Took the Prius Drag Racing!

[F8L]

<div class='quotetop'>QUOTE(Ray Moore @ Aug 28 2006, 05:57 AM) [snapback]310486[/snapback]</div>

When we ran ours we turned 17.8 seconds at 87 mph. We force charged to 8 bars as we were getting ready to make our run. This was at night at the Houston Raceway. Each time got slower. We think the inverter and battery were getting hotter and that was increasing the internal resistance and reducing the amount of electrical power we could utilize. We thought about letting it rest so the electrical components could cool but the engine would have cooled too. I guess a can-view would help figure all this out.
[/b]

The ET sounds about right but the MPH is about 10mph too fast 87mph in the 1/4 would mean a 15sec ET.

I'll go out on a nice cool night and try testing the heating idea by simply letting it get nice and cool after a few hot laps. I know wheelspin wasnt an issue so traction control wasnt engaging.

[240sxer]

It must have been 78. I did a 18.1@78mph out here (2800ft) with a DA of 8000 or something like that.

Charging the battery seemed to do nothing, I think having it around 1/2 will do the best. From what I noticed the more charged the battery was the longer the delay for when it engages the ICE off the line. There is a delay when you launch and for a second or so you are ONLY on the electric which makes the car 60ft horrid (2.6-2.8). I never got a chance to test it at the track but I think if you have the battery worn down a bit maybe to 1/3 or 1/2 you can charge it at the line so the ICE Is on then just lift the brake when the light turns green, so the ICE will already be on and there will be no delay waiting for the ICE to turn on. That might help it get a 2.4 60ft or so which will bring the ETs down by .4-.6

For an example, my 91 240sx ran a 17.0@79mph. Only 2mph faster but 1.1 second faster in the 1/4.

It's all about the 60ft.

My 95 240sx 2jz turbo ran a 13.2@107 (2.2 60ft) with stock turbos that spooled quickly the car had 330whp at that point

hp from et = 309
hp from mph = 344

I upgraded the turbo a gave it some more boost for 440+whp and I ran a 13.3@118mph with a 2.8 60ft. the car gained 11mph of trap but lost .1 in et because of the much slower 60ft.

hp from ET = 302hp
hp from mph = 461hp

Getting the 60ft down to a 1.7 got me a 11.3@123mph 1/4 mile with the EXACT same setup minus a different trans/stall. Same power.

Prius

Calculating a 3200lbs (prius+driver+gas) car with a 17.6 = 116whp/139hp

based on trap 3200lbs car with a 79mph trap = 123whp/147.7hp

So if you could 60ft the car better, you *should* be able to run a 17.2 or so.

Sorry for the long post, i'm a drag racer guy.

http://www.s-series.org/htm/calc/hpcalc.htm

[F8L]

LOL, no applogies needed. I race my 4x4 fullsize truck, my T/A, my C5 and my old 9sec 87' Mustang

Here is a video segment that illustrates exactly what you mentioned above:


2.1 60'
Trubo Z71 vs Turbo Buick GN (I didnt pre-spool and got a terrible 60'


1.8 60' cant remember exactly but 1.8 something
Turbo Z71 vs N/A Mustang LX

The trick is figuring out how to get these cars off the line quicker. Its all in the 60' and it doesnt look good

Ohh, that 240 sound awesome

[240sxer]

Yeah, the 240 is pretty quick. It should be in the 9s soon. I'm going wish a standalone and bigger injectors. Right now my fuel is maxxed out @ around 500whp on pump gas. The Buick GN is pretty similar to the supra... big laggy turbos... (my 240sx has a supra engine)

I also have a C5. A 02 Z06. Best I can do in that is in the 12.3 range, it's bone stock though.

Ahh, an STS turbo, I was thinking about one of those either for my 06 Chevy Singlecab with the 4.8liter V8 or putting one on the vette. I think the vette can do around 550whp with the system@5psi or so which is good since I put down 350whp stock that's a ncie increase. What turbo does the truck have? I have a A BorgWarner T70 with a .86 A/R on the 240. It's supposed to be good for around 800hp but it's a laggy mofo.

60ft is everything... My 240 still does not 60ft well for having 28in ET Street tires on it, but it's not too bad. I've got a 4000rpm stall and a Transbrake (TH400). I really need nitrous to get it off the line better but I don't want nitrous on the car. It's more impressive all-boost pump gas to me. (91 octane Cali pump gas at that).

[F8L]

I knew you were cool form the first post. hahaha

[240sxer]

I try to avoid modding the Vette since I got it to be my *legal* car. I can go to the street races and such and not worry about being bugged or getting caught since the car is 100% stock, yet I can still run with some of the quick cars. The 240 is the beast that runs around on slicks and skinnies and hardly ever leaves the garage. It's a Nissan 240sx with a Toyota 2JZ-GTE engine and a Chevy TH400 trans. lol..

Here it is... It's quick for not really being crazy modified.

Toyota 2JZ-GTE
Cheap Ebay Turbo Manifold
Borg Warner T-70 Turbo
550cc Stock USDM Injectors
3in Downpipe
3in Exhaust
QTP Exhaust Electronic Cutout
Hybrid Front Mount intercooler
Chevy TH400 Transmission w/Brake
Pro Torque 4000rpm Conveter

Only dyno i've done with this turbo was 440whp/460tq@15psi, I usually race it at 18-20psi

[attachmentid=4658][attachmentid=4659][attachmentid=4660]

[tnthub]

<div class='quotetop'>QUOTE(Lola'05 @ Aug 27 2006, 08:47 PM) [snapback]310334[/snapback]</div>

This drag racing has got to be a male thing.
[/b]

Actually, a very good movie called Heart Like a Wheel was just re-issued on DVD. It is the story of Shirley Muldowney. You should watch it.

Drag racing is one of very few athletic contests where men and women not only compete equally but also there are no hard and fast rules that require a specific type of physique in order to excel. Angelle Sampey is a multi time Pro Stock Bike champion, Melanies Troxel is currently in the top five in points in top fuel, and Shirley Muldowney was a multi time top fuel champion.

Upper body strength is not a major factor in drag racing. Teamwork, driver ability, focus and knowledge typically separate the best from the proficient. The driver has a lot to do with winning, especially at a local level where the vehicles are often handicapped.

[tumbleweed]

<div class='quotetop'>QUOTE(Lola'05 @ Aug 27 2006, 05:47 PM) [snapback]310334[/snapback]</div>

This drag racing has got to be a male thing.
[/b]

Tell that to Shirley Muldowney or John Force's three daughters.

[Randy G.]

<div class='quotetop'>QUOTE(Lola'05 @ Aug 27 2006, 07:47 PM) [snapback]310334[/snapback]</div>

This drag racing has got to be a male thing.
[/b]

For the seriously uninformed:

Women's Sports Foundation "Sportswoman of the Year" Melanie Troxel

[Tideland Prius]

I wonder if you actually kept the engine in the Prius running to minimise the lag, would that help? Say, stay in B so that the engine doesn't shut off.