XFI High Extreme energy Cam, any one like this cam? .584"/.579" 292/300
11-25-2006, 01:01 PM
#1
XFI High Extreme energy Cam, any one like this cam? .584"/.579" 292/300 Whats your take on this cam. What cam makes the best power because I didnt do so well with this cam. I've seen people with way less cam make way more power. I have a lot of work done to my engine Stage 3 porting on the heads.2.02 intake 1.60 valves 1.6rr's, 32lb injectors,this cam, hell of a dyno tune, headers, you name it, I got it. I should be doing better. I think my cam may be to big.
11-25-2006, 01:40 PM
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that cam is not to big for a 350ci motor,who did you'r heads???did they change the seats to put the 2.02/1.60 in them???how much power did it make???post the dyno sheet
11-25-2006, 02:36 PM
#6
I assume by your post that everything is running in tip top order. would i be correct in assuming this? If that isnt the case, did you do any porting to the intake? Do you have any other possible restrictions? Air/fuel ratio spot on and no knock? What type of springs are you running?
It sounds like a lot of cam but if you have enough flow to support it..then it should be fine. We need some more info.
-Brian
It sounds like a lot of cam but if you have enough flow to support it..then it should be fine. We need some more info.
-Brian
11-25-2006, 03:26 PM
#7
Well I have had the intake portmatched. Stage three portwork on the heads. i mean they are dug out. I still have the stock throttle body on the intake though. My air fuel ratio is on the spot... dyno tuned. Knock sensor delete. Comp cams heavy duty dual springs rated at .600" lift. I think I just went about my power package the wrong way.
This was in tip top order. I made my power at 6200rpm's.
This was in tip top order. I made my power at 6200rpm's.
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11-25-2006, 04:11 PM
#8
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ok who did the heads and the intake? none of the plugs are cracked or plug wires burned? you need to have the knock sensor on the get the timing right for detination and such.
11-25-2006, 05:34 PM
#9
JBZ racing. I just replaced the plugs and wires because I thought it was them . but it wasnt. New MAF, MAP, O2's, PCM, Reflash, Fuel Pump, Fuel Filter, Optispark,The only thing I havent replaced is the Coolant temp sensor. The car runs great when it's cold but when it goes into closed loop mode or gets warm....BOOM! The car freaks out. Backfiring sputtering anything after 2500-3000+rpms. It still idles great though.Just High like at 1300rpm's. Any one think it's a blown gasket of some sort? Header gaskets are all good.
11-26-2006, 10:07 AM
#13
Bigger does not mean better and that goes for heads as well as cam, and valves. The XFI lobes were desgned with Beehives in mind so maybe take another look at the springs if they are a "low pressure" dual they may not be up to the task.
I think you made a mistake in letting a local shop hack up a set of heads and put 2.02/1.6s in them, look at the results guys are getting with 2.00/1.56. I do not believe the motors we run on the street can take advantage of bigger than that. Not to say valve size is the problem I think it is just a symptom of a shop that didn't know enough about these castings to work them well.
I think you made a mistake in letting a local shop hack up a set of heads and put 2.02/1.6s in them, look at the results guys are getting with 2.00/1.56. I do not believe the motors we run on the street can take advantage of bigger than that. Not to say valve size is the problem I think it is just a symptom of a shop that didn't know enough about these castings to work them well.
11-26-2006, 11:08 AM
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Originally Posted by 96capricemgr
Bigger does not mean better and that goes for heads as well as cam, and valves. The XFI lobes were desgned with Beehives in mind so maybe take another look at the springs if they are a "low pressure" dual they may not be up to the task.
I think you made a mistake in letting a local shop hack up a set of heads and put 2.02/1.6s in them, look at the results guys are getting with 2.00/1.56. I do not believe the motors we run on the street can take advantage of bigger than that. Not to say valve size is the problem I think it is just a symptom of a shop that didn't know enough about these castings to work them well.
I think you made a mistake in letting a local shop hack up a set of heads and put 2.02/1.6s in them, look at the results guys are getting with 2.00/1.56. I do not believe the motors we run on the street can take advantage of bigger than that. Not to say valve size is the problem I think it is just a symptom of a shop that didn't know enough about these castings to work them well.
That's all very possible. There has to be something wrong besides that cam. I'd look at other things first. Start with the valvesprings.
11-26-2006, 08:43 PM
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XFI Cam I know of a 383 with 280cfm heads, 11,3:1 comp, and this cam putting 396/384 to the ground through 3.42 gears, 4L60E and 12 bolt. FLP did the tune and the torque curve is over 340 from 3000-5400 and a peak hp@5800 when the stock ignition failed to keep up. It was still building power when the miss started. 37lb Racetronix were at 68% under full load while tuning too.
Does this help?
Does this help?
11-26-2006, 08:49 PM
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Originally Posted by gota406
I know of a 383 with 280cfm heads, 11,3:1 comp, and this cam putting 396/384 to the ground through 3.42 gears, 4L60E and 12 bolt. FLP did the tune and the torque curve is over 340 from 3000-5400 and a peak hp@5800 when the stock ignition failed to keep up. It was still building power when the miss started. 37lb Racetronix were at 68% under full load while tuning too.
Does this help?
Does this help?
http://web.camaross.com/forums/showthread.php?t=485694
In other words, it's not too much cam if everything else is working right.
