Jump to content
SAU Community

Recommended Posts

hey Joel.....did you have to retard the exh gear to compensate and bring the power curve back to the left?

I'm abit confused, cause even though 9mm is not huge lift, when I went to school, bigger overlaps always caused a shift in rpm in a northerly direction.......maybe it's more to do with your tune than the cams cause I always thought that better response is not generally a side effect of bigger overlaps :blink:

:laughing-smiley-014: Back and to the left........

ahh ok.......sounds like an Ivan Tighe grind.

I though you may have been running a Poncam, HKS or similar cause they all run bigger overlaps than stockies

Tighe regrind it was.

I stumbled upon a list of HKS, Jun and LCA's but be buggered if I can find it.

I do remember the Rb20det's definitely had the same 110 and 115 LCA's when running in the 264 duration range.

Rb25's.. 115/115.

Tighe regrind it was.

I stumbled upon a list of HKS, Jun and LCA's but be buggered if I can find it.

I do remember the Rb20det's definitely had the same 110 and 115 LCA's when running in the 264 duration range.

Rb25's.. 115/115.

So would u recommend me get cams if I'm getting camgears, turbos, and injectors (and their support mods, fuel pump, water pump, afm, gaskets)... and if so, what type? I know nada about engine physics

-D

Cams always help make the power easier..

Don't overcam it. I was a little nervous 265's were a little too big but Shaun has had good results with that type of duration on fairly stock rb30det's previously so I went with his advice.

yeah we used to deal with Tighe Eng many years ago when I was still at Adelaide Eng, so I've considered going with one of his grinds as opposed to alot of the Jap stuff out there.

Good thing about them is that they don't just grind a second hand cam then end up with undersize lobes that have gone through the hardening process but instead they either start with a new billett or build up the lobes first. I find that alot of the jap grinds aren't really considering the average Joe that needs to drive to work through peak hour.

Sometimes I wish I still had access to our cam grinder and all the various masters that we had cupboards full of.

Guest
This topic is now closed to further replies.



  • Similar Content

  • Latest Posts

    • From the pictures I have when doing the job the flywheel is the same diameter, I don't think they're playing weird tricks like putting weights at the outer diameter to increase flywheel inertia or anything like that. The OEM flywheel is definitely heavier, but it's not a huge difference. Quoted weight savings of the clutch is 2 kg so I can't imagine the flywheel being lighter than ~7 kg. Kind of regret not weighing it before the clutch went into the car but as far as driveability goes I have no complaints.
    • HKS trigger kit should be very easy to integrate with a Link. It's a 36-2 crank trigger. Hard part is finding the motivation to take off the timing belt and everything on the front of the engine to install it. You also need to cut out a hole in the oil pump housing so the sensor can read the trigger wheel. Changing out the cam sensor for a 24 tooth setup is probably good enough but as others have mentioned depending on what underlying assumptions are changed it becomes more of a problem. Reading the crank state off of the cam is an abstraction that works in the general case, but if you have an edge case it makes less and less sense. There is a GTX2860 gen 2 that can take a compact 5 bolt housing so it's direct bolt on but I'm not 100% sure of what's involved. Peak compressor efficiency drops off a bit on these turbos vs -5s, 77% vs 73% but you get way, way wider region of operation. The -5s have a really strange surge line in their compressor map that is all over the place. If you think the hot side on the -5s aren't open enough you can try the Tomei T550B turbos which a local tuner seems to be happy with:
    • i need a complete tail light for my R33 GTR if you have please let me know.
    • I need a great maintenance workshop around Idaho, if you know one please let me know..
    • Hello friends, i have a good friend in Canada that looking for a good condition 1993 GTR around him please if one or know someone around you that is willing to let it go please let me know so that i can inform him.....Thanks
×
×
  • Create New...