xfi 292 cam
03-30-2010, 02:21 AM
#41
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errr the pic is crackys dyno graph (dyno sheet xfi292)
as you can see in the pic, power drops slightly after 6200 mark, right were comp advertises, he said it would wind to the moon, but he always shifted at 6500, hence why the dyno stopped there.
video of car
http://s16.photobucket.com/albums/b3...urnouts033.flv
2nd video
http://www.streetfire.net/video/crac...ust_131247.htm
now i have asked this question over at thirdgen.org where me and orr have been talking about it.
heres the thread : http://www.thirdgen.org/techboard/al...r-today-3.html
i also posted several dyno tests of 327 and a 355 with much bigger cams showing how the xfi should peak and proved to peak at around 6200 with crackys car. 380rwhp is stout, and i think i will have his crawford heads beat with my afr 195 eliminators, stealthram gasket matched to the 1205, 58mm tb, 30lb injectors, full 4340 forged eagle bottomend.
so heres my question, why is it, that everyone says a 292 xfi cam will peak at 7000+ rpm, when in the thread i showed a 327 with a much bigger cam peaking at 7000? surley 33ci more could drop the peak in a 350 from 6000 to 6500.
i have been hearing people running that cam winding it to 7000 rpm, but i have only seen 1 dyno sheet and thats crackys.
any thoughts?
as you can see in the pic, power drops slightly after 6200 mark, right were comp advertises, he said it would wind to the moon, but he always shifted at 6500, hence why the dyno stopped there.
video of car
http://s16.photobucket.com/albums/b3...urnouts033.flv
2nd video
http://www.streetfire.net/video/crac...ust_131247.htm
now i have asked this question over at thirdgen.org where me and orr have been talking about it.
heres the thread : http://www.thirdgen.org/techboard/al...r-today-3.html
i also posted several dyno tests of 327 and a 355 with much bigger cams showing how the xfi should peak and proved to peak at around 6200 with crackys car. 380rwhp is stout, and i think i will have his crawford heads beat with my afr 195 eliminators, stealthram gasket matched to the 1205, 58mm tb, 30lb injectors, full 4340 forged eagle bottomend.
so heres my question, why is it, that everyone says a 292 xfi cam will peak at 7000+ rpm, when in the thread i showed a 327 with a much bigger cam peaking at 7000? surley 33ci more could drop the peak in a 350 from 6000 to 6500.
i have been hearing people running that cam winding it to 7000 rpm, but i have only seen 1 dyno sheet and thats crackys.
any thoughts?
03-30-2010, 05:18 AM
#42
there's more to it than just duration dude. look at the cam in that last motor you linked... 102 ICL! their IVC is going to be SOONER than the 292 with its ridiculous 113 lsa. That and look at the 3" intake runner length of the LT1 manifold, i doesn't need a 113 lsa to rev out, nor does it need tons of intake duration. I will tell you one thing, short runner intake+big duration+wide lsa is going to want LOTS of rpm, and is going to perform like **** in the midrange. The 292 doesn't have enough overlap to make real good power numbers for its size (duration)
03-30-2010, 05:19 AM
#43
I don't see it, where is the dyno graph?
Did it peak and fall because of valve float?
Crappy heads will make it peak early too fergymoto used Lingenfelter heads and it did not peak by 7000rpms.
I have a cam under 230 degrees that peaks about 6400 and due to good valvetrain is still making good power at 7000rpms.
As explained a hundred times the rpms discrepancy is because of the ultra short LT1 intake runners.
Did it peak and fall because of valve float?
Crappy heads will make it peak early too fergymoto used Lingenfelter heads and it did not peak by 7000rpms.
I have a cam under 230 degrees that peaks about 6400 and due to good valvetrain is still making good power at 7000rpms.
As explained a hundred times the rpms discrepancy is because of the ultra short LT1 intake runners.
03-30-2010, 06:49 PM
#44
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dyno sheet http://www.thirdgen.org/techboard/at...today-dyno.jpg
he had crawford ported heads m6 transmission.
he had crawford ported heads m6 transmission.
Last edited by badgta; 03-30-2010 at 07:07 PM.
03-30-2010, 08:52 PM
#45
Apparently you have to be a member of that forum to view pics there so I can't see it.
Headers, exhaust or an intake restriction could affect numbers too.
380rwhp is not a bad number but at the same time guys are making 420+ on stock shortblocks with cams under 230degrees so 380 is not a particularly good number either.
Headers, exhaust or an intake restriction could affect numbers too.
380rwhp is not a bad number but at the same time guys are making 420+ on stock shortblocks with cams under 230degrees so 380 is not a particularly good number either.
Last edited by 96capricemgr; 03-30-2010 at 09:00 PM.
03-30-2010, 10:04 PM
#47
I made 385rwhp with the 292 cam on a stock short block. I never had my AI 226/234 cam on a dyno but it ran the same track numbers on a mail order tune with the rest of the car being the same setup as it was when I had the 292 (which was dyno tuned)
03-30-2010, 10:53 PM
#48
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popular hotroding camorama has edelbrock lt4 package on a 377 that peaks 500hp at 6400rpm. it looks like youll need atleast a 11.5 compression 383 to get her to start to move in the midrange.
03-31-2010, 12:14 AM
#49
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Apparently you have to be a member of that forum to view pics there so I can't see it.
Headers, exhaust or an intake restriction could affect numbers too.
380rwhp is not a bad number but at the same time guys are making 420+ on stock shortblocks with cams under 230degrees so 380 is not a particularly good number either.
Headers, exhaust or an intake restriction could affect numbers too.
380rwhp is not a bad number but at the same time guys are making 420+ on stock shortblocks with cams under 230degrees so 380 is not a particularly good number either.
myself i am building a 355 all 4340 eagle componets, afr 195 eliminators 9.2:1 compression for a future boost add on, and a holley stealthram intake with 30lb injectors. everything on this car is aftermarket waiting to be bolted on, full suspension, moser 9" with 4.56 gears, i am setting it up for the 1/8 mile with a t56 trans. like to get into the 6.75 range if at all possible, thats low `11's right? would love to see 400+whp, would tickle me to death and is what i am aiming for.
03-31-2010, 07:25 AM
#51
do you have any links to those combos? id like to se what all they done and what cams they used..
myself i am building a 355 all 4340 eagle componets, afr 195 eliminators 9.2:1 compression for a future boost add on, and a holley stealthram intake with 30lb injectors. everything on this car is aftermarket waiting to be bolted on, full suspension, moser 9" with 4.56 gears, i am setting it up for the 1/8 mile with a t56 trans. like to get into the 6.75 range if at all possible, thats low `11's right? would love to see 400+whp, would tickle me to death and is what i am aiming for.
myself i am building a 355 all 4340 eagle componets, afr 195 eliminators 9.2:1 compression for a future boost add on, and a holley stealthram intake with 30lb injectors. everything on this car is aftermarket waiting to be bolted on, full suspension, moser 9" with 4.56 gears, i am setting it up for the 1/8 mile with a t56 trans. like to get into the 6.75 range if at all possible, thats low `11's right? would love to see 400+whp, would tickle me to death and is what i am aiming for.
