SlvrSierra4.8

iTrader: (24)

Took the truck to HRP tonight w/ hopes of hitting a 14.xx at 90+ mph after the camswap. Ran a new personal best, but only reached half of my goal....... (timeslip below). Also cut .065 R/T on my second pass, but that run netted me a slower E/T and MPH.

Mods to date:
-05' RCSB 4.8/Auto
-Comp 206/212 on a 112 lsa
-Volant CAI, Shaner Ported TB, 180 T-Stat, Corsa Catback, Wheatley Tune
-Eaton w/ 3.73's
-Corvette Servo

Previous Best before cam, servo, and retune:
R/T ... .379
60' ... 2.375
330 ... 6.546
1/8 ... 9.991
MPH ... 71.97
1000 ... 12.925
1/4 ... 15.41
MPH ... 89.90

New Best w/ Cam/Retune:
R/T ... .380
60' ... 2.371
330 ... 6.470
1/8 ... 9.807
MPH ... 74.33
1000 ... 12.653
1/4 ... 15.035
MPH ... 94.67

.4 faster 4.77 mph improvement w/ just the camswap, not bad considering the size of the cam just seems like there should be more in it.

MPH seems like it should be good for a mid 14 sec pass, but Im a solid .5 sec away. I realize my 60' sucks which I can attribute to the stock convertor, but what gives? Is a lack of a convertor my only issue here? I'm sure LT's wouldnt hurt either, but my ET should be better IMO.

Let me know what guys think, any help is appreciated...

QLF

You have the trap speed, but you're lacking a good bit in your 60', like you've already noticed, and your 1/8th E.T. is a little on the slowish side. A good stall should drop you around 3 tenths if you can hook and the LT's will help your mid range pull a good bit.

sonoma43

iTrader: (1)

amen to that!

GMCtrk

iTrader: (27)

shoulda kept the LTs that are now solidly attached to my cylinder heads

I think the obvious answer for you is bigger cam, stall, and LT's, and 4.10s/trutrac to put you solidly into the 13s...

regency

iTrader: (15)

weather (DA) worse?

another thing i can think of is heatsoaked MAF. did you sit in the staging lanes idling?

SlvrSierra4.8

iTrader: (24)

Agreed, 1/8th did seem slow to me as well. Seems it is gaining alot on the big end of the track, but lagging alot until the 1/8th

lol, I hear ya on the headers. Cam isn't going anywhere anytime soon, but some 4.10's and a convertor may be on the to-do list. Installed an Eaton LSD when I did the 3.73's so no need for the tru-trac.
On my first pass no, truck was probably at 160-170. Second pass was hotlapped so that is possible


-So the general concensus is the lack of convertor? What should my MPH be good for ET wise?

zippy

Lack of converter for sure. Get that fixed and you'll pick up a good .5 or so and some more mph.

Wheatley

iTrader: (12)

You really need a converter and it will run so much better

99Silverado5.3

iTrader: (7)

MPH is about right for your mods. It's that 60' that's killing you.

SlvrSierra4.8

iTrader: (24)

Thanks for the input fellas. Pretty much confirms my thoughts..... what do you guys recommend convertor-wise? Would I be wasting my time w/ anything less than a 3000 stall givin that it is a 4.8?