ebay t72 or on3 t70 for twin 4.8
10-25-2016, 05:41 PM
#1
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ebay t72 or on3 t70 for twin 4.8 im selling my t4 gt35 61/62s.
full size 02 rcsb awd ~3600 stall
4.8, stock ported heads, tu0 cam
i want to make enough power to kill that floating rod 4.8. also i daily drive it sometimes.
which turbos should i buy?
http://www.ebay.com/itm/Rev9-TX-72-6...RVtqBn&vxp=mtr
http://www.ebay.com/itm/On-3-Perform...RYCUrD&vxp=mtr
full size 02 rcsb awd ~3600 stall
4.8, stock ported heads, tu0 cam
i want to make enough power to kill that floating rod 4.8. also i daily drive it sometimes.
which turbos should i buy?
http://www.ebay.com/itm/Rev9-TX-72-6...RVtqBn&vxp=mtr
http://www.ebay.com/itm/On-3-Perform...RYCUrD&vxp=mtr
10-28-2016, 01:26 PM
#4
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ive been driving it around the last year on the stock trans and converter, the 4l80, np149 and loose converter is ready to go in, just need a free couple weeks to install. it hauls *** for what it is with all the stock drivetrain in 4hi. its going to be even better when i can get the 'racey' drivetrain under it.
the only reason im selling the turbos is my goals have sorta changed (truck doesnt need to be as reliable anymore) and my friends wants the 61/62s so its a target of opportunity.
I almost went with the 70s because its a 4.8. what would make the larger turbos that much better? its hard to find many twin 4.8 info out there.
the 61/62s are coming off tonight and im planning to order the replacements tomorrow.
the only reason im selling the turbos is my goals have sorta changed (truck doesnt need to be as reliable anymore) and my friends wants the 61/62s so its a target of opportunity.
I almost went with the 70s because its a 4.8. what would make the larger turbos that much better? its hard to find many twin 4.8 info out there.
the 61/62s are coming off tonight and im planning to order the replacements tomorrow.
10-28-2016, 01:51 PM
#5
Either would work fine I'm sure. I'm a fan of the larger exhaust wheels is all. Also the comp wheels appear to be copies of a newer design than the on3's.
I bought 2 72/68's myself going on a 5.3 (originally was a 4.8 but an LC9 fell into my lap too cheap to let go.) went with the T3 .84's though.
https://ls1tech.com/forums/forced-in...-ls-notch.html
I wouldn't suggest the T3's. Their housings are huge. I'd do .63 T4's if I had it to do over.
I bought 2 72/68's myself going on a 5.3 (originally was a 4.8 but an LC9 fell into my lap too cheap to let go.) went with the T3 .84's though.
https://ls1tech.com/forums/forced-in...-ls-notch.html
I wouldn't suggest the T3's. Their housings are huge. I'd do .63 T4's if I had it to do over.
10-28-2016, 04:46 PM
#7
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10-29-2016, 12:15 AM
#8
Im thinking of using the cxracing gt35 twins on lq4. I saw denmah stuff but couldnt find a dyno graph.
mostly street use and on my old setup a single 76mm on a 5.3 lag a bit more than i like. so i figured ill go on the opposite end this time around and size them small.
that or maybe a 67mm twin
10-30-2016, 03:01 PM
#9
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i ended up ordering the 72/68s because i got them about $75 less than the on3 70s.
power goals are 'all of it'
its a full size awd silverado that i drive around a lot and use it as a real truck for hauling crap and things like that, but am not afraid to kill it. i want to see how far i can push it.
the t4 gt35s i think would be too small for a 6.0. denmah had choking issues with his. the exhaust wheels are tiny at 62mm and the housings are like 0.68. from what ive seen around, they max out on a 5.3 at about 18psi and 800ish whp. on a 4.8 they probably can go further. the guy in the thread mentioned a couple posts up is running them at 26psi on a 4.8.
power goals are 'all of it'
its a full size awd silverado that i drive around a lot and use it as a real truck for hauling crap and things like that, but am not afraid to kill it. i want to see how far i can push it.
the t4 gt35s i think would be too small for a 6.0. denmah had choking issues with his. the exhaust wheels are tiny at 62mm and the housings are like 0.68. from what ive seen around, they max out on a 5.3 at about 18psi and 800ish whp. on a 4.8 they probably can go further. the guy in the thread mentioned a couple posts up is running them at 26psi on a 4.8.
10-30-2016, 04:33 PM
#10
whats done to the short block?
since you haul stuff wouldnt the smaller turbo be a better fit? i would think all that torque would be handy and still have the upper end power.
not sure if you looked that guy up but check his power and torque curve looks great. 18psi 720whp 638trq. seems like a beast of a street setup
yea i saw denmah stuff. no reply about the actual dyno graph from him though. I wanted to see how much of a drop it really is and more importantly how big of a powerband it has. I was also wondering if a different cam would have help his setup better, intead of running out of steam sooner.
I remember on my old setup with stock cam it was also falling on its face in the upper rpm.
mine is strictly street car, probably wont go over 700whp since it weight less than 3k lbs. so i think it will do exactly what i want. all the power down low. I prefer a bigger powerband than peak though so
since you haul stuff wouldnt the smaller turbo be a better fit? i would think all that torque would be handy and still have the upper end power.
not sure if you looked that guy up but check his power and torque curve looks great. 18psi 720whp 638trq. seems like a beast of a street setup
yea i saw denmah stuff. no reply about the actual dyno graph from him though. I wanted to see how much of a drop it really is and more importantly how big of a powerband it has. I was also wondering if a different cam would have help his setup better, intead of running out of steam sooner.
I remember on my old setup with stock cam it was also falling on its face in the upper rpm.
mine is strictly street car, probably wont go over 700whp since it weight less than 3k lbs. so i think it will do exactly what i want. all the power down low. I prefer a bigger powerband than peak though so
10-31-2016, 07:21 PM
#11
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i remember him mentioning it had a big cam but i dont think he ever posted specs of it.
my short block is stock.
hauling stuff doesnt really need boost for the torque
my short block is stock.
hauling stuff doesnt really need boost for the torque
11-01-2016, 04:07 PM
#12
really? i was thinking if you load your truck it would be heavier so you need to put more throttle to move. Smaller turbo would put you in partial boost vs just n/a power.
BUT i dont haul anything so was just guesing.