Lets make some guesses!!

[Fastbird]

Just throwing it out there incase you need more flow. I know people have had issues with the low rate of flow at highway speeds but now there are other options.

No, I gotcha there. My case is simply that it was fine before, and with all the extra heat and airflow blockage I found the limitation. Hoping these new fans clean it up this weekend.

[RealQuick]

Updates?

[Fastbird]

Haha, guess I could have updated this thread. had boost control issues again, wastegate wouldn't hold it and it kept dropping. We got it to hold 15 PSI after a quick spike to 19, made 694 RWHP on the mustang dyno again, so probably the 720-730 range on a dynojet. I'm extremely happy about the results given it's at only 15 psi. LT1's don't seem to break 700 very often at that level. But......I'm worried there may be a backpressure issue in the hotside now because to make the 15 psi, we have the boost controller maxed out and it wouldn't go higher than the 15.

[RealQuick]

Haha, guess I could have updated this thread. had boost control issues again, wastegate wouldn't hold it and it kept dropping. We got it to hold 15 PSI after a quick spike to 19, made 694 RWHP on the mustang dyno again, so probably the 720-730 range on a dynojet. I'm extremely happy about the results given it's at only 15 psi. LT1's don't seem to break 700 very often at that level. But......I'm worried there may be a backpressure issue in the hotside now because to make the 15 psi, we have the boost controller maxed out and it wouldn't go higher than the 15.

Sean,
Dont forget, a boost controller will only pull the pressure up twuce the rating of the spring in the gate. If you only are using the standard 7psi that comes with the gate, the the controller is gonna struggle past 14-15psi. You could put in a 10 psi spring, then the controller should pull u to 20psi.

[Fastbird]

Sean,
Dont forget, a boost controller will only pull the pressure up twuce the rating of the spring in the gate. If you only are using the standard 7psi that comes with the gate, the the controller is gonna struggle past 14-15psi. You could put in a 10 psi spring, then the controller should pull u to 20psi.

Hmmmmm......and the JGS only comes with a 7 lb spring. Makes sense....but then again.....with pressure to the top side....should be able to override the pressure. Or by giving full pressure top side and cutting down on pressure seen on the bottom side couldn't I override that double spring pressure rule? I was under the impression that's how it worked and the double the spring rule was only for either no signal to the wg or full signal to both wg ports.



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[shownomercy]

Get a Eboost with C02, all teh adjustments!

[RealQuick]

From my understanding, with the controller, double the spring pressure is about max.

[Lcvette]

that sounds like a weird problem.. what boost controller are you running right now? Whenever I am heading to the dyno I always bring a trusty hallman ball and spring backup controller, when all else fails you can run as much boost as you want over base spring with one of those regardless of what gate spring you have. I highly recommend to anyone traveling to dyno or even if you don't have to travel, just to keep from being aggrevated. you can grab them for around $100 bucks and they are ROCK SOLID reliable! What size turbine housing are you running on the 76GTS? guessing a .96 A/R? I saw some backpressure with mine but I think you should be able to hold at least 21-23psi through redline on that turbo unless you have some boost leaks or are turning it to 7500 or something wild? Have you done a boost leak test on it? I know on mine I had some issues and discovered quite a few small leaks that added up. I think there were 5 total and once I fixed all of them I gained 3 pounds and they were pretty small mind you.

[Fastbird]

I'm using a Joe P Inline boost controller. Kind of like a Hallman in it's design. I'm actually going to move up to a Hallman once I get the car back into a garage next month. Bump to a hallman and hard lines to clean things up.

It's not boost leaks, it's spiking and then trailing as the RPM's come up. I'm NOT going to move to CO2. Am going to try to find a heavier spring for the wastegate and go from there.