What have I gotten myself into?
#101
What does the Turbosmart actuator do differently than the EFR canisters? Slightly better response? Controls boost better? I want the ability to raise the boost higher than 15 on occasion. First, I my throw the Turbosmart MBC back in just to make sure the boost actually will go higher, and that I don't have a deeper underlying problem. I'm starting to have my doubts that I can make the powerfc precontrol setup work at all. Seems using precontrol with an EFR gets mixed reviews at best. I'm leaning toward a standalone boost control setup of some sort. How would the IWG75 you recommended plus something like a eboost street, utilizing the EFR solenoid work? Assuming one got it set up correctly, my porting, restrictive exhaust and water meth, it'd be nice to be able to turn up the boost a couple psi for fun once in a while.
https://turbosource.com/collections/...ll-black-14psi
#102
Junior Member
iTrader: (1)
Loved the build thread - had a nice long read. Had a something to maybe add into the mix as I've seen cars with the RB exhaust struggle to make power on a dyno even with all the name brand parts you can find... GReddy v-mount...HKS T04Z etc etc... Happy to see djseven has a good benchmark on the same dyno. Perhaps find a better free flowing exhaust that won't compromise your sound quality inside the car will get you closer to your goal?
#103
Loved the build thread - had a nice long read. Had a something to maybe add into the mix as I've seen cars with the RB exhaust struggle to make power on a dyno even with all the name brand parts you can find... GReddy v-mount...HKS T04Z etc etc... Happy to see djseven has a good benchmark on the same dyno. Perhaps find a better free flowing exhaust that won't compromise your sound quality inside the car will get you closer to your goal?
#104
Junior Member
iTrader: (1)
AFRs at 12??? That's a terrifying thought. I have a half-bridge and at WOT gives me the magic 10.9~11.1 (no meth....if I did, I would have 550+rwhp to manage....) I asked for a safe tune for track use too, so I have lots more to play with. If you were to tell me the car was N/A rotary, then a 12.5~13 AFR would make a lot more sense.
Running the car that lean should increase your EGT a lot. Running a richer setup will reduce the heat your car is making. High IATs are coming from your large SMIC setup... I believe I have a similar one as you. Looks like the old GodSpeed style ones with the notches on the sides. At speed they should reduce, but in traffic I was seeing 140F at the high end in summer. Recommendation, for myself as well, is a v-mount.
And on a side note, 400 rwhp will pull a stock GTR at 120+mph... all about weight!
Running the car that lean should increase your EGT a lot. Running a richer setup will reduce the heat your car is making. High IATs are coming from your large SMIC setup... I believe I have a similar one as you. Looks like the old GodSpeed style ones with the notches on the sides. At speed they should reduce, but in traffic I was seeing 140F at the high end in summer. Recommendation, for myself as well, is a v-mount.
And on a side note, 400 rwhp will pull a stock GTR at 120+mph... all about weight!
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Red94fd (05-07-20)
#105
I'd love to go vmount. The pricetag on a good vmount kit is just not justifiable until I've thoroughly given my current setup a shot. Godspeed you say? Interesting. Had never considered my setup may not be a true pettit cc3. Agreed on power to weight ratios. 400hp in a 2800lb car is supercar territory. I plan to address the a/f rs of the tune also. Will probably shoot for tuning 1 point richer in boost.
#106
Built Not Bought
iTrader: (14)
Originally Posted by aplscrambles
I've always heard you usually have a huge laundry list of things to address when you leave a dyno tuning session. So true.
Don't get me wrong, a shop build can go wrong to, and issues like boost control definitely show themselves once on a dyno, but mechanically a car should be well sorted before ever pushing it and paying for a tune.
#107
Junior Member
iTrader: (1)
@aplscrambles If you pull out the Intercooler and check the bottom of it, there might be a logo or branding of some sort on it. But completely agree on the price of a vmount is substantial. Although I`ve been contemplating a custom setup to reduce the overall cost and make my own air trays etc.
#108
Im not sure this should be true. If you do the work up front, you should be bringing a prepped and ready car to a tuning session. That's why a lot of tuners will not tune a car built by the owner. So many things to go wrong.
Don't get me wrong, a shop build can go wrong to, and issues like boost control definitely show themselves once on a dyno, but mechanically a car should be well sorted before ever pushing it and paying for a tune.
Don't get me wrong, a shop build can go wrong to, and issues like boost control definitely show themselves once on a dyno, but mechanically a car should be well sorted before ever pushing it and paying for a tune.
#109
@aplscrambles If you pull out the Intercooler and check the bottom of it, there might be a logo or branding of some sort on it. But completely agree on the price of a vmount is substantial. Although I`ve been contemplating a custom setup to reduce the overall cost and make my own air trays etc.
#111
That's the thread you need to look into if you are concerned about boost creep with the 8374. TL; DR version of that thread- free flowing exhaust and street (or bigger) porting is probably going to creep somewhat especailly on cold days. My problem is pretty much the opposite right now, though my boost has crept up to 20+ on a super cold day on a previous fuel system and mbc (nominally 15psi setting)
#113
No. Bought an IWG75 single port labelled as the 14.5 canister, had absurdly slow spool and about 6psi max boost IIRC. Put the medium BW canister back in and went right back to ~13 psi where addicted set it. Not sure what is going on there. Maybe it shipped with the wrong spring installed. I'm over it. Talked to Bryan at Rotorsports, and leaning toward doing a street tune with probably the medium canister and the turbosmart boost tee. We had this setup working previously with a pretty solid 15 psi setting. Should've left well enough alone.
#114
On another note. AEM sucks. A second replacement water meth controller failed. Got lucky for the 3rd time and didn't blow my motor. Ordered a snow performance vc-50, gauge type water meth controller, should be here tomorrow. Maybe try to install it this weekend. Got a local fab shop that is supposed to be fabbing a hot side pipe with a vband connection to the integrated vband on my turbo. Maybe a wiggins clamp on the intercooler side. Hopefully it turns out decent, things haven't been going so swell with the build lately. Did get to take advantage of the nice weather on sunday and go for a drive with a couple buds in the mountains. Car ran ok, just too lean under boost and the water meth system was fucked up, so I had to take it easy. Brakes, suspension and tires performed great though. Had no trouble keeping up with these two.
Last edited by aplscrambles; 05-06-20 at 08:47 PM.
#115
When you installed the turbosmart unit, was this bypassing the ecu control? How much boost do you see with no ecu control on the medium actuator?
That is the correct part number from turbosmart, and I've never seen one come with the wrong spring. If you have it off the car now, do yourself a favor and open it up. If it indeed does have the correct 14 psi springs, this would indicate there is a boost leak somewhere. It could be the BW BOV FYI( and you pretty much would never know it).
That is the correct part number from turbosmart, and I've never seen one come with the wrong spring. If you have it off the car now, do yourself a favor and open it up. If it indeed does have the correct 14 psi springs, this would indicate there is a boost leak somewhere. It could be the BW BOV FYI( and you pretty much would never know it).
#116
No, I did not by pass the powerFC. The EFR solenoid was still plugged into precontrol, with duty set at about 60 I think. No ECU control of the medium actuator I think netted us not much of a decrease in boost leading me to believe PFC boost control isn't working properly. They did a boost leak test on the dyno at addicted, but who knows... I can test the BW medium canister with precontrol unplugged this weekend and see what happens. How do you open the IWG75 to check the spring? Directions say clamp it in a vise, wtf? looks to me like it is supposed to have some kind of spanner to fit the notches.
#118
Lousy Crew Chief
iTrader: (10)
https://www.rx7club.com/single-turbo...ontrol-900599/
I’m not sure if using the precontrol side of things makes a difference (but duty for it is substantially different especially when talking about controlling the twins) as opposed to the wastegate side. Here’s a thread from a smart guy on how he set it up and how his stuff works.
Hope this helps.
Matt
I’m not sure if using the precontrol side of things makes a difference (but duty for it is substantially different especially when talking about controlling the twins) as opposed to the wastegate side. Here’s a thread from a smart guy on how he set it up and how his stuff works.
Hope this helps.
Matt
#119
https://www.rx7club.com/single-turbo...ontrol-900599/
I’m not sure if using the precontrol side of things makes a difference (but duty for it is substantially different especially when talking about controlling the twins) as opposed to the wastegate side. Here’s a thread from a smart guy on how he set it up and how his stuff works.
Hope this helps.
Matt
I’m not sure if using the precontrol side of things makes a difference (but duty for it is substantially different especially when talking about controlling the twins) as opposed to the wastegate side. Here’s a thread from a smart guy on how he set it up and how his stuff works.
Hope this helps.
Matt
#121
Looks like 3rd times a charm with my hotside pipe. Fits, doesn't hit the hood, isn't cracked, and doesn't leak. Found a new local fabricator that is bad ***.
2.5" vband welded on
Perfect fitment
Also started wiring my new snow water meth controller/gauge to replace the piece of **** AEM controller. Pillar gauges aren't for everyone, but it's in plain sight, not blocking outward visibility, and I'm not a huge fan of the steering column pods, so this should work well.
2.5" vband welded on
Perfect fitment
Also started wiring my new snow water meth controller/gauge to replace the piece of **** AEM controller. Pillar gauges aren't for everyone, but it's in plain sight, not blocking outward visibility, and I'm not a huge fan of the steering column pods, so this should work well.
#123
TGS tuning in the UK. https://tgsexhausts.co.uk/product/rx...-single-turbo/
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RX7X7 (05-27-20)