BC847

20 ~ 25psig.

Unless you're into pulling the trans and fixing the carnage, you'll need to upgrade all the shafts to billet/alloy.

In the mean time, you might consider limiting the launch boost to 10 / 15psig.

@ 1STGENFARMBOY: I can't remember just now. I'm at the beach and have been drinking a little (OK, a LOT!!). I want to say around 35ish psig (BF Goodrich All Terrain Radials, 33" OD on 16" rims).

Onemoparnut

Here is the time slip.

Onemoparnut

Bc What is your 60' time and your et?

BC847

My best at a 1/4th mile track (@15' elevation (good air)) was 12.81 with a 60' of 1.69 seconds. That was last year.

With some tuning, I've been able to pull off an 1/8th mile ET (@253' elevation) of 8.03 with a 60' of 1.69 seconds.


At the end of the day though, the high-boost launches can break mess. It is fun though.

Onemoparnut

I am not going to make boosted launches everyday but on the occasion that I take it to the track I will try it when I get traction. If it breaks I will fix it lol.

ChrisLib

You need to take those 4 skinny rear tires off and try it with two REALLY wide ones,lol.

Onemoparnut

I know I got a set of slicks but I can't find a cheap set of wheels to mount them on. I need 16x10 wheels and I can't find a used set anywhere. I can't see spending the money on new wheels to use them once or twice a year.

Onemoparnut

Bc what do you think your truck would run if you launched with little or no boost?

BC847

Absolutely MUCH slower as the turbo(s) wouldn't be spooled. I'd kill a lot of skeeters while my opponent handed me my behind.

IIRC, The last time I was down at Coastal Plains Dragway (in Jacksonville, NC), I was having a bad issue with all four tires keeping traction, resulting in the truck jumping about violently in the first 50 feet. It was such that if I had stayed in it, I'm sure an axle or something would have broke.
I tried launching at a lower boost number starting with 10psig. The results were terrible as far as ET's go. 60' time was over 2.1x or so.

The bottom line is: With my turbo set-up, I've got to get above about 15psig for the primary to begin singing. As such, my 60's dropped dramatically. It appears that with my mess, 20psig (or more) launch boost is the shizzle with the 60's typically being around a low 1.7x.

I'd recommend one take a day (or more) at your local track to practice/experiment and start with, say 10psig and race the clock (forget your opponent). Try your best to be consistent with your launch procedure and boost number so that after three or four rounds, you can average the results. Then increase the boost a few pounds and see how it compares. Eventually, you'll run into traction issues (if something doesn't break first).



BE AWARE though that certainly, the more boost you launch with, will result in lower 60's, but you're increasing the shock and load on the trans and drive-line. This brings the old saying "Ya gotta pay to play" front and center.

It is said also that most races are won in the first 100'.

> How fast do you want to go?

Onemoparnut

I would like to go 13.50. As it stands I think I put down the best time that she is capable of at this point. Anything above 6psi and it spins and runs slower. When I get the slicks on I think that will help but I ain't sure how much. I want real injectors and a real turbo but all I need is some more money lol. I have been debating getting th 60mm wheel upgrade for the turbo but I don't know if that will be enough to reach my goal.

SmokemS

bill was lucky i didnt have my old black w250....i would gave him a run for his money

Onemoparnut

Oh here we go what rock did you come out from under hahahaha. I was starting to worry about you lol.

lopez dodge

that cool that there was so many 1st gens with you. i'm always the only one down here. i wish i could launch with boost

SmokemS

sorry bill been busy and all.....hopefully i can make it down to the buck in the next few weeks....you and the wifey gonna be there....great time you had at the track

Onemoparnut

Yea we will probably be there. Brandon started a thread a few days ago titled does Ford own cummins I told him you were going to go nuts again but he won't listen lol.