Jump to content
SAU Community

Recommended Posts

  • Replies 103
  • Created
  • Last Reply

Top Posters In This Topic

 

Are they both using the same turbo's?

 

Obviously if a turbo is at the edge of its efficiency then a set of cams will do wonders, cams reduce the amount of boost required to flow x amount of air.

 

To make more power you can either use a larger laggier turbo or start looking in to improving air flow in to the pots.

No, there not using the same turbo, I have a GT30, and robs is the TD06. Even he will agree that his is laggier than mine.

The point that we were trying to make is that SK comment

My experience has been that the standard camshafts are the most likely first limiter over 250 rwkw. They simply don't have enough lift or duration to let the air into the engine. Sure you can turn the boost up and try and squeeze some more air in, but you will get higher inlet air temps and lower efficiency.

doesn't always hold true. On stock cams mine has made 330rwkw and still hasn't fallen off at 8000rpm. That's not to suggest that most RB25's don't do what SK suggests though, but cams may not be the only restriction.

I haven't had any port work done yet. just want to see how far I can go with the stock cams.

and its still using standard injectors and cams?

We're using GTR injectors now, although we could have got the stockies to this level, we knew that seeing as we're pushing for 500rwhp that they wouldn't last. Just need to fit an 044 pump as I'm sucking the pump dry:(

GTS-t Vspec,

You are definately missing out on not having some higher lift/longer duration cams in your engine. You will make more power and the inlet temps will not be as high, it's just physics. There are always two ways to make good power. So far you have chosen the hard way trying to see how much power you can make on standard cams. For the rather small outlay you could pick up so much performance. I'd like to see you crack a 12 second pass, you've been waiting so long for it so I reckon you should treat yourself to some nice camshafts :P

GTS-t Vspec,

You are definately missing out on not having some higher lift/longer duration cams in your engine. You will make more power and the inlet temps will not be as high, it's just physics. There are always two ways to make good power. So far you have chosen the hard way trying to see how much power you can make on standard cams. For the rather small outlay you could pick up so much performance. I'd like to see you crack a 12 second pass, you've been waiting so long for it so I reckon you should treat yourself to some nice camshafts :(

Dave, Sure I could put a set of cams in, and make alot more power, but I just wanted to show that it's not necessary to make decent power and not run out of puff at 6500rpm. I'll do an 11sec pass with stock cams just for you;)

Dave, Sure I could put a set of cams in, and make alot more power, but I just wanted to show that it's not necessary to make decent power and not run out of puff at 6500rpm. I'll do an 11sec pass with stock cams just for you;)

You go for it, it's not the way I would do it. But hell, give it a go, maybe you will be the first person in the world to do an 11 on standard cams. :( I really don't know whether anyone else has ever done it. I do know a black R34 GTT that did an 11.6 with 50 bhp less than you. But it had 260 Tomei Poncams in it, so it doesn't count.

But on to more serious matters...

the engine had only been rebuilt 2 days earlier

What happened?

I have no doubt of its potential.

I cant pull on it with 4 people in my car yet i can easily walk away from other reasonably quick cars(low 13's etc) as if they standing still.. once again with a full load.

What speculation you want on his HP.. if you'd see it you'd believe it.

THing is Sydneykid is we have cars out there,You rewrite other PPLs storys as your own.

Facts Steve, I only deal in facts. And the fact here is the R34 GTT did an 11.6 with 50 bhp less. Whether I wrote the story or someone else did is irrelevant.

i seem to recall use of slicks.. and bits breaking..

Yep summoner 50% correct, my suspension set up got the traction and squat so good that a driveshaft became the weakest link. But the fastest run was on Nitto's, not slicks.

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

    • After my last update, I went ahead with cleaning and restoring the entire fuel system. This included removing the tank and cleaning it with the Beyond Balistics solution, power washing it multiple times, drying it thoroughly, rinsing with IPA, drying again with heat gun and compressed air. Also, cleaning out the lines, fuel rail, and replacing the fuel pump with an OEM-style one. During the cleaning process, I replaced several hoses - including the breather hose on the fuel tank, which turned out to be the cause of the earlier fuel leak. This is what the old fuel filter looked like: Fuel tank before cleaning: Dirty Fuel Tank.mp4   Fuel tank after cleaning (some staining remains): Clean Fuel Tank.mp4 Both the OEM 270cc and new DeatschWerks 550cc injectors were cleaned professionally by a shop. Before reassembling everything, I tested the fuel flow by running the pump output into a container at the fuel filter location - flow looked good. I then fitted the new fuel filter and reassembled the rest of the system. Fuel Flow Test.mp4 Test 1 - 550cc injectors Ran the new fuel pump with its supplied diagonal strainer (different from OEM’s flat strainer) and my 550cc injectors using the same resized-injector map I had successfully used before. At first, it idled roughly and stalled when I applied throttle. Checked the spark plugs and found that they were fouled with carbon (likely from the earlier overly rich running when the injectors were clogged). After cleaning the plugs, the car started fine. However, it would only idle for 30–60 seconds before stalling, and while driving it would feel like a “fuel cut” after a few seconds - though it wouldn’t fully stall. Test 2 – Strainer swap Suspecting the diagonal strainer might not be reaching the tank bottom, I swapped it for the original flat strainer and filled the tank with ~45L of fuel. The issue persisted exactly the same. Test 3 – OEM injectors To eliminate tuning variables, I reinstalled the OEM 270cc injectors and reverted to the original map. Cleaned the spark plugs again just in-case. The stalling and “fuel cut” still remained.   At this stage, I suspect an intermittent power or connection fault at the fuel pump hanger, caused during the cleaning process. This has led me to look into getting Frenchy’s fuel hanger and replacing the unit entirely. TL;DR: Cleaned and restored the fuel system (tank, lines, rail, pump). Tested 550cc injectors with the same resized-injector map as before, but the car stalls at idle and experiences what feels like “fuel cut” after a few seconds of driving. Swapped back to OEM injectors with original map to rule out tuning, but the issue persists. Now suspecting an intermittent power or connection fault at the fuel pump hanger, possibly cause by the cleaning process.  
    • For race cars, this is one part where I find having the roll cage bar having gone through a hole in the floor better than the build it up on a ledge inside... The Merc I help on, the main hoop ends are marked on the car, and the jack is marked... Jack goes under a few inches and lifts one whole side of the car up... Removes that fight for long slim jacks for race car duties!   My biggest issue for the daily drivers I work on, is my jacks don't go high enough. The jacks start out on a few blocks, jack it up, then start a second jack under it on more blocks, and then I can get an axle stand under it. My axle stands are presently in use, and are nearly fully extended. The car is sitting with barely more than a cm of clearance to get the wheel off the studs! Sarah's Kluger is the same, as it has an ungodly amount of droop available in the suspension and a distinct lack of good jacking points!
    • Happy? Yep, my to do list is getting shorter and shorter. Either this light approaching is the end of the tunnel, or I'm about to be hit by a train... Ha ha ha   Also, Duncan isn't that far out of town that you need to make a multi day drive out of it. 😛
    • Sorry I meant that we are building the EH for a client.
    • LOL, when one "money pit" is never enough Noice, and excellent work mate
×
×
  • Create New...