Author Topic: Overseas new members ride  (Read 1704 times)

Offline Finnish Fireball

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Overseas new members ride
« on: May 28, 2019, 06:58:34 AM »
Hi folks, greetings from Finland

I just finished my slingshot and thought to share it with other FED maniacs. I built it with Super Comp in mind
so theres nothing that fancy technically, just basic proven good stuff. Pump gas 461cid topped with PromaXX
alu heads, 950cfm QF, Comp 306s flat tappet cam. PG with transbrake and 4000 stall converter. Rear is 9" that
I stuffed with Strange Pro alu pumpkin, 4.29:1 gear. 35 splines pro shafts, spool and pro brakes.

Now that it is finished I'd like to add blower, alky injection and...and...and you know how this disease is a never
ending story. But this season I'll ride it like that for couple weekends just to have fun. No goals, no pressure.





I'm fast. I can make five mistakes while others think.

Offline dreracecar

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Re: Overseas new members ride
« Reply #1 on: May 28, 2019, 08:14:07 AM »
Very nice

  However, the only issue I have based on the SFI spec here in the States is that the rear end uprite and the mount that is welded to it must go the full length of the uprite and also welded to the upper and lower framerails. A short tab mount like what is shown will not pass chassis cert over here by the rules

Offline Finnish Fireball

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Re: Overseas new members ride
« Reply #2 on: May 28, 2019, 08:57:30 AM »
You are absolutely correct with that, for 7.50 sec SFI it needs to be four bolts and like you describe. However, this chassis
has current and valid UK sticker for 8.50 like it is. So going faster means modifying that rear end. I might change it anyhow
before sticker expires. Thanks for pointing that out.
I'm fast. I can make five mistakes while others think.

Offline denverflatheader

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Re: Overseas new members ride
« Reply #3 on: May 29, 2019, 07:16:59 AM »
Finnish Fireball welcome, catchy paint scheme, would be well received here in America.  Im guessing your parachute has a big Blue Cross : )  Alan

Offline Finnish Fireball

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Re: Overseas new members ride
« Reply #4 on: May 29, 2019, 07:51:31 AM »
Thanks Alan, pretty neat idea for the chute hmmmmm.... time to go shopping  ;D
I'm fast. I can make five mistakes while others think.

Offline janjon

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Re: Overseas new members ride
« Reply #5 on: June 11, 2019, 05:13:17 AM »
Very nice car; I presume there's a similar tab with another two bolts hiding behind the caliper???
Interesting shifter mounting, as well. The shifter in my car is center mounted with the base offset a bit to the right of the steering shaft, and slightly inclined to the right such that the knob is about in line with the right grip. Do you have any other pictures of your shifter mounting?
Seeing your setup has me thinking of doing something similar. Might get a bit more kneeroom in what is a very tight cockpit. I gather you haven't run the car yet, are you gonna let us know how it goes?
John, Houston TX
Just keep the same amount of stuff on the right
as there is on the left. Seeing straight ahead is highly overrated....

Offline Finnish Fireball

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Re: Overseas new members ride
« Reply #6 on: June 13, 2019, 04:17:20 AM »
Yes John there's another tab hiding there. I have couple passes in a no prep T&T event on an airfield, there was no traction (1.5 sec 60ft) and no safety crew so I could not go flat out for the full length, still managed 9.100 with only 136 mph lifting early. I assume I'll catch the Super Comp 8.900 index at normal track conditions. I'm currently visiting US for four weeks and my next race is 4th to 7th of July when I get back home. I'll let you know how it goes. Thank you for your interest.

Here's a better pic of my shifter setup, works fine for me
I'm fast. I can make five mistakes while others think.

Offline Finnish Fireball

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  • Your Vehicle: Fireball Slingshot
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Re: Overseas new members ride
« Reply #7 on: July 08, 2019, 02:05:18 AM »
Update as promised

Car performed well, goes under 8.900 index easily. Best 60ft was 1.20, worst was 1.26. Not bad at my hp level. Fastest ET 8.84 / 144 mph leaving at 3700 rpm on trans brake (converter is 4000 rpm),
shift at 6600 rpm and against 6800 rpm limit at the trap. 8 psi in rear tires. Ten passes within a tenth or so. Track was not optimal every day, I got only one perfectly straight run. All others the car made sudden move left or right somewhere between 200-300ft out, twice reguiring lifting the loud pedal the rest I just drove through. I don't know what else it could be than traction that far out. It does not loose traction when wheelie ends.
I will experiment to raise wheelie bars next time out and get the front rise higher, just for fun because wheelies are nice. I just dont know how much change is too much, now it lifts the front some 10" up.

What a blast it was to be behind the wheel after a long pause. Slingshots simply ROCK!

I also weighted it, total is 1753 lbs me included, 405 lbs at front 1348 rear.
« Last Edit: July 08, 2019, 04:34:13 AM by Finnish Fireball »
I'm fast. I can make five mistakes while others think.

Offline THE FRENCHTOWN FLYER

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Re: Overseas new members ride
« Reply #8 on: July 08, 2019, 03:45:57 AM »
NICE