Been debating between this or a green myself... Also injector size.

 

I run 500awhp through my 6 speed and have been for 15k miles. No issues here. The biggest thing that ruins them is heat. Hard launches aren't even that big of a deal compared to the issues road racing one will cause.

 

Keeping your ACD setup? I'm curious where you plan on locating the cooler. It was a no brainier for me after pulling the pump, as cutting the plastic that protects the pump made a great fresh air inlet. Plus the engine oil cooler is on the other side in the exact same place, so you know it works. I drilled small holes in the frame behind the headlight to mount the cooler pump, to keep all of the cooler components close and compact. Sorry for the thread jack!

 

Keeping the ACD pump, yes. The cooler will be small and mostly being used to radiate heat. If I can find air to hit it, I will.
I can't imagine the heat being too out of control in the trans. I'm just looking to drop temps a bit.

 

Sorry for the hiatus. We did get the install finished and did a road tune. I will post up the VD once i get it finished.

Remember this isnt about trying to MAX out the power, more that we can use the stock injectors and be safe with the 71HTA on the 8 MR

Ok so using the 96530706 ROM. Tuned on 93 octane ( shell ) WGA arm was set to 1/2 hole offset. Forge IX WGA had a 18 psi spring in it.

We hit 26 psi off the gauge AND from the JDM 3 bar Map sensor at around 3900. We let it taper quickly to 19. And hold that to 7000. AFR targets were 13.0-12.5 during spoolup and then 12.0-11.8 to 7000.

IDC ended up at 84% in the last 3rd gear pull to 7000 so not too bad

WGDC in all gears was held to 70% from start to 4000 then tapered to 40% in all gears at 7000.

Car previously had the 05 MR 10.5 turbo doing 27 psi tapering to 23/22. That was running 13.0-12.5 AFR in spoolup and then 12.0-11.8 to 7000.

Driving comparison= they are close, but the 71HTA feels like ti pulls harder to redline despite the incomplete unfinished tune.on it. My mechanic has a IX tuned with stock injectors and the 71HTA pulls a little better, especially up top.

During the tuning, it was apparent that with injectors it could make quite a bit more. Probably still limited too by the custom exhaust that is NOT 3 inch.

For the good news.....Aby had said that the turbo would be loud ( so did others ) Well it makes a nice whistle but NOT loud. Sounds like a very quiet jet. :-)

Car is actually quieter now ( minor exhaust leak fixed too) Part of it could be the new turbo is not screeching like the old one. Inspection of the intake compressor wheel showed wear on most of the fins ...yikes... little chunks missing.

We ended up using a B&M stacked plate oil cooler. Oil pan was removed and flushed but nothing there at all. Intercooler was flushed repeatedly, but we did not get anything from that either.

One more thing we noticed: so the old turbo was fed off the head ( viii ) The new one uses the FP line off the oil filter housing. We noticed immediately that the oil pressure was higher at idle ( 18-20 before now 22-23 after ) . And during runs it ran about 80-100 psi whereas before it was running 60-80. Previous oil was Mobil 10-40 and we are now using Brad Penn 10-30. should actually be less pressure but not so. Striking difference was during the runs, though.

Long post...LOL so we may just order some ID 850's and re visit everything once we hit 1000 mile and change the oil again....More money for the loss wink wink

 

I was going to do a fp red but having to get all the other parts to have it running is adding up lol
the 71hta seems more realistic just slap it on my 10.5 housing. This thread is giving me more confidence in such a decision.

 

Glad to hear you like it.

 

that i am liking,sir.

James , my mechanic/tuner has a journal bearing Black that he was wanting to put on his IX. After seeing what the 71HTA did on my car, really without injectors and on a smaller exhaust, he was thinking of maybe going the 71HTA..

It will be this weekend before i can do some 3rd gear pulls and get the data for VD.

Meanwhile, just curious but what is the concensus for 850 size injectors. Looking for easy setup, drivability, and easy to tune. Be nice to have them resistant to clogging as well.

Ball and seat ? disc ? pintle?

LMK, please, what you have on your 71HTA..

 

Those should be good for 450+ on 93oct and a 255 Walbro
​​​​​Resistant to clogging?
I ran 1450s because I had to use e85. Only 85 and 91oct, where I live.

 

If you are staying pump a set of 850s will be fine. My suggestion would be to do what kaj did and go bigger. That way if you decide you want to go to e85 or a larger turbo you won't have to re-buy injectors. There isn't a penalty for running a set of 1200+cc injectors at a lower duty cycle so why not be prepared for when you want more power.

 

OK thanks….Im looking for specific information on 850 cc injectors for 71HTA..

Not gonna use E85 period. Not going to 3 in exhaust. Already on Walbro 255. Will not go larger than 850 cc period. Boost is already 26>19 on stock injectors. Just want to do 26 > 23 and get the AFr a little more like 11.5 after spoolup

Here is an example:

IE “ im on FIC 850 or ID 850 or Denso 850’s using 91 or XX octane and they were ( or were not easy to tune ) . Driveability seems ok but cold idle is lumpy. Latencies were not easy ( were easy )to target in. AFR was tuned to 11.2 ETC

Please be specific…..

 

You are kinda stuck, seeing how you are set on certain parts. Just get what you can from it and it is what it is.

 

on the evo 9 HKS 7460 and evo X MHI 18 K evos I built we used ASNU 1000 injectors... in evo 9 case it was just a matter of deleting the resistor pack with a spoolin up connector and otherwise it is a straight fit with no additional adapter

Latencies were easy as they come with good info from the factory, no problems with idle even with S2 cams, no smoke, car starts immedeately..

here is the video example

ok, this is on SD (which is great for driveability) but just illustrates that it works..

 

thread updated with VD graph in first post-OP

 

310-320 is stock/tune whp. You really need injectors.