sounds great buddy i appreciate it

 

Hey guys,just a bit of information here,i had a bit of trouble with the wastegate on this turbo,not a biggie though,i found out it was very sensitive to wg preload making it problematic to spool adequately,well today i cut off the wg flapper so it wouldn't be in the way since i decided to go external wastegate and this is what i found,i'm not sure how big the factory wastegate flapper is but this one is huge imo,almost 49mm ! ,even my Turbosmart is only 45mm lol.

 

Mine should arrive in a day or two. What PSI actuator did you use? Apparently the WG hole size is 36mm.

 

welp, i had some bottom end noises going on right before my turbo install and tore the motor down last night....two pistons have some severe scaring and my compression was 110, 90, 110, 90. so now, im building a 2.3 stroker to really match my friend's car i built a year ago. i built him a manley piston and rod combo 2.3 and he has the fp4r cams and an ets fmic and now is pushing the HTA71 while i will be on a wiesco and eagle combo with cosworth m2's with an ets fmic. should be a pretty good match up once its all said and done. i cant wait until next week. oh and we are having the same guy tune them.

 

bigger internal flappers are a bad idea. takes too much preload to hold them closed. plus the air has to flow around valve to get out so making it bigger does not help flow.

 

did any of you port the hotside and actually bring the twin ports to a point on the single flapper 9 10.5 hotside? apparently fp did this on their turbos. i did it on mine and hold boost very very well and have great response. just something to think about.

 

I originally had the stock 18 psi actuator but i had nothing but problems with it so they sent me a 25 psi actuator,but still i had to modify it to make it work properly,after modifying it it worked ok though,so now with the new set up i just decided to go external and bypass the whole wg issues.

 

I agree dude,that's exactly what happened to me,even with the 25 psi it was still too laggy,so i had to cut the threaded part of the actuator to let the turnbuckle come in further and provide better preload which cure the lag issue.

 

Interesting - I head lots about the internal W/G issue but want to have a good scientific look at it. In theory as long as its sitting right when closed it should be manageable. The exhaust pressure pushing against it will take some pre-load to improve and make the release pressure near actual design (I bought a 22PSI, wanting 17-18 initial) - it or an additional external spring might help. The flow restriction issue shouldn't be a problem when its fully open (like below) so it should regulate ok. The issue I think is where you buy a W/G actuator rated too low. Time will tell.. I'll make sure in my case that the WG flapper clears the Nvidia O2 housing when fitted.

 

Sorry its been a while since I updated this, but you guys know I was building a 2.3 stroker for this turbo setup to see what it could do against a 2.3 I built last year. His setup has the FP HTA71. We will be running the same boost, have the same tuner, and will utilizing the same fuel as well. So, on to the pics!







After her first start, first oil change, and first 20 miles about to get her second oil change


Currently the new motor has 730 miles on it....and I built it on the 26th of May. lol took me only 4 days to get it done! Long story short, I dropped the motor off for machining and balancing on the 21st got it back on the 24th, put it together after cleaning it on the 25th, installed it on the 26th had it running that night, drove her on the 27th! The break-in tune is very conservative and has allowed me to be able to perform full pulls (hard break-in) with no knock and safe but not pig rich afr's. The car's boost has also been turned down a tad so that I wont get too happy with the loud pedal. But at only 17psi it surprised a 600cc CBR. Id say this turbo is going to be well worth its wait for certain. I cant wait to crank it up to 25+psi. Stay tuned!

 

did you have to notch the ribbing on the block for number 3 conrod?

 

In for results!

 

damn, that was a fast rebuild lol. good job man. im glad your enjoying the turbo. im sure your going to make some great numbers but id definitively opt for the bigger td06 turbine to fully utilize your turbo and give it hell. running 25+ psi is going to make a difference, but egt's will rise and the td05 turbine will cause tons of back pressure. also, the boost might not hold that high for so long thru the powerband and may act as just a spike. may also not contain that nice torque curve after a designated boost pressure. but, only one way to find out im in for results and hope your 25g-td05 works wonders

 

Here's a pic of the 25G billet wheel installed.. this custom wheel was out before I got to install the normal 25G and figured I would not go wrong with it.

It is really a totally different design and trim than the standard 25G. Besides being very light, the central section is smaller and the overall wheel is taller than the normal 25G. At lease 5-8mm taller. Will not be surprised on the claim of flowing 15% more. The overall design seems to be a GTX copy but wondered why still 5 Blades?

Nevertheless, looks very bad ***

 

I did not. I think that is only for the long rod strokers. Personally I have not built a LR stroker yet but am trying to convince my friend to go long rod. (its a girl). My assembly went in as if I was building a normal 4G63.



You know, the more I drive this car and the more I ask of this turbo the better it seems to do and the more it surprises me. I'm TDY in Colorado Springs right now and am going to have a map done up by a friend of mine out here and then get it on a local dyno to see what it makes and the power/torque curve. That's what's important to me right now. The altitude kills the low end but once she starts singing I have to plot out where to be on the road. Its deceptively fast right now and for now at 17psi holds solid, but that's easy, ya know. The real test will be to see how the stock wastegate holds up to the punishment and to see how my torque and boost look relative to each other AFTER the midrange. Thanks for the great wishes and yeah it was an intense rebuild but I was in my little dungeon knockin it all out while listening to my music. I was in heaven.