Has anyone used ls7 rods in a ls1 or ls6?
03-24-2012, 09:29 PM
#23
03-26-2012, 08:56 AM
#24
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Going to the dyno at 1pm today. I will let u guys know how it does and compare the old dyno curve to the new one. I might not get to the computer till late tonight though.
03-26-2012, 08:51 PM
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Bad news. On a mustang dyno my car made 10 less hp and tq. i used the same dyno last time with smaller cam, less compression and stock rods and pistons. Only made 360hp 320tq. Tuner said he thinks it my stock maf/bellow choking the motor. he said he could tell by watching the map sensor.(I dont think i will gain the 40 hp and tq i am missing) I think it might be my tranny since it bounced off the rev limiter last time i went to the track. thought it hit the rev because i used a smaller diametor tire but it could be the trans, (still ran 11.8 at 116). Either way Thurs or friday I am installing a slp maf and bellow. If that does not improve the numbers i will get the tranny fixed. At least my motor is not huffing on decell any more.
I am going to throw up now then go to bed.
I am going to throw up now then go to bed.
03-30-2012, 07:30 PM
#29
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Well found the problem. The car is not getting enough air. slp maf and slp smooth bellow layed down 25 hp and 34 more tq. My builder is now wondering if my intake is an ls6 intake because according to the map the car is still choking. Looks like a fast intake is next. Just glad i found the problem. here is the dyno graphs. One best run and one overlay with last weeks dyno before the slp maf and bellow. With the lighter rotating assembley the car is very responsive. this was done on a mustang dyno.
[IMG]http://i66.photobucket.com/albums/h244/darooke/th_ls7rodsbuild
003.jpg[/IMG]
[IMG]http://i66.photobucket.com/albums/h244/darooke/th_ls7rodsbuild
003.jpg[/IMG]
Last edited by darooke; 04-01-2012 at 04:06 PM.
08-02-2013, 01:44 PM
#33
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I too like th idea of using the LS7 rods in a build. Heck, a few months back, there was a set for sale on CL in Houston for $350! I probably should've picked them up. Thing is watching the C6Z section of the vette forum, there have been some LS7 rod issues as well as the known exhaust valve issues with the LS7. Still, this would make for a cool setup if you could pick up some rods for a decent price as long as when manga fluxed they tested out good. I wouldn't think the balancing would be any more than that of a typical assembly. It would be cool how fast this motor would spin up!
08-02-2013, 01:46 PM
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Diet coke, as far as taking power, the LS7 rods have lived with substantial power thrown at them. Heck, every H/C C6Z has 540-600 NA, and when squeezed can take more than 700.
08-02-2013, 01:56 PM
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I'd really be cool if GM performance would give us the LS7 crank w/o the long snout for the dry sump. There would be LS7 cranked wet sump 383's,402's,416's, and 427's everywhere!
08-02-2013, 08:12 PM
#39
Right, but you're going to have to a run a custom piston with that specific type of wrist pin design, and rebalance a crank made for steel rods, both of which add $. I'm not saying they arent a valid option, what I"m trying to say is they aren't budget friendly
08-02-2013, 08:16 PM
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I wonder if the OP could get on here and give an update on the setup? I'd love to see this thing spin past 7500!