LE2 242/248 110lsa
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basically the same grind that is going in my new motor...
http://www.youtube.com/watch?v=5wqNSdB1BG8
here's another example
http://www.youtube.com/watch?v=5wqNSdB1BG8
here's another example
back in '04 I built an LE3 383 and the cam I got was a 242°/248° on a 108lsa specced by bret bauer. it wasnt on any modern lobe, if I recall correctly it was on comp magnum lobes, I have the comp lobe numbers on my computer but I dont feel like looking them up in the catalog. they were 3113/3170. the .006" duration was huge, 304°/315°. cam had 29° of valve overlap at .050". wouldnt idle below 1,000 rpm. my vacuum was around 6"-7" so the brakes worked like ****. I have a video clip but its very poor quality from 7-8 years ago.
http://youtu.be/1n4b7gTo_nE
that engine never ran right, couldnt ever figure it out.
later on I built a 350 with a 242/248 112lsa cam that was "too big, wouldnt idle, would want to rev too high" etc etc etc but was on modern lobes (3018/3377) with a bit more aggressive ramp rate than the ole LE3 383 cam I had. it idled at 1000 rpm happily, the brakes worked fine, it ran like a raped ape. put down 390 whp through touched up stock heads... then the basically stock bottom end grenaded before I ever got to run it at the track.
here is what that one sounded like:
LTs in to open Y-pipe
http://youtu.be/s7puQmREcBw
then with hooker catback
dyno: http://youtu.be/14bLVIZmq-k
burnout: http://youtu.be/qQdbms3CYVk
I miss that car
http://youtu.be/1n4b7gTo_nE
that engine never ran right, couldnt ever figure it out.
later on I built a 350 with a 242/248 112lsa cam that was "too big, wouldnt idle, would want to rev too high" etc etc etc but was on modern lobes (3018/3377) with a bit more aggressive ramp rate than the ole LE3 383 cam I had. it idled at 1000 rpm happily, the brakes worked fine, it ran like a raped ape. put down 390 whp through touched up stock heads... then the basically stock bottom end grenaded before I ever got to run it at the track.
here is what that one sounded like:
LTs in to open Y-pipe
http://youtu.be/s7puQmREcBw
then with hooker catback
dyno: http://youtu.be/14bLVIZmq-k
burnout: http://youtu.be/qQdbms3CYVk
I miss that car
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wouldn't idle below 1000? lol i have a 267/272 @ .050" on a 110 that idles at 950 RELIABLY at 4.5" of vacuum. 242/248 on a 110 will idle at 800-900 with 7-8" of vacuum in a 383. here's a 240/252 on a 107... only have a one at 1050 rpm, this was early in the tuning process. Spend time or money on a well sorted tune and it will drive without surge (well maybe not after cold start) 
http://www.streetfire.net/video/wick...lip_720281.htm
http://www.streetfire.net/video/wick...lip_720281.htm
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, mine is on a m6 . make sure you post number and clip. i wont have mine ready till ending of this month or sometime in april. 
Fashooter I would be very happy with low 11's as that is my original goal. What Pistons are you running and who did your tune? I really want to get a Dyno tune but not sure of anyone in Texas that is reputable with LT1's. Any Ideas? I should have the car up and going by the end of the month also. As soon as I take it to the track I will post Track times good or bad. I know my 60ft is going to suffer with the M6 and stock 10bolt though.
Last edited by lt1_2buku; Mar 12, 2012 at 02:11 PM.
Car weighs #3680 best 60ft 1.54. I was hoping for a bigger number for hp but it is what it is! I would think 460 would be a pretty big number for stalled auto? This was on a mustang dyno, Don't know if that made a difference and thru a full exhaust. Have went to stepped headers and added a cut out going back soon, to see what it does
Fashooter I would be very happy with low 11's as that is my original goal. What Pistons are you running and who did your tune? I really want to get a Dyno tune but not sure of anyone in Texas that is reputable with LT1's. Any Ideas? I should have the car up and going by the end of the month also. As soon as I take it to the track I will post Track times good or bad. I know my 60ft is going to suffer with the M6 and stock 10bolt though.
wouldn't idle below 1000? lol i have a 267/272 @ .050" on a 110 that idles at 950 RELIABLY at 4.5" of vacuum. 242/248 on a 110 will idle at 800-900 with 7-8" of vacuum in a 383. here's a 240/252 on a 107... only have a one at 1050 rpm, this was early in the tuning process. Spend time or money on a well sorted tune and it will drive without surge (well maybe not after cold start)
http://www.streetfire.net/video/wick...lip_720281.htm
http://www.streetfire.net/video/wick...lip_720281.htm
later on I built a far more budget engine, which was too budget obviously when the basically stock bottom end grenaded, that had a 242/250 112 (my first post was a mistake its wasnt a 242/248) and idled fine at 1000 rpm in a 350, easily could have been dropped a bit. only had a mail order tune on it also, didnt last long enough to bring to a dyno to tune it. it actually drove better with 2.73s than 4.10s. it was like a damn powerglide with the 2.73s lol 1st gear went over 60, 2nd gear went to about 120 mph at 7k rpm.
I want to build one again
wouldn't idle below 1000? lol i have a 267/272 @ .050" on a 110 that idles at 950 RELIABLY at 4.5" of vacuum. 242/248 on a 110 will idle at 800-900 with 7-8" of vacuum in a 383. here's a 240/252 on a 107... only have a one at 1050 rpm, this was early in the tuning process. Spend time or money on a well sorted tune and it will drive without surge (well maybe not after cold start)
http://www.streetfire.net/video/wick...lip_720281.htm
http://www.streetfire.net/video/wick...lip_720281.htm
Here is a clip of mine before I sold it, cam is a little different 242/250 109LSA. It was a custom grind by Joe Overton.
www.youtube.com/watch?v=oCIjrw-DfqU
www.youtube.com/watch?v=oCIjrw-DfqU