That sounds pretty normal for a 264/272 combination but the best way is to physically check the cam gears with cylinder 1 at TDC. Yan can pull all four plugs to make rotating the crank pulley easier when you do this. Also, how many inches of vacuum do you pull at idle?

I personally think you just really need to boost leak test it and Seafoam it to see what's happening in the intake and exhaust tract.

andymoraitis said:

That sounds pretty normal for a 264/272 combination but the best way is to physically check the cam gears with cylinder 1 at TDC. Yan can pull all four plugs to make rotating the crank pulley easier when you do this. Also, how many inches of vacuum do you pull at idle?

I personally think you just really need to boost leak test it and Seafoam it to see what's happening in the intake and exhaust tract.

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I pull anywhere from 12 to 16 inches of vacuum at idle.

Also.. where is the best vacuume source to draw in the seafoam at?

Never mind I went back through your link you gave me about seafoam.

andymoraitis said:

That sounds pretty normal for a 264/272 combination but the best way is to physically check the cam gears with cylinder 1 at TDC. Yan can pull all four plugs to make rotating the crank pulley easier when you do this. Also, how many inches of vacuum do you pull at idle?

I personally think you just really need to boost leak test it and Seafoam it to see what's happening in the intake and exhaust tract.

Click to expand...

Well... I finally did a boost leak test today, and I only found one, and it was a major hiss at the TB, and I'm talking about a major hiss!!!

I'm assuming it's the TB seals because everytime I manually flipped the throttle while I had the system pressurised at 20psi it got louder, and it didn't take no time at all for it to bleed off either.

I thought there was a thread around here somewhere on how to replace them, so if you or anyone knows please feel free to link me to it.

I guess for now I will go to the dealership and order the seals whenever I find which ones that I need.

I haven't done the Seafoam treatment as of yet because I just changed the oil when I did the turbo swap, and it seems that everyone at the Seafoam link that you gave me agreed on changing the oil after the treatment, but I have only put about 200 miles on the turbo thus far.

I'm not to sure if this boost leak has anything to do with any of my problems that I've been having, but I'm sure it will help something if I fix it that's for damn sure.

Thanks again for any advice, and or info!!

Regards,

Anthony

Any updates on how the car is running?

JayRolla said:

Any updates on how the car is running?

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No... not as of yet bro, because I screwed up my throttle body trying to get one of the screws out of the throtttle plate and broke it, instead of just stripping it like most people do. I also broke my dang screw extractor bit as well, so I'm currently awaiting on another TB to arrive shortly.

Well... I finally got the TB rebuilt. I ended up getting the pricey seals from MACH V instead of O rings. The tb shaft seal was a pain in the ass for me, but I tried to do another run the other night nonetheless.

It was cool outside being at 45 degrees, so I ended up boosting 23psi, in which I really think I need to turn down to 20psi.

Anyways... the run didn't seem to look much better, but boost response felt better this time. I guess I'm going to do the seafoam treatment to see what happens, and turn the boost down as well.

Thanks for your advice!!


The AFC was set at -31 on the hi settings.

RPMS: 2652 O2: 0.03 TIMING: 28 TPS: 96 AIR FLOW: 4.58
RPMS: 2808 O2: 0.03 TIMING: 27 TPS: 97 AIR FLOW: 5.25
RPMS: 2980 O2: 0.03 TIMING: 27 TPS: 97 AIR FLOW: 5.91
RPMS: 3188 O2: 0.05 TIMING: 25 TPS: 97 AIR FLOW: 6.91
RPMS: 3432 O2: 0.05 TIMING: 23 TPS: 97 AIR FLOW: 8.15
RPMS: 3660 O2: 0.07 TIMING: 21 TPS: 97 AIR FLOW: 10.29
RPMS: 3944 O2: 0.87 TIMING: 14 TPS: 97 AIR FLOW: 13.34
RPMS: 4300 O2: 0.93 TIMING: 9 TPS: 97 AIR FLOW: 15.59
RPMS: 4676 O2: 0.95 TIMING: 5 TPS: 97 AIR FLOW: 18.41
RPMS: 5044 O2: 0.95 TIMING: 5 TPS: 97 AIR FLOW: 21.42
RPMS: 5384 O2: 0.95 TIMING: 6 TPS: 97 AIR FLOW: 23.21
RPMS: 5688 O2: 0.95 TIMING: 9 TPS: 97 AIR FLOW: 23.02
RPMS: 6056 O2: 0.95 TIMING: 11 TPS: 97 AIR FLOW: 23.41
RPMS: 6368 O2: 0.95 TIMING: 12 TPS: 97 AIR FLOW: 23.92
RPMS: 6640 O2: 0.93 TIMING: 12 TPS: 97 AIR FLOW: 23.79
RPMS: 6856 O2: 0.93 TIMING: 13 TPS: 97 AIR FLOW: 23.75
RPMS: 7044 O2: 0.93 TIMING: 12 TPS: 97 AIR FLOW: 23.60
RPMS: 7216 O2: 0.93 TIMING: 13 TPS: 44 AIR FLOW: 3.34

Timing is way low which means you were knocking big time. Turn the boost down and tune some more.

olmytsi said:

Timing is way low which means you were knocking big time. Turn the boost down and tune some more.

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Yeah I agree!!

I plan on doing that as soon as the weather around here gets a little better.

I know it's been awhile but I'm still having problems with late spool.

I did a compression test last night and every cylinder was 150 to 160 across, and that was after the motor had been turned off for about an hour, so I think I'm OK with my compression.

I'm going to seafoam it next to see if I'm getting any pre turbo exhaust leaks.

I'm really starting to lean torwards my wastegate actuator as being the culprit here because of it being so tight, and the fact that I'm only running 19 to 20 psi of boost, because there is only about three threads still showing on the wastegate arm.

Just did the seafoam treatment and I had a small leak coming from around the exhaust manifold gasket near the timing belt cover, and a small one from around the O2 housing gasket, but I'm still not sure if replacing the exhaust manifold gasket will help my spool up time as much as I would like it to.

I did a couple of wot third gear runs and I'm not hitting 20 psi until about 5000 to 5200 rpm, and that's just not cutting it for me damn it!!! I may try and pull the hose off of the wastegate actuator and test to see if that helps anything, of course I will be monitoring my boost very carefully, but that will help diagnose if theres anything wrong with my actuator hopefully.

Update: I finally got around to sending my turbo back to Forced Performance before my warranty ran out in September, because I had tried everything possible to figure out the problem on my own.

I got a call from Brian Wilson @ FP and he told me that they were at fault, and that they have corrected the problem with my turbo and that it was on it's way back covered by there warranty no questions asked.

Here is a picture of my invoice of what he did, so maybe now I can finally get around to start really enjoying this thing. I will give another update on how shes performing once I get it installed again.

Nice.

Thanks for updating us with the resolution to your problem. I didn't even bother posting since I was stumped as to why you were spooling too late. Now I just want to find out what TW and TH are.

Hey spyderturbo007 hows it going bro?

Yeah... I didn't want to leave the thread abandoned so I figured I would keep updating it as I went.

It's taken me awhile just to get to this point after all the boost leak tests, compression tests, seafoaming, new exhaust manifold, new gaskets and what not. I was about to start pulling my hair out.

I'm just glad FP backed me on it, and since they did I will keep on doing business with them from here on out.

Brian @ FP told me that this newer TH didn't need to be ported like the other one that was previously installed. He said I should notice a hellava difference this time around.

Here's some pics:

Yeah these new turbine housing they have look intresting. I saw them on that new 18g they are selling. Let us know how it works out for you as I am intrested.

fwdeclipse said:

Yeah these new turbine housing they have look intresting. I saw them on that new 18g they are selling. Let us know how it works out for you as I am intrested.

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I sure will bro!

Generation X said:

Hey spyderturbo007 hows it going bro?

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Too much work, that's about all.

By the way, that's a sexy turbo you got there.

Let me know how that internal wastegate works out for you. I've been considering upgrading to something larger, but I really don't want to go with the external gate. My wife thinks I spend enough money on my car as it is. See how far I can push the stock HG and head studs.

spyderturbo007 said:

Too much work, that's about all.

By the way, that's a sexy turbo you got there.

Let me know how that internal wastegate works out for you. I've been considering upgrading to something larger, but I really don't want to go with the external gate. My wife thinks I spend enough money on my car as it is. See how far I can push the stock HG and head studs.

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Yep... I know all about the working ordeal it sux!!

Thanks for the props on the turbo, for I think it looks sexy to. I just want it to perform sexiness.

I went with the internal gate because of the obd2 emissions testing here where I live at in NC. I don't need any other distractions while getting inspected if you know what I mean.

Anyways...I know how you feel about the wife thing. My wife thinks the same as yours, especially after I've already had to replace the transmission in my WRX after breaking 2nd gear. That in itself run me about $1100 for just the new re-advised gear set from Subaru. So... the WRX is staying stock for now per the wife.

I will definitely keep updating this thread as time goes on so stay tuned.

Hey whats going on man. I was just reading through your posts and im curious about the outcome? Hopefully its a good one. Also how do you like that turbo? Im actually thinking about the fp green but theres so many options im not sure which one to get.

I'm finally starting to get my car dialed in with your FP BigT28! I wound up buying a Hahn SMIC and installing a aeromotive afpr along with the dnp ss exhaust manifold!

Welp..... to my dismay what FP did for me didn't help at all. I'm still in the same situation as I was before, and bmoha2... now I wished I hadn't sold you that turbo. Nawww... I'm glad it's still working good for you bro because that turbo worked fine on my car unlike this one.

Anyways..... My car has now been at my personal mechanics performance shop here in western NC for about 3 weeks now. I checked eveything over completely before driving it to his shop. I've replaced my exhaust manifold, exhaust manifold gasket, and manifold to turbo gasket. I have checked the timing which is fine. I have boost leak tested to 25psi and it held for over 5 min before finally bleeding off.

Now... I have had my mechanic which has a 800 whp Supra to double check everything that I have checked, in which he did, and he's assured me that the timing is fine, and that I have no boost leaks what so ever. Compression is fine, he did a leak down test which was fine. The only thing that I can possibly think of now that's left is my GReddy Type-S bov or my wastegate actuator, in which Brian at FP told me was fine. I may try to find another bov and see if that helps any. If not I'm getting rid of my car and moving over to a Suzuki Hayabusa for my speed fetish.

I would just leave the boost where it is and add some fuel where its knocking. These runs are all on pumpgas right??

alex1090 said:

I would just leave the boost where it is and add some fuel where its knocking. These runs are all on pumpgas right??

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The thing is, is that I can't run anymore than 20 to 21 psi period!!! Even with the line to the wastegate actuator unhooked I should be getting uncontrollable boost, but I can hold it to the floor and all I get is 20 to 21 psi. Plus I'm getting that 20 to 21 psi by a miserable 5500 rpm which is horable.

And yes... all my runs were on pump gas. Another thing that's messed up is that I can run a line from my boost source which is located on my lower IC pipe straight to the wastegate actuator and the turbo will spool perfectly to 14 psi by 4000 rpm which is what the actuator spring is rated at per Forced Performance, so go figure. All I know is that I'm starting to get really burned out on this issue.

mix up a batch of tolulene or xylene and see what happens...not a lot

bmoha2 said:

mix up a batch of tolulene or xylene and see what happens...not a lot

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I really think I should be able to run 20 psi on pump gas even with my cams.

The problem I'm really concerned about is the slow spool, and the deal with disconnecting the wastegate actuator and the boost not being uncontrollable. I may try and purchase another bov and a new wastegate actuator, and if that doesn't help anything then I'm selling it. I've only put 25,000 miles on this car in the 9 years I've owned it.