yak

iTrader: (15)

Here's my two cents. As patrick G said before those heads are very forgiving. I've had good experiance running the LG G5X3. I've had it in my car for years now and it seems to always put down big numbers and back them up with fast times. For instance my car made 409 to the wheels on a mustang dyno through a built 6 speed. Now you can laugh at that number all you want since I still had a LS6 intake and pacesetter headers, i'm sure if I had a Fast 90/90 and a set of Kooks I could have seen at least 425. I made these numbers through a 35 Spline 9 inch. it was heavy as all hell and just turning it by hand with the *** end up in the air was a pain. Also, I had a set of old ported 853 heads. I'm sure with a more friendly driveline and some better bolt ons the car would have made some serious numbers.

Now, since dyno's don't tell everything lets get to the track... I took the car out a few times this summer, thurns out my bottom end was wearing out so i'm sure the car was down on power even more. First time out I went 12.1@117 spinning for a good 300', I was on some OLD dr's and a stock suspension. made some suspension changes, swapped the converter, fresher tires and I went 11.28@121 on a 28" tire. My car was probibly close to 3600# with me in it that day, so at the end of the day, LG makes good **** IMO. However, since i'm 90% sure my bottom end is toast and I now have a $700 set of paperweights to put on my desk I might go bigger and try the Vindicator since it seems to make good numbers and sound meaner as well.

Nitroused383

iTrader: (10)

239/251 .624/.624 111+3 47.5 IVC 59.5 EVO 23 degrees of overlap LSL lobes.

I would think it would pull real clean to 7000 rpm with a fast intake. How many rpm do you want to turn? Big split on the exhaust duration will help scavenge and pull a clean intake charge into the chamber for combustion. You have to pick your valve events based off of you intake manifold design. As a super victor intake will require a different set of valve events than a Fast intake. No point in designing a cam to spin 7500 rpm when a Fast intake will really choke off above 6800 rpm. It will be much happier with a cam designed for the operating range of the manifold.

chrs1313

iTrader: (24)

not really worried about traction, remember i am an a4, ...the stock elimator boys are using a 9" slick by 29.5 tall with the appropiate gear...

yes i an going keep the ss4000 and push it with this h/c/i setup if it does need to be stalled higher i can always get it reflashed to ss4400...

and i am going to be keeping the ported fast 92 as well...

wish me luck...are you still going to stay cam only or are you going to throw them ls6 heads on...

thanks for all the reponses...

chrs1313

iTrader: (24)

It is a XE-R/XE (high lift)

Intake 3731R
Exhaust 3656R

Cam 242/246 .610, .595 111+3 LSA

0.050
242/246
111>LSA
108>ICL


13>IVO
49>IVC
57>EVO
9>EVC
114>ECL
22*overlap

what are your opinions on this cam, this was recommend too, seems like a good cam...lift is a little lower, is more lift aways better (LSL lobes)?

Nitroused383

iTrader: (10)

Thats probably a good max effort cam for stock heads that backup around .600" lift. 49 IVC is a little out of range for the fast intake, probably lose a little midrange torque. XE lobes are pretty lazy compared to the lobe profile and ramp rate of the newer LSL lobes. If you are going max effort you will want to run some agressive ramp rates.

Patrick G

iTrader: (14)

There's a nice spreadsheet that's stickied in the Advanced Tech Section by J-Rod that you can download. The LSL lobes are 50 degrees larger at .006 than they are at .050".
That's correct, although I'd run the 235/243 112LSA cam without hesitation. Think of it as a 21st Century G5X3 with the newest lobes.
It will make your engine peak later, reduce your low-end torque and reduce your dynamic compression. For an automatic, 46-47 degrees is a really good place to be with 11.5:1 SCR.
The range I gave you is a sweet spot. Go to either side and you should expect to not be optimal.

quick346

iTrader: (4)

pat g told you what to do.listen up and learn

chrs1313

iTrader: (24)

that is what i am doing trying to understand why, hense the questions...no doubting here just trying to broaden my learning curve on cam specs...

chrs1313

iTrader: (24)

thanks again you are the man

i think i am going to go with the 2 cam...do you happen to have the lobe numbers, thanks a ton

PREDATOR-Z

Comp Cams LSL Lobes

13014R 265 215 139 .355” .604”
13015R 269 219 143 .357” .607”
13016R 273 223 147 .359” .610”
13017R 277 227 151 .361” .614”
13018R 281 231 154 .363” .617”
13019R 285 235 158 .365” .621”
13020R 289 239 162 .367” .624”
13021R 293 243 166 .367” .624”
13022R 297 247 169 .367” .624”
13023R 301 251 173 .367” .624”
13024R 305 255 176 .367” .624”
13025R 309 259 180 .367” .624”
13026R 313 263 183 .367” .624”
13027R 317 267 187 .367” .624”
13028R 321 271 190 .367” .624”
13029R 325 275 193 .367” .624”

9secondsflat

i have the vengeance vrx5 cam in my 383, its more then enough to pull to 7000 rpms and still makes power. for a 346 its a great cam.

chrs1313

iTrader: (24)

what are the specs of this cam

stumprrp

iTrader: (2)

why dont you keep the cam thats in there and add badass heads? i mean a trex or something like that needs to be spun 7000+ for best results, unless you dont really care then F go for it!

Kurtomac

iTrader: (5)

vrx5 is 236 238601 605 113+2 XER lobes

I removed the VRX5 when pat spec'd my cam

I run the 235 243 620 623 111+3 LSL grind with my TFS 215s

98blueSScamaro

iTrader: (14)

HHmmm what did your car put down and whats cars weight and 1/4 miles times?????

WeathermanShawn

iTrader: (1)

Hi chrs1313:

Can I ask who is doing the Head and Cam install? You or a shop? More curiosity than anything, but it might help to know.

I know you are trying to learn and want to get it right. But, you have some some very knowledgeable cam experts giving you some solid advice.

I would work those worksheets and see what you learn. But, as Patrick G stated, if you want to hit the sweet spot..go too big, and you will lose low end torque and DCR.

Predator-Z, can you share publicly what you think? I know you like reverse split cams. I am just curious what you think.

To the OP, you are getting some good advice. My only comment is try to resist the urge to goo too big. I know that is hard, but I would take the great advice you are getting.

This application is over my head, so I am really curious how it works out.

It is a good thread to follow and many of us are learning something new.

Thanks, and good luck in your pursuit.

..WeathermanShawn..

Kurtomac

iTrader: (5)

car is stock weight c5z06 with just a dragpack I just went 10.93 @128 with a weak 1.63 60ft (c5 6sp not an easy car to launch) on my 4th pass last sunday. Didnt powershift or anything...car did 465rwhpin 100 degree heat...i did 470 with the VRX5 but in cold weather...too many variables there...vrx5 i had LG 1 3/4 pro headers stock trans and diff....withthe new cam i had ARH 1 7/8 headers RPM 390 diff and RPM mn12 trans with 30 spline mainshaft...poo on the dyno numbers i went 127 with the old cam and my current headers and 128 with the new cam similar DA...heres some graphs
slip from sunday

pic of it at the track

uncorrected dyno graph LG pros stock diff and VRX5 Nov cool weather

SAE corrected dyno graph as is LSL cam

same with smoothing

mph overlay old cam 1 3/4 headers stock gears vs new cam 1 7/8 headers and gears...the red curve is the VRX5 and thats the corrected numbers...as above was uncorrected 483

98blueSScamaro

iTrader: (14)

Very nice setup And yes i know about the pain's of a m6 haha Cam only LS6 with the vindicator and i ran 10.88 @127mph so your car has alot left in it just get that 60 down and you should see 10.6x easy

98blueSScamaro

iTrader: (14)

Oh and start power shifting And you will see your 1/8th mile time get better and you should see a 101 to 102 mph in the 1/8th just from spot on power shifts.

1999BlueTA

iTrader: (34)

Why not just throw those TFS heads on your car with that proven little 230 cam that you have and if your not happy with the performace or it doesn't get you the time your after you could change it then I mean you have a good intake the only restriction I see is your stock heads but replacing them with a killer set of heads like the TFS 215's they will let your intake breathe and make your cam work better. I'm not an expert at this but your car is running damn stong your not far from your goals I think the heads will get you there if your set on changing cams though I would go with some thing the size of the G5x4 on some of the new lobes maybe xfi intake/xer exhuast lobes or on LSL lobes but with all of the great advice from PatrickG, PredatorZ and other's and the research your doing i'm sure the cam that you choose will be the right one, Good luck on your build.