Jump to content
SAU Community

Recommended Posts

  • Replies 58
  • Created
  • Last Reply

Top Posters In This Topic

Avoid driving it dude, because lean afrs on cruise can and will burn your exhaust valves.

why would it be lean on cruise? i think your right with any boost it is leaning out, that must be why the light started flashing on mine, or maybe the tune.:whistling:

Here is how the intake was setup when it was stalling.

IMG_3970.jpg

This is how I had it afterwards to fix the stalling. I'm more convinced it was the ripples in the flex pipe than the extra length and bend, obviously had the air filter on for the test, this was taken before I put it on for the sake of the pic :).

IMG_3972.jpg

Its the angle the BOV enters, not the bend that causes the stalling imo. It looked like a nice intake until you ditched the airbox. :thumbsup:

I have to agree with scotty here

You can imagine the BOV just venting and bouncing around in all directions disrupting the flow.

When Scotty designed mine it dumps into the intake on an angle towards the turbo

Yet another thread full of mafia's condescending crap, i hope it makes you feel tough :thumbsup:.

Not really hey, I've seen the AFRs after many of these upgrades and I know for a fact that they run lean and its not advisable to drive them far or at all.

So, dribble your shit elsewhere.

why would it be lean on cruise? i think your right with any boost it is leaning out, that must be why the light started flashing on mine, or maybe the tune.:whistling:

I wondered the same thing, but I've seen it on a few cars.

I'm thinking that at 2,500rpm and above the turbo is spooling a tiny bit, making the air path easier into the motor. Being a bigger turbo, its able to help more air into the engine. Think about it, at those revs, the turbine is spinning at a notable speed. The compressor would be "helping" the air get into the engine easier on vacuum, allowing it to breathe easier.

What had been tuned to 14.5 - 14.7 afrs on cruise, I'd seen go above 15. Also caused the engine to run a little hotter at cruise due to being a little leaner.

Not all but a number of cars.

Oh no not a 5% rise in AFR's, how on earth are the exhaust valves going to survive that. Load is determined by the AFM, unless theres a leak or something else isnt working as it should then its fine to drive normally. Sure the AFR's arent always going to be EXACTLY the same as they were before but your not going to kill your motor by driving it around under light load. It takes AFR's upwards of 17-18:1 to do any damage to valves and pistons under light-medium load and you'd know all about it if it was that lean.

Not really hey, I've seen the AFRs after many of these upgrades and I know for a fact that they run lean and its not advisable to drive them far or at all.

So, dribble your shit elsewhere.

I wondered the same thing, but I've seen it on a few cars.

I'm thinking that at 2,500rpm and above the turbo is spooling a tiny bit, making the air path easier into the motor. Being a bigger turbo, its able to help more air into the engine. Think about it, at those revs, the turbine is spinning at a notable speed. The compressor would be "helping" the air get into the engine easier on vacuum, allowing it to breathe easier.

What had been tuned to 14.5 - 14.7 afrs on cruise, I'd seen go above 15. Also caused the engine to run a little hotter at cruise due to being a little leaner.

Not all but a number of cars.

i agree to this , the engine seems more powerful even without boosting compared to my old highflow i had, and that is significant , and its odd but i think true... and with cams i find it even more noticable..

Edited by SliverS2

Oh no not a 5% rise in AFR's, how on earth are the exhaust valves going to survive that. Load is determined by the AFM, unless theres a leak or something else isnt working as it should then its fine to drive normally. Sure the AFR's arent always going to be EXACTLY the same as they were before but your not going to kill your motor by driving it around under light load. It takes AFR's upwards of 17-18:1 to do any damage to valves and pistons under light-medium load and you'd know all about it if it was that lean.

No worries. So you just take your nose out of your ass shove your nose up the exhaust and have a sniff, and go "Yep, shes safe enough, thats about 16:1"

My whole point - Unless you have a wideband you have NFI. So is it worth the risk.

I've also seen cars cruise fine at 17:1 without a miss. Wonder how those exhaust valves are doing.

Who knows. But nah, she'll be right hey. Just spent $6k on a turbo upgrade, its just money. Who gives a f**k about the engine.

Its ok though, my cars will always be safe. And the people that listen to my advice.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Did this end up working? Did you take some pictures?
    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
×
×
  • Create New...