Bersaglieri

Well guys I recently bought a Phat Shaft 62 with a 14cm housing. I have a 180 truck, 0 plate full foward, GSK washer mod, and BHAF. I also have a DTT 89% converter, valvebody, and 3.54's. Industrial Injection lists this turbo as supporting 300-500hp and the 14cm housing option for 370's and up sized injectors. I talked to them and they couldnt give me any straight answers when I asked if making 30 psi max was normal for my modifications. They just kept repeating that it was wastegated at 45 or something and they thought I might have injector problems? [I made 40psi easily with my stocker before] What do you guys think? My buddy thinks it would like some higher RPM's [3200-3400 /4000GSK] and some more fuel such as 370's or similar injectors. I cant disagree since when the turbo finally lights it seems to come to a crashing stop when I can only get to 2900-3000rpms and then it hits the next gear. Does this seem normal? I did fix a boost leak that had me limited to 14psi which I knew wasnt right.

Thoughts guys? Comments? I'm the only guy locally with this sized turbo so no one can give me solid feedback. Closest size is a kid with a 35/40 hybrid and he makes 38psi no problem.

-Dustin-

aksparkey01

sounds like you need more fuel. might also want to check if you adjusted the govenor arm for that 0 plate. if not it could be diving under the plate. But it will take more fuel to light the phat shaft. Im not sure what dv's are in the auto 97 but i would bet that some 191 dv's and some ddp2 injectors would make it come to life.

Bersaglieri

I believe I have 181 delivery valves. I was looking at New Era's line up, either a 370 or 435. Not sure if 435 is overkill or just right. But I'll be doing the 4000 GSK shortly.

-Dustin-

kawi600

Ive got the 62/12 and theyre supposed to be gated at 45 from Industrial. You will find that BHAF is too restrictive for that turbo. It might not be responsible for the 30psi, but its restrictive. Id get a AFE filter and make a 4" PVC coupler if you cant afford the whole intake system.
You did get rid of the line on the back of the AFC that tapped into the wastegate signal, right? Its capped off on the AFC?
Could be a leak somewhere, or the wastegate adjustment. Could even be something holding back the governor.
Id start with pressurizing the air intake with a 4" PVC pipe cap and an air chuck. See if theres any leaks. Check out the wastegate adjustment. Last thing I might look at is your GSK to make sure its ok.
Your injectors and DV's should be upgraded too. I like my DDP's but I may go up to the DDP3 or 4. Im also considering a modded IP.
Are you making smoke anywhere in the rev range if you stab the pedal? Can you do it with that 30psi boost? If not maybe it IS the fueling..

Bersaglieri

When the thing lights, it lights and goes. Although I was thinking that perhaps I should play with the fuel screw in the back of the pump. Any thoughts?

-Dustin-

bmoeller

Unless you have the smaller BHAF, the BHAF isn't the problem. I run the NAPA 2790, and make 38psi with my 64/14. No EGT problems, empty or towing heavy. I made 45psi with the PDR HX40 I used to run, til I bumped the timing. Then it was down to 38.

If the EGTs are staying below 1200 on a hard run, don't worry about the 30psi. Right where it ought to be for the load. The 12 housing would spool faster and make more boost, BUT, boost isn't what you need to look at. You want air flow, not boost. Boost is pressure, and pressure is created by the resistance to flow.

GLHS

If you go from ann HX-35 up to a S-300 series turbo you will make less boost but the same or more power. If it feels like the same amount of power, then I would say your out of fuel.
Have you tried plugging the wastegate hose to see if boost goes up? If your turbo came with an adjustable boost elbow, just adjust the allen head screw.

Gary Emerald

I think you'll be pleasantly surprised when you get a real GSK in there

Bersaglieri

I've tried vise-gripping the waste gate line and it does nothing.

Gary, a friend of mine thinks a good 4000 GSK would do wonders for that turbo too. Any more thoughts on it? Do my results sound right for what I've got?

-Dustin-

Gary Emerald

I know your friend VERY well

Bersaglieri

O-really

Anyways, who should I get a 4000 GSK from?

-Dustin-

Captain

I personally like 3k gsk's but aside from that just get a set thats bosch springs. Also II told me that the turbo was wast gated at 40-45psi too and my sps62/14 had the waste gate hogged out by II so it would flow enough air for twins. I can hit over 60psi with it. So I tend to think that the gates are to terribly fine tuned.

Bersaglieri

Minimum words per post FTL.

-Dustin-