Too much back pressure?
Thread Starter
Staging Lane
Joined: Jan 2016
Posts: 56
Likes: 14
If you have an aftermarket ECU a 0-100psi transducer is $16 on Amazon. Def worth the $. Either way, as seen guys are making silly power... regardless of back pressure readings.
Also fwiw here are the numbers at lower boost levels.
727/882 @ 22
624/796 @ 20
630/737 @ 17
573/674 @ 14
Also fwiw here are the numbers at lower boost levels.
727/882 @ 22
624/796 @ 20
630/737 @ 17
573/674 @ 14
If you have an aftermarket ECU a 0-100psi transducer is $16 on Amazon. Def worth the $. Either way, as seen guys are making silly power... regardless of back pressure readings.
Also fwiw here are the numbers at lower boost levels.
727/882 @ 22
624/796 @ 20
630/737 @ 17
573/674 @ 14
Also fwiw here are the numbers at lower boost levels.
727/882 @ 22
624/796 @ 20
630/737 @ 17
573/674 @ 14
At that time, those cast baby GT3582's were $109 shipped! Pretty great value for turbos capable of 500+ crank each. The T4 versions do better on power, but the response isn't there.
I always wanted to do 3 of them just to be different. Cheapest set ive seen these days is $129 shipped.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thread Starter
Staging Lane
Joined: Jan 2016
Posts: 56
Likes: 14
While I was swapping the housings I went to rebuild them. Apparently these steel thrust bearings aren’t the best idea. So it’s an upgrade to go copper.
That was kind of my point, those little bad boys should be putting out some power! Should be MUCH more efficient than the baby GT3582 china clones. I'd check your cranking compression. Ensure plugs are gapped way down at .015 or less and see if makes a difference. Something seems "off". I don't think it's a bad thing you went larger on the housings. Hope it solves your issues. Just bacuase china says .063 T3 def doesn't mean it specs out to that. While I'd assume precisions are accurate in sizing.
Thread Starter
Staging Lane
Joined: Jan 2016
Posts: 56
Likes: 14
That was kind of my point, those little bad boys should be putting out some power! Should be MUCH more efficient than the baby GT3582 china clones. I'd check your cranking compression. Ensure plugs are gapped way down at .015 or less and see if makes a difference. Something seems "off". I don't think it's a bad thing you went larger on the housings. Hope it solves your issues. Just bacuase china says .063 T3 def doesn't mean it specs out to that. While I'd assume precisions are accurate in sizing.
I hope it’s just the housings lol. But it could be something else. I’m running BR7ES factory gap at .024
Staging Lane
Joined: May 2021
Posts: 97
Likes: 11
Very impressive gains! That is fantastic. That is one really impressive car.
You know, looking at the torque rise in your dyno plot with the old turbine housing, it looks like you gave up very little on spool response. After driving it around off the dyno, how does it feel on transient response compared to the old housing?
You know, looking at the torque rise in your dyno plot with the old turbine housing, it looks like you gave up very little on spool response. After driving it around off the dyno, how does it feel on transient response compared to the old housing?
Thread Starter
Staging Lane
Joined: Jan 2016
Posts: 56
Likes: 14
Very impressive gains! That is fantastic. That is one really impressive car.
You know, looking at the torque rise in your dyno plot with the old turbine housing, it looks like you gave up very little on spool response. After driving it around off the dyno, how does it feel on transient response compared to the old housing?
You know, looking at the torque rise in your dyno plot with the old turbine housing, it looks like you gave up very little on spool response. After driving it around off the dyno, how does it feel on transient response compared to the old housing?
Staging Lane
Joined: May 2021
Posts: 97
Likes: 11
FWIW - I have a Ford 8.8 in my LS1 Miata. It uses a Ford Explorer aluminum IRS housing, and an Allison Truetrac differential, with a 3.55 R&P. The Truetrac is a very worthy differential for street or track. People even drag race with them. I am very happy with mine.
The limited slip Getrags are another good option. A friend of mine has one in his dedicated road race LS Miata, and does well with it on the track.
The limited slip Getrags are another good option. A friend of mine has one in his dedicated road race LS Miata, and does well with it on the track.
Thread Starter
Staging Lane
Joined: Jan 2016
Posts: 56
Likes: 14
FWIW - I have a Ford 8.8 in my LS1 Miata. It uses a Ford Explorer aluminum IRS housing, and an Allison Truetrac differential, with a 3.55 R&P. The Truetrac is a very worthy differential for street or track. People even drag race with them. I am very happy with mine.
The limited slip Getrags are another good option. A friend of mine has one in his dedicated road race LS Miata, and does well with it on the track.
The limited slip Getrags are another good option. A friend of mine has one in his dedicated road race LS Miata, and does well with it on the track.
TECH Regular
Joined: Jul 2019
Posts: 460
Likes: 44
Why does boost / tq seem so laggy? Not hating on you or car!
I had a tune that looked like this before and turned out the timing was super low on the bottom end going up to like 4psi. Got it retuned by someone else and he said need low end timing to get turbos going. Car is 600+ tq by 4000rpm now. Night and day. Same setup but diff tuners.
I had a tune that looked like this before and turned out the timing was super low on the bottom end going up to like 4psi. Got it retuned by someone else and he said need low end timing to get turbos going. Car is 600+ tq by 4000rpm now. Night and day. Same setup but diff tuners.
Thread Starter
Staging Lane
Joined: Jan 2016
Posts: 56
Likes: 14
Why does boost / tq seem so laggy? Not hating on you or car!
I had a tune that looked like this before and turned out the timing was super low on the bottom end going up to like 4psi. Got it retuned by someone else and he said need low end timing to get turbos going. Car is 600+ tq by 4000rpm now. Night and day. Same setup but diff tuners.
I had a tune that looked like this before and turned out the timing was super low on the bottom end going up to like 4psi. Got it retuned by someone else and he said need low end timing to get turbos going. Car is 600+ tq by 4000rpm now. Night and day. Same setup but diff tuners.
I’ll take a look.