Well I am going with the BB fp red cause thats what fits my setup. Should i still go with the 25psi actuator?

 

Bump

 

The 25# actuator is good. It gives you room to grow in case you should ever desire to run higher boost levels(over 28#) without the need to modify(cut) the length of the actuator rod.

The 18# WGA you can get to work over 26-28#, but you would have to dick with it using the "surgical", hacksaw method. I have never read of anyone having to cut the actuator rod on a 25# WGA. So, you should be set to go as is...right out of the box.

 

I talked to FP today and the owner/founder said to go with the 18psi cause he said that tuning it would be hard to start out at 25 psi. But what you say makes sense as well. Idk

 

25 or bust! Worst case if you need low low boost you back it off a lot, spool will suffer some, but ya know, give/take.

BTW Sparky I still haven't heard back from FP about cutting a 9.8 lol

 

Im gonna go with an 18# so my tuner can tweak it to bring the TQ down so im not blowing up my engine considering my block is a stock 2.0

 

Even at 25 psi you won't be able to make enough torque to overstretch the stock engine. Do the 25psi, trust us.

 

But I will be running more than 25psi. Sorry but you say "trust us" But i heard this straight from FP and a guy that has built over 10 evos and his evo has 633whp and he runs a
18# on it. I know every setup is different but the reasons are there.

 

I'd go for the 18 psi actuator with pump gas. If you have to run the 25 psi loose, you'll end up with a hump shaped boost curve, which is bad for power. As far as turbo size, I went from JB red to JB black and I thought the Black was significantly softer in transient response. I should have just kept the Red. Ultimately, I sold the Black for a BBK and the car has much better power across the whole rev range, even if the top end is less. I haven't dynoed the BBK, but the Red made 440-something on a Mustang dyno on 93 octane. The Black made 500 whp on VD, but it was much laggier than the BBK now. Just depends on how much racing you are going to do at high speeds. The big turbos are great at triple digits but the smaller ones are faster below the speed limit.

 

I am in total agreement with the above statement. I too would choose the 18# WGA, cut & preloaded for a 25-27 PSI peak, over an unpreloaded 25 pounder. The unpreloaded 25 pounder is going to start to move earlier and kill spool.

 

Now I think that perhaps Robert prefers you to run the 18 pounder for an entirely different reason. If you run the 18 pounder unpreloaded then it will vent earlier than an unpreloaded 25 pounder. This keeps turbocharger shaft speeds down. Turbo manufacturers simply hate excessively high shaft speeds because higher shaft speeds increase the likelihood of turbocharger failure and the volume of repair claims on new turbos increases proportionally.

 

Mikey, at Special Ops, who holds the record for highest horsepower on a stock framed turbo runs an 18# actuator on his FP Black. But, it should be noted that Mikey's 18 pound actuator has been heavily modified by cutting length off the actuator rod and he runs HEAVY amounts of wastegate spring pressure.

It just depends on how much you want to mess with the 18# actuator. You can get it to work splendidly for your 28# peak, but you are gonna have to cut the actuator rod. And then with the actuator rod cut you will have to adjust the spring pressure considerably higher by rotating the turnbuckle.

If you just install your Red/18# the way Robert ships it out to you with 14-16 PSI of spring pressure then it is gonna spool like a dog!

 

I run an FP Red fitted with the 18# FP HD actuator myself. So, I have had a chance to mess with this particular combo some.

My opinion for what it is worth is that if you are comparing both actuators for pump gas use on your BB Red, then a shortened and fully preloaded 18 pounder would be better than an unpreloaded 25 pounder. But, if you are comparing both of them uncut, and un-preloaded, then maybe you'd be better off with the 25 pounder.

 

Really? Now why would robert at FP recommend I use the 18# actuator if it would spool like a dog? That just doesnt make any sense to me. He is smart with Evos too. Why would it spool like a dog?

 

Turbo manufacturers have a vested interest in insuring that their turbochargers operate at as low a shaft speed as possible for understandable reasons. Whenever you increase WG preload, shaft speeds increase proportionally and turbocharger lifespan decreases.

What is it that you don't understand?