Nitrous Assisted Launch

[DonWG]

A short clip I put together to show the effectiveness of using nitrous oxide injection to spool the turbo at the line. She leaves like a naturally aspirated engine.

I usually go WOT on the second amber, so the launch is a little weak on this run.

YouTube - Grand National @ Barona 123107

[SGRIM]

Wow that was great. What was the 60?

[DonWG]

That particular run had a 1.350 60 ft. The best for the car that weekend was 1.289.

[jwillettgn]

Nice, time to look for a bottle.

[DonWG]

It's the only way to launch a turbocharged car.

[DonWG]

The nitrous is on for just a fraction of a second. If you study the video carefully you'll hear the engine relax just as the car is coming off the wheelie. That is the point where the nitrous is shutting down at 16 psi. From that point on it's all T76 turbo. You'll notice also that as the turbo comes up on good boost the tires lift again.

[norbs]

I noticed you are pre-spooling the turbo as your putting on the staging lights. I bet that helps also, something i should do also........ That car spools really quick, have you tried it without nitrous, how many seconds to 10 psi without the nos.?

[DonWG]

The torque converter stalls at 2440 @ 0 boost. I stage and bring the rpm up to 2250 to 2350 rpm. The trigger restrictions for the nitrous system are, over 2440 rpm, over 94 kPa (0 boost) and WOT switch. I have an override switch that I activate so that I can do a burnout without worrying about the NOS activating during the burnout.

This is the car launching without nitrous.

YouTube - Grand National Early Test Run of Alky Buick V6 ver.2.0

[BEATAV8]

That is some cool shnit there Don. Nice!

[Mr.Spool]

donwg,if i didn't watch both videos i wouldn't believe the difference,the car hits much sooner and more violent nice 60!

[Boost231]

+1 on that

[GNVYUS 1]

Good lord that is cool, it happens so fast!!

Even the non nitrous assisted launch was good considering 231 cubes is spooling a T76 turbo that fast.

Who's transbrake are you running??

[DonWG]

Originally Posted by DR.BOOSTER

Good lord that is cool, it happens so fast!!

Even the non nitrous assisted launch was good considering 231 cubes is spooling a T76 turbo that fast.

Who's transbrake are you running??

The video of the launch without the use of nitrous is an old one. The year was 2004, I believe. I had the T70 on the car then.

I'm presently using a Hughes Performance transbrake on top of a T400 I put together. It's been great and I have no complaints.

That brings up another point. The T/C I use is rather tight and the 1-2 shifts were so violent that the normal HD sprag that's commonly used in racing 400s would roll over after the 1st or 2nd run. I got real tired of replacing intermediate sprag assemblies, so I went with the latest, new super-sprag setup. So far, it's been holding up great. Another reason to be careful about going to too tight a torque converter.

I plan on trying out Chris' latest transbrake valve body to see if there's any advantage over what I'm using now.

[TurboBuRick]

Thats awsome Don! I gotta have it . What nitrous kit are you using? Wet shot?

[blown okie]

DonWG i would like to see more pics of you engine & specs if ya got 'em.

[Quick6'n'-K.C.]

Gotta love it!

Don- what size jets are you using, i only ask because i dont think you provided us with that info.

That really is impressive, real small motor and a huge turbo, wheels up just enough and running 5s.

I am impressed, looks like you were on a sunday stroll how straight the car went down the track

BW

[DonWG]

Originally Posted by Rick87GN

Thats awsome Don! I gotta have it . What nitrous kit are you using? Wet shot?

It's a port injection system I made up myself. Wet nozzles.

[DonWG]

Originally Posted by blown okie

DonWG i would like to see more pics of you engine & specs if ya got 'em.

Check out this page on my website.

DRW Turbocharged Buick V6 Grand National

[DonWG]

Originally Posted by Quick6'n'-K.C.

Gotta love it!

Don- what size jets are you using, i only ask because i dont think you provided us with that info.

That really is impressive, real small motor and a huge turbo, wheels up just enough and running 5s.

I am impressed, looks like you were on a sunday stroll how straight the car went down the track

BW

It is a port injection system with each nozzle having a #24 nitrous jet size and a #24 fuel jet size. The nitrous system fuel used is methanol at 44 psi. The same regulated fuel rail pressure as the rest of the fuel system.

The estimated HP level of the whole nitrous system is 195 horsepower.

[Black Power]

That is interesting. Helluva run on that nitrous pass also

[turboculosis]

Impressive. Hats off to you Don.

[blown okie]

Originally Posted by DonWG

Check out this page on my website.

DRW Turbocharged Buick V6 Grand National

much thanks, thats awesome!!

[DonWG]

Thanks guys.

[TARZAN]

And that.....is why I love nitrous


-Will

[DonWG]

Here's a better quality version of the same video. When the screen is maximized, you can get a good look at the tires planting on the launch.

http://www.drwtransmission.com/Video...20don%20HQ.wmv

[TARZAN]

weight/power transfer is nice

-Will

[J-B Racing]

Once you get hooked on it..you can't get off it...

[DonWG]

Originally Posted by J-B Racing

Once you get hooked on it..you can't get off it...

Yeah, brother! Ain't that the truth.

[skeen]

got mine nitrous installed don, with a new razor kit.. will be re dynoing in the next two weeks.. looks like you"ve got it scienced out.. I figurewre going to turn it ON when the ecm sees WO tps, and the system i s armed, and then OFF at 10psi by then the 81mm should be rollin... considering the swap to an 88, we made 742 at 18lbs rwhp... [with the 81} how much more you think the 88 will make ??? I"ll bet the lag is a bitch....gonna be drivin my stuff to the local cruzes and shows...again, it was nice to have chated with you don, and hats off to you for going a "different" road... I even put the "token" purge on it... kind of "ricer"...steve

[DonWG]

Nah. It ain't ricer. It's Pro Mod.

You're going to find out that 10 psi is too early to have it turn off. Way to go. Hope everything goes good for you. Let us know.

[agteacher]

Originally Posted by DonWG

Nah. It ain't ricer. It's Pro Mod.

You're going to find out that 10 psi is too early to have it turn off. Way to go. Hope everything goes good for you. Let us know.

WE here at school .....are looking at another project. NITROUS.....to spool-up the turbo.
Zex has a turbo kit that we are going to use---ZEX™ Turbo Nitrous System---ZEX PART NUMBER 82218
http://www.zex.com/Base/Instructions/ZEX183.pdf
.
Question: if not 10psi( to turn-off) then What psi???? we have our ALKY kit set to "start" at 10psi---will this be problem???? with the nitrous and alky at the same time with 20deg(19-21) of timming at WOT????
We would like to "caution on the safe side" , so we are going to start with the 25 pill.... first!!!! But, we are un-sure of the turn-on(start) and the turn-off set points--rpm and the Boost set point for shut-off.

Thanks
"shop Crew"

[Brer Rabbit]

And put it on the bumper! U just created a monster with that. I know Im going to be trying it out this year.

[skeen]

don ,are you leaveing on the footbrake ?? it looks like your spooling against the brakes, then the front enddrops, [like you went to the trans break} .. can you walk through your procedure.. that thing leaves like a land missle !!!!!

[DonWG]

Originally Posted by agteacher

WE here at school .....are looking at another project. NITROUS.....to spool-up the turbo.
Zex has a turbo kit that we are going to use---ZEX™ Turbo Nitrous System---ZEX PART NUMBER 82218
http://www.zex.com/Base/Instructions/ZEX183.pdf
.
Question: if not 10psi( to turn-off) then What psi???? we have our ALKY kit set to "start" at 10psi---will this be problem???? with the nitrous and alky at the same time with 20deg(19-21) of timming at WOT????
We would like to "caution on the safe side" , so we are going to start with the 25 pill.... first!!!! But, we are un-sure of the turn-on(start) and the turn-off set points--rpm and the Boost set point for shut-off.

Thanks
"shop Crew"

The answer is not that simple without knowing what all your tuning parameters are. A few pointers would be to have the nitrous turn off at least 4 psi under your max boost level. That way, if the boost is unsteady, you won't be activating and unactivating the system throughout the run. I shut down my system at 16 psi, which is just a tad bit low. I think my transition from nitrous assist to boost would be smoother if it shut down at about 19 psi. If you're trying to spool a relatively large turbo, the nitrous shut down can be higher. If you're running a relatively small turbo for your application, you might want to be more careful so that you don't overboost. Small steps.

Activation should be at WOT, over 2000 rpm. I use a WOT switch to make sure the nitrous only activates at WOT. The ECM also makes sure that the circuit is only live at 94 kPa manifold pressure or higher and 2400 rpm or higher. Don't bother picking out a stall torque converter until after you see how the car works with the nitrous. The nitrous will change the best choice for your torque converter. You may find out that you don't need to bother with a different torque converter.

[DonWG]

Originally Posted by skeen

don ,are you leaveing on the footbrake ?? it looks like your spooling against the brakes, then the front enddrops, [like you went to the trans break} .. can you walk through your procedure.. that thing leaves like a land missle !!!!!

You have it right. I run a very tight torque converter. It will only stall 2440 rpm at 0 boost. I bring up the engine on the T/C as I stage. When the last staging light comes on I set the transbrake (front end drops) and come off the foot brake. The nitrous system is configured to turn on at 2440 rpm and 94 kPa, so the closer I am to that threshold rpm before going WOT and releasing the transbrake, the better the 60 foot time is. If I want a wild launch off the light, I'll go WOT on the 2nd amber and release the transbrake on the 3rd amber. This gives the nitrous some time to get the turbo spooled before it's time to leave the line. Most of my runs have been with going WOT at or real close to the 3rd amber. I tried going WOT on the first amber only once so far. It was amazing, and I might add, I'm in no hurry to try that again. As it is, it takes about .5 to .7 seconds for the engine to get to 16 psi. I waste more nitrous during the purging process than I do on the run.