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Hi guys Just about to order Rays TE37 ultra through Jesse streeter and not sure is the standard "flush" profile centre caps will fit r34 gtr or do I need high profile? Thanks in advance

Interested in CST hyper zero 18x9.5 +15

Hi guys Thought you'd like to hear the results of the valve springs situation. Changed out the performance springs for the supertech kit. This was the only change and it went back on the dyno and the same place. As you can see in the dyno graph the springs made a noticeable improvement. Thanks to everyone for their input.

Thanks for the input guys. I'm gonna change to super tech springs and test them out.

Standard camshafts I can't notice anything driving it, I believe the tuner has turned it down as not to damage anything. His words were he'd seen the same situation many times before with this brand of spring.

I see, if there is a better option feel free to let me know. The tuner recommended super tech, from doing a search it seems they only make a single spring to suit hydraulic rb25 part no. SPRK-2081/rb25 Ferrea do a dual spring for hydraulic with slightly better specs part no. S10112-24 Would either of this be the right choice?

Was just trying to gauge the difference in performance by changing the springs. Just need to weigh up the options with my goals. Would like to reach 500hp. Replace springs and retune Replace springs and cams and retune Replace springs and turbo to GTX ???

Who has big boost setups on rb25 with hydraulic lifters? And what springs do you use?

That's very interesting Brett, thanks for you input. If you can remember, how big were the gains on the setups you seen? Would changing to higher lift camshafts help with the spring situation?

Yeah head reconditioned when gasket and studs installed. No porting done. Had the springs installed with the head on.

It's a rb25 series 1 I agree that the curve doesn't show a typical valve float situation. The tuner stated that as he tried adding boost in the higher rpm range the curve stayed the same as you can see in the graph. He said swapping the springs for supertech would fix it and show a big increase in power. I'm just skeptical having already spent a bit of coin.

Had a graph of a pressure drop test they did in the dyno to check for restrictions only 1psi drop

I've recently converted my skyline to united e85. Had the car tuned and the result was 410hp at 18psi. The tuner had stated that he couldn't put any more boost in because of valve float. So I had some performance springs valve springs installed. Had the car retuned and the result was 437hp at 23/22psi The tuner had stated that the car still had valve float above this level. He asked what springs installed and commented that they're not up to the task and had seen many customers have similar problems. Raising the boost would not effect the power curve and estimated power figure not reached. I'm disappointed with the situation and would like to know what you guys think? Should I change springs again? Should I change dyno operator? Is this a below average outcome for my setup? Is this valve floating? Mods include but not limited too: Garrett Gt3076r t3 .70 comp .82ar ex wg 3.5 inch exhaust 100mm thick cooler 3in piping China ffp Standard throttle body Walbro 460 Id1000 Mls head gasket Wolf 3d v5

Sorry to wake this thread up, just finished reading it all and have to say thanks for the information. Has any of the builds in progress from last year come to any results? Has anyone got specific results on rb25 hta3076 with hydraulic head? Cheers

Price drop 6.5k

Still for sale

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For sale Rb25/30 brand new never fitted to car or started, only cam gears are 2nd hand Block Machined blueprinted and painted Je 86.5mm forged pistons Shotpeened rods Acl bearings N1 oil pump New water pump Rwd sump Orc super single Oil restrictors New dayco timing gear Ross tuffbond pulley Metal head gasket Reco cylinder head Skim clean valve guides debur blocked oil feed Kelford cams Hks cam gears Gtr rocker covers Front facing plenum 80mm throttle body Currently have the head off, was going to upgrade to arp head studs but now it's up for sale. Easier to inspect as is, can have arp bolts fitted and everything assembly at buyers discretion. Can organise postage on buyers behalf or viewing in wynnum Queensland. Contact 0435790841 Message for more photos as most are to large to upload thanks $7.5k

Any lower on price ?

Also keen on datalogit

Where you located? Text me on 0435790841

Sorry to revive this excellent thread but one quick question Is it still necessary to enlarge the block oil returns and restrict the block feed orifices when running dry sump setup? Obviously enlarged returns will benefit no matter but if the engine is already assembled then how much off a disadvantage will it be on dry sump setup? Thanks

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Ebay listing I ended as didn't reach reserve price of 5500, highest bidder 4855

3 days to go