Jump to content
SAU Community

Recommended Posts

24 minutes ago, SimonR32 said:

Direct back to back change... Same boost, 30psi

6870 made even more power with extra boost while the 9180 was all out

Yeah not too surprised that the EFR9180 was out, I would 100% expect the 6870 to outflow it - and by a bit of a margin.   The boost threshold however is a definite surprise.   Interesting how some results can vary!   Hard to know what to make of it.

On 4/25/2019 at 2:27 PM, SimonR32 said:

The precision is the ones that comes on way earlier and makes more power...

I'd like to see the transient response make up for that deficit 

Which rear housing was on the efr?

  • 3 weeks later...

Hey all, 

Bit of an update from late last year. 

Precision 6062, built s1 rb25det, e85 etc

Got it tuned last year and it made 431kw @26psi apparently the turbo was maxed out. Dyno dynamics roller dyno. 

I decided to change the wastegate springs from 14psi to 21psi, fixed a boost leak i found underneath the intake manifold ( idle control- cold start valve area ), hpi evolve radiator and decided to run a viscious fan again.  Might have been a few other minor changes. 

We stopped at 29psi as we were a little worried about the arp 2000 headstuds not handling much more. Turbo seemed to be still going and I think we could have gotten a bit more out of it if the headstuds weren't a limiting factor. 

This is on a mainline hub dyno so it is 710hp at the hubs. Still quite happy with the result and I'm sure the 6062 could keep pumping. I attached a video of the run, hopefully it works. 

We used Real Dyno hub dyno and Brad Sheriff from Boost Automotive Tasmania tuned the car. 

20190515_163330.jpg

  • Like 2
  • 2 months later...
38 minutes ago, reaper said:

Nope haven't seen anything. I'm trying a 7275 this week and will compare to my old 6870.

What was the 6870 like? I know I could search this post but who the hell knows how far back I may need to go to find a post....

I have a 6766 with a 1.0 rear and I don't know if the lack of driving but its started blowing blue smoke the other day. highly unlikely to be the  engine so it might be time to up the turbo a little

4 hours ago, feedmyfast said:

Hi Guys,

sorry it has been so long. here are the results from my 6466 @40psi. The car is a different animal now, had to get some drag radials to put down the power.

Loca Dyno - 873.jpg

What's the rest of your engine setup?
I also have a 6466 to go on mine.

24 minutes ago, iTzTMG said:

What's the rest of your engine setup?
I also have a 6466 to go on mine.

S1 RB25, Kelford 270 cams, supertech valve train (stock sized), CP pistons (stock bore and compression), Manley rods, balanced crank/ block. Otaku manifold, ID2000s

  • Like 2
6 hours ago, feedmyfast said:

Hi Guys,

sorry it has been so long. here are the results from my 6466 @40psi. The car is a different animal now, had to get some drag radials to put down the power.

Loca Dyno - 873.jpg

Have you raced it? what mph did it run if you have?

Edited by ido09s
6 hours ago, feedmyfast said:

Hi Guys,

sorry it has been so long. here are the results from my 6466 @40psi. The car is a different animal now, had to get some drag radials to put down the power.

 

Ha! That is ridiculous, nice work!  That's gotta be one of the more stout RB25 setups out there, being SAU people will probably make dyno comments but realistically - an RB25 with 270deg cams and 40psi pumped through it on E85 is going to make some serious power :)

What is the spool like?  There is no rpm scale on the dyno plot (NFI why people print plots like that), so a bit hard to tell.   Be very interesting to see how it goes at the strip, hope you have a decent trans! :D

 

4 hours ago, Lithium said:

Ha! That is ridiculous, nice work!  That's gotta be one of the more stout RB25 setups out there, being SAU people will probably make dyno comments but realistically - an RB25 with 270deg cams and 40psi pumped through it on E85 is going to make some serious power :)

What is the spool like?  There is no rpm scale on the dyno plot (NFI why people print plots like that), so a bit hard to tell.   Be very interesting to see how it goes at the strip, hope you have a decent trans! :D

 

Also very curious to know what the spool is like! Looks like it would be an absolute weapon, good job!

9 hours ago, feedmyfast said:

S1 RB25, Kelford 270 cams, supertech valve train (stock sized), CP pistons (stock bore and compression), Manley rods, balanced crank/ block. Otaku manifold, ID2000s

What turbine housing size - also single/split pulse + gate setup?

Perhaps drop something into the RB25 dyno results page

Strong result.

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

    • Don't "upload" the pictures. Just copy the picture direct from somewhere (I usually am pasting screenshots or something else that I have on the clipboard as an image, not as a file" and just paste it direct into the post editor. Just like you were pasting it into a Word doc or something. You can't damage something if you lift it where you are supposed to. If you look carefully at the correct jacking points, you will see that they are reinforced right there. And nowhere else. That is where the "foot" of the factory jack is supposed to sit. That's why you need rubber pads with slots. 10mm might not be deep enough. Note also that the slots are not required if the pinchweld has already been slammed flat. You could just lift it at the correct spot with a flat pad, because the damage is already done. No point in making worse though, if it is recoverable. IF. Yes, that's called a chassis rail. You can lift carefully on these, if you spread the load. A decent block of wood is good. But keep in mind what I said before. Any time you start doing this sort of thing, you are off the normal path and into "be bloody careful", because it is obviously not stable. Dumb. The refinforcement is already there. See above.
    • yeah looks like they've been lifted there previously but with solid not slitted rubber blocks. I'd just bend them back (combination of vice grips or hammer with some sort of drift, then hit the area with underbody protection paint. As for the siderails, I'd call those chassis rails and that is exactly what I meant about being careful with the balance point. You can probably lift off them at the point where the 2 pieces overlap, but you need to be careful with the forward balance of the car if you do when the engine is in....sills are a better choice. I guess you could weld some reinforcement in the sill area near the jacking points but it shouldn't be necessary if you use blocks with a slit. If you do want to reinforce it I'd use square section equal or taller than the seam and then just use flat rubber blocks for lifting
    • driver side sidemember and jacking point (looks the worst by far) driver side rear jack point passenger side sidemember and jack point passenger side rear jack point   Ignore my mug on the last photo. Turns out I was just too stupid to properly use the forum's attachment feature previously
    • Fk me, I guess next time I will try to use the onsite attachments feature. I find it hard to work with so far though because I can't move the images to where I want them to be. I will try to make a separate post with just images. As for lifting. The work I need to do for now involves the exhaust and engine mainly, so the arm covering the jacking points is not a problem. But I don't want to bend in the whole sill or underfloor by lifting the car at the original jack points. I found some rubber blocks, 125 by 125 with a 10mm wide and 10mm deep cutout, which I'm hoping will work for not hitting the jacking rail. The sidemember, as seen in the service manual, are the rectangular frame rails that come from the front of the car and go alongside the gearbox and downpipe. Those that get crushed inwards if you use them for a floorjack. They are already slightly bent in from being used to hoist by other people. I think cutting off the jacking points and welding or bolting on a reinforcement plate along the sill might not be a dumb idea. Or is it dumb?     A 2 post hoist is what I'm gonna work with, but not for any underbody work, just leaky engine and exhaust work so far. Depends on what else I find that might need immediate attention. For metalwork on the sills I think I'd just bring the car to a panel beater. What's your take on getting rid of the original jacking rails and putting reinforcement plates along the sills?
    • Yeah titanium always looks cool but I don't need that, just regular pipes would be fine. But I am really struggling to find any full hardpipe kit that is still for sale.
×
×
  • Create New...