Why so much boost on the first run? Wastegate issue?

 

Yes I



'll reply more when I get home

 

this was set on kill mode!

 

i may have underestimated what the elevation change would have on the car just a lil bit lol

home is 6,500 ft above sealevel , tracj is only 1,800 ft above sea level

car will be back up and running on monday or tuesday , got back so late last night we didnt even unload the trailer

 

6500 ft?? holy cow.

I'm on the coast. Track is at 90ft. Streets are sometimes at sea level, especially after a storm


btw, I'm running an aluminum driveshaft. Always good to have a cheap 'fuse' in the driveline

-- Joe

 

friend of mine broke his aluminum shaft when he hit 2nd gear at the track. slapped around on the bottom of the car, smashed a hole in the floorboard, set off the air bags, tore up the dash and steering wheel, and busted the windshield. lol

 

yeah, i'd say having the driveshaft as the "fuse" is about the worst thing you could do. it can take out transmissions and rearends too.

 

Damn I ran two different f bodies 94 and 92 into the 9s on stock aluminum drive shafts never any issues. The 94 was 1.37 short times. I took time to set pinion at 2 degrees down on mine and worked great.

 

With a driveshaft loop and a slip yoke, not usually.

When I was into trucks we used to break driveshafts regularly.

The driveshaft breaks, the slip yoke shoots out the back of the transmission, and the loop contains the shaft.

Sometimes it would break at the rear end, and the loop would just contain the shaft from banging against the tunnel.

-- Joe

 

How does something that spins behind you end up in front of you?

-- Joe

 

I suspect he got wheel hop in the water box.

-- Joe

 

It didnt.........? It basically set off the airbags and they did the dash/windshield damage. Shaft just punched a hole in the bottom of the car.

 

Why is this even a discussion. At these horsepower levels, a driveshaft loop should be employed, especially running a different transmission than what the car originally came with as well as a home fabricated transmission mount for the replacement. If this really did happen, I am not surprised. If I had to guess, it happened off idle by the tree, which is shocking because looking at those rear tires I doubt they even hooked that hard...

 

I only seen shafts break at the launch hit. Never any other time. Depends where they break a loop contains it for most part but if they twist up and snap nearer to the axle like projects, then a front loop isnt going to help much, the rear piece is gonna be thrown about wildly still lol

I would run beefy driveshafts. Imo you want the rear gear to break before anything else. I dont want a driveshaft problem to take out my transmission output shaft

 

joe is correct it wheel hopped broke at the front u joint first from what i can tell.
im not sure why it wheel hopped pinion angle is correct lca's are darn near perfect , the drag shocks wer eon the car when i bought it but they seem ok

my only guess is that the rear of the car being rasied caused it , i need to make sure my tq arm mount isnt flexing as well i made my own xmember mount for the tq arm when i did the trans swap , witht he old setup the thing never hopped , i got 5 inches of snow on the ground again and its still comming down so i cant even take the thing out on the street and see what it does

 

Oh.. So the airbags did the dash/steering wheel damage.

-- Joe

 

I dunno. Rear end failure could lock up the rear end and put you into the wall at 100+mph.

Then again, I agree, I've never seen a driveshaft break (on a drag car) that wasn't within 20 feet of the starting line.

-- Joe

 

95% of the time it will break int he burnout box . starting line

ive seen them break mid track and on the top end though , useally the damage starts off the line though by a crack in the u joint and the force applied down track finishes it off


most mid to down track ones have really bad damage to the car

 

I also have never seen a rear end failure beyond 20 ft of the line. Thats where the most stress is. I dont see how a rear would fail at speed unless it ran out of fluid and destroyed a bearing

 

Post up the cell video, it's easier to determine what happened...

 

i've seen them explode down track. one instance i can think of came through the floorboard and tangled up the driver's arm. she got hurt BAD. you guys are assuming a lot of things would remain controlled in the event of a failure. i've seen slip yokes explode and take off the entire rear of the transmission.

at this level, you should be running billet yokes, solid 1350 joints, and at least a 3" chromoly shaft. you want the ring/pinion to be your fuse. at least that is somewhat contained if it goes.

with 4 digit power, mechanical mayhem knows no bounds. get this idea of "that's impossible" out of your heads and realize that every piece needs to be given attention.

 

I think he is saying wheel hop in the box caused it, and if that is the case there is no way he was seeing four digit numbers to the tires spinning, especially with those tires he is running, in the water box, despite the gauge hitting 18 pounds. I think he pretty much underlined what happened; he made his own trans member, his own torque arm bracket, we have no idea if the driveshaft was altered to accommodate the 700R4 to T350 swap difference, something apparently just went wrong with his setup during wheel hop. I do agree though, any build should really beef up those areas you mentioned, otherwise it defeats the purpose in building a ten second or faster project. I mean, there is of course a reason why the NHRA wants to see a driveshaft loop with any vehicle running slicks, or running 11.49 or faster...

 

I don't think he really cares.

This whole ET and time slip pissing contest was cute 20 years ago.

I'm really glad your car is kinda fast, and you contribute to the forum. But that doesn't give you or anyone else a license to be a jerk.

-- Joe

 

Yet street can post this?

 

No he can't.

I'm editing the thread. The warning is for all. But the theme remains the same. People jump in one of Project's threads and start picking on street, and it becomes a big internet war.

-- Joe

 

Justin, seriously, I'm getting tired of the nonsense. I asked for Dave to POST his video because even I am curious to see what happened. The warning came to me too from Joe, and I respect his decision. I told him I wouldn't let it get to that level on my end anymore months ago, and it did. Matt wants to race me, and we will, at least he has the nerve to throw a challenge out not like Charlie Eden who hides behind those goofy glasses of his when he attempts to talk tough, which is hilarious. Dave has already clarified what went wrong, wheel hop, a home made member and mount, and who knows if the driveshaft needed to be modded. Other than that, what was being said on my end that went against a members build thread? You disagree with what I say, no problem, in the end let Dave clarify what happened.. I have been supporting Dave since he started this thread, in fact, I only even bother with Dave's and Joe's builds, I don;t even click on the others, so why would I get away with anything? I was not the one who brought the trash talking into any of this...

 

Joes respond saying "i dont think he cares" sounded like hes defending you and as if you are getting special treatment.

Just making sure everyone is on the same page here lol

 

8* last night

 

Are you calling it quits for the Winter Dave?

 

yeah , i took s nasty fall off the trailer yesterday getting some things out of the car , going to try to finally unload the car off the trailer after lunch , not going to do a whole lot to it right now till it gets closer to race season again. instead im going to focus on my turbo bike build for the time being

 

You've been hurting yourself all year, time for a break from these projects. Been quietly getting the turbo I6 Trailblazer done myself, I have no choice but to go Megasquirt with it. Oh, and I'm stealing that paint code of yours for the Trailblazer, so hand it over lol...

 

we are all waiting for the video! We have been watching for years, lets finally see that bad boy on the track

 

midnight pearl blue , thecoatingstore.com

yeah i may end up hurt once i get this project finished


230 pounds 60ish hp on the low end who knows on the upper end of the boost scale

motor makes just shy of 30hp n/a stock @ 250cc were punching it out to about 305cc ported head and a cam , turbo is set to 15psi and can be turned up into the 20's

 

Nice, I went in looking for a color for the Trailblazer, and I found one for the GTA...

What's the story with the dirt bike, is that a passtime in Utah...?

 

just an other exspensive hobby lol

 

Can't have alcohol, gotta do something.

-- Joe

 

lol u mean beer that is 90% water , and hard liquor thats really damn expensive

 

Haha Joe, no alcohol means no topless bars, Dave must be dying out there lmao. I'm right between NYC and Atlantic City, I don't think I'll ever leave this area. I would be lost in Utah, some of the videos Dave throws up I find myself waiting for a UFO to jump out, reminds me of Area 51 lol. I would lose my mind out there, especially with no damn alcohol. I do like the dirt bike idea though, it's cool. I've had a Honda Hurricane sitting in my cousins garage back in Queens N.Y. for years, maybe one day I'll do something with it.

 

Figured most of Utah was dry being Mormon.

Hey, do you have the burnout box vid? I'd love to see what happened.

-- Joe

 

6 days and no real update since the track outing....

 

not dry u cn buy beer at most gas stations but max is 3% content , u can get a lil stronger stuff from the liquor store but it has these funny warning label stickers on it and its still not as strong as a beer u could get in any other state

cant buy everclear, 151 and some other things like that here , not that i drink that stuff anymore but atleast i can get my yager here thought its about 3x as exspensive as anywere else

aparently the video is to big to send from my buddies phone to me, so just gota wait till hes back in town which wont be till next weekend , he lives and works out of state and comes back home on the weekends to do stuff at the farm and see his family


lmao , i just finally unloaded the car off the trailer back into the shop right before we left for lunch , no way in hell was i unloading that thing in a foot + of snow. ill get around to the car later today or saturday and have some form of update on it .

i dont plan on doing a whole lot with it till i finish the turbo bike project to be honest. that was the last event of the year till either january or february , and since its nothing but bad weather right now im not in a rush to fix it so i can street drive it, theres no point. i will however have it back up and running before the next event , we just dont know if it will be jan or feb yet

 

i don't really understand i guess. you either want it, or you don't.

 

just more then one project to work on though my bike project is moving alot faster then i thought it would i figure 2 weeks till i get that finished and then its back onto the car

 

No video either?

 

Atleast you have a few months to get the heads off and fixed

 

heads dont have to come off , originally thought it had a valve hang open when the motor wouldnt run . dang thing wouldnt make any vacum , turns out it was something else

 

What was it?

 

i dont know how it happened but afterwards in the pits we tried to refire the engine and it would barley run , ms was reading 90 on the map , boost gauge was reading like 2-3 inches of vacum.

whe checked the line first to see if it was kinked or otherwise blocked and when i refired the motor got no vacum over the map line , so then pulled the brake booster hose and it felt like air was comming out of it.

so then we proceeded to yank the covers check all the valves , nothing wrong there , so then we yanked the intake nothing wrong reassembled it

at this point i figure the motor is really hurt somehow before we loaded it back on the trailer i grabbed the distributor and tried to move it put it was locked down good check the timming and it was way off 30 something degrees late.

fixed that and the motor fired right back up and sounded good havent touched it since , may have accidently revresed the ignition triggering in the ecm when i had hooked up the laptop to see what was up but i doubt it but it is possible since i had 2 different ecms in the car with 2 different ignition setups and when i plugged the laptop back in it may have loaded the settings from the other ecm into the one i was currently using

its something i need to look into this week on why timing went from 10* btdc to 2x atdc

 

You could't pay me enough money in the world to work in those conditions... You are a true warrior.


Track don't open until April here, so I've got all winter (in my climate controlled shop) to finish my car.

-- Joe

 

lol yeah when i was younger id be out there in the rain snow whatever working on my stuff , im a bit more relaxed and patient now