I regret it. Lol

 

So, Ratty, refresh my memory and tell me what your target, or desired peak boost level is?

At any rate, we bottomed the tirnbuckle out so we are gonna have to cut 3-4 threads iff the tip of the actuator rod to recoup some positive adjustability out if your actuator. 16# is just too low unless you want to only run 19# of peak pressure.

So, it creeps on up from 16# to 19#, right? So if you cut 3-4 threads(3/8") off the end that oughta allow you to adjust preload up to 19# and if you factor in the three pounds of creep that will put peak boost up around 21. Is that gonna be enough? Are you running a MBC to dial in the last couple pounds of boost above 19#. Or, will you be wanting to run higher than 21#?

 

Ratty: at what engine speed(RPM) is your HTA 71 hitting that 16# of WG spring pressure?

 

I like to run 26-28 on 93 peak my lap top is down now so I'm sol. Hallman for sure. I'll def be preloading more. Waiting for my anti lag set up to work...

34-3500 is 16 psi and 30 by 3800 ish.

Need to fix my laptop ASAP

 

i know u might not get 400hp level with hta71 on 91 pump cuz this gas is really shiety and hard on the tuner... my buddy has the hta73 green with ported head, ported intake mani, and ported tb on 272 kelford cams and was able to pull out 375hp on 91 pump.... but on e85 he was able to get 465hp from it with a conservative tune..... id say go with e85 on the hta71 and u shuld make over 400 with no problem

 

Yeah, you'll probably find that 22# of spring pressure will spool it up a bit quicker and after 22# you can adust the boost the rest of the way up with your MBC. 16# by 3500 is a little lazy. You will probably like 16# by 3000 much better. So, you may have to cut the actuator rod by a total of 1/4"(about 5 threads).

 

OP: Do you know when that new turbo is supposed to arrive?

 

It should be arriving at FP this week. They told me 1 week after received they will ship it out. So I'm guessing 10/29 - 11/2. I will order the MAP 25 psi WGA per your recommendation (I have store credit from MAP). Thanks.

 

I am wondering whether anyone has tried running the HTA71 with the quicker spooling 9.8cm turbine housing off their VIII turbo instead of the laggier 10.5cm housing that FP fits the turbo with as standard? Configured in this manner it should spool about 200-400 RPM sooner irrespective of what actuator is fitted.

Granted, there would be the predictable tradeoff of about 10 WHP in the topend power. But, depending on the user's partcular driving application(i.e., Auto-X, canyon carving, etc.) and whether it requires quicker spool, this might be an option worth considering.

Of course this would be easy enough to try and if you have your old VIII 9.8 housing laying around it wouldn't cost anything either. It would be a straight bolt-on swap as both the HTA 71 and the stock IX/VIII turbos are fitted with the same TD05H turbine wheel.

Just a thought!

 

Well, I hope that it arrives early as I'll be up in your area for a couple of days and I can drop by and help you set the preload on the thing. If it hasn't arrived by then...then we can set preload on your current VIII turbo setup. This way you'll be up to speed on the proceedure when your new turbo arrives...even if by then I am back down here in the jungle. JeJeJe

 

I'd love to try a9.8. The hks unit uses a 9.8 if I'm not mistaken

 

Ratster: I figured that you just might! LOL

 

Look. Why not just order the turbo from FP already fitted with their optional HD 25# actuator? Just a thought although I am sure that the MAP actuator is a fine piece as well. Either way you should be fine!

 

^FP upped the IWG price to 229 for some reason, so the map unit is cheaper by $100, and the turbosmart unit with a bunch of different springs is only $180

 

Prices are sure enough BIG in Texas. Wow, for $229 I can get a Club Level seat in the shade to see the Giants vs Cards at AT&T Park..plus a Polish dog and a Draught!