evil angel

if the Tial operates the same as the netics, or better, i might consider it "due to the price difference". though i need some tech support. i'll contact Tial tech support. and i'll appreciate any suggestion from you guys "especially those who have experince with it". regards.

Thanks mates for passing by and reply. STR8E180, it seems that you have experience with the Tial WG. what can you tell me about them? i mean, why do you recommend the Tial? which size would be suitable for my setup? i've been told that the Tial 44 would be ok with my setup, but i rather gather more information before installation. and how does the Tial sound on that range of boost?

Hi, I'm in the stage of choosing a wastegate for my ride, and I would appreciate your feedback about this product: Turbonetics NewGen wastegate. how good is it? how does it sound like on high boost "around 1.7 bar" would you recommend it over other competitor brands "with the same price range" information about my car: GTR BNR32 RB26 Turbonetics GTK 850 "not fitted yet" my aim is to go 1.7 - 1.8 bar, to achieve around 650 - 700 whp. there is another wastegate by Turbonetics, which is the Racegate version: it's said that it can handle up to 900 hp, but it looks small to me !! what do you think? regards,

good to hear that. but, what about the MAFs ? they won't function well on 700 HP range. is there any idea that could help? thanks

this is a great thread, i've been thinking alot of this ECU, but i was wondering of the way to remove MAFs. ok, to use the Greddy pressure sensor is a solution. but if i'm planning to build a 700 HP engine, how can i use the Greddy pressure sensor in that situaton? i mean, MAFs are good up to around 500 HP on a RB26DETT as far as i know, so can i use the pressure sensor with the MAFs on a 700 HP enigine? MAFs should be replaced with bigger ones on that range of power! another question here, for those burned down coils, would i have the same potential problem if i use the EMU in a GT-R R32 ? are there any wires to be swaped or joined together in any harness on a GTR ? your help is highly appreciated here. thanks Trent

great info URAS, thanks a lot. after reading the above report , i think i'll use the clay method. this is because i'll take these measurments in order to choose the right gasket, so i'll do it with the old gasket and i'll have to remove the head again no matter which method of the two i use. but i'll have to wait until the clay is dry, right? and maybe i'll use the spring method when i install bigger cams in the future (if i can apply that method, that is). i'm not worried about the intake stroke, i'm worried about the exhaust stroke rather. because the valve would be going down, while the piston is going up. i realy appreciate your help all of you mates. i'll try to do the measurements after few weeks (as we work carefully on the engine - no rush) and i'll let you know about the resolts.

yeah but, i've measured a new genuine Nissan head gasket (imported from Japan), and it is about 1.3 mm thick!! so 1.2 should at least maintain the same CR as the STD if the genuine gasket would be pressed to about 1.2 mm after applying enough torque to the head's bolts! by the way, it is mentioned by Tomei that the 1.2mm gasket would results a 8.5:1 CR, which is the same as STD!

ok that could work, but it won't be 100% accurate. I mean, it is too hard to calculate the difference between the blu-tac before and after (because it's gonna shrink when it is dry). then, to calculate how far the pistons & rods might expand with heat! it's really a very complicated equation; but, it might help thanks URAS for your contribution. it would be a great idea if we have talent engine builders where we live . I would do exactly like what you said. but we don't have that kind of people, i'm not from Australia so, I have to have the knowledge and tell the mechanic exactly what i want, and he do as i say! believe me, i've seen so many bad examples of upgraded RB26's. ok, here is what i did. i'm done with boring the engine cylinder. and toke the head to workshop for refacing. the technician there told me that it's not the first time for that head to be refaced. well, i don't know how much had been remved from the head in the first reface, but i've measured the old Metal Head Gasket, and i found it about 1.2mm. now, only about 5 thous have been removed in the second reface. so, i guess 1.2 mm MHG won't be a problem. but 1.0 mm might not fit (for valve & piston contact issue). i'll go with the 1.2 mm. this way i should have more than 8.5:1 CR (theoritically that is) by the way, I think that the head was ported before, but i'm not sure. that explains why my car was little bit lazy with stock turbos. can nayone tell if it's ported or not if i post a picture of the head? what part of the head you would like to check in the picture? would like to hear from you guyz. cheers

good to hear that, if this is the case, that mean i would be able to go with the 1.0 mm gasket with no problem. since the final calculation will be about 30 thou clearance which have been said - in older topics - to be a safe clearance. 1.0 mm = 40 thou. 40 - 10 = 30 thou. ok, i'll have to do the facing b4 deciding on the gasket thickness, anyone have ideas about the potential CR with 30 thou clearance? thanks

10:1 CR, this will definitly need top $ pistons. really amazing though. i'll try to e-mail Croydon, if i receive any info, i'll post them up. thanks Slim Mat

mmmmm, i've never put that into consideration. it's good to know that mate. well, it's good that we both have the same interest :sorcerer: , we might get use of the research here. for the long duration cam, is a 264 considered to be a long duration cam?? ok, theoretically, CP pistons is supposed to produce a CR of 8.5:1 (as mentioned in the CP web site). so this is the same as STD CR. on the other hand, Tomei MHG 1.2mm is supposed to provide a CR of 8.5:1, and this is the same as STD too. if i install those pistons, with the 1.2mm gasket, i - in theory - should get a STD CR (8.5:1) and if a facing is done to the head, the CR will get up a little bit, am i right? it is mentioned that a MHG of 1.0 mm will give a CR of 8.7:1, so if i manage to remove only 0.2 mm from the head, and install the 1.2 mm MHG, the result should be 8.7:1, which i think is good. do you agree guys? how much usually they remove from the head when doing refacing? thanks for your contribution here, any other openions are welcomed.

thanks a lot Adriano, ok, honstly i don't know what the dummy assembly is. but, any info about the std head gasket thickness would help a lot. if i know the thickness of the std gasket, and the thickness of the metal head gasket + how much will be removed from the head. this equation will help to know the difference between "before and after"! i mean, i'll be able to know how many thous are left there. regards.

Hi all, this is my first post in this great forum, but it's not my first visit i've searched for tech information about RB26 but i found many topics about conversion between RBs and so on. anyway, i'm building my RB26 for my GTR R32, and i'm looking to make 600 awhp. now, i've ordered a set of CP pistons (87.0 mm), Eagle rods (H beam, with ARP bolts), ARP Bolts and Studs set (for head and main). but i'm confused which thickness should i use for the metal head gasket. i've made modification on the std crank shaft (bigger bearings and Jun collar) i'll install a Jun oil pump, and complete set of gaskets. my questions are: 1- what is the std CR for RB26? 2- what is the std piston to head clearance? and what is the minimum i should stick with? 3- can i go with Tomei (1.0 mm) MHG (after refacing the head) ? 4- would it cause a problem with Cam setting? (thinking of Tomei 264) this because i'm trying to maintain a high CR (to prevent lag) and at the same time, i'm worry about contact between pistons and valves! so, what thickness shall I go with? my aim is to build a street car at the first place.