Jump to content
SAU Community

Recommended Posts

phantom

when the block are bored we always make sure the run speed is low ie the bore tool moves slowly up and down the cylinder giving you a finely hatched pattern about roughly 25-35 degrees to the horizon if you where looking straight at the bore from inside. As my engine machinist has now aquirred a torque plate honer i will be using that from now on although the difference is minute its still ensuring the best possible result.

discopotato03

with standard rod and pistons you can run the standard headgasket and using the headgasket on foges with my experiece with arias will give you around 8.6:1 comperssion using the hightops with standard rods, using the flat tops i believe its below 8 around 7.4:1. However the eagle rods being chev arent actually the correct length they are 6 inch not 5.92 that standard rods are and the sit above the deck height enough that you will need at least a 1.2mm headgast to acheive a squish and avoid valve isssue when running bigger camshafts. All this info is based on the 26head but its pretty much the same if you are using a 25 head, but the 20 head is different, correct me if im wrong i believe the cc of the rb20 head is 63cc and the rb26 is 66cc so it changes it all right there.

phantom

when the block are bored we always make sure the run speed is low ie the bore tool moves slowly up and down the cylinder giving you a finely hatched pattern about roughly 25-35 degrees to the horizon if you where looking straight at the bore from inside. As my engine machinist has now aquirred a torque plate honer i will be using that from now on although the difference is minute its still ensuring the best possible result.

discopotato03

with standard rod and pistons you can run the standard headgasket and using the headgasket on foges with my experiece with arias will give you around 8.6:1 comperssion using the hightops with standard rods, using the flat tops i believe its below 8 around 7.4:1. However the eagle rods being chev arent actually the correct length they are 6 inch not 5.92 that standard rods are and the sit above the deck height enough that you will need at least a 1.2mm headgast to acheive a squish and avoid valve isssue when running bigger camshafts. All this info is based on the 26head but its pretty much the same if you are using a 25 head, but the 20 head is different, correct me if im wrong i believe the cc of the rb20 head is 63cc and the rb26 is 66cc so it changes it all right there.

Who is your machinist, does someone in Canberra have a torque plate now ?

  • 2 weeks later...

My appoligies for bringing up old stuff but I couldnt find any photos as most of the pics dont work anymore in older posts.

My engine builder hasnt seen my head yet but he tells me that the rb25det head rear passenger's side water jacket sits out past the block, the na rb25 head doesnt. I'm still scratching my head how he came to that conclusion when my head doesn't have this problem.

Now all kinds of thoughts are going through my head atm, do I have an NA head or are there variances in the 25 turbo heads, VVT is an obvious one (mines VVT) then I go on thinking do I have an na inlet manifold,cams and valve springs...:confused:

The pic below is my bare head, the orange arrow is where i've been told the problem is.

12979rbhead.jpg

The complete top end came off a 33 gtst so I would assume it would be a turbo head.

In the past replies SK and Joel have used na heads, what are the characteristics of the na cams on the new engine? any problems with reversion etc....

Cause if I'm stuck with na valve springs etc..:slap: it maybe time for tomei pon cams and stiffer springs.

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

    • The 296mm rotors are the R33 turbo brakes. The 310mm rotors are the R34 turbo brakes. The calipers are nearly the same, but not. They're the same caliper but the R34 caliper has longer legs so that it sits out far enough to go over the rotor. The pads are the same for both. When you say, "I bough tsome EBC"....did you just mean pads? Or rotors? 310mm rotors fit under 17" wheels. There may be some wheels without enough clearance though. I can't fit my fingers between the barrel of my wheel and the "corners" of my R34 calipers, but there is plenty of room behind the spokes. This is on Enkei RPF1. You can fit 324mm rotors inside a 17" wheel, but I'd be willing to bet that it would be close to impossible with the Nissan/Sumitomo caliper (using an adapter, of course), because the Sumitomo caliper is fatter than the Brembo caliper that is supposed to go on the 324mm rotors.
    • Hi. Can someone tell me what brakes(and mainly WHERE) can i buy brakes on R34 GTT? I bought some EBC which SHOULD go on my car(i have GT but it has GTT brakes) but it does not fit, Brakes are "too" small(296mm) Are 310mm be good or? I have 17 inch wheel so no "big boys" but for me driving i just need one that fits and i can get here in EU/Czech.
    • Since winter isn't that harsh anymore in Poland, i will definetely drive it 365 days a year 😉. But if the snow hits i will try it for sure and let U know. Only swap i am planning to do is of course R34 GTR front 😍.
    • Hey. Very valuable information about pitwork, I will pay attention when buying any consumable parts 🙏 As for the carpets - I got a handful of information from nengun, from which it appears that indeed the carpets for the driver's side are OEM. They are not able to show me any pictures due to the long chain of different sales entities but after I place the order, as soon as the goods arrive at the nengun warehouse from which they will send the shipment to me they can send me photos and if my purchase differs from OEM I can immediately return it / cancel the purchase. I think I will give it a try 😉. Of course i'll let you know what's what as soon as i get them P.s. I know the topic is not relevant to the thread, but both nengun and amayama have these SICK 😍 trunk room lamps available. Do you know anyone who ordered them? I need to have one in my car
    • I've managed to find this: Nissan_Stagea_AutechVersion260RS (1).pdf
×
×
  • Create New...