What's going on here?

First Run
60' = 2.398
330 = 6.779
1/8 = 10.229
mph = 71.90
1000 = 13.194
1/4 = 15.694
mph = 90.34

Second Run
60' = 2.261
330 = 6.351
1/8 = 9.705
mph = 73.05
1000 = 12.611
1/4 = 15.067
mph = 91.82

It was around 45 degrees at the track tonight. I couldn't tell how badly I was spinning off the line. Couldn't ever really feel it hook up at all. The car seems to be lagging on the top end at WOT. Out on the street though, she's nice and strong, has plenty of power, and feels 10 times more powerful than she did when she was all stock.

All my mods

Anybody got any ideas?

 

you're 60 foots are way too high. definately a reason that your times weren't that great. your MPH is pretty low too. is this a 350? if so i'd recommend a tune-up for starters and try to figure out why it's running poorly.

 

well bro its hard to say i think your spinning to much i have alot of the mods you have except maybe the cam and roller rockers and my gtech meter said i was doing 15.3@93 mph which sucks if you ask me that was before my headers and 3" flowmaster system though.my car spins alot of the line also,im very dissapointed with my numbers too.

 

You have the MPH for high 14s, and cutting 3 tenths off your 60ft would put you at 14.7ish, which is about right for that MPH.

Since that's a 350, I'd recommend a nice thorough tune-up. That car sounds a bit slow for having 45ci more than mine.. Must have a poor tune. Do you burn chips at all?

 

I see you're near Lawrenceville if I have the right Bethlehem, Ga, you run that time up at the Atlanta Dragway in Commerce?

If so that's alot of your problem right there, the track is atleast a half second slower than times you'll see posted around on the net, if not more. It's elevation is only around 1200 ft so I can't explain it but it has a horrible reputation.

Last time I was there a stock LS1 Camaro was running multiple low/mid 14s, and a couple stock GTOs got some 14.5s... Happen to get the times for any relatively stock cars while you were there that would further substaniate this?

Anyway, try going down to Silver Dollar in Reynolds, Ga (assuming that isn't were you ran in which case...) before you panic too much. It's around 250 ft above sea level and has a much better reputation for times...

Sounds like you might have some tuning issues too though and definitely aren't getting much on your launch, either you're having major tuning probs or you were spinning pretty badly to get 2.3+ 60 foots.

And am I missing the headers in your mod list? You've got ported TPI stuff/SLP runners, a fairly hot cam, mildly upgraded stock heads, good cat-back and such but you're still choking it all down with the stock exhaust manifolds? If so you're leaving some power on the table right there. The rest I'm figuring is tied up in your tune, stock computer tune may not be liking that 219/219 cam...

 

Tuning will be your major downfall. A Hypertech chip and that cam with some mild headwork will be a bad combo. I have a simular combo with a ZZ4 cam which is smaller than yours and my car needed tuning in the worst way. You are changing your airflow delivery by modifying the MAF/plenum/runners/heads/headers/exhaust but you are trying to make it run on a basically stock program that has more timing at WOT than your stock bin. You will need to add some fuel uptop and probably get rid of timing if you are hoping to run optimal times with that combo.Just my opinion.

 

Yep, that's the track. It's only an hour away from my house. I decided to go up there and secretly get some time runs in before next spring when the whole club starts going again.
Silver Dollar is just too far for a Friday night.

I think I'm definitely going to go with you guys on this. I've heard that I can run my combo on a stock chip, but apparently not.
I was spinning off the line. It was cold as hell last night and no one was hooking worth a crap.

I probably forgot to put that in there. I've got a set of Hooker ceramic coated shorties on it. The only stock component I have on the car that has to do with breathing is the throttle body.

 

I just took my 88 Formula 305TPI to the track last night.
Only mods on the car are 3.73 gears, K&N filter, Flowmaster Muffler with the stock I-Pipe.

This it the best pass I made:
60'=2.021
330=6.198
1/8=9.680
MPH=71.78
1000'=12.702
1/4=15.239
MPH=90.98

3550# race weight.

 

I can never hook up at that track they dont prep it on test and tune nights. Before you start tearing into it check your timing and plugs. Also you might want to swap back to the stock chip to see if that helps.

 

In my opinion that cam is not right for your combination. For stock heads you need a dual pattern cam. Something on the line of the ZZ9 or the LT4 Hot Cam would be much better. Also like was posted above you need a custom EPROM for your car. Allen

 

The fact that you're only running 91 mph through the traps shows you're lacking in hp to run solidly down into the 14s, this has nothing to do with traction. I ran a 14.4 at 98.5 mph with traction issues (2.35 60 ft I think). If traction were your only problem, you'd be seeing mph that was higher than normal for your ET. I should have been running high 13s judging by my mph.

 

my car ran 15.3 @93 does that mean i have a traction problem? you know when you take off you need to feather the pedal a little so oyou dont just spin practice at taking off it makes a big difference.thats probably why you ran a 15.6 then a 15.0.

 

that camshaft would perform alot better with some cylinder head porting, and a good bowl blend. correct me if im wrong, but you state that larger valves were installed, was porting done at this time? also the stock base is also a bottleneck in your combination. this camshaft is designed with the superram in mind, but with your runners, and porting of the plenum, and base, it should perform better. i would try a set of sticky tires, you can work at getting your 60ft. in the 1.70 to 1.65 range. make sure your shift points are not too high. with your intake setup, you should not have to spin the engine over 4800 to 5000 rpm. also tune your timing and fuel pressure. this combo should run at least 13.00s @ 105. im not familiar with that tracks elevation, but that can definatley hurt your performance big time...tom also how many miles is on your car? maybe a leakdown test can rule out any poor ring sealing....tom

 

Maybe I should have been more specific on my mods page.
The intake plenum, runners, base and heads have all been ported and port matched. The heads are pretty heavily ported. The guy that did them put a lot of love into it. There's almost no more material to take out of the plenum, runners, or the base.
I'm going to look into the custom chip and try to make a few runs with it in the car before the end of the test-n-tune season and see what it does.
Also, the transmission seemed to be taking a little long to shift. I'm going to put the Corvette servo back in and see if that helps too.
I can physically feel the car running strong and hard all through the throttle range. When I hit it wide open though, it seems like there's just nothing there.

 

you know, this may sound a little dumb, but i admit that it has caught me once. mash the pedal to the floor with the engine off, and have a friend see if the throttle lever is fully open on the throttle body. somtimes even a thick floor mat can cause it to not fully open....tom

 

btw, what rpms are you at when the trans. finally does shift?

 

if its dying under load Id start checking things like fuel pressure and timing. there has to be something wrong there seeing as how my stock car runs a 15.1 @94mph and the et would be alot quicker if it would hook up off the line but mods are coming to fix that.

 

I'm sending a chip off to be burned later this week. I'm also going to try to get it back in time so I can go run next Friday night (last night of test-n-tune for the year).

 

Not trying to be an antaganist but if you are going to base your track times on the hopes of one chip, you will probably be disappointed. It is impossible to guess at timing and fuel. You need to datalog so that the changes you make are changes toward making the car faster. You will probably be way further ahead by next spring if you just bite the bullet now and buy everything needed to tune the car yourself.

 

try using less foot off the line.. ? dunno just sudg..