neofenrir34

The spool speed of the turbo is helped because of the increased efficiency of the intake system. As for the mid range torque i haven't had much experiance with that on RB engines but from other types of engines that i have seen, a decent tune will correct most loss if any. That is all mainly due to the fact of the engine tune not being able to use the air it is getting effectively.

Runner length is only really a noticeable thing on NA powered cars where the the length and shape of the runners, speed or slow the airflow through them. In a force induction type of vehicle it has only a mild effect because the air is getting forced into the engine under pressure. In big power applications well designed runners on turbo charged cars will help with efficiency but lets face it most of us will come no where close to having to worry about it that much. Hope that helps

looks to be some good work. do you allow for the IACV?

they can make them but they prefer to have the car so that they can makes sure for sure that it will bolt straight up, they are fully custom units. Still around the same price from last i checked then

far enough all fairly reasonable. Best response i have had so far. i am trying to steer clear of the plasmaman option as it will most likely cause the plenum to foul on the bonnet.

At the moment stock. But as soon as i can get this all planned out, it will be mated to a GT3582R and a custom intercooler with a Greddy core, managed by a haltech platinum sport 2000. I am also in the middle of selecting the cams.

i have been thinking about it that way also. That is one of the reasons for topic

Yes hypertune have awesome inlet manifolds the R&D put into them is unbelievable. they can custom make one with no problems there, but the cost would be most likely be more then i am looking to spend, plus they like to have the car to do it. It is a shame really.

OK yeah i can see how it reads like that, i am sorry for that. It is not how i meant it to read. My statement about Garrets calculations was in regards to it being possible power that could be gained, at the levels i am talking about it isn't really practical even worrying about. The gains i am chasing are more on the side of increased efficiency within the entire turbo and intake system resulting in increase response, it is not like i am chasing that small amount of extra psi, after all that 1psi extra is more then a acceptable loss All systems have restrictions and it is true that the main cause is the cooler core itself but it can also result from piping. Again i apologize for the ill worded posts Although i do believe we have been caught up in a off topic discussion.

thanks i would be interested to know how this works out after a good tune

Well it can vary depending on the system but .5 is conservative average.

I never said anything about gaining more power just by putting a forward facing inlet. My main point is gaining over all throttle response (and please don't start talking about dyno charts and torque curves, they tell nothing about the efficiency of the intake and turbo systems, only power levels unless you have full data logging and do a variety of tests) You would be surprised about how much pressure is lost from the turbo to the inlet (2psi quite a normal loss, is some cases 4psi is not unheard of). The bends reduce response of the engine and at higher boost levels cause bigger problems. I am not so worried about torque levels a low rpm, in most cases with correct tuning and supporting mods this can be adjusted to minimize losses in that area. I am well aware of the effects of inlet runner lengths (venturi effects) and how these things effect the engine power and torque curves My main question is has any one fitted One of these PnT performance "JUN" style ebay inlet manifolds and had success? That is what i am asking.

Ok now i have seen that this has been covered in a few threads before but the most recent one i could find was late last year. So here is what i Have, 1998 R34 GT-t with a RB25DET Neo motor What i am after, A forward facing Inlet manifold in similar styling to a GT-R version. Reason being that i refuse to run the intercooler piping back across the engine into the standard inlet plenum. (FYI every 90 degree bend is worth at least 1.3m of piping and a pressure drop of about .5psi on average. if you have seen the garret calculation that works out to be a fair bit of power over all) I am not so worried about the flow rates of the manifold/runners as long as it is as good as the stock one (if not better) OK so i have heard of a lot of people cutting the runners and just welding on a GT-R plenum, i am trying to steer clear of that option if i can.I also know someone that can fabricate a complete manifold if i want so that is also a option. but i would prefer it to be a more straight forward thing if i can. I have Seen on Ebay a inlet from PnT performance in the style that i am after. http://cgi.ebay.com.au/R34-skyline-RB25DET...=item27b2ae94d6 The questions i have are. 1. Has anyone used one of these? 2. If so has there been any fitting dramas at all. like having to alter where the battery sits? (i don't mind having to re-route hoses or wiring) 3. has there been any failure's? what was the cause? if i have missed anything that you wanna know (like my plans for the car or exactly what i am chasing) please let me know.

Part No. 30537-40P00. Only seem to be one option for a RB26 engine in a R32

part No. 11927-42L02. idler for AC belt