r33_racer

Yeh twincharging would be the way to go. One of the 2.8L jobs to get you to about 800-900hp and then throw a 2000hp turbo of some kind to take over. I can envisage big power with not so terrible amounts of lag. Would just be a nice big painful experience fitting it all in and engineering it so it works nice. StockyMcstock did it ages ago and I was fortunate enough to go for a spin in it and it was insane. Though it wasnt that exact combination. I think it was a small eatons with a gt40 on a fandangled steampipe manifold he made himself. It is a fancy setup and worked a treat! It was damp or rainy that morning and it was quite loose! I should make a fancy coil pack cover with the new designation on it....mmmmm Cheers for the idea Will! Yeh ive seen that video and the whole build thread on the GTR UK forums and on a couple of others they posted it on. It was their build that inspired me to actually look into this in the first place. Abit of research into these superchargers and I got sucked right in!

lol stupid thing. RB25DE[ R ]

RB25DE ®!

Thanks Will! There is a shitload of welding involved in that intake/tb setup. If i were doing it again I would do more research into seeing if I could run it as you say to save the amount of fab work involved in it. Im not sure on the designation for it, but I think Duncan mentioned it back on the first page. I think the counter driven screw is 1.5 times the driven screw. Well one shaft has 4 lobes and the other 6 from memory, but will have to check that.

Thanks. Lol I know. Im pretty damn keen to hear it too. Did abit more tonight. I welded in my boost control valve and then started on my fuel system. I got the surge tank fabricated with -8 fittings. I cut a mounting plate for it and the pumps also. Then the nights over and that was about 3.5 hrs worth.

Nothing in performance engineering ever is....But its worth it! Great to hear the tear down looked good. Cant wait to see the results!

Got the intake fully welded, still needs to be cleaned up inside though. Welded in pipe for the bypass valve on intake side and welded bypass valve plate to supercharger outlet. Did some dummy fitting with radiator and shroud to make sure it all fits ok. Everything is looking good so far! Still got the boost control valve to go in and gotta sikaflex in the afm and then hopefully I will be starting the exhaust! If all goes to plan I should have all my mandrel bends made by the end of the week. Fingers crossed! That is sort of what it looks like now.

Thanks for the clarification! Stock bottom end should be fine. Is it just your usual i/c piping misalignment thats letting it pop off? Or is it custom made and fab'd slightly off?

What exactly was the problem? Ive read through it all a couple of times, but I couldnt decipher what the exact cause was??? Was it timing belt mark alignment, cam gear setting, or CAS? Or something else i missed?

Yeh I read my supercharger book again and its informed me you need the bypass and throttle setup in that position so at idle and light throttle, where there is no boost the bypass lets air skip past the supercharger or else the supercharger just heats up the air and attached piping/ic unnecessarily which is no good for when you do put your foot down as there is alot of residual heat which shouldnt be there. It did also mention that throttle response is slightly dulled, but apparently its not that bad. Im not totally positive why you couldnt just leave it in its std spot and then just have the bypass setup so it still does its job properly. But Im not an expert on this either, so I just did what was suggested to me by people who are and hopefully their advice works.

Absolutely amazing build! I almost want to buy an s14 just to put your conversion kit in it! Loving the work! I hope it all works out way better then expected!

Thanks for the info!

Yeh thats correct. You join the two grounds together to form one.

Nice build mate. Go the 33 gtsts!

Weve run both on our race car with identical setups as a back to back comp. Done at mercury a good 2-3 years ago now. We picked up a good couple hundred rpm in the midrange and more power with not much change in the top end. Currently run the plasmaman plenum, though I do have a greddy on my raod car.

That trick is commonly done in all kinds of motors and has been around for ages. Nothing wrong with it when done properly, though its more so for old cast iron heads that dont have a "pressed/insert type" valve guide, the guide is the hole in the head itself and once flogged out, it gets drilled and a new guide, most commonly made of bronze(alu or phospher bronze) is pressed or threaded in and then reamed to suit. If they do that on most motors, then they should be able to just remove your old ones and press in your new ones (whether std cast iron from nissan or aftermarket bronze type) and then ream/hone/cut seats and valves to suit and check lash.

Thanks Yeh thats very possible. My old man has suggested the same idea and I have mulled it over myself. I guess I will find out when its done. Initially I was planning on leaving the TB in its standard position. However Sprintex told me I should put it before the supercharger and various books and info ive come across have told me the samething. Hopefully they are right and its in an ideal/optimum spot.

Easter break was utterly hopeless. Got next to nothing done. But I do hope everyone had a great break! However, intake is fully tacked together right upto throttle body flange. So a couple of hours of welding and abit of cleaning up and it will be done! It was quite difficult and as a result very time consuming/frustrating. Just the pipework for this intake to get upto this point now is something silly like 15hrs. Could very well be a 20hr long item by the time its fully done. Oval pipework which reduces in size is a royal PITA! It steps down from 4" to 2.5" in that last stretch to suit the throttle body flange. Some more good news I should be getting the new 1000cc ID injectors and 2 x 044 pumps delivered tomorrow hoorah!

Trents on fire!

Remove plugs as well. Takes the compressive load off the pistons, bearings and starter motor.

I will do that. Will be very interesting to see the torque and hp differences at various rpm. More so the down low difference. Maybe the superhcarger will turn the 25 in to a 30

Marko how is the Nitto oil pump going for you? What sort of oil pressures do you see hot?

dubzzzz

+1

So I got a couple more pictures. Some of an adapter so I can run my standard TPS on the new billet v8 throttle body. The picture wont show the TPS as I left it at work. But its bascially an extended drive that slips over the throttle bodies one and the aluminium adapter plate sits around it so the std TPS can bolt on top and be driven by the new extension. Looks pretty damn good and saved me finding a ford style tps and wiring it in. Tonight I got a little bit of the intake done. Ran into problems with it at the start. Couldnt run it at the intended width as it was going to leave almost next to no room to run cylinder 2 and 3 primaries out and up. So the way its made now should solve that. Tomorrow is another day and hopefully I will get the intake done. Well its after 1am, so perhaps today!