Dyno'd the LT1 IROC today
#1
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Dyno'd the LT1 IROC today
Well just got in from the dyno, the car was previously set up for nitrous so there is some timming backed out of it, and the rev limited is set too low. He could only rev it up to 5850RPM and it kept climbing. He said if I bring it it for a tune I should be at 350-355 RWHP.
Plans are to swap the Hotcam out for a GM847, possible 1 3/4 long tubes and maybe spray it over the winter.
Three runs made
Run 1
311.2HP@5640RPM, 310.7ft.lbs@4880
Run 2
309.6HP@5540RPM, 306.9ft.lbs@4740RPM
Run 3
312.8HP@5640RPM, 309.0ft.lbs@4780RPM
http://videos.streetfire.net/video/f...b901461bbd.htm
http://videos.streetfire.net/video/7...b9014c8980.htm
Over all I am a little bummed bc I was hoping for 350 but all I can think is it does a 12.9@107 now and There is A LOT left in the motor, and after the cam, headers, N2O I am hoping for a High 11.
I am also getting a 8.8" with 3.55s fabbed up over the winter, I just need to find a site that has some info about the axles etc.
I am waiting for the videos to upload so I shall post them shortly.
Jay
Plans are to swap the Hotcam out for a GM847, possible 1 3/4 long tubes and maybe spray it over the winter.
Three runs made
Run 1
311.2HP@5640RPM, 310.7ft.lbs@4880
Run 2
309.6HP@5540RPM, 306.9ft.lbs@4740RPM
Run 3
312.8HP@5640RPM, 309.0ft.lbs@4780RPM
http://videos.streetfire.net/video/f...b901461bbd.htm
http://videos.streetfire.net/video/7...b9014c8980.htm
Over all I am a little bummed bc I was hoping for 350 but all I can think is it does a 12.9@107 now and There is A LOT left in the motor, and after the cam, headers, N2O I am hoping for a High 11.
I am also getting a 8.8" with 3.55s fabbed up over the winter, I just need to find a site that has some info about the axles etc.
I am waiting for the videos to upload so I shall post them shortly.
Jay
Last edited by jay_rich; 09-30-2007 at 07:08 PM.
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Yea theres definetly alot left in the motor man. you can spin it almost 1000 rpms higher you will see more power and time!
Sounds like a pretty nice car. What does it weigh? I thought thos 80's were pretty light.
Sounds like a pretty nice car. What does it weigh? I thought thos 80's were pretty light.
#4
Originally Posted by jay_rich
Well just got in from the dyno, the car was previously set up for nitrous so there is some timming backed out of it, and the rev limited is set too low. He could only rev it up to 5850RPM and it kept climbing. He said if I bring it it for a tune I should be at 350-355 RWHP.
Plans are to swap the Hotcam out for a GM847, possible 1 3/4 long tubes and maybe spray it over the winter.
Three runs made
Run 1
311.2HP@5640RPM, 310.7ft.lbs@4880
Run 2
309.6HP@5540RPM, 306.9ft.lbs@4740RPM
Run 3
312.8HP@5640RPM, 309.0ft.lbs@4780RPM
http://videos.streetfire.net/video/f...b901461bbd.htm
http://videos.streetfire.net/video/7...b9014c8980.htm
Over all I am a little bummed bc I was hoping for 350 but all I can think is it does a 12.9@107 now and There is A LOT left in the motor, and after the cam, headers, N2O I am hoping for a High 11.
I am also getting a 8.8" with 3.55s fabbed up over the winter, I just need to find a site that has some info about the axles etc.
I am waiting for the videos to upload so I shall post them shortly.
Jay
Plans are to swap the Hotcam out for a GM847, possible 1 3/4 long tubes and maybe spray it over the winter.
Three runs made
Run 1
311.2HP@5640RPM, 310.7ft.lbs@4880
Run 2
309.6HP@5540RPM, 306.9ft.lbs@4740RPM
Run 3
312.8HP@5640RPM, 309.0ft.lbs@4780RPM
http://videos.streetfire.net/video/f...b901461bbd.htm
http://videos.streetfire.net/video/7...b9014c8980.htm
Over all I am a little bummed bc I was hoping for 350 but all I can think is it does a 12.9@107 now and There is A LOT left in the motor, and after the cam, headers, N2O I am hoping for a High 11.
I am also getting a 8.8" with 3.55s fabbed up over the winter, I just need to find a site that has some info about the axles etc.
I am waiting for the videos to upload so I shall post them shortly.
Jay
BTW - I would not go 847 in a low cube LT1. Too much cam and will want to spin too high to make decent times...Unless you like your autos with 4.10 gears and 4k stalls