Home
What's new
Latest activity
Authors
Store
Latest reviews
Search products
Forums
New posts
Search forums
What's new
New posts
New listings
New products
New profile posts
Latest activity
Members
Current visitors
New profile posts
Search profile posts
Log in
Register
Cart
Cart
Loading…
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Search titles only
By:
Menu
Log in
Register
Navigation
Install the app
Install
More options
Change style
Contact us
Close Menu
Forums
Cobra Forums
The Terminator
Engine/Tuning
What IAT2 to start pulling timing? TVS with 2.8", 93 plus booster.
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="TheFleshRocket" data-source="post: 15755218" data-attributes="member: 48535"><p>Have a look at these posts (and read the whole thread): </p><p><a href="https://www.svtperformance.com/forums/threads/high-boost-tvs-guys-in-here-please.1147499/page-6#post-15720392" target="_blank">High boost TVS guys in here please</a></p><p><a href="https://www.svtperformance.com/forums/threads/high-boost-tvs-guys-in-here-please.1147499/page-7#post-15726244" target="_blank">High boost TVS guys in here please</a></p><p></p><p>It's been shown that the IAT2 sensor mount on the TVS blower keeps the sensor too far out of the airstream, and that heatsoak causes the sensor to read inaccurately high. Additionally, IAT2 readings climb inaccurately quickly during pulls. The OP (well heck, it's Soap and he's in THIS thread!) milled down the IAT2 mounting location on the TVS so that the sensor sat better in the airflow and noticed lower IAT2s and less IAT2 climb during pulls.</p><p></p><p>If, for example, the IAT2 reading in fourth gear really was 140F, it might make sense to be pulling timing at that point. But if the IAT2 sensor was reading high due to its insufficient depth into the airstream, then the tune should be reconfigured to not pull timing until a higher temperature to compensate. </p><p></p><p>To answer your question, no I have not pulled the plugs. There has been no audible hint of detonation (I realize that doesn't mean that it doesn't exist), but given that my car's timing (16.5 degrees, 2.8 pulley, ~96 octane) is more-conservative than what many others have posted (17-18 degrees, 2.8 pulley, 93 octane, seems to be pretty common), I don't have reason to think that there is any detonation.</p><p></p><p>I do plan to get a better heat exchanger, but I am also suspicious that it won't help the IAT2 readings much if the sensor is already reading inaccurately. </p><p></p><p>I am not "trying to squeeze every little horsepower", but I am trying to get it close to 600rwhp, when right now, seat of the pants says it's probably around 560-570 before it starts pulling timing, and 520-530 once timing is being pulled. </p><p></p><p>I closely monitor my engine parameters at all times, and especially after loading an updated tune. I am confident that my tuner would not inadvertently make a dangerous change, and I'm also confident that I'd discover it before anything bad happened. And if I did hurt the motor, I know it's on me and nobody else. </p><p></p><p>At this point, it's been long enough since I've done the blower swap that I am almost considering pulling it to have the IAT2 sensor mount milled down. Either that, or just telling my tuner to make the tune not start pulling timing until 150F and then listening and checking the plugs for signs of detonation (since I can't seem to get any sort of straight answer).</p></blockquote><p></p>
[QUOTE="TheFleshRocket, post: 15755218, member: 48535"] Have a look at these posts (and read the whole thread): [URL='https://www.svtperformance.com/forums/threads/high-boost-tvs-guys-in-here-please.1147499/page-6#post-15720392']High boost TVS guys in here please[/URL] [URL='https://www.svtperformance.com/forums/threads/high-boost-tvs-guys-in-here-please.1147499/page-7#post-15726244']High boost TVS guys in here please[/URL] It's been shown that the IAT2 sensor mount on the TVS blower keeps the sensor too far out of the airstream, and that heatsoak causes the sensor to read inaccurately high. Additionally, IAT2 readings climb inaccurately quickly during pulls. The OP (well heck, it's Soap and he's in THIS thread!) milled down the IAT2 mounting location on the TVS so that the sensor sat better in the airflow and noticed lower IAT2s and less IAT2 climb during pulls. If, for example, the IAT2 reading in fourth gear really was 140F, it might make sense to be pulling timing at that point. But if the IAT2 sensor was reading high due to its insufficient depth into the airstream, then the tune should be reconfigured to not pull timing until a higher temperature to compensate. To answer your question, no I have not pulled the plugs. There has been no audible hint of detonation (I realize that doesn't mean that it doesn't exist), but given that my car's timing (16.5 degrees, 2.8 pulley, ~96 octane) is more-conservative than what many others have posted (17-18 degrees, 2.8 pulley, 93 octane, seems to be pretty common), I don't have reason to think that there is any detonation. I do plan to get a better heat exchanger, but I am also suspicious that it won't help the IAT2 readings much if the sensor is already reading inaccurately. I am not "trying to squeeze every little horsepower", but I am trying to get it close to 600rwhp, when right now, seat of the pants says it's probably around 560-570 before it starts pulling timing, and 520-530 once timing is being pulled. I closely monitor my engine parameters at all times, and especially after loading an updated tune. I am confident that my tuner would not inadvertently make a dangerous change, and I'm also confident that I'd discover it before anything bad happened. And if I did hurt the motor, I know it's on me and nobody else. At this point, it's been long enough since I've done the blower swap that I am almost considering pulling it to have the IAT2 sensor mount milled down. Either that, or just telling my tuner to make the tune not start pulling timing until 150F and then listening and checking the plugs for signs of detonation (since I can't seem to get any sort of straight answer). [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Cobra Forums
The Terminator
Engine/Tuning
What IAT2 to start pulling timing? TVS with 2.8", 93 plus booster.
Top