New 5.3 Record 10.78 on 250 shot
09-09-2010, 07:10 PM
#13
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I know but it's just a 5.3 and believe me it's hard to move that tranny with a small converter and higher gears. I usually would'nt use anything lower than 4.56 i made the decision to try those gears and converter combo cause its a small motor. The gearing seems fine cause it would probably come out at around 6900-7k rpm if it had'nt shifted to 4th. Unless i was planning on trapping more mph i would change it but we'll see maybe it will help our 60 with 4.56
09-09-2010, 07:19 PM
#15
Here is the video of the 10.7 run last night. Set up is stock bottom 5.3 with cnc 243 heads, victor jr with plate 90mm tb, 4.88 gears, 232/240 cam, 4k PI converter, speed density tuned by me. Im sure i missed something. Race weight 4300#
http://www.youtube.com/watch?v=OKqzisTlTe0
http://www.youtube.com/watch?v=OKqzisTlTe0
I know but it's just a 5.3 and believe me it's hard to move that tranny with a small converter and higher gears. I usually would'nt use anything lower than 4.56 i made the decision to try those gears and converter combo cause its a small motor. The gearing seems fine cause it would probably come out at around 6900-7k rpm if it had'nt shifted to 4th. Unless i was planning on trapping more mph i would change it but we'll see maybe it will help our 60 with 4.56
i went 10.8 at my best trap speed of 127.8 locking the converter up, rpms across traps were 7250 roughly
you get that shift fixed then really watch her flythe truck is a 4l80e right? mines a 4l60e so yeah the rpms would be a tad lower for ya
09-09-2010, 07:22 PM
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i bet you would have trapped 128-129 at 7300 rpms
i went 10.8 at my best trap speed of 127.8 locking the converter up, rpms across traps were 7250 roughly you get that shift fixed then really watch her fly
the truck is a 4l80e right? mines a 4l60e so yeah the rpms would be a tad lower for ya
i went 10.8 at my best trap speed of 127.8 locking the converter up, rpms across traps were 7250 roughly
you get that shift fixed then really watch her flythe truck is a 4l80e right? mines a 4l60e so yeah the rpms would be a tad lower for ya
09-09-2010, 07:57 PM
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Fukn gettin it on that pass.That truck will come out harder with taller gears though.It gets out of first too fast imo.I have yet to see a purpose built nitrous car/truck whatever not run better geared down within reason.
09-09-2010, 11:00 PM
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this is awesome and congrats on the new milestone fellas!
either 4.56's or a taller tire should help. 1.52 60' ain't no slouch but judging by how it launches there is room for improvement. you can say 10.50's or lower.
either 4.56's or a taller tire should help. 1.52 60' ain't no slouch but judging by how it launches there is room for improvement. you can say 10.50's or lower.
