savageskaterkid Posted July 11, 2007 Share Posted July 11, 2007 What are the actual diffrences between these 2 motors. Some people say the blacktop has more power/torque, but same places say its the same. I have also recently heard that the blacktop has forged pistons, but I don't remember seeing too much about this. A simple google search shows that the main benifit is the fact that its a new engine, and would therefor have less miles, and not too much else. I tried searching some of the 240sx forums, and its a bunch of kids fighting and flaming others, and becomes hard to tell if the info is correct. What is the actual diffrences? I know theres a few people on here that do alot of SR swaps, and Vildini comes to mind, would you happen to know? Quote Link to comment Share on other sites More sharing options...
SR240Z Posted July 11, 2007 Share Posted July 11, 2007 the only difference honestly is the fact that it is a newer motor and would imply that it has less mileage. The s13 blacktops also come with finned heads towards the front of the valve cover, but i hav e also seen some of the redtops come like this as well. Quote Link to comment Share on other sites More sharing options...
ZXRockie Posted July 11, 2007 Share Posted July 11, 2007 the only difference honestly is the fact that it is a newer motor and would imply that it has less mileage. The s13 blacktops also come with finned heads towards the front of the valve cover, but i hav e also seen some of the redtops come like this as well. second to that, they just change the valve cover because the red looks better. Ussually people abused the black top more, because the came in newer s13 and they were used for drifting, but not a very actual fact. try to get auto block, the TPS needs to be from a 5-speed block and there you have it, a less abuse engine, less red-lining... Quote Link to comment Share on other sites More sharing options...
Careless Posted July 12, 2007 Share Posted July 12, 2007 the port design on one has been mentioned to be different, aside from the fins on the front portion of the head, which some of BOTH engines had, depending on what year you grabbed it from. s13 180sx's had red tops that replaced the CA18. they were from 91-93. s13 silvias had red tops that replaced the CA18. they were from 91-94 s13 180sx's then came out with the black top in 94-98. s13 silvia's came with both red and black tops (very late model) in 94, the s13 silvia's last year of production. s14 silvias had s14 black tops from 95, up until the s15 came out, then it was replaced with the s15 blacktop. s13 180sx had s13 blacktops alongside all s14 silvias (s14 zenki and s14 kouki) therefore, you will find much fresher s13 180sx engines in some cases, if they're blacktops. the difference between the high port heads is that the port, by design, was further away from the block deck surface (higher if looked at from the side, and down into the port) than the low port heads, which had the ports cast at a less steep angle, and made the intake path more obtrusive. the high ports have a more direct shot into the cylinders, whereas the low port have more a restriction, being it is a tighter arc within the casting, apparently. maybe an SR specialist can tell you what to look for when purchasing though. this is off the top of my head from back when i was on 240sxforums in about 1998, i think my account is still there, imma check EDIT: 1600 posts, and still loggin in, years later damn, i just noticed im not posting here enough =( *spam spam spam spam* Quote Link to comment Share on other sites More sharing options...
SR240Z Posted July 12, 2007 Share Posted July 12, 2007 but hes asking about both s13 engines not between the s14 and s15 blacktops compared to the s13 motors. Both s13 sr20dets were high port since they dont have the VTC. Quote Link to comment Share on other sites More sharing options...
Careless Posted July 12, 2007 Share Posted July 12, 2007 but hes asking about both s13 engines not between the s14 and s15 blacktops compared to the s13 motors. Both s13 sr20dets were high port since they dont have the VTC. i know what he was asking, i was just told that there was a variance, even in the s13 models, which had nothing to do with the S14/S15 cam timing control. =/ wrong info i guess. but the roll-out info i listed should be correct. Quote Link to comment Share on other sites More sharing options...
240zwannabe Posted October 2, 2007 Share Posted October 2, 2007 i can't remember exactly where i read it, it may have been on here but there was a forum out there somewhere, where a guy was modifying the sr20ve head to work on the sr20det block Quote Link to comment Share on other sites More sharing options...
PSi Posted October 3, 2007 Share Posted October 3, 2007 i can't remember exactly where i read it, it may have been on here but there was a forum out there somewhere, where a guy was modifying the sr20ve head to work on the sr20det block NEO VVL ? If so why not just use an SR20VET engine from an X-trail GT S14 -S15 SR's are allready VTC (also known as NVCT) ... -PSi Quote Link to comment Share on other sites More sharing options...
Lunar240z Posted October 7, 2007 Share Posted October 7, 2007 its on here, well, and on sr20forum, where another guy is attempting the same swap but in a 240sx... its me.you'll need to have access to a tig, a machine shop, and will need to do some kind of distributorless ign. running the oil line for the cam activation is the easiest part of it. fnding a good rwd shortblock was the biggest problem...i literally tried 5 times to find a good one...and ended up sleeving one with a bad cylinder wall once i couldn't. and why not use a sr20vet from an xtrail? well, you'd have to do the same mods for rwd application anyways... they're harder to find, and way more expensive. you'd get a cast turbo exhaust manifold that can sit on a shelf in your garage once you get a custom tubular one. on the other hand the valve cover is cool...like a 20v's , and has individual coils...which you may or may not be able to use with whatever ems you choose. Quote Link to comment Share on other sites More sharing options...
savageskaterkid Posted October 7, 2007 Author Share Posted October 7, 2007 I had heard that the s13 blacktop had a better cooling system, and oil system, I'm a bit skeptical on this however. Except for the cooling fins, thats really the only diffrence, but they were present in the second gen s13 redtop Quote Link to comment Share on other sites More sharing options...
pavcon Posted November 14, 2007 Share Posted November 14, 2007 ok now.. y not a 1999 black top? Trust exhaust system, boost controller at 1.0 bar+ some overboost and we have a 300bhp motor with a bunch of torq. We had that on a friends s15. never had a problem. oh intake was apexi but that wont' make much difference in performance. OR WTF??? buy the new VQ38 Twin turbo Quote Link to comment Share on other sites More sharing options...
SR240Z Posted November 14, 2007 Share Posted November 14, 2007 There is no trust exhaust system for our cars in 3" piping. S15 blacktop motors are not exactly cheap nor are they really worth it if you are upgrading cams and turbo anyway. Ill take a built s13 redtop over an s15 blacktop anyday. Quote Link to comment Share on other sites More sharing options...
pavcon Posted November 15, 2007 Share Posted November 15, 2007 MAN I GOT A 3" EXHAUST IN MY GARAGE.. WANNA TAKE A PHOTO AND POST IT?? I HAD I T ON MY CAR AND NOW I GOT THE STOCK ONE FOR SOME REASON... I'm NOT AN IDIOT U KNOW. Quote Link to comment Share on other sites More sharing options...
pavcon Posted November 15, 2007 Share Posted November 15, 2007 and again. S13 red top working 1.1 bar with overboost could nt' get away from mine.. ALL stock.. even exhaust... Quote Link to comment Share on other sites More sharing options...
SR240Z Posted November 16, 2007 Share Posted November 16, 2007 You have a Trust 3" Complete exhaust for the S30 chassis? I would really like to see it please. No one is calling you an idiot so dont get too ahead of yourself. Quote Link to comment Share on other sites More sharing options...
rztmartini Posted November 17, 2007 Share Posted November 17, 2007 well, since TrusT did make an exhaust-manifold for the S30 chassis, it might be possible they did produce, if just a few sets. Quote Link to comment Share on other sites More sharing options...
pavcon Posted November 17, 2007 Share Posted November 17, 2007 I have found it.. it's only listed on the japanese catalogue since in Cyprus we only import directly from japan. this is the picture and this is the link to the catalogue of the japanese page.. www.trust-power.com/spec_swf/01exhaust/Muffler_nissan.swf the one with price Y130,000 says for S14 but this is it. I think the 80 is the mm. 3" is 76mm but this is how they state them CORRECTION.. 1st one on the second page of the link Quote Link to comment Share on other sites More sharing options...
SR240Z Posted November 17, 2007 Share Posted November 17, 2007 i dont see that being a listing for an S30 chassis, if you read my post above i asked if it was for an s30 not for a S13, s14, s15 chassis. There is no trust exhaust system for our cars in 3" piping Quote Link to comment Share on other sites More sharing options...
pavcon Posted November 17, 2007 Share Posted November 17, 2007 I was talking about my car's chassis. SR20det is not supposed to be on the S30 chassis. (not sure thought) Maybe that's why it's dificult to find it. why not make a custom one based on that? Quote Link to comment Share on other sites More sharing options...
Careless Posted November 17, 2007 Share Posted November 17, 2007 I was talking about my car's chassis. SR20det is not supposed to be on the S30 chassis. (not sure thought) Maybe that's why it's dificult to find it. why not make a custom one based on that? because making the downpipes are not the hard part, it would be trying to get the piping to squirm underneath the s30 chassis in a fitting manner that would be the challenge. If you're going to modify an exhaust made for another car completely, you might as well start from scratch and buy an HKS Muffler or something. Atleast that's what I think. Quote Link to comment Share on other sites More sharing options...
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