Engine Question

airkewld · 2007-07-20T05:56:21+00:00

Hello i am new to the drag racing scene and have a few questions if anyone could help. I would like to build a street car to run mid 11s N/A. Was wondering what hp output would i need to produce these times. Also what would the weight be roughly of a 1969/70 model bug after it has been modified engine wise. Any help would be much appreciated. Also have been checking out aussie dubs such as dave butlers and rod richardsons and was just curious as to whether what horsepower these are producing at the wheels. cheers

airkewld Slammed & Awesome Dubber

81 posts · joined Jul 2007 · 2 Aug 2007, 7:40 pm

#604981

the 60ft clocked was 1.775 which is not too bad for one of the first times out but lookin for improvement on that

airkewld Slammed & Awesome Dubber

81 posts · joined Jul 2007 · 27 Aug 2007, 10:21 pm

#608827

Hey i was just wondering if anyone could tel me is there anyway of estimating the mph you should be achieving with ur car say from dyno figures.

lugnuts Custom Title Time!

1,070 posts · joined Aug 2002 · 28 Aug 2007, 6:34 am

#608856

airkewld wrote:Hey i was just wondering if anyone could tel me is there anyway of estimating the mph you should be achieving with ur car say from dyno figures.

Yeah there is get all your numbers and give em to Dave.:thumb

Dont listen to what they say,just watch what they do.Oh yeah ive NEVER finished anything ive started.:o

dangerous 23 Windows of Awesome

5,901 posts · joined Jan 2005 · 28 Aug 2007, 6:40 am

#608857

I have use this in the past, but on the last dyno it was incorrect.

add 11% to your rear wheel number...=222FW

You will need a calulator with a cubed root or a big brain.

HP@FW divided by (weight in Lbs), then cubed root the answer.
Multiply that by 234.

If your car weighed say 1900lbs and made 200@wheels

A bit over 114mph?

Try this one too and use that 11%

http://wallaceracing.com/et-hp-mph.php

=112.45

westi wrote:That's mad Alan.

dangerous 23 Windows of Awesome

5,901 posts · joined Jan 2005 · 28 Aug 2007, 6:45 am

#608859

You have already run nearly 88mph at half track no?

Try this one till you get the number you want:

http://wallaceracing.com/eigth-mph-from-quarter.php

I get around that 112 mark.

westi wrote:That's mad Alan.

airkewld Slammed & Awesome Dubber

81 posts · joined Jul 2007 · 28 Aug 2007, 9:07 pm

#609036

Awsome thanks for that. Yea the half track figure from the 12.5 run was 87.60. I dont think et radials were getting full traction so hopefully that will improve a little.

vassy66T1 Wow ... are U reading this?

2,120 posts · joined Jun 2003 · 30 Aug 2007, 7:22 pm

#609383

Dave you are like a VW rocket scientest ... un believable 🙅

I have got to pick your brain some time when I have cash in my pocket to burn.. (for parts):duh