trik396

My egt's topped out at around 1200 and my mph topped at 94.

I was not a happy camper but had a good time anyway. After the eight mile my mph was 74 but she just wouldn't pull hard the rest of the way. I know I need more fuel and I'm wondering if anyone can make suggestions. I'd like to keep my Diablo programmer. I'm thinking VanAaken 3.2 duration only box as I have enough timing with Diablo.

I'm also seriously considering nitrous with the extra fueling as I've heard it is actually less harmful than water/meth injection as far as head gaskets are concerned. Help a guy out.. give me your opinions...

RamWheelsBy4

What were your times, 60', 1/8, 1/4??

What tires and launch method??

Your EGTs are wonderful for WOT 1/4 run, but that may mean you don't have enough fuel.

Does the Dioblo programmer fuel hard past the normal 2950rpms or so?

trik396

My best time was a miserable 14.169 seconds at 94.73mph. Launching the truck is the most important thing and the hardest to do, I've found. It's very hard to stage and watch the tree, rpms and or boost and I did a very poor job of it. I don't know what my boost was when I left on this pass but it had to be "some" boost because other launches my 60' times were terrible.
Best 60' is 2.111seconds

330 is 5.827

1/8 is 9.022 at 76.68mph

1000' is 11.803

1/4 is 14.169 at 94.73mph

and I weighed my truck with me in it.... 7740lbs... Myself and my truck need to go on a diet...

trik396

I don't know how hard it fuels past certain RPM's but I'm thinking I'm running out of fuel because every run that was in the 14second range was a mph of 94.xx.
I just didn't have much pull past the 1/8th mile as you can see I only gained 18mph from half track to full run...

XLR8R

You're definitely leaving something on the bottom end - that's an easy 13 second ride you've got there!

Are you launching on those Nittos?
Any wheelhop, how's the tirespin?
Did you mention whether 4WD or not?

Correct on the NO2 (easier on the HG than H2O/CH3OH) - but you need MORE FUEL with those 1200* WOT runs!

My Quad Race gets me to 1600* after the third gear change...

trik396

Yes I'm launching with the Nittos. No tire spin or axle wrap that I could feel. I'm launching in 4wd. Temps were in the upper 60's. Max engine temp I saw was 208* and max trans temp was 187* both of which make me feel kinda safe.
I know I need more fuel. I smoke out the starting line then leave and hit max boost of 45psi and no smoke from there on. SilverBullet64 doing its job...

RamWheelsBy4

It did take me a while to learn how to launch a 7000+lbs 4x4 truck with a turbo diesel engine. Certainly not like my muscle cars of the 60s & 70s.

First off until you have everything down don't worry about the tree. That will only affect your R/Ts and that does not change the actual 1/4 mile times.

I go around water, stop put in 4hi, roll slowly to the tree until the first light is on. Then start power brakeing, start rolling easy into the throttle to start boost to build. I usually watch only my boost on the TST remote. When I have close to the boost I want I bump off/on brake to roll to light second fully staged light. I try to keep steady throttle/boost while waiting on the tree. The dump the brake and bury the throttle on the third yellow.

Practice on the track was really the only way I finally got where I could get fairly decent and consistent luanches.

With your mods, similar to mine I would think you could launch at 15-18psi and do 1.9xs 60' times easy and probably 1.8xs.

And I agree you should be in the 13s easy.

trik396

Thanks guys for the advice. I know I need the practice as it's been a very long time (over ten years) since I've raced.
RamwheelsBy4, your truck moves!!! That's exactly what I want... Looks like you've got a bit more turbo than I do and the fueling to lite it.... I'll get there... Just hope my stock output shaft can make it...
XLR8R, sounds like you need a bigger turbo... I would have been happier with a quick trip to 1600* yesterday if it'd meant better times...

Mega Bass

I'm no expert, but it seems like you could benefit from a better program also. Even if you are limited by fuel you should be running 13's. I just timed myself in the 1/4 mi after installing my meth kit using both my Outlook monitor and a G-tech pro at the same time. I ran a 5.5 sec 0-60 and a mid 13 sec 1/4 mile. I have the fuel shut off when EGT's reach 1400, which they did during that run. The G-tech pro is pretty accurate, I have used it at the track in my GTO and verified its times. Its trap speeds always read about 4 mph too high though.

RamWheelsBy4

Thanks for the comments. Engine wounded for now so not any racing until $$$ falls from the sky.

My truck runs faster than what I started to accomplish, but in todays trucks/hp/ETs it is just one of the others.

I wish I had the money to do all the mods I would like and run 11s, but that is not likely to happen any time soon.

This video is a little more normal stage and run. I don't like to have to overfuel that much, but it is the only way I can get the boost up and run in the twelves. Would not need that kind of smoke if I had the head work, cam, springs, injectors, dual cp3s and twins I want .

http://media.putfile.com/Houston-Rac...ark---ET-12779

trik396

Ram, what did you do to the Cummins?

Mega, what did the meth add to your et's?

Mega Bass

I think the meth reduced my ET by about 0.5 sec. It definitely adds more power that you can feel. Prior to meth I ran a 14.2 with my crazy larry tune. However I had my bullydog remove fuel when my EGT's reached 1300 prior to installing the meth. Everytime I have tried running the 1/4 my EGTs have exceeded my limit and defueled the truck briefly. Then after I installed the meth I raised my EGT limit to 1400 to try and prevent defueling. But my temps still reached 1400 and defueled even with the meth on my 13.6 sec run. I thought the meth kit would keep my temps a little lower than it does. I guess a bigger turbo might be in my future mods.

XLR8R

That's for sure! 45 psi....

I've been whipping the stock Holset like a rented mule!

What percentage are you injecting?

You can allow the EGTs to go higher for brief periods - it's not how high the EGTs get, it's how many BTUs you're heat-sinking into the piston crowns.

973604x4

i dynoed 527 without water/meth, 579 with water/meth. 60~70% water

RamWheelsBy4

trik396,

I blew the rear freeze plug back in late September on the track. It blew about the 1/8 mile mark and I did not know it until at the end. By that time there was no water in the block, engine temp guage was buried. On the track I always turn any defuel/backdowns off. I am sure my EGTs hit 1600+ for a few seconds and maybe higher with the hot block and cylinders. 1600* has not been any problem for a few seconds on the track. Been running that way for 2 years, but not without water in the block.

Replaced the freeze plug and everything seemed ok, but after a few weeks noticed quite a bit of blowby coming from crankcase vent and then found it was using about a quart of oil every 2k miles or so. So the guess is that I deformed a piston and scarred a cylinder, maybe more. The truck runs ok except for the blowby and oil use. I have not pulled the head to see what the real damage is. Don't really have the money to fix it right no matter what right now. So I have just been driving it conservatively for the last 6 months. Probably have 14-15k since then so the damage does not seem to be getting worse. Every now and then I can't stand it and turn the boxes up and blow some carbon and soot out of the system, but afraid to even go to the track. I probably would get out there anyway.