On3 single turbo kit
- Thread starter Turby
- Start date
Finished up the car about 2 weeks ago so I've just been figuring out the tuning part and enjoying the car since then. Still plan to do a couple minor things and hide some wires to get the engine cover back on but overall it's running very well and pulls hard to redline. Oil temps are WAY lower than with twins, highway cruising on stocks i was seeing 210-220 now i see 180-190 with no oil cooler yet. I'm running out of fuel up top, lp is looking good in the 70s but the hpfp hits 9 a couple times on a jb4 log so the tune had to be adjusted slightly for an e30 mix. Plan is to go port injection but we'll see. Issues with this kit that I noticed was mainly just the oil return fitting, its huge and hits the turbo to manifold vband which creates the problemof the turbo not being able to clock straight. It doesn't have to be vertically perfect but it was off enough to annoy me. It doesnt come with brackets for the coolant tank relocate or hose, i used the old stock chargepipe mounting bracket and used the holes from the power steering bracket to secure it. You will also need hardware, meaning 3 bolts for the manifold since the stock ones are too big to fit in 3 areas as well as 2 bolts for the oil return fitting. Other than that things i would recommend getting for sure are exhuast manifold studs atleast 16 incase all 16 pull out and exhaust manifold gaskets (6).
Here's a 4th gear pull at 20psi.
I have a few videos on my YouTube of some pulls and random stuff, ill be updating it regularly with more.
I emailed on3, They said they are going to mount a turbo to the manifold and see if they can use a different fitting they have to get it to fit better since I wasn't the only one with this issue. For now I'm using it, it's not 100% straight but its nothing ridiculous.
I got an extended oil drain and it let me clock a little more than OP but still not quite 12 and 6.. interested to see what on3 figures out
Here is a comparison between RBs and a PTE 5862. http://www.n54tech.com/forums/showthread.php?t=25886
I'll be in the same boat once my upgraded twins blow, looking into small singles because I enjoy autox and track days. The plan is to go no bigger than a 6262, and perhaps run gratuitous amounts of anti lag depending on how adventurous I'm feeling
Thanks for the link. In about 2015, @Terry@BMS notes that the data displayed was pretty old and many things had changed. Evenm after that, there has been a lot of progress made in VANOS tuning to make the singles spool a lot faster. This tuning helps the upgraded twins too, so it is not clear how much of an advantage the twins still have below 4,000 RPM.
Another factor that needs to be considered is how much torque these engines and transmissions can handle down low before rod bearings and clutch packs become a problem. I would guess that the single would be safer on the parts from this perspective.
I once read a thread where I recall Terry saying something to the effect of "If your goal is 600HP, or less, go twins". Since then singles have gotten better down low, and twins have gotten better up top. The 600HP "glass ceiling" for twins have been shattered for a long time now.
Then we have to consider reliability and ease of maintenance ...
Another factor that needs to be considered is how much torque these engines and transmissions can handle down low before rod bearings and clutch packs become a problem. I would guess that the single would be safer on the parts from this perspective.
I once read a thread where I recall Terry saying something to the effect of "If your goal is 600HP, or less, go twins". Since then singles have gotten better down low, and twins have gotten better up top. The 600HP "glass ceiling" for twins have been shattered for a long time now.
Then we have to consider reliability and ease of maintenance ...
In for "build thread"
Ouch, you got a dumb reaction, lol. Only seen that a couple times
Ill have an update very soon, just did index 12s, fit some 15 inch wheels, and gonna turn it up some. Going for 26ish psi which should be good for 600.
They were stuck in ohio for 3 days for some reason, I called fedex and they dont know where they went lol. Then randomly they showed up in arizona but the package weight went up 20 pounds so I guess ill see what was added when they get here.
Similar threads
