280XFI Cam
02-19-2012, 03:21 AM
#21
Race Director
Which is why I posted the 1st link about it
Neat (Josh ) got the figures below with a 280 cam in his 383 MR w/ M6
LE Ported TFS 195's
Finished intake port volume 205 cc
Exhaust port finished volume 76 cc
.200 @ 140 / 108
.300 @ 200 / 144
.400 @ 245 / 176
.500 @ 274 / 190
.550 @ 280
.600 @ 282 / 204
Greatest RWHP achieved: 389
Best ET: 11.98
Best MPH: 119
Hmmm.....
02-19-2012, 12:48 PM
#24
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Heres the video1 http://www.youtube.com/watch?v=24KJe...8&feature=plcp
http://www.youtube.com/watch?v=17nKp...3&feature=plcp
Last edited by Vincentiroc; 02-19-2012 at 12:53 PM.
02-19-2012, 03:46 PM
#25
Safety Car
I had an 280XFI cam as it was recommended to me before I knew of this and other forums with people who could guide me better.
I made 419 in a 396LT1 with AFR heads, old 195's. But on another dyno it made 405. Same temp, but different dyno same brand and both were SAE.
Tuner can make a helluva difference too.
Who would you recommend for camshafts?
I made 419 in a 396LT1 with AFR heads, old 195's. But on another dyno it made 405. Same temp, but different dyno same brand and both were SAE.
Tuner can make a helluva difference too.
Who would you recommend for camshafts?
Different dyno's do read differently so comparing numbers from different people really isn't the best thing to do... espc with such a small window on power output. One mans 420 is another's 380.... I don't know why people are so hung up on comparing RWHP numbers that they don't even know where they came from....
Then again.... Yes I do. It's because 90% of the dyno racers out there never put their junk on the track so they can't do anything but speculate about how they have a 10 second car because they fanagled XXXRWHP out of it....
As for cam grinders. There are 3 guys I'd use today. These 3 guys will hit your combo dead on the first try.
Mike Jones did the cam in my 92. I'll let the motor speak for itself. Actual track results in my sig....
I have used cams from Harold Brookshire (UDHarrold) in the past. He designed alot of lobes for REED and Bullet cams bought what was left of UltraDyne Cams. 2 of his lobes (very similar to the 280XFI) are in a 383LT4 I built for blackharleyman (well documented engine build on this forum).
Chris Straub. This man went out of his way to help me fix a set of Morel lifters that got contaminated and damaged. I've bought a lot of valve train parts from him in the past couple of years and his stuff is top shelf. Very knowlegeable and good fellow to work with.
To the OP -
If you want a 12second 400RWHP car, with a good lick at idle and decent driveability and want to have what everybody else has then the Comp 280XFI is what you want.... If you want the same driveability and more power then call one the 3 cam guys I listed.
Will
02-19-2012, 05:13 PM
#26
Race Director
400ishRWHP is what the 280XFI is capable of. Depending on how good the heads are, how much compression it has and how much timing your tuner can squeeze out before it starts detonating, it can go 10-15HP in either direction.
Different dyno's do read differently so comparing numbers from different people really isn't the best thing to do... espc with such a small window on power output. One mans 420 is another's 380.... I don't know why people are so hung up on comparing RWHP numbers that they don't even know where they came from....
Then again.... Yes I do. It's because 90% of the dyno racers out there never put their junk on the track so they can't do anything but speculate about how they have a 10 second car because they fanagled XXXRWHP out of it....
As for cam grinders. There are 3 guys I'd use today. These 3 guys will hit your combo dead on the first try.
Mike Jones did the cam in my 92. I'll let the motor speak for itself. Actual track results in my sig....
I have used cams from Harold Brookshire (UDHarrold) in the past. He designed alot of lobes for REED and Bullet cams bought what was left of UltraDyne Cams. 2 of his lobes (very similar to the 280XFI) are in a 383LT4 I built for blackharleyman (well documented engine build on this forum).
Chris Straub. This man went out of his way to help me fix a set of Morel lifters that got contaminated and damaged. I've bought a lot of valve train parts from him in the past couple of years and his stuff is top shelf. Very knowlegeable and good fellow to work with.
To the OP -
If you want a 12second 400RWHP car, with a good lick at idle and decent driveability and want to have what everybody else has then the Comp 280XFI is what you want.... If you want the same driveability and more power then call one the 3 cam guys I listed.
Will
Different dyno's do read differently so comparing numbers from different people really isn't the best thing to do... espc with such a small window on power output. One mans 420 is another's 380.... I don't know why people are so hung up on comparing RWHP numbers that they don't even know where they came from....
Then again.... Yes I do. It's because 90% of the dyno racers out there never put their junk on the track so they can't do anything but speculate about how they have a 10 second car because they fanagled XXXRWHP out of it....
As for cam grinders. There are 3 guys I'd use today. These 3 guys will hit your combo dead on the first try.
Mike Jones did the cam in my 92. I'll let the motor speak for itself. Actual track results in my sig....
I have used cams from Harold Brookshire (UDHarrold) in the past. He designed alot of lobes for REED and Bullet cams bought what was left of UltraDyne Cams. 2 of his lobes (very similar to the 280XFI) are in a 383LT4 I built for blackharleyman (well documented engine build on this forum).
Chris Straub. This man went out of his way to help me fix a set of Morel lifters that got contaminated and damaged. I've bought a lot of valve train parts from him in the past couple of years and his stuff is top shelf. Very knowlegeable and good fellow to work with.
To the OP -
If you want a 12second 400RWHP car, with a good lick at idle and decent driveability and want to have what everybody else has then the Comp 280XFI is what you want.... If you want the same driveability and more power then call one the 3 cam guys I listed.
Will
02-19-2012, 05:34 PM
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02-20-2012, 01:29 PM
#29
Burning Brakes
400ishRWHP is what the 280XFI is capable of. Depending on how good the heads are, how much compression it has and how much timing your tuner can squeeze out before it starts detonating, it can go 10-15HP in either direction.
For cams, I've used Jones for my turbo car combo one. Worked well. I have a friend who used Harold Brookshire...406 single plane EFI car that went 10.41 at 132 all motor! Drove 5 hrs from the track too. Near 20mpg. Bad **** car.
I've used Bret Bauer for my old 383 and loved it and now have his cam in my new turbo combo. I expect it to work well.
But the XFI series seem to work well with good heads. Most agree the wide LSA hurts power. YOu can always order it on a tighter LSA for no extra charge I believe.
02-20-2012, 01:35 PM
#30
I've seen this cam run High 11's in a 383 6speed C4. Trick FLow CNC 195 heads & all the goodies. It never pulled quite as hard as my 383, AFR195 / CC306 setup but it was pretty damn close and was SOOOO much nicer to drive day to day.
02-20-2012, 02:12 PM
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02-20-2012, 02:25 PM
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12-30-2014, 12:41 PM
#35
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As of 12-20-14
Bringing this back from the dead. The IROC Z is up and running. Trickflow Heads fully ported flowing 303/217@.600 lift, Miniram 388cu and 280XFI Cam with 114LSA. 3.42 gears. Its just a dyno run for now. Will get track times sometime in January if the weather permits. 439whp@6300-399wtq@5100.
Last edited by Vincentiroc; 12-30-2014 at 06:17 PM. Reason: wrong gears info. Change from 3.24 to 3.42
12-30-2014, 01:54 PM
#36
Safety Car
Bringing this back from the dead. The IROC Z is up and running. Trickflow Heads fully ported flowing 303/217@.600 lift, Miniram 388cu and 280XFI Cam with 114LSA. 3.24 gears. Its just a dyno run for now. Will get track times sometime in January if the weather permits. 439whp@6300-399wtq@5100.
https://www.youtube.com/watch?v=O-s8L7dxjA8
https://www.youtube.com/watch?v=O-s8L7dxjA8
Those are good numbers and your HP and TQ peaks are where they should be considering the wider 114 Lobe centers.
You should have no trouble getting solidly in the 11's.... your a little light on rear gear with only a 3.24 ratio, but depending on tire and low gear in your tranny - It will proballly work OK.
Nice looking IROC... don't see too many clean tastefully modified 3rd Gens these days.
Will
12-30-2014, 06:19 PM
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02-20-2016, 01:06 AM
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Ok! Finally went to the track tonight. E.T. Sucks at 12:24 but the MPH was 119.62.
http://www.thirdgen.org/forums/south...times-san.html
http://www.thirdgen.org/forums/south...times-san.html
