Ok so I'm currently making 447whp (dynojet) with an FP red, an aquamist HFS-6, cosworth 272's ported everything else, etc.

It's taking 33psi to make this hp and it refuses to make any more boost. Any ideas?

1. Edit Good point Erik, i need to stop worrying about that.

2. The car is running a stock wastegate, can this be diverting air (i.e. boost leak) and making the turbo run super inefficient at this psi, thus robbing power? In other words, could i install a forge waste gate and expect to make a lot more hp with the same psi?

3. What's the best wastegate to buy for this setup? I'd research it myself but I'm sick and tried lol.


Thanks

 

Anything is possible, but the Reese Tuning Time Attack car makes 600+whp on a Mustang Dyno with our cat, so it shouldn't be preventing you from moving beyond 447 whp on a DJ.

When's the last time you checked for boost leaks?

 

Yeah, i highly highly doubt it's the cat. (on a side note, going from gsc s1's to cosworth 272's and from a helix to a milspec cat gave me 15whp mid range and 15peak tq. with out any boost changes and on a car that's already having problems ) But once I get this straightened out, I'll post all my results.

(that cat core should have went out yesterday from my bro. I'll get tracking number in am )

As for the boost leak test, not recently enough. One will be done this weekend. But 33psi and not climbing sound's like a boost leak huh?

 

Only way to find out..perform a boost leak test.

Upgrading the wastegate may be a great idea, there is an 18 psi and 25 psi actuator available from FP.

 

Thanks. wg's aren't something I've researched. What size (mm) should i run? Do i even have an option considering it's internal? And 25psi actuator doesn't equate to 25psi peak boost right? Thanks

 

No that's not peak boost

 

you should have 500whp easy, check, check, check everything.

i have 490whp at 33psi meth and red
gl

 

Carloverx: What device are you using to control boost? Is it an MBC? If so, you may have reached the limit of adjustment for your particular MBC. They have a certain PSI working range above the WGA's base pressure. So, you could try adjusting (increasing) WG spring pressure first.

Let's say that your turbo is running a base pressure of 12 PSI. So, if your MBC adjusts boost up to 32 PSI, that would mean that your MBC has a 20 PSI effective working range.

Try increasing wastegate spring pressure up to 22-24 PSI on your stock WGA. Then your MBC could raise boost 20 PSI above that. Maybe this will work. Otherwise, if it was me I might just go for the Forced Performance 25 PSI actuator since you are running over 30# anyway.

 

My stock wastegate is maxed right now.

Even if I did replace the wg and it helped my ("hallman??") mbc, wouldn't that just allow me to run more boost?

Like the poster above said (which I can't read right now bc I'm on my phone posting this), he's making 40hp more with the same psi..?

I guess I need to do a boost leak test first and if it checks out, then I need a new wastegate. Also, when we crushed the stock wastegate, I went from the 31psi to 33, so I guess it's probably that?

 

You will def see gains going from the mil-spec cat to a test pipe but that wouldn't be anything huge.I would def look for boost leaks and into the wg.

 

Theres also another factor to consider. Your TUNE plays a VERY large factor seeing as how numbers seem to be important to you. The wastegate MAY be the culprit, but there can still be more to it than just that.

 

I have hit 37 and 35psi a few time with the stock 19psi wastegate acutator. My turbo is unported. I would look for boost leaks. What type of bov are you running. I could not make 32 with my stock plastc bdv(bov)

 

Joe, I been looking for a bunch of stuff to try to solve your problem and here I finally made it to your thread, good luck buddy, txt me later- maybe after work I can swing by and take a look at things with you.

 

I posted above, but wanted to follow up with other suggestions..

What kind of boost controller are you using and who is doing the tuning? Possibly try adjusting the spring on the oem actuator. Remove the wastegate actuator, a pin and two screws, and then turn the nut on the end to increase/decrease spring load, however, I forget which direction does what.

People with FP Greens often upgrade the wastegate and make 400+awhp.

 

Also, where are you in NJ...because there are numerous tuning shops in norther NJ that I know of..I highly recommend IveyTune, and there also is turbotrix.

Call IveyTune and explain your situation, they will steer you in right direction.