Can a crew cab 5.3 be fast? Apparently not
 

Has anyone seen a crew cab 5.3 that is remarkably fast? I've spent near $6k on mine and only ran 15.7 last night. 8psi sts, 2800 stall, fuel pump, injectors. Left the line @ 4-5 psi boost. Is the truck just too heavy?

Needless to say, it WILL go fast eventually. Just pissed off right now.

check sierracrew out. hes is running 14.2 na. and thats with wheel spin. something must be wrong with yours if you have a sc and you're running that slow. i would check into your tune.

I have an ext cab z71 it should weigh close to yours, Ive run consistent 9.00 in the 1/8 Im expecting better times with a cutout, new tune and weight reduction that should plant me in the 13's NA. Something is wrong with your setup, are you running 93 do you have alot of kr i agree with kbobo something is really not right and its probably in your tune. You should be in the high 13's at least

Something is serously wrong with your set up. I agree, you should in the high 13's to low 14's.

Somethings absolutely wrong there! Gots to be with the tune! Recheck that.

Yeah sierracrew has a cam and a cuople of other performance mods and is running low 14's.

I would say there is something wrong with your set up..... you should be in the 13's or low 14's...

Blownchevy just ran 13.7 in his s/c 5.3 crewcab. You tuning is probably the problem.

Must be the tuning !

:metoo:

beat me too it. :usa:

Did it hook off the line or just spin? What was your 60' time? What was your mph?

hey blowchevy you ran that 13's after the cam install???

Never ran the truck with just the blower.

To compare:

RCSB 5.3L Radix 13.5 @ 101.4
CCSB 5.3L Radix/Cam 13.7 101.1

I would say without the cam I would be looking at a 14.5 truck @ around 97 or so.

I KNOW OF A CC N/A RUNNING 14.0s @ 96. MPH.
SO THEY DO HAVE POTENTIAL.

CAPS LOCK SUCKS! :jest:

What are his mods?

my opinion
 

It takes my foot to the floor to even break loose in the staging lanes. Absolutely no loss of traction. 60' 2.47 330' 6.65 1/8th 10.2 1/4 15.7 @86.26 mph.

It is now obvious I need a retune. My opinion is, Allen, doing the right thing, was way too conservative on my mail order tune. I don't blame him. Without the dyno results you could hurt the motor.


8psi sts, non intercooled, 2800 tci stall, injectors, fuel pump.

You know what dude, I'd save the tune for now...although I agree!! But when you tune and get the new power, say goodbye to your tranny :nod:

You're crew cab doesn't weigh any more than my Ext.Cab Z71 or at least not by too much. :)

You got something wrong with the setup. You should go back and check everything, check it again, then retune it :)

I'm sure you've seen my videos and ETs so we all know that a heavy truck can indeed go fast with the STS kit if tuned right. Even on 8psi. :)

*F8L Z71*

Do you have a meth kit on the truck. If not without meth or an I/C your IAT probably hurting you at 8 psi in the summer heat.

just out of curiosity, how's your fuel pressure? i ran mine for far too long not knowing that my fuel pressure was dropping at wot. added an inline and it made a BIG difference. I get stupid KR even on 10deg timing with my whipple and that makes it run slow as whale shit. Are you getting any KR?

Do you have a meth kit on the truck. If not without meth or an I/C your IAT is probably hurting you at 8 psi in the summer heat.

I'm not sure how far you are from Allen, but being able to sit in the truck goes a helluva way towards a better tune -- even if he doesn't get her on the dyno.

Turbos can be tricky to tune -- lots of factors in the equation. Make sure you can check your KR, your fuel pressure, your boost (assuming you have a boost gauge and are not going on what the spring should be giving you).

I ran 7.5psi without meth on higher compression, but I tuned for it.

Are you able to log? That will also help Allen out if you can't get to him.

will try to get tune next week

Could this have anything to do with the traction control (if so equipped) not allowing the truck to go into power enrichment? If you have TC, turn it off before you run. Seems to make a difference on my Tahoe, on the street anyway, I haven't made it to the track yet

time to invest in hp tuners sounds like your serious enough to learn how to tune
its the best modding investment ive made to date it taught me alot

2.47 60' :barf:

With a turbo @ 4-5psi on the line and a 2800 stall that should be MUCH better. :judge:

Something definately ain't right. :eek:

i would have to agree that something isn't right for sure. on the other hand it is an STS kit. they put down great numbers on the dyno...

they put down great numbers on the track also.....get with allen and see what he thinks bout your problem...i think you need a meth kit to get you temps down so it doesnt pull so much timing from the motor...dont know unless your logging the info thou...

I ALL WAYS TYPE IN CAPS F*CK HAVEING YO KEEP HITTING THE BOTTONS.

HE HAS 4.10,TB CONVERTER,PACESETTERS,E-FANS,PULLEY,CAI,PORTER TB,AND A CUSTOM TUNE BY THUNDER.NOW HE ALSO HAS A SET OF HEADS SHAVED 30TH AND 3 ANGLE VALVE JOB :) :eek2:

really. i see you had one. what did yours run?

Zippy, that's kinda like saying the Radix can go fast, or an ATI can't go fast. Just because a few people buy a kit but don't optimize it for darg racing doesn't mean the kits can't be made to go go fast. You of all people know that it's all about the combo and not 1 specific part.

I think the STS has proven itself over and over again with the GTOs, Angie@Thunder Racing's car, my truck, Allen's truck etc etc.

it ran a 14.4 at 98 on 5 psi...i never ran it on 8 psi at the track....he's got a 5.3 and i had the 6.0

I'm not saying that mine is fast but damn. Something is majorly wrong with your tune or setup. My best run to date was 14.268 @ 95.56 (1/4) in like 55 degree temps with plenty of wheelspin only being able to launch from about 900 RPM stallup. 60' was like 2.157 or thereabouts. I ran a 14.301 @ 95.29-60' of 2.201+/- in 88 degree temps just the friday before last. All mods in my sig except the latter I had cutouts. Plus now I have done weight reduction- about 150-175 pounds and running ET Streets 27". I am hoping to be in the high 13's come winter. This all on a N/A motor no spray or power adder and Yup, its a Crew Cab. Last weight was 4965 #'s with just a hair over a half tank of gas.

Something definately wrong. See mods and ET in sig below. When i ran this ET my truck even bumped the rev limiter on the 1 - 2 shift. I haven't been back to the track since I got the Custom Tune from Runnin With The Devil. I'm hoping to get into the low 14's to high 13's with a converter and a shot of nitrous.

how does the truck feel after the turbo install? Any way to see your KR, and or LT, ST values?