tial 60mm gate issues
Tial rated their 60mm waste gate springs wrong. A 5 lb spring might see around 10 psi +/- a couple lbs. A 10lb spring will be closer to 20psi. I'm not saying your gate location couldn't be a part of the problem. NLR is correct on his theory. Every setup works differently. On a very efficient setup with low back pressure; without the waste gate venting both banks of cylinders with direct flow, it WILL NOT regulate boost properly. So i would lean toward it being the gate more then anything. I have had the same issue with every Tial 60 i have installed.
When i had what Tial called their 15lb spring setup.(Big light blue spring along with small dark blue spring. I saw almost 30psi.
When i had what Tial called their 15lb spring setup.(Big light blue spring along with small dark blue spring. I saw almost 30psi.
Its actually only about 6psi of boost but I'm at high elevation. Those are MAP sensor readings, not boost sensors... 
Staging Lane
Joined: Sep 2008
Posts: 99
Likes: 0
From: MI
you forgot to mention that it was absolute then...
Staging Lane
Joined: Sep 2008
Posts: 99
Likes: 0
From: MI
yupp had to drop down in spring. its not so violent now lol. nice to finally see the guage stay put and not have to worry about overboosting. finally heard the open wastegate and thats loud also.
now i can finally start doing some logs... thanks everyone!!!!!!!! later on ill get boost controller working
now i can finally start doing some logs... thanks everyone!!!!!!!! later on ill get boost controller working
my charge side is PT88 that uses 3" to the 24x12x4 core then steps up to 4" and into the 90mm TB
also using a Tial 50mm bov
Last edited by 7845; Sep 25, 2008 at 03:50 PM.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
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
Staging Lane
Joined: Sep 2008
Posts: 99
Likes: 0
From: MI
no backpressure gauge. now where would that be measured? my setup is a mirror image of Kbracing's kits. just my wastegate is on driverside instead of passengerside. i have gate vented to atmoshpere. i have 4" exhaust that is roughly 5' long. no muffler and tubing is basically straight exits in front of right rear.
my charge side is PT88 that uses 3" to the 24x12x4 core then steps up to 4" and into the 90mm TB
also using a Tial 50mm wastegate
my charge side is PT88 that uses 3" to the 24x12x4 core then steps up to 4" and into the 90mm TB
also using a Tial 50mm wastegate
where is the boost reference line taken from? (for the wastegate)
and where is the boost gauge source taken from?
my wastegate is off the snail. i had to my boost controller but bypassed it to rule out that issue
boost gauge is referenced off the back of intake on the little nipple that is usually for the heatercontrols
Staging Lane
Joined: Sep 2008
Posts: 99
Likes: 0
From: MI
as you go up in spring pressure the actual boost number would get higher and higher because of the increased velocity
Intercooled, and manifold referenced. It works the same way in Phoenix too. I guess since it works like it's supposed to then it must just be wrong cuz you say so?
Last edited by kbracing96; Sep 25, 2008 at 04:30 PM.
My tial gates have small red springs and they are rated for 4.4psi. Running on gate alone they my boost pressures are 4.5-4.6 all the time. Close enough if you ask me. I have many logs showing it.