How many people is running this cam, do you like it, etc...im thinking of buying it today.

 

Its really simular to the GM 847 cam, with a slightly more agressive ramp. It should perform really almost the same.

 

I've had several first hand dyno tuning/driving/hearing experiences with that cam. I have no objections. The choice should also depend on your heads/motor/driving habits though.

 

thanks, and since youve had first hand experience, i might holler at you about tuning

 

Just got that cam its an XFI 236-242 580-585 lift (111 lsa). Its going with my le2 head. Hoping to get around 400 wrhp. Ill let ya know how it is in about a week or so.

 

I would think with LE2 heads and bolt-ons (with tune) that should put you around 415 rwhp... Let us know.

 

The Gm 847 cam is a 234/242 .575/.595 112LSA and from what I know has some pretty slow Ramp rates. The XFI Lobe John is running (AKA nonosvt) is a Very fast ramp rate and is based off a Solid Roller profile. Thats why the 918 springs and 1.6 RR's are recommened for this setup

I have seen many Stock headed Lt1 cars make 350-360 RWHP with the GM847 cam, and XFI cam would make even more. THATS THE BEAUTY OF TECHNOLOGY

Ion you said you have tuned many Gm 847 cars and 236/242 setups but have you done an XFI lobe????
John's car is backed with a 3500 stall and 3:73's so getting in the powerband should not be to hard, we have lightend the car some as well, K-member ac delete, Welds, backseats, reloated battery, etc.

Just for reference with The GM 847 cam With phils AI heads
Waswa's 95 6-Speed Z28 rolled 412rwhp through full exhaust with our 180cc LT1 Head Package, a GM847 Hydraulic Roller, and a mail-order program on a stock 72,000 mile LT1 shortblock. Here is his dyno sheet. SAE corrected, the numbers were still 405rwhp & 371rwtq. Heres the graph
http://www.advancedinduction.com/Dyn...noPortDyno.jpg

Look were the car really starts to pull at about 3500 (right were John's stall kicks in peaks somewhere between 6200-6500 and holds it, not bad for a Le2 STYLE head and and 2.5 inch Y-pipe and a GAY RANDOM TECH catback, lol

 

The XFI lobes recently cam out and I havent gotten to look at their cam cards yet, but the XE cam that has the identical .050 specs is really close to the GM 847 but with a little more agressive ramps like I said.

I would like to take a look at the XFI cam myself.

I can say that one thing I did want different from the 847 is a more aggressive lobe with relatively the same specs as far as .050 and lift. I might try this XFI cam in the future.

 

That y-pipe turned out to be a 2 1/4 unit - just to note. Also - when we switched out to a 4L60E and 12 bolt the car lost a LOT of power and had to be tuned back up to 390 I believe.

The car didn't like the high rpms and did not last very long - spilling it's guts all over the road - internals were disintigrated.

 

If your talking about the XE 236/242...it's a decent cam, but there are better out there. I ran it for a while and made 393rwhp with inadequate valvesprings, stock lifters, and a AFR Rev-Kit. The agressive ramps killed my crappy valvetrain and the power dropped like a rock at high rpm...typical of most XE cam setups. Driveability was very good, better than the GM847.

 

i have the 987 springs i believe with comp r lifters.

 

I will see if I can get the cam card from John (If he will let me, lol).

I don't think 22RWHP is REAL BAD for a 12-bolt and a 6speed to Auto Swap. Was the tune fairly the same on both accouts??????

72,000+ miles on and LT1 with an aggresive heads and cam setup shifting at PROBABLY 6800 won't last too long IMHO, then again there are some that do . Phil is real secretive (LIKE everyone else) on cam specs but I am guessing there is roughly the same duration as the 236/242.

LT4POWR was that the cam Phil set you up with that the springs would not handle?? In his defense he was prolly not aware of how fast the ramp rates were, since a lot of people did not have much R&D time with them, I dunno just my opinion. Where did your cam make Peak power, If I had to guess I would say 6200.
Bret did however build you a smaller cam that made more Hp and TQ did he not, using the 918 beehives
I don't know if you can answer this but what Cam profile did he use on your Particular setup, You don't have to tell me specs I just want to know if it was say a XE, XFI, Magnum, ETC. Thanks

I can't remember the specs on the 987 springs but I would definatly look into the 918 beehives, Higher Revs, more stable valvetrain, lighter Valvetrain, more RPM MORE POWER, should even rev quicker.
I would be a little careful on the Comp R's sometimes they are fine and sometimes they have destroyed peoples motors. If you get them make sure you set them a Zero lash, Also I now they are quite expensive $450+ but I would look into the Morel lifters, you'll never have to buy Lifters Ever again .
Thats all I got for now

 

Yep, good work. IMO too much emphasis is placed on cam specs, and not enough on the valvetrain. I certainly wouldn’t go through the hassle of swapping a CC306 for an EX 236/242. As far as my lobes, I’d (and Bret would probably prefer) rather not say. My advise would be to look around currently (and search back) and see which lobes are and have been making power then go with those or pay a professional. My cam is also at least a year and a half old, so I don’t know what LE and BRE are using these days.

 

I totally agree, ITs the system or parts working together that makes the power, I think its Bret who always says you can have the sweetest heads, badest cam and if your valvesprings are inadequate then you ain't got anything
Aren't you running the Morel lifters nowadays how do you like them compared to anything else you have ran in the past.

Off topic but I just got my LE heads back today they started off as 195 LT4 AFR heads and are now a 216 chambered head, they have a 2.05 intake valve and a 1.60 Exhaust valve. They flow Enough Air I will say
I will see if I can get some pics of these badboys, Man I got the fever bad now, lol. These and my D1 will be bad . Should have not sold that Damn single plain after all, LOL

 

Would the 918s work with this cam and 1.6s? My AFRs can install springs around 1.90" if I work it right