T&T w/truck from Carolina Dragway Jan16th

[Foose04]

Took the truck out yesterday to get a feel for the changes the slicks and larger turbo made. Trucks making around the same power with about 3 less psi and less timing.

Next time out, less air in the hoosiers & more air from the snail. :cheers


Also, the track camera guy got me on my second run, weak launch but will be a great gift for my old mans 54th birthday next week.

http://www.youtube.com/watch?v=HpSOxeKoW5M&hd=1

http://i152.photobucket.com/albums/s192/blackhawkawd91/1e17d840.jpg

[1iron]

Good passes. Any times you want to share?

[Foose04]

Sure, it went 11.6 at 11psi, 11.3 at 14psi.

I was getting a feel for the slicks so I had them at higher pressure, around 18. Pretty sure thats why on my 14psi run on last one the tires let go after rolling out and cut a 1.71.

I believe the new setup is going to need around 16psi and a hookin 60' to land safely inside the 10's.

[98Camarod]

what were the 1/8th mile times?

[Carlrx7]

since your running bias plys in the back only, did she start to sway on the big end

[Foose04]

7.5 on the 11psi, 7.2 on 14

[Foose04]

Carl sway wasn't bad at all, but I wanted to know the same thing so I started with higher pressure. Outside of drifting my 60" on the last run, I didn't really notice anything till shutdown area, even then it wasn't bad at all. Now that I got a feel for it though, i'd like to drop some air next time out.

[chrisheltra]

Nice passes should shine when you add some more boost.

[Foose04]

Thanks Chris. Hey if you don't mind sharing, what seems to be a good pressure for your truck on slicks?

[chrisheltra]

Thanks Chris. Hey if you don't mind sharing, what seems to be a good pressure for your truck on slicks?

Id usually run between 16-18 psi on the Hoosiers. What kind of traction device do you have on your truck? I'm pretty sure we've talked about it but I don't remember.

[Foose04]

Cal-tracs, 90/10's front. The slicks are QTP's 29x11.5x15.

[chrisheltra]

How wide are your drag wheels?

[DolSVT00]

Cal-tracs, 90/10's front. The slicks are QTP's 29x11.5x15.

If you start unloading about 10ft out your gonna find that nothing will hook.

Those cal tracs are poop for a light rear end truck unless you have a 30" tire thats a WWWWWW Dubayou....... (like Kenny)

Me and chris both had cal tracs, they were dookie after the mid 1.6's.

You need something that moves the instant center further forward. All they did was unload on us when the stop rolled onto the leaf.

[Foose04]

8inch wide rim Chris, can't get picky at $70 each lol. I still have some hope, the truck has done far better with a lot less tire and the same or more HP than this time out.

[DolSVT00]

8inch wide rim Chris, can't get picky at $70 each lol. I still have some hope, the truck has done far better with a lot less tire and the same or more HP than this time out.

I just think you'll fight it less with some good bars that move the weight from the front to the back like it should.

I did the same thing though, I had slappers and cut a 1.59 on them once, but It felt like someone hit me in the back of my head on the launch and on the video it looked like I had hydraulics in the rear. Sooooo I got me some cal tracs, I tried them suckers for over a year i adjusted preload, I ran them back in, i adjusted them slowly, I changed shocks, I put adjustable shocks on, I put some overload leaf's on the springs to stiffen them up bla bla bla. Couldn't get better than 1.6's on them and it was hit or miss to do that even doing the track mod........... I ditched them and pee'd on them, got me some 58" bars and rarely get a low 1.6, I typically cut 1.5xx's on 28" hoosiers or 27" drag radial's, tried em both it don't matter there about the same.

[chrisheltra]

Yup Im cutting consistent 1.5 60's now that I have the longbars on my 16" hoosiers and Im looking to lower that soon now that Ive ordered a set of 15" MT's.

[Carlrx7]

Carl sway wasn't bad at all, but I wanted to know the same thing so I started with higher pressure. Outside of drifting my 60" on the last run, I didn't really notice anything till shutdown area, even then it wasn't bad at all. Now that I got a feel for it though, i'd like to drop some air next time out.

sweet, just purchased some 17 c5 wagon wheels with 28x10x17 hoosiers. i dont think the 8th will be a problem for me. but the 1/4 mile i will have some racemasters up front.

-Carl

[BAD BOB]

why not use a 2 step to build more boost off line?

[chrisheltra]

why not use a 2 step to build more boost off line?

Hes already fighting traction issues....

[BAD BOB]

but sometimes when power hits harder sooner it could help

[DolSVT00]

but sometimes when power hits harder sooner it could help

+1 especially with a DR

[slowgreen99]

I think on the 14 lb pass you rolled the beam early too. It looks like you moved a bit, then went, so the time may have been a little off...possibly a 10???!

[slowgreen99]

maybe not after looking again. You just rolled maybe an inch so it probably didnt matter anyway. I fail

[1iron]

I fail

True story:poke:

[slowgreen99]

True story:poke:

another hater.

[LXtasy]

seeing your truck makes me want to turbo my rcsb 5.3

[BAD BOB]

seeing your truck makes me want to turbo my rcsb 5.3

still be slow! its only a matter of time befor i get one on the 04 ext cab i just got. hell i might just take the motor out the car and put in it!!! GG

[bwelch]

still be slow! its only a matter of time befor i get one on the 04 ext cab i just got. hell i might just take the motor out the car and put in it!!! GG

baller

[LXtasy]

its my work truck robert. not looking for rcf times. hell, i havent even taken it to the track.

[Foose04]

I may consider the 2step. However Gerald will be opening up the 4l80e soon. After getting more info on wiring up my trans-brake, CK-performance set the valve body up to have computer control. Well i'm running the transmission full manual and no computer, so thats not going to happen and was their mistake per my order. Their making it right though and covering all cost for Gerald at Gearmesh to get the valve body setup correctly. I can stall 3800-3900 (7-8psi boost) with 50% throttle before it pulls thru the brakes. I figure it will go much higher on the trans-brake. I hope the american way of "more power will fix it boe" helps the hoosier hook. I'm also changing a few other things should help her bite like it first did.

LXtasy boost that 5.3 all day. The guy who built my kit is running a non-intercooler special for tax returns, I think it goes for $2300 complete kit.

[BAD BOB]

with a 2 step mine picked up like 4 psi. it is set right at the point where i will push through the brakes and is probably one of best additions to help the turbo work

[Foose04]

So it picked up 4 psi over what it did before the 2-step at the same RPM without pulling thru the brakes? Does the 2-step help cut power then even though the boost increases? What are using for a 2-step and are you LS powered?

[Luckie]

As long as it is set up correctly, the 2 step will allow you to push past your stall with you sitting still creating more boost. It sends fluid to 1st and reverse and allows you to basically floor it and keep still till released!

[chrisheltra]

I still think until you get some long bars and some wider meats out back your just spinning your wheels. Pun intended.

[BAD BOB]

yes stock ls1, and yes i set the 2 step at the same rpm that i foot braked at and it picked up that much. it made a world of diff and i didnt know it would. they say that it has to do with the extra fuel being dumped into the exhaust that makes the turbo spool better/faster. it really helps on pro trees so you can hold the brake, mat the gas and then bump into the lights so it will be at full boost when you ready.

[BAD BOB]

As long as it is set up correctly, the 2 step will allow you to push past your stall with you sitting still creating more boost. It sends fluid to 1st and reverse and allows you to basically floor it and keep still till released!

that would be only with a trans brake

[Luckie]

Sorry, I must have missed something. I thought that I saw him mention a transbrake in his 4l80.

[BAD BOB]

im sorry he did, i thought you were referring to the statement that me and him were talking about

[Foose04]

Thanks Bob, care to share what your using and some details on the install? Chris I'll just find one of Leslie fat friends to go with me to the track if I have to..put some grub in the bed of truck and head to staging lanes...nothing a little weight over the axle won't handle..

Luckie I was asking about a 2-step, but thanks for the input.

[BAD BOB]

im using the msd one http://www.msdignition.com/product.aspx?id=14285&terms=8733. works great and easy install with just one wire hook up. just plugs right between the coil harnesses and hook up an activation wire

[gearmesh, inc.]

I have heard that with a turbo, if you have the means if retarding the ignition timing while on the 2-step and/or transbrake, the extra heat in the exhaust from late ignition will help spool up the turbo even more.

I have even heard of specific turbo cams that have a late closing of the exhaust valve. The exhaust valve doesn't close until the piston is part way up on the exhaust stroke so that you get a high velocity push of exhaust gas to drive the turbine side of the turbo harder. This makes for a wider lobe separation and a more steetable cam, too. I have heard a lot of praise for the folks at Cam Motion concerning their turbo grinds.

[Carlrx7]

there is got to be a way to get that done inside the tune without having to use a standalone.

[Carlrx7]

Rob,

Do you have one of these tables?

http://i101.photobucket.com/albums/m62/carlrx7/CFCO.jpg

Clutch Fuel Cut Off Spark. mainly used to reduce the popping on decel, since you are now auto, i say toggle the clutch engauge switch and see if your timing changes, if so, you owe me lots of steak!

-Carl

[BAD BOB]

they normally would cut out fuel which would cause it to lean out, atleast thats how my efi live works. looked into doing something with mine like that but was told it was not the thing to do

[Carlrx7]

well, there is a fuel cut table as well, also several ways to trick the ecu to think its in a specific gear, and each of those tables have an rpm spark or fuel cut limit.

http://i101.photobucket.com/albums/m62/carlrx7/FCRPMvsGear.jpg

-Carl

[Foose04]

Hey Carl, yeah I actually played with it when the truck had the stick in it. However, it was a really rough 2step at best (slow to resume after cutting off) I have my doubts on how well it would work at the low RPMS i'd be using it at. Thanks for the heads up though.

[Carlrx7]

Ps. I hope that 4.8 came with stainless steel exhaust valves with all this late combustion.

[Foose04]

Inconel...didn't you know I got a factory freak. Jim Bob at the GM plant that day hooked me up for shits & giggles.