Quazz

iTrader: (1)

Alright, i got some runs in at Great Lakes Dragway, and here are the results.

R/T .316

60' 2.006

330 5.471

1/8 8.333 @ 85.95MPH

1000 10.824

1/4 12.926

MPH 107.57

Mods:

383 LT1

GM847 Cam
Eagle Crank, Eagle Rods
SRP Forged Pistons (Not sure where the compression ratio is at)
1.6 Roller Rockers
Comp Springs (no idea on their rating)
42lb Injectors
LPE CAI
Pacesetter Longtubes
Magnaflow catback.. no cat lol
PCMforless tune
Built auto trans, stock gearing
Stock rear end
285/35/ZR18 Yokohama AVS sport tires out back, HTRZII fronts.

I was happy to get into the 12's. I have traction issues at launch, and when it shifts into second (gets a bit squirrley). I am taking off at Idle, because the brakes are too weak at idle (cam) to rev and launch. Any critiques, comments? suggestions?

LSWHO

iTrader: (1)

What was the da when you ran?

coolmanvette75

iTrader: (2)

If you get a trans break and get that 60' down a bit, then you will see much better numbers. Not bad though considering the conditions. Are the heads stock or ported?

Zmg00camaross

iTrader: (11)

Does this car have a Higher stall? If so this would improve your times also get some drag radials. That 2.0 60ft is killing you.

Quazz

iTrader: (1)

DA? whats that? LOL

Heads and intake are stock and untouched.

AFAIK, it has a stock converter in it. When the trans was re-done, I believe they put a new converter in and did kevlar clutch packs and a transgo shift kit.

I can't wait until I get ported heads, intake and DR's on this thing.

LSWHO

iTrader: (1)

What date and time did you run the car? I can look it up.

Da is air quality basically.

I'm guessing you were at 3000' or more.

Lawhead

iTrader: (14)

Those times are perfect then for what you have

coolmanvette75

iTrader: (2)

Yea the stock heads and intake are really killing you with the 847 cam. What are you shifting at?

LSWHO

iTrader: (1)

I've seen numerous 847s on stock heads peaking at 5800 rpm and making over 350whp with plenty of power under the curve. There are a LOT of misconceptions about that cam on stock heads.

LSWHO

iTrader: (1)

Only if the DA is 3000'+

If that was done at sea level da then they are lousy.

Lawhead

iTrader: (14)

Yeah but with stock heads, Stock Stall, Stock gears

Thats EVERYTHING you don't want with a huge cam like the GM847

LSWHO

iTrader: (1)

The gears and stall are terribly matched in his case, I was just pointing out the heads and what I assumed was beading towards "6800+ rpm minimum" even though what I've seen with the stock heads points to 6400ish.

bizerk1

yea, put a tq converter, some 373s and dr. And get a lca and a tq arm, I bet these would bump u up quite a bit. Yes the stock heads are probably killin u but I would do the others first.

coolmanvette75

iTrader: (2)

A cam with that much duration should not be peaking anywhere under 6k, unless there are other problems (fuel pressure, ignition, etc). To make maximum performance with the 847 cam with a stock top end, you need to be spinning it to around 6400 rpm, give or take. There are a lot more efficient cams for stock headed cars out there that make similar (or better) numbers without revving the **** out of it.

LSWHO

iTrader: (1)

it does. And with no problems.


I just said that. And if you spin to 6400 that means your peak is 6000 or less...

Efficient how? Those cams are also much more expensive typically.

And 6400rpm is not even close to what most would call "revving the **** out of."

whytryz28

iTrader: (28)

I ran an 8.4 at sea level with bolt ons only, that better not be the same DA as me.

LSWHO

iTrader: (1)

If he ran at 8pm tonight he was at 2800'

Quazz

iTrader: (1)

Date and time are as follows:

07-08-11 at 7:15 pm. Union grove is about 770 feet above mean sea level.

speed_demon24

iTrader: (6)

I would not be pleased if that was my car...

RamAir95TA

iTrader: (2)

His DA was right around 2300.

FWIW, with the stock heads, stock stall, 3.42s, shorties, and similar mods with an overly-sized cam I was running 12.5s @ 109 in 3000+ DA. Your times seem a bit slow for your mods. Not bad, but not blazing either.