OK, so i got a reply from comp cams the other day on a cam recomendation. Im willing o take more from you guys by he way. But heres the deal. I have an 02 A4 Z28, with full exhaust, motive 3.90s, lid P/P TB, SS4000 stall and other bolt-ons. Everything done to my car i either did, or had a hand in doing, but Ive nver done internal work before so im a virgin too cams. I know i need a set of heads and i know a million of you guys will tell me i do anyway, but considering with my 2 kids haouse and wife, its taken me 3 years to get this far, heads are alittle down the road, so its cam only fo now. Below are the specs, disect them and help me understand with first hand knowledge or if anybody has a similar set-up. Really what i want is an 11sec. car. Im deployed right now to Iraq, but will be home next month and have to install the stall listed above and alot of suspension, i ran 12.74 on my third pass before i deployed, and before stall, but with some ET streets. Do you guys think i have a reasonable goal cam only? for 11s that is?

INTAKE MASTER 3753R

EXHAUST MASTER 3755R

ENGINE LS1 XR277HR-12

GRIND NUMBER LS1 XR277HR-12

INT EXH

HYDRAULIC Y/N YES DUR @.050 224 228

INTAKE EXHAUST LOBE LIFT .3150 .3170

VALVE ADJUSTMENT HYD HYD ROCKER RATIO .00 .00

MAX GROSS VALVE LIFT .534 .537

DUR @ .006 TAPPET LIFT 277 281 LOBE SEPARATI 112.0

ADVANCE 2

VALVE TIMING OPEN CLOSE VALVE SPRINGS 26918-19

.006 INT 29 69

EXH 75 27

THESE SPECS ARE FOR CAM(S) INSTALLED

110.0 INTAKE CENTERLINE

 

The duration and lsa are good but the lift looks a little low. From what i see most cams run around .560-590sih lift. You should be able to hit 11s with a good tune. You dont NEED heads. I'm going for a 10.80 cam only. I am a good bit lighter than you though.

 

Comp Cams also make that cam with a .581 intake and .588 exhaust lift..I would go that way..you will make good power and with a tune you will be pleased with the manners and drivability of the car...not to mention your time slips...

 

^^^ Agreed. A little more lift would be better.

XE lobes?

 

thanx fellas. is this an over the shelf cam? custom grind? i basically mean, this is all chinese to me, so tell what i need, i mean, im tock internals lookin for a cam only. need the specs, so i can say here, i want this. goin for 11s

 

I would talk to someome other than Comp to spec your cam. If you call back three more times you will get a differant cam spec'ed everytime.

11's cam only with a 4k stall should be pretty easy.

 

i sent out some other requests, to like lunati, and another big name that starts with a c, nit sure if i can say their name on here.

 

so if i could get some ls6 heads cheap, how much better do you think i would be

 

224/228 .581/.588 112 LSA is a off the self grind from Comp Cams

 

looks like a good choice with traction 11s will be no problem...

 

and thats a good cam only cam? If i got heads later, would i need to up grade the cam? thanx for the relpys guys.

 

ok, latest info, another set of recommendations from another reputible cam company that is a non-sponsor so they will go nameless:

Part Number: 1449561 Grind Number: HR-216/3241-2S-15 (Z-CAM)
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1997 Up CHEVROLET 8 Performance cam for cars or trucks. Stock or w/mild engine modifications. Use in 5300-5.7-6000 engines. Good idle, slight chop. Must use 144832-16 valve springs. Auto or manual transmission. Good cam for supercharger w/PowerMax Tuner.
Engine Size Configuration
5.7 L V

Valve Setting: Intake .000 Exhaust .000 HOT

Lift: Intake @Cam 3241 @Valve 551 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 3241 @Valve 551
Rocker Arm Ratio 1.70

Cam Timing: TAPPET @.004
Lift: Opens Closes ADV Duration
Intake 25.0 BTDC 73.0 ABDC 278.0 °
Exhaust 78.0 BBDC 28.0 ATDC 286.0 °

Spring Requirements: Triple Dual Outer Inner
Part Number 144832
Loads Closed 112 LBS @ 1.800 or 1 13/16
Open 303 LBS @ 1.270
Recommended RPM range with matching components
Minimum RPM 1500
Maximum RPM 6000
Valve Float 6600

Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake (2.0) ATDC 38.0 ABDC 110 216.0 °
Exhaust 52.0 BBDC (8.0) BTDC 120 224.0 °

Remarks:
FIRING ORDER: 1-8-7-2-6-5-4-3

discuss!

 

bumpedy

 

I have another non sponsor you should talk to.

 

Here is what I recommend 230/230 .612/.592 111+2 LSA

This is a custom cam "El Torro", aka the Bull. power range 1800>6500, capable of 400+rwhp cam only A4 if installed properly.
low 11s for sure, 10s with proper setup.

 

go with what pred z said ^^^ he is a HIGHLY respected member here and a cam guru/expert, whatever you wanna say, hes one of the best.

 

Wow, thats incredible, and i have learned on my own that pred is a very knowledgable member. Thanx for the help. What else should i invest in with a cam like this. So far yours is the spec i like the most, thanx alot for taking the time.

 

Cam only:
7.425 pushrods and PP or PRC dual springs for .650 lifts

The specs are (Comp Cam Lobes)

Intake lobe: 3016R XFI
Exhaust Lobe 3725R XE-R
111 LSA (lobe separation angle)
109 ICL (intake centerline)

Give those to any sponsor carrying Comp cams and they can get it ground for ya.

 

thanx alot for all the help man. Im all about throwing as much as i can when it comes to reaching my goals, and so far i think im on track, people said do 3.73s, i did 3.90s, people said do a 3600 stall, so i did a 4000, and your recomendation so far is the steepest for a cam-only set-up, but being its you, someone with as much cred as you can get on here, i am definatly inclined to listen too you, so thax man.

 

you will like the cam...look at my times for proof,