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Author Topic: 12 Sec combo  (Read 4402 times)
Garrick Clark
Sr. Member
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Posts: 499


« on: December 07, 2018, 18:32:16 pm »

Hi Racers.
I'm just wondering what would  the power and weight of a beetle with a standard ratio 15oo box with 4.125 R and P on 205 tyres need to be at to get into the 12's.
I'm trying to work out were I might be timewise  with my bug without going to the strip.
Bug is 1870lbs with me in it.
300 hp
1500 ratios with 4.125

Thanks.
Feel free to post your power/weight/1/4 times.
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Air cooled Engine builder
PPRMicke
Sr. Member
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Posts: 343



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« Reply #1 on: December 09, 2018, 11:39:25 am »

Hi Racers.
I'm just wondering what would  the power and weight of a beetle with a standard ratio 15oo box with 4.125 R and P on 205 tyres need to be at to get into the 12's.
I'm trying to work out were I might be timewise  with my bug without going to the strip.
Bug is 1870lbs with me in it.
300 hp
1500 ratios with 4.125

Thanks.
Feel free to post your power/weight/1/4 times.
214 hk
a link that you can calculate how much hp
http://www.wallaceracing.com/et-hp-mph.php
What you do is change the gearbox     ( 4.125  3.80 2.05 1.45 1.05)
/// Micke
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Garrick Clark
Sr. Member
****
Posts: 499


« Reply #2 on: December 09, 2018, 12:43:48 pm »

Hey thanks Micke.
So it calculates at 214 HP to do a 12 with a 1870lb vehicle. So I should be able to go lower than a 12 with my current HP. So long as I had the above ratios.
So Micke with my standard ratios what would you think my time would be.
I need street ratios really but still want to have a low times street bug.
Comes down to more power/less weight doesn't it.
« Last Edit: December 09, 2018, 12:54:03 pm by GARRICK.CLARK » Logged

Air cooled Engine builder
PPRMicke
Sr. Member
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Posts: 343



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« Reply #3 on: December 09, 2018, 19:07:27 pm »

Hey thanks Micke.
So it calculates at 214 HP to do a 12 with a 1870lb vehicle. So I should be able to go lower than a 12 with my current HP. So long as I had the above ratios.
So Micke with my standard ratios what would you think my time would be.
I need street ratios really but still want to have a low times street bug.
Comes down to more power/less weight doesn't it.
There are different ways to go if you want to use the car on the strip if you want to drive fast
To 99% it is the gearbox
You can change 3an's drive so it should go faster
After that you have 0.89 on gear 4 (so the peak speed is 230kmt @ 7200 rpm
The cheapest way is to have different large tires
Small on the strip big on the street
 
/// Micke
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richie
Hero Member
*****
Posts: 5567



« Reply #4 on: December 09, 2018, 21:15:46 pm »

It will break 1st gear trying Shocked

Stock 1500 1st gear just isn't up to it, but in an imaginary world where it didn't break Grin then it should run about mid 12s, trouble with a turbo car is you cant leave with max boost & hp so using 300hp in any 1/4 mile calc like the one Micke posted[which is a really good calc  Smiley ] wont give anywhere near accurate results, also it calcs based on 100% traction which you will not have, finally its rear wheel hp and I am guessing you are using flywheel hp?

Here's a few actual 1/4 mile times from cars/engines I have built

67 beetle 195rwhp N/A 1750lbs, regular radials 12.44@103[gearing to tall]
Same car with slicks and 280ish rwhp using nitrous 10.42@125mph

63 ragtop beetle 210rwhp high compression N/A 1735lbs slicks no burnout 11.56@116mph

56 oval beetle slicks 350rwhp drawthrough turbo approx. 1700lbs 10.63@128mph


850 Fiat with VW engine, just regular N/A pump gas 2276, approx 150 rwhp just under 1500lbs 11.91@109mph

 




cheers Richie
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Cars are supposed to be driven, not just talked about!!!   


Good parts might be expensive but good advice is priceless Wink
Garrick Clark
Sr. Member
****
Posts: 499


« Reply #5 on: December 10, 2018, 18:46:57 pm »

Hi Richie, Yes its flywheel power. The box I now have installed is the same ratio as my old 1500 box ,I can tell when I drive it. It feels the same. But its a KCR one. I'm hoping he put a few goodies in or did some tricks to it. its got a side plate on it and a S diff.
Dub shop Micro Squirt being fitted in Jan. So no more spark blow out + injection. Hopefully that will improve things.
So long as its quicker than the golf R boys I'll be happy.
« Last Edit: December 10, 2018, 18:58:51 pm by GARRICK.CLARK » Logged

Air cooled Engine builder
neil68
Hero Member
*****
Posts: 537



« Reply #6 on: December 10, 2018, 18:55:06 pm »

204 WHP
12.5 ET
2,045 lb/930 kg stock 68 Beetle
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Neil
Der Kleiner Rennwagens
'68 Beetle, 2332 cc, 204 WHP
12.5 seconds @ 172 KM/H (107.5 MPH)
Dynojet Test:  https://www.youtube.com/watch?v=M9B_H3eklAo
leec
Hero Member
*****
Posts: 2541


« Reply #7 on: December 10, 2018, 21:06:14 pm »

Hi Richie, Yes its flywheel power. The box I now have installed is the same ratio as my old 1500 box ,I can tell when I drive it. It feels the same. But its a KCR one. I'm hoping he put a few goodies in or did some tricks to it. its got a side plate on it and a S diff.
Dub shop Micro Squirt being fitted in Jan. So no more spark blow out + injection. Hopefully that will improve things.
So long as its quicker than the golf R boys I'll be happy.

Those Golf R's are rapid. Easy 12's with a remap. It's much easier with these new turbo cars Smiley
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Garrick Clark
Sr. Member
****
Posts: 499


« Reply #8 on: December 11, 2018, 07:47:10 am »

I was a passenger in one the other day. Tech wise it was good. It just didn't have a big power surge to it. So a mapped one is in the 12's.loads of air cooled v dubs will better that these days. Hopefully mine. Lol
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Air cooled Engine builder
PPRMicke
Sr. Member
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Posts: 343



WWW
« Reply #9 on: December 11, 2018, 14:18:08 pm »

Hi Richie, Yes its flywheel power. The box I now have installed is the same ratio as my old 1500 box ,I can tell when I drive it. It feels the same. But its a KCR one. I'm hoping he put a few goodies in or did some tricks to it. its got a side plate on it and a S diff.
Dub shop Micro Squirt being fitted in Jan. So no more spark blow out + injection. Hopefully that will improve things.
So long as its quicker than the golf R boys I'll be happy.

Those Golf R's are rapid. Easy 12's with a remap. It's much easier with these new turbo cars Smiley
GOLF Huh
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DaveN
Sr. Member
****
Posts: 417


« Reply #10 on: December 11, 2018, 14:19:30 pm »

The guy who used to do my machine work has a customer who owns one with a remap and hybrid turbo, it runs 10.8-9 driven there and back. He swaps tyres at the track and drives it daily. Most stock modern stuff isn?t that quick on the track, add another quarter mile and it will be a different story
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