ameredith

I added a picture of three of my time slips from a test and tune. It was my first time on the track with the new set up and it was running constant times but the top end Mph was changing between 5-10mph for no known reason.. If anyone could help explain it would be great. The car is and M6 and was on a 28" Slick leaving at 5,300. The 60 ft could've definitely been better but the car was coming up then falling on its face, even leaving at 5,000+ rpm.. So any input would be greatly appreciated, thanks.

ameredith

Here is another time slip from the same night showing it doing 12.079@116mph

madmike9396

iTrader: (29)

Damn that's weird lol

HCI2000SS

iTrader: (2)

Maybe the nitrous was cutting in and out lol. But seriously that's very odd. The car act or feel different when doing this?

ameredith

The car is a N/A LS2 with H/C/I so no nitrous lol. And no it felt exactly the same every single pass but the speed would Just carry so much but you I couldn't notice

ameredith

Yeah I know haha!! I've talked to a handful of people and no one has really seen that before. Except maybe if the pcm picked up a knock and started pulling timing. But it still ran pretty close ET's so I have no clue

thunderstruck507

iTrader: (18)

I would suspect an issue with the timing equipment.

Roarin_8

iTrader: (5)

go to a different track and see if it happens there as well, you know "second" opinion

With that 1.7 to 1.8 60' and the 120mph range, the car should be in the 11s.

Deeohgie69

iTrader: (3)

^^^This, you should be easy mid 11's or better with that trap speed and your mods are probably good for even quicker. I'd definitely go to another tack.

Dirty Vegas

iTrader: (12)

Eh, I disagree. I've seen more h/c/i cars in the 12's than the 11's. Many more bad combos and compromised combos than good combos. Especially banger cars, it takes a good driver to ET, anyone can MPH.

To the OP, did you shift at the same RPM each pass? That would explain the MPH flux somewhat. Did you do any data logging? HPT? When did you last do any basic maintnence? Plugs, fuel filter, plug wires not burnt?

Deeohgie69

iTrader: (3)

Then that's some pretty horrible h/c/i cars imo. Mines a full weight car, and when I was "cam only", lid, long tubes, ory pipe, ss600 stall, cam I ran consistent 11.85-11.89 @116 with 2.73's and a fat tune. With 3.42's and the tune right it ran 11.67-11.72 @116.8's-117.2's.

Trap speeds don't lie (except his track here lol), but if he's trapping 120 then that's an easy mid 11 sec car in anyone's book.

Edit: seat time will improve et's

Dirty Vegas

iTrader: (12)

That's why I love grudge racing. My stock internal car went 11.68.... Cam only it went 11.20...

Deeohgie69

iTrader: (3)

I'm guessing a Camaro? How much weight reduction?

I kind of miss being n/a, I loved the sound of the cam and it was easier to get races.

Dirty Vegas

iTrader: (12)

Yeah, a 99 V6. It honestly had less weight reduction than you'd imagine. It still had a stock V8 k-member and a-arms, stock brakes, was on stock 16x8 wheels, still had door bars and rear crash bar, front door speakers, stock steering column/wheel. Lol, now that I think about it, I probably could have gotten it in the 10's stock internal if I got serious with the weight reduction.

scotty2000ss

iTrader: (2)

HCI in the low 12's? Got anymore of that

Dirty Vegas

iTrader: (12)

Lol, no need to look any further than your sig. A 400hp car going 12's?!?

2000 Camaro SS M6 Vert - 403/358 - SOLD - 12.307 @ 113.69 - Best trap - 116.xx

Deeohgie69

iTrader: (3)

If you had followed what was going on with him and his car, you'd probably know that it is a heavy convertible and a "cam only" m6, so you'd have to go farther. Some people like the luxury of having a full weight car and ac! He didn't want to launch too hard and break the 10 bolt on an m6, and also got kicked out of his track since he didn't have a cage. So he really didn't have the opportunity to pull the 11 sec cam only pass off.

But anyone knows that his trap speed is good for at least and 11.8's with an m6. So this v6 car of yours that ran 11.60's bolt-on, a4 I'm guessing? probably 3300 race weight (with you included), at least a 3600 stall, drag pack? It easy to throw stones when you have a roller car with cloth seats, no ac, other weight reduction with a stalled auto. So in theory, my "cam only" which was probably 3800+ with me in it, only full exhaust, lid, cam, stall would have been right on par with yours if it weighed what yours did. Actually about .1 faster since you usually gain .1 tenth for every 100lbs. I was far from fbo and probably could have ran 11.40's easily being full weight with a bigger cam, fast 102 and some free mods.

We were actually trying to give this guy hope and let him know that he's on the right track here to get the et's he wants without really having to do much. (which is the truth).......We didn't really need to go this far off topic to discuss our vehicles, but when someone try's saying that it's "common" for a h/c/I, which is usually aftermarket heads, or worked by AI, etc.., a decent sized cam, and a fast setup to only run 12's then the record needs to be set straight.

That is on the uncommon side even in a full weight car. It's more common to see cam only cars in the 12's and they sure aren't trapping 120+ unless they've had a hefty diet.

OP, keep doing what you're doing and you'll easily be into the 11's with some seat time. There's only one guy on this post saying the total opposite of everyone else, so just enjoy your car and post back once you get updates

Edit: referring to Scotty's sig, what H/C/I car do you know that only put down 403rwhp? Because they should drive that thing right into the river.

scotty2000ss

iTrader: (2)

Man, maybe I should let you build my next one

Deeohgie69

iTrader: (3)

Yeah, then you'd have been in the 10's Scotty.......9's with your vette

Dirty Vegas

iTrader: (12)

You should, at least it would run a respectable ET.

I had a C5Z 8 years ago, and it wasn't a 12 second car either.