Jump to content
SAU Community

Recommended Posts

I run an rb26 in a s13.5 silvia and the last time it was on the dyno, struggled to crack 300rwkw. I was aiming for 350kw plus. I'm not sure what's got to change to get there. It has a set of new -7's at the moment, but I have some hks 2530's also. Hks 264 cams, hks 800cc injectors, hks rail, forged Pistons, rising rate pressure reg, nitto oil pump, nitto collar, crank was ground and balanced etc... microtech LT12s, Ross balancer. Tuner says everything is sweet but I guess I just expected more. Only thing I'm unsure of is the fuel pump. can I just hook up an 044 and use whatever's in the tank as a feed pump? or is there a few more mods that need to be done?

Link to comment
https://www.sau.com.au/forums/topic/463851-stuck-at-300kw/
Share on other sites

To see 350 out of -7s you're going to need an exhaust that's bigger then the one you currently have, run e85 and lean on the boost. You probably also need a crank trigger system so that you tuner can lean on the timing a lot more

Also 350 is going to be your limit with -7s even with e85

Link to comment
https://www.sau.com.au/forums/topic/463851-stuck-at-300kw/#findComment-7702696
Share on other sites

I had a feeling you were going to say that about the -7's. It was a cock up to begin with, a customer of ours runs a workshop that specialises in turbos, I wanted -5's but somewhere along the line -7's were sent instead. I got them for a pretty good price so I didn't want to rock the boat. I was after an upgrade from the hks 2530 turbos which i thought were stuffed because they started pumping out white smoke one day at the track, but as it turns out, the new turbos did the same thing. it was an oil drain issue and the bloke that checked them out just assumed the turbos blew. He also told me they were shit and not worth fixing. Hence the new -7's. I guess I could sell the hks turbos and the -7's then get something a bit bigger. Any recommendations?

Link to comment
https://www.sau.com.au/forums/topic/463851-stuck-at-300kw/#findComment-7702699
Share on other sites

A 2530 and a -5 are very close to each other in terms of response and power that can be achieved, going from 2530s to -5s is more of a sidewides step.

The only bigger bolt on is the -10/gtrs but it well documented that are terrible turbos and really don't work on anything under a 3L

Your other option is do the same as everyone else and go with a modern big single, which allows you to have great response and great power

Link to comment
https://www.sau.com.au/forums/topic/463851-stuck-at-300kw/#findComment-7702723
Share on other sites

I'm thinking I'll run the motor in with the -7's (since they are already bolted up), make sure the motor is all good and then try the big single route, once I know everything is holding together. I've been reading up a bit since I posted this and a decent single does seem like the way to go. I need to spend a bit of time on suspension also before I get any faster.

Link to comment
https://www.sau.com.au/forums/topic/463851-stuck-at-300kw/#findComment-7703032
Share on other sites

I had a feeling you were going to say that about the -7's. It was a cock up to begin with, a customer of ours runs a workshop that specialises in turbos, I wanted -5's but somewhere along the line -7's were sent instead. I got them for a pretty good price so I didn't want to rock the boat. I was after an upgrade from the hks 2530 turbos which i thought were stuffed because they started pumping out white smoke one day at the track, but as it turns out, the new turbos did the same thing. it was an oil drain issue and the bloke that checked them out just assumed the turbos blew. He also told me they were shit and not worth fixing. Hence the new -7's. I guess I could sell the hks turbos and the -7's then get something a bit bigger. Any recommendations?

Sounds like you need a new turbo guy!

Link to comment
https://www.sau.com.au/forums/topic/463851-stuck-at-300kw/#findComment-7704634
Share on other sites

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

    • A few small updates since the previous post and lessons. I decided to do a little interior light upgrade on the 110. I quite like the iilumo items, even if they're a bit of a premium over other brands. You'll also note the Stedi Fogs, that will go into the S15 fog lights as I needed to match the bulbs since I got the new ones earlier. I hope they fit as the body is quite a bit longer than your normal bulb.  Annoyingly, I managed to trip the fuse, which normally wouldn't be an issue until I located the fuse. I can't say I've ever come across this. I had lucked out that someone nearby had a spare, but oddly enough Toyota dealerships seem to keep this in stock. I ordered some to keep in my stash and as luck would have it, someone else nearby tripped the same fuse so I passed on the favour.  I also did a little service on the 110 ahead of some additional work coming up. It's been annoying that Goleby's stopped carrying this particular HKS filter for the 110, so now I need to keep them on order from Japan. I also took the opportunity to install a bash plate and number plate riser. The plate riser is such a cheap but nice fix to help really tidy up the car. I'm tempted to now also replace my headlights, on this car. Both items were from Project Aero.    I also needed to replace the rear tyres on the 110, and after trying to get it aligned learnt that I need to replace some bushes in the front end, so that's next.  Closing out this update with a nicer picture as always! 
    • Yeah mate, never miss it.
    • Any going to watch World Time Attack at SMSP this year?
    • Appreciate the correction on the "ground", that will make a huge difference to looking at this. That makes complete sense about AF70/AF71 which is what I had come down to being the issue, one of these. I'll have another look in the ignition wiring when I get a chance next week. I'll also make up a jumper wire for running that AF73 test.  ECU is fine, relay itself is fine, pump harness is fine and the pump itself is fine. I am going to upgrade the Walbro 255 anyway with a DW300 I have since I need to replace the fuel sender and I'm going to upgrade the FPR with my chasebays kit ready for new plenum/injectors/dbw, but I'll get this working first. That's why this is so frustrating. 
×
×
  • Create New...