lcxu105

I'm looking to make about 550rwhp and its a gtx3582r not a gt3582

Its a .82 rear on the gtx3582r. If I can feed more boost into it I will. Being that the engine is in a lc gtr torana that is only 1000 kgs I'm not to worried about it off boost. Due to the fact that the 30 bottom end will produce more torque than the 25 neo it should be fine.

Ok. To start with this engine is in a lc gtr torana. So it's fairly tight in the engine bay. Pic of engine bay is old setup 25neo I'm about to get my head back for my 30 25 neo and need some help pointing me in the right direction on a couple of questions at the end of the post. But first I will give you a full spec list of the setup. Specs are 30 block Crank welded and modified for 25 oil pump All resized and nitrared so as new. Spool h beam rods arp bolts ARP main and head studs. 87mm Forged arias pistons -10.4cc Zero deck height Jim berry modified clutch 4200 pound clamp N1 oil pump N1 water pump. 2 x 1mm oil restrictors 1.3mm mls head gasket Head has exturnal vct mod -3 lines. Ported inlet and exhaust performance valve springs and type b pon cams. Head cc is decked to 49cc Giving me a 8.5 to 1 comp Freddie intake manifold match ported 1000cc bosch injectors e85 compatible Walbro 460 intank pump. Custom made steam pipe exhaust manifold hi mount Gtx3582r with 45mm exturnal gate off exhaust housing. Running 22 to 24psi for pump 98 3 inch from turbo back exhaust 100 cel cat straight through muffler. The only thing that will be holding it back is I only have a r34gtt Nistune ecu with hpx1 afm at the moment. I have read several post on here about cam timing and still haven't heard of anyone getting the best setup or no one is willing to let on. I'm also not sure if I should dump my spitfire coil packs in favor of ls9 truck ones. Also not sure if I should dump the factory cas for a rossi cas trigger.

Any updates on this yet?

Stripped the inlet manifold and ported it cleaned it up and gave it a going over with wrinkle paint. Didn't come up to bad for my first ever try at it.

What size oil feed is needed for the exturnal oil feed for the neo vct to work. I'm installing a -3 in mine do I need a restrictor or not.? Will the -3 be big enough?

Hi everyone. Just getting my head modified to fit the 30 bottom end. I was just going to run a -3 fitting. Want to know if the hole in the -3 fitting is big enough.

Is a -3 fitting big enough to feed the vct on a neo head?

Has anyone else ported their inlet manifold. Did mine tonight. Went in about 90mm and opened it up to the same size as the gasket. Also opened up around the injector feed area to aid fuel atomization. Head is ported the same. Curious what sort of gains people have had.

Well bottom end is together and the head is at the machine shop for some valve springs and port work. Should have it back next week. Hopefully will be in the car by the end of the month. Fingers crossed

Spoke with them this arvo. They where spinning their engine ove 8500 rpm. So with that turbo those revs they kind of speek for themselves.

Well spoken with the manufacturer of performance springs direct. Has Never had bad feed back about the springs and told me they even supply to some top end car manufacturers. I think I will give them a go

I'm only going to be running 22psi with a gtx3582r. Interesting.

For everyone. Supertech don't do a spring for the neo. Only way to use supertech valve springs is to change valves as well. Straight from Jim at the only supplier in Australia.

I thought that was for the 33 head with solid lifter conversion

Has anyone got a link to the supertech valve springs for the neo head please

Don't understand why people keep saying Brian Crower he does not even do a part for the RB25 Neo. Only has RB 26 listed on his web page. Supertech don't list them for a neo either.

Probably just want me to spend twice as much for their setup.

Was only asking as I spoke with JHH cylinder head engineering and they said not to use them as they break.

Type b poncams 260 9.15. 8.5 to 1 comp.

Can admin move post to forced profamance please

Eg what boost they can handle and lift.

Hi everyone. Looking at fitting performance valve springs in my 25 30 neo. Just wanted to know what everyone thinks of them any experience that anyone has had with them. Can't seem to find much info of them on the net.

So the LQ9 ones.