hefer81 Posted November 10, 2005 Share Posted November 10, 2005 There's some guy on calaisturbo trying to flog off an N/A Rb25 head if people are looking, he only wants a few hundred dollars for it! <{POST_SNAPBACK}> gday i am wondering what sort of prices engine machining cost to you guys when undertaking the rb30 conversion namely acid bath, bore, honing, decking, and grind and balance crank Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1703836 Share on other sites More sharing options...
drunkenmaster Posted November 10, 2005 Share Posted November 10, 2005 Quick simple question, didnt want to cramp this thread but wasnt sure where to ask: Are these these RB25DET transmission supports suitable for the RB30 block? If so, can I pull them off any RB30 powered car at the wreckers? I seem to be missing them. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1703874 Share on other sites More sharing options...
[200] Posted November 10, 2005 Share Posted November 10, 2005 Can someone help me with this? My Webpage Just want to know if this block is the right one to use? Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1704151 Share on other sites More sharing options...
GTR-Ben Posted November 13, 2005 Share Posted November 13, 2005 Quick simple question, didnt want to cramp this thread but wasnt sure where to ask:Are these these RB25DET transmission supports suitable for the RB30 block? If so, can I pull them off any RB30 powered car at the wreckers? I seem to be missing them. <{POST_SNAPBACK}> I think you will need to use the RB30 gearbox supports. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1709682 Share on other sites More sharing options...
Cubes Posted November 14, 2005 Share Posted November 14, 2005 (edited) The R32 RB20DET Transmission supports are suitable for the RB30 -> RB20DET/RB25DET gearbox. Hows your little monster coming along Ben? Bu5ter is running 272duration cams in his RB30DET, the same as you I believe? Edited November 14, 2005 by Cubes Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1711645 Share on other sites More sharing options...
MarkE Posted November 14, 2005 Share Posted November 14, 2005 I've noticed several people are running Mitsubishi TD06-20g's and pushing ~250RWKW+ on ~1 bar - what are the specs on these things like? Im guessing they are rather large? Seeing as people are running as high as 270RWKW on internally stock RB25DETs, what are thoughts on similar power outputs on RB30DETs? Im also curious as to the limits of an internally stock bottom-end. Im looking at getting the head ported, I have some RB26 valve springs to go in, maybe some bigger cams, stock exhaust manifold (sandblasted/beadblasted?) and then a decent exhaust. Turbo wise im thinking perhaps GT30R with .63 A/R? Either that or spend the dollars on forged pistons and rods, and go a GT3540R with .82 A/R? Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1712086 Share on other sites More sharing options...
sky30 Posted November 15, 2005 Share Posted November 15, 2005 My Engine has made 312RWKW on completely stock bottom end ( the engine had 270,000km when i put it in my car). Has been running for about a year now, hasn't broken YET! Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1716122 Share on other sites More sharing options...
Scribble Posted November 15, 2005 Share Posted November 15, 2005 What head you running sky30? turbo and boost pressure? Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1717836 Share on other sites More sharing options...
sky30 Posted November 15, 2005 Share Posted November 15, 2005 What head you running sky30? turbo and boost pressure? <{POST_SNAPBACK}> RB25 n/a head, GT35/40 turbo, 19-20psi Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1719015 Share on other sites More sharing options...
MarkE Posted November 15, 2005 Share Posted November 15, 2005 .82 A/R? Im tossing up a GT30R Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1719080 Share on other sites More sharing options...
Cubes Posted November 15, 2005 Share Posted November 15, 2005 .82 GT3040R (GT3082R) would be a quick nice spooler, and still have potential for 300rwkw. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1719573 Share on other sites More sharing options...
MonstaS4 Posted November 16, 2005 Share Posted November 16, 2005 I have a 0.82 GT3040R in my DET. Currently running only 9 - 10psi but this is reached at 2600rpm. It still feels like it's pulling well at 6000rpm. Excellent street turbo methinks Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1721604 Share on other sites More sharing options...
sky30 Posted November 16, 2005 Share Posted November 16, 2005 I have a 0.82 GT3040R in my DET. Currently running only 9 - 10psi but this is reached at 2600rpm. It still feels like it's pulling well at 6000rpm. Excellent street turbo methinks <{POST_SNAPBACK}> What RPM does it start to make boost? I take it your running in the engine, but have you ran anymore boost than 10psi, im interested to know what RPM it can make 15psi, and 20psi at? Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1721675 Share on other sites More sharing options...
Cubes Posted November 16, 2005 Share Posted November 16, 2005 MonstaS4, What exh. manifold setup are you running? An external gate and high mount? Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1721691 Share on other sites More sharing options...
MarkE Posted November 17, 2005 Share Posted November 17, 2005 Does the GT30R come in an internally wastegated model? Id like to stay IW if possible... Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1724062 Share on other sites More sharing options...
MonstaS4 Posted November 17, 2005 Share Posted November 17, 2005 Starts to make boost somewhere around 1700rpm from memory. Engine has been in and running for 12 months now. I've had a few teething problems though - internal fuel pump was shagged, some sort of restriction in the return line inside the tank (it's in a VL), cooler pipes popping off, too much oil fed to the head, cam timing out, lack of cash, etc...... so no i haven't ran anymore than 10psi through it. They are all sorted now, i just need to dyno it again. Manifold is a stock RB20DET unit. I made an adapter which 1) serves to position the turbo in the stock position and 2) mounts the external 48mm ProGate. On the last dyno session this adapter got red hot and started spitting little flames off it. At the same time power dropped off and the engine temp went through the roof. I found that both cams were aboout 7 to degrees retarded! This was the result of my cam tensioner positioning. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1724473 Share on other sites More sharing options...
StockyMcStock Posted November 17, 2005 Share Posted November 17, 2005 I found that both cams were aboout 7 to degrees retarded! This was the result of my cam tensioner positioning. stupid non-OEM belt setups! what did you do wrong? i'm afraid mine will be a fair whack out too, you just can't tell with any degree of accuracy. the inlet cam appears spot on, but the exhaust cam looks a little advanced on mine, doesn't line up perfectly with the spot on the timing backing plate. might be a good idea to get an adjustable gear there i reckon..... Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1725291 Share on other sites More sharing options...
Cubes Posted November 18, 2005 Share Posted November 18, 2005 I ran 2 adjustable tensioners... Adjustables new are so much cheaper than fixed. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1725855 Share on other sites More sharing options...
sky30 Posted November 18, 2005 Share Posted November 18, 2005 Starts to make boost somewhere around 1700rpm from memory.Engine has been in and running for 12 months now. I've had a few teething problems though - internal fuel pump was shagged, some sort of restriction in the return line inside the tank (it's in a VL), cooler pipes popping off, too much oil fed to the head, cam timing out, lack of cash, etc...... so no i haven't ran anymore than 10psi through it. They are all sorted now, i just need to dyno it again. Manifold is a stock RB20DET unit. I made an adapter which 1) serves to position the turbo in the stock position and 2) mounts the external 48mm ProGate. On the last dyno session this adapter got red hot and started spitting little flames off it. At the same time power dropped off and the engine temp went through the roof. I found that both cams were aboout 7 to degrees retarded! This was the result of my cam tensioner positioning. <{POST_SNAPBACK}> What trans you running in your car Auto/ Maanual?? How did you fix your cam timing? Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1726747 Share on other sites More sharing options...
StockyMcStock Posted November 18, 2005 Share Posted November 18, 2005 I ran 2 adjustable tensioners... Adjustables new are so much cheaper than fixed. so did i, but only because i had easy access to two from a few RB30 blocks i had lying around when i get my manifold back off my mate, i'll bolt the plenum, turbo and manifold on and post some pics up for ya. Link to comment https://www.sau.com.au/forums/topic/15420-r33-rb30-conversion/page/131/#findComment-1727068 Share on other sites More sharing options...
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