven because of the exhaust so if i leave the exhaust side open it matches the other side reasonably well...


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 Post subject: Re: Our little cultus racer
PostPosted: Fri May 31, 2019 12:44 pm 
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Location: Washington State
Nice job! Looks great. Have you driven it with everything on?


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 Post subject: Re: Our little cultus racer
PostPosted: Fri May 31, 2019 4:37 pm 
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Location: Napier
GT4LIFE wrote:
Nice job! Looks great. Have you driven it with everything on?


Not yet, this weekend me thinks.

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 Post subject: Re: Our little cultus racer
PostPosted: Fri May 31, 2019 6:41 pm 
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Location: NZ
s**t weather but yes this weekend...its not me driving it...its the boys turn.
but I'm all ready.
bloody lifter would not pump up....having grief with one or two of them. too much to change so a call to the engine builder to ask if he would be happy for me to try MLB8 additive....he was ok with it....low and behold no lifter noise now....so racing on....but fix needed in future...obviously right cams and solid lifters.


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