scottyMIz Posted April 19, 2008 Share Posted April 19, 2008 well i finally got the urge to see what piston/s took the damage i had been noticing out the tail pipe. The number 5 piston was at about 90psi and the rest were at 130 or so. The ones that were "good" were all pretty much the same there was about a psi or two difference but nothing like the 90psi on number five. Honestly i was expecting it to be either one or six, i'm sure the problem was with the haltech but it is fixed now . I just need to find some used pistons now to make the rb25 block good again. Quote Link to comment Share on other sites More sharing options...
Careless Posted April 19, 2008 Share Posted April 19, 2008 Hey scotty, what would RB30 or RB26 pistons do for you? The RB25 pistons have a 1.180 or so piston height, the RB26 are the same, I think. I did read that the RB25DE pistons give the most compression ratio at 10.5 - 11.5:1. The RB25 or 26 will net somewhere in the proper range you want to run. I may be receiving my RB26 in june. I'll just give you the pistons if you or Jason come down to hang out! Raff Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted April 19, 2008 Author Share Posted April 19, 2008 im not sure careless, something to look into tho. Sounds like a deal tho if the rb30 pistons work then i have 6 im sure they wont work but ifthey did i'd be a happy camper. I am looking at a rb25 head right now hope to get one so i dont have to tear one engine apart to build the other. I would like to take my time on the rb30det and just run the br25 until i get the other done. When i was pullin plugs they were all the same in color.......BLACK!! lol i guess it was runnin a bit rich I am getting a wideband for this year too. Quote Link to comment Share on other sites More sharing options...
Careless Posted April 19, 2008 Share Posted April 19, 2008 Oh, hahah. well the offer is still on the table if you need some slugs! I thought you were building the RB30 here. I don't think it will work to meet a budget with mismatched parts, either Quote Link to comment Share on other sites More sharing options...
Mack Posted April 20, 2008 Share Posted April 20, 2008 I have a complete RB25DET block that broke a timing belt. some pistons have marks from where the piston-valve sex took place, others are clean. let me know if you want them, as I am going up to Fargo, where they are stored next weekend. Quote Link to comment Share on other sites More sharing options...
Z24O Posted April 20, 2008 Share Posted April 20, 2008 RB30E pistons will work for you giving around 8.5:1 with the RB25 head on RB30 bottom end.....RB30ET pistons will be too low compression at around 7.5:1 RB26 pistons will be too far down the bore due to the different pin height to RB25 and RB30's have a look on skylines australia forum for more info Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted April 20, 2008 Author Share Posted April 20, 2008 I am building the rb30 but i want to be able to run the 25 while i am building the 30 just incase i dont get it dun in time. I could definately use those pistons, what are you asking for them mack? Quote Link to comment Share on other sites More sharing options...
Racinjitter Posted April 21, 2008 Share Posted April 21, 2008 Thats no good Scotty! Did you ever get into contact with the guy from columbus? I may come up there next weekend (harbor Beach). I'll call you this week! Raff, I have more parts for you... On the way! Quote Link to comment Share on other sites More sharing options...
Mack Posted April 21, 2008 Share Posted April 21, 2008 eh, well see what kind of shape they are in, but not much. enough for a 12 pack? I should be able to get them this weekend. truth be told, I was going to go the RB30DET route, but Im kind of dead set on the 1.5KA head thing. Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted April 21, 2008 Author Share Posted April 21, 2008 sounds like a deal to me, i only need one maybe two but i'll take the whole lot and use the best ones. I am working on another head as we speak so i can keep the rb25 together and when im dun i'll swap it into my sonoma Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted April 21, 2008 Author Share Posted April 21, 2008 jitter you mean the guy that had the other pistons? i talked with him and he got rid of them already. Quote Link to comment Share on other sites More sharing options...
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