BlackCowl

iTrader: (15)

They are etp CNC ported heads and a custom cam

30th t/a

iTrader: (51)

I'm not going to be any help here but your question reminded me of the same situation that my buddy had with his car. He had a H/C, A4 Vig 3600...ran low 12s at 112-113mph.
His car was full weight, 17s all around. I oftened wondered if it could have been the Vig 3600 that was hurting him. Here is his old post.
https://ls1tech.com/forums/12-second...-108-help.html

typedRew

I had the same thought, I was going to says congrats, good time and mph for SI.

Was not the case. :o

- Drew

BlackCowl

iTrader: (15)

Doesn't help

I know the car has a low mph, a decent 60, and can run faster than a 11.76. I mean cam only cars run this fast and I have decent ported heads.

Now can someone help me with the why part of it, or even better the "how to fix it solution"

I have 17" mt et street tires to run and I might be getting my hands on a chrs1313 intake. Other than than the only change I am making is running less tire pressure. Maybe adjusting the shocks I have. We'll see!

As far as ditching the slp intake? It's staying with this one for now unless I get a fully ported fast 102, fast toys intake, and a 102tb. So a good $1300 away at least. If I am going to get that I would just take the car it into the next phase with a cage and a 100-200 shot=more than double that!

Trust me i kno the ls6 intake is holding me back but I think this combo should have dynoed better. Better yet, I know the 10 bolt is holding me back, mwc want like 4 grand for a rear I wanna beat up on!

In the cars defece, it's the first time to the strip after sitting 7 years. Fresh motor and I didn't wanna break it. I did get on it that run and it shows compared to the rest. I am just wondering how long the auburn 10 bolt posi will last.

I have a video but don't know how to post it.

ANY HELP???

HCI2000SS

iTrader: (2)

You say the car has been sitting for 7 years and has a "fresh motor"....So the motor is basically brand new then?

scotty2000ss

iTrader: (2)

I guarantee its your gear and tire combo. I think the gear calculator says you're at 4800 going through the traps. That's not optimal.

Go back with the different tires set up and report back. Don't change your lid lol.

thunderstruck507

iTrader: (18)

What are your shift points set to (and confirmed with a logger, the stock tach is garbage and wildly inaccurate). They should be 6500 or higher I suspect. If it's shifting early it's going to kill your trap speed something fierce.

30th t/a

iTrader: (51)

The LS6 intake and the SLP are not the problem. I went 11.9@120 with them. Alot of people have gone faster using them.

Id definitely look into shift points.

BlackCowl

iTrader: (15)

Yes the motor has a little over 1100 miles. I'm going to put my 17" cragars on and run it. I'm also going to get in touch with the tuner about my shift points.

scotty2000ss

iTrader: (2)

Good deal!

Good luck and keep us posted

big hammer

What rpm are you shifting at?

codyvette

iTrader: (24)

It looks as though your AFR begins to creep back up further in the dyno run. This can begin detonation which would begin KR. Your tuner probably did fine with what he had to work with. I don't know your entire build but it is possible. Good luck and keep us posted.

BlackCowl

iTrader: (15)

Looks like it shifts a little over 6k and it's going back to the dyno as soon as they can get me in for a retune.

I'm not trying to put the people who tuned it on blast since they are a well known name here

big hammer

Judging by your dyno, which was cut off way to early, you should be shifting around 6700-6800

Dirty Vegas

iTrader: (12)

Have you looked into the shift points yet? 1.60 60' is decent. My last f-body went a 1.48 on a 275 26" Hoosier drag radial. What size is the cam?

BlackCowl

iTrader: (15)

I'm going back to get it retuned with a 275 17 mt drag radial. Not 100% sure on the cam but it sounds good and is a decent size.