After checking out my logs from the last Street Legals, I noticed the turbo was way laggier then usual. I mean, I normally get full boost @ 5K, but 7K WITH a 75 shot is ridiculous . I suspected something was screwy so on with the investigation. After checking the usual; exhaust leaks, base timing, mechanical timing, BLT w/ pickles on the side....nothing. Disassembled the wastegate & did find a pinhole in the diaphragm, but nothing that would cause extra lag. Finally, I decided to drop the turbo for shits & giggles........& what do you know. Now to decide which route to take next:

-Rebuild the FP3575
-HX40 in the FP housing.....I like
-PTE Billet in a bolt-on or FP housing....iffy in the reliability department, but price is right.

I say rebuild or go with the HX40.

That turbo put up with a lot of crap in its like. How much anti-lagging went on with it?

I would suggest that since you are upgrading the turbo to go ahead and move to a t3 hot side, as with the nitrous you are moving alot more exhaust gasses. A t3 housing will allow for a less choke point when stalling up on the nitrous. In which if you do the bullseye .70 ar housings, it can be had for $200.00 from extremepsi.com.

The GT37, aka 37r wheel is 72.5mm & the FP housing came in @ 73mm...so we're in business!! The FP housing is 0.70 A/R & these HX40's have had good results with the bullseye housing, so they should go well together....now just gotta find a 40.

Dam that wheel has seen better days. Anyway, been telling you HX40 would be your best bet. In a .70ar hotside you should be able to max out that turbo, guys have done some great numbers with a bolton .55 housing so i can't wait to see what the .70 will do with a 50 shot. The 6 and 7 blade hx40 are 69lb/min turbos my friend! Even the more common 8 blade hx40 still flows 60lb/min! Were you looking at getting a brand new holeslut? or trying to find a used one first?

Well, used ones + a rebuild puts me around $350-$500ish just gestimating. I have seen "new" ones go for $800+ on flea bay....but who knows if they're real & sometimes those pics aren't clear enough to tell. At this point I'll take anything. The 6-blade would be a nice find, though.

It'll be real interesting to see the results from this.

ooohhh snaps vato. Good call on finding the issue.

yeah the guy out here in the IE said he would sell a HX40 with no exhaust housing for $450 and im sure he could machine your housing to fit. but like others said, you should step up to a T3 housing especially with an HX40

I'll give your boy a call within the month Adam

An FYI, I found a quote from Robert @ FP stating their FP30 housing flows like a .63 a/r T3. Eventually, I'll jump on t3 wagon.