94bamf

This looks like the perfect cam for my GTO. Which cam do you guys think would be better for a 3800lb GTO? 113 or 115 lobe sep?


" THE BOSS "
STREET / STRIP CAM
RPM RANGE 2200 TO 6200
TUNING & STALL CONVERTER REQUIRED
STILL HAS PLENTY OF "TORQUE"
POWERFUL CHOPPY IDLE
DUR @ .004" 278*/286*
DUR @ .050" 216*/224*
LIFT .551/.551
OVERLAP 57*
LSA 113*


"BOSS 2"
STREET / STRIP CAM / AUTOCROSS
RPM RANGE 1500 TO 6200
TUNING & STALL CONVERTER DESIRED
PLENTY OF "TORQUE"
POWERFUL CHOPPY IDLE
DUR @ .004" 278*/286*
DUR @ .050" 216*/224*
LIFT .551/.551
OVERLAP 53*
LSA 115*
SAME AS THE BOSS WITH BETTER LOW END

Mods for the GTO will be.......
CAI
Offroad midpipes and catback 2.5 inch
Ported Throttle body
ASP underdrive pulley
Vig 3200 converter
Trans cooler
HP tuners

They even have a sound clip for the BOSS......... sounds mean.....

LINK

smask04C5

iTrader: (1)

have an 04 a4 vette convertible with donaldson, crane 1.8 rocker kit and magnaflow exhaust. in process of adding ported ls6 heads, boss 2 cam, ati underdrive damper. roger at VHP suggested this cam, post results when complete

marc_w

I'm running the 047 (210/218 .531" 112) in my 6.0 truck.

This is about as rowdy as I'd like to go for my high-mile, daily commuter, tow/haul/street/strip truck.

The powerband quite noticeably lights-off right around 1,800 rpm. From there, it's very smooth, strong, clean power to 6K (or more). Very quick throttle responce. It's very strong at part throttle and lower rpm situations. Idle is very fair. A slight cackle at 600-650rpm. Very easy/responsive to tuning.

Power is "adequate" under 1,500. Probably on par with a 5.3L motor in my truck. I had to bump my TCC lockup points up by about 10mph to keep my motor out of this range. It made a world of a difference. Otherwise, the loss of power down there is quite hard to notice.

I was in a very similar situation as you. I had my cam with the choice of 112 or 114 LSA. I'm very happy that I went with the 112.

I love the way the cam wakes up at 1,800, and the amount of torque available when 'it's on'. It makes a very fun-driving poweband, even with my stock 'converetered' slushbox. From what I understood, the 114 will be less "cammy" (where it wakes up), with a little less torque in the midrange.

This cam, drop-in air filter, tuning, and cat-back exhaust in my ~5400lb, AWD, 20 gallons of gas, full street-weight truck = 2.13 60', 14.56 @ 92.0

2k2blkss

I plan on running this one from VHP very soon...
It's number 048
DUR @ .004" 286*/290*
DUR @ .050" 224*/228*
LIFT .551/.551
OVERLAP 55*
LSA 116*

nuzee

iTrader: (2)

Because you'll being running a VIG 3200, go with the tighter lsa cam. Marc_w sums it up well. The tighter the lsa, the more noticeable the pull in the cam's powerband. One of the tradeoffs with a tighter lsa cam is that once past the top of the powerband, the power will drop off much more quickly than a wide lsa cam. So make sure that you select your cam with enough duration to create a powerband that will suit your needs. BTW, those Boss cams sound like great hi-po street cams.

jz06man

I am currently running the 062 cam-

DUR @ .004" 272*/280*
DUR @ .050" 210*/218*
LIFT .551 / .551
OVERLAP 52*
LSA 112
The same as the 047, but with higher lift... The cam idles good to fair- I'm alittle sensitive to hard or rocky cams at idle... The cam like Marc_w 's 047 wakes up for me at 1500 and is fairly strong at 2000. the cam is faily linier in power to red line for just takes off at 4000...

I wish this Boss 2 cam was avaliable 3 months ago, because i too i'm intrested in this. Looking at the cam spec's for the boss 2-
DUR @ .004" 278*/286*,
DUR @ .050" 216*/224*
LIFT .551/.551
OVERLAP 53*
LSA 115* This cam should idle similarly to the 047 and 062- look at the cam overlap 52(047,062) vs 53(056).
Since i have the VHP 1.79-1.72 rockers, the 056 without the VHP rockers should be near the same as the 047/062 with the rockers- Which is have to say is good to acceptable , but is more powerful that the stock Z06 cam.


This Boss-2 cam should make 10-20 hp more that the 047/062, but 5-10 ft of torque less.....

All in all, this cam should be a very good choice-

Currently i am at 420rwhp & 405rwtq, with the normal bolt-on's & a stage 2 head...

nuzee

iTrader: (2)

Nice numbers, especially the torque. At what rpm are you hitting 420 hp?

marc_w

jz06 - I actually just got an email back from Roger on the Boss2.

I was asking their thoughts on me upgrading my 047, when I do AFR heads this spring. I was asking if it would be worth it for me to go to the .020" higher lift 062 (not available when I got the 047), or upgrade to the Boss2/Trucker cam, and his thoughs on rockers on any of those cams.

I hope he doesn't mind me reiterating what he wrote...

What Roger said, was that the 047 was designed for brute torque. I definitely agree.

I mentioned that I love the torque and snappy throttle responce of the 047, and that I don't want to give much of that up. He said any other (bigger) cam (other than the two Asp-Kickers) I choose, will be a bit softer.

Power wise - He said in comparison of the Asp-Kickers (047, 062), the Boss2/Trucker would make MUCH more power above 3,000, but they will be much weaker below.

Idle quality - the 062 will have a little more thump than the 047, but not as much as the Boss2/Trucker.

marc_w

I DEFINITELY agree! I didn't catch that before...

I would "guess" that the 420 is in the lower 6,000's. I wouldnt' be terribly surprised to hear it's in the high 5's to 6,000 flat. The 047 dyno on the VHP site shows it peaking around 5,800 or so.

I would love to hear the number you're hitting peak torque too.

In HPTuners, I'm scanning "delivered torque". If you'll allow me to plot a cheap 'graph'... I don't know how these numbers evaluate to 'real life' numbers but...

350ft/lbs as low as 2,100-2,200rpm... 380 at 2,300... 408 at 3,300- 3,900... 400 at 4,000... 397 at 4,800. -- To be honest, I can't find any data in the 5,000-6,000 range. I don't spend much time there. I do have some hits of 346 at 5,200 at 75% throttle.

Power seems to be quite broad, and quite strong from ~2,500-4,800. Peaking in the mid to higher 3K range?

I need to find myself an AWD dyno to get some real numbers.

jz06man

ok, my numbers are as follows:

My peak 420 is at 6200, but it makes 405-420-peak to 410- all this from 5400-6700, it drops to 402 at 6800 fuel cut off.
The torque numbers are peak 405 at 4700 but is 375 or higher from 3700 to 5800..at 3000 it's 355, so it's 355tq or higher 3K-6.2K!!! all this at the rear wheels of course.

Marc, so Vinci's says the 056-Boss-2 is much/ a bit higher at the top but alot or a bit softer at the bottom??? Did he give you peak hp and peak tQ possibilities vs the 047 or 062????

I like you do not want to lose much low end to pick up at the top, but if the numbers are peak hp pickup of 10-20hp and losing 5-10 tq at the bottom, this might be a good trade off- Since I'm looking to install a FAST intake syetem any way....

marc_w

Very sweet numbers...

Yeah, the way Roger emphasized the Boss2/Trucker was that it would make much more power up above 3K, but they are also much weaker down below. Those are almost exact words there.

I would definitely shoot him an email or call them up. He said if I go with a set of heads, and bump the CR up, he'd probably recommend the Boss2/Trucker to me. I'm thinking that for now I'll stick with the A** Kickers for the torque and all the street driving and occasional towing I do.

jz06man

Marc,

thanks for the info- I pm'ed you... I assume you have a cold air intake.

marc_w

No problem at all..

Intake - I'm actually on the stock 'box with a drop-in filter.

Not to go way off topic, but I had an intake before, but the tube to the TB cracked. I modded the heck out of a stock 'box, and I wan't happy with any version I could come up with besides the bone stock factory one with a filter in it. (I had a true ram-air w/duct at the bumper, a simple sealed off cold-air w/duct behind the bumper, and then additional 'breathing' holes - they all had their quirks.)

jz06man

I just spoke to Vinici on my issues....

I would adivise you to look at another cold air intake... This should/can give you 5-15 hp and similar torque figures..
I would ask ask Vinici for some advice, I think you still have a few easy hp & torque to pickup without ging to the next cam.

After speking to Roger, I'll upgrade to the 1.89 rockers before the boss 2 cam. then possible the boos-2 cam- The boos-2 will still give too much, for my taste, TQ down low.

jz06man

I'll also upgrade in the spring to a new cold air intake..
I have the Blackwing, but I know i can get a 5-10 hp with a cold air box or a VR-1

RevGTO

iTrader: (12)

I know this thread is a few days old, but would anyone care to comment on the torque curve of the cam mentioned above? I have to say I've never seen an LS1 dyno curve like it. Max torque is 428@2700 and max hp is 342@5900. The torque curve declines precipitously from the peak, though it is 390@4000 and 355@5000. More like LT1 than LS1. I know this is old stuff, but would anyone care to comment?

94bamf

Guessing, I would say this is due to a torque converter, not the actual torque from the engine. It looks like the real torque peak might be 3800-3900rpm.

marc_w

Yeah, I'm pretty sure (almost certain) that the dyno on the VHP site is with an unlocked 2800rpm stall.

FWIW, I made some more "poor man's dyno runs" using HPTuners on the street here after I spend the weekend tuning. The numbers are in ft/lbs - but I can't tell you how accurate or inaccurate they are - just check out the flat torque availabe: 390 at 2,100rpm - 400 at 2,500 - 425 at 3,600 - 400 at 5,000 - 345 at 6,000.

That was from two "runs", which were very consistant between the two. One, a blast through first, the other a pull through second. Both had good hits of false KR I'm trying to weed out, so timing varied from high-teens to 26*.

I haven't got any data under 2,100rpm - that's where my stock converter is flashing to.

mrr23

iTrader: (3)

yes that is an unlocked VHP/Yank 2800 converter in the car prior to the cam swap.
here's everything about the car and the tests they performed here: http://www.vincihighperformance.com/...ARPARENT2.HTML

RevGTO

iTrader: (12)

Duh ... makes perfect sense - good ol' torque multiplication. Odd way to dyno a car, though.