Guest Anonymous Posted December 3, 2001 Share Posted December 3, 2001 ok got a almost stock l28e motor how many lbs will it hold of boost?? Quote Link to comment Share on other sites More sharing options...
GrayZee Posted December 3, 2001 Share Posted December 3, 2001 What year is the L28 engine? Although I don't think the n/a L28 bottom end is as strong as a turbo one I can give you a suggestion. If your engine is 1980 or older you'll have dished pistons and a small cc cylinder head chamber. Pull the head off and replace it with a P79 or a P90 head (1981 or newer) The larger combustion chambers will lower your compression ratio and allow you to get away with more boost. If you are not already aware, the lost power from the lower compression ratio is more than made up for by allowing you to run more boost. As for how much boost you can run, well I'm not really sure I would guess it would handle 6 or 7lbs but you'd best wait for a answer from one of the members that has been nominated for "TURBO-GOD" status. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted December 3, 2001 Share Posted December 3, 2001 Did I get the nomination???? Anyway, the stock L28 motor can handle quite a bit of boost, but the best way to specify it is not in terms of PSI, but more in terms of horsepower. The stock turbo motor can handle in excess of 400hp reliably. The trick in maintaining reliability is thermal management -- how low can you keep your intake temperatures? A stock 280ZX turbo is going to have trouble providing useable boost over 15psi. An upgraded turbo, say a T3/T04E, can keep the intake temperatures down (with a good intercooler), and you can run 20-25 psi boost on a stock motor. So the real answer is a question, how much boost can you afford? Quote Link to comment Share on other sites More sharing options...
GrayZee Posted December 3, 2001 Share Posted December 3, 2001 You are saying that the stock 280zxt "engine" can handle 25psi??? That's a big ole can of WHOOPass! Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted December 3, 2001 Share Posted December 3, 2001 Yes it can, I've seen it done repeatedly. The key here is to control dentonation. At these power levels, this involves very good control of the fuel mixture (no rising rate regulators here) with a good aftermarket EFI system. You must have a good intercooler, very low pressure drop, so it has to be big. Quote Link to comment Share on other sites More sharing options...
fl327 Posted December 3, 2001 Share Posted December 3, 2001 water injection, intercooler, air to water capabilities, boost baby, big pimpin, gotta be fun....cant forget the blowoff valve, a must have. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted December 4, 2001 Share Posted December 4, 2001 ok here is somemore info its a 1982 280zx stock motor besides injectors and header non turbo what will it hold non inter coolled and inter cooled and my friend told me no stock motor will hold 25psi you must be choking on something note what he said not me Quote Link to comment Share on other sites More sharing options...
Guest scca Posted December 4, 2001 Share Posted December 4, 2001 i dont think the stock pistons from a NA will take over 17 lbs even with water injection,they have weaker ring grooves than the forged turbo pistons. use real turbo pistons, with all the stuff previously mentioned to control detonation..as if it detonates it will explode......... Quote Link to comment Share on other sites More sharing options...
Scottie-GNZ Posted December 4, 2001 Share Posted December 4, 2001 SleeperZ hit the nail on the head. How much boost you or any engine can run depends on how well you can control detonation. The best thing to do is to find a complete L28T engine. Next best as specified before, is to run the NA block with a P90 head. I would advise against this combo if you plan to use the stock NA injs and no I/C. I do not advise anyone to run a complete stock NA engine. One of my buddies here in Orlando ran a NA block with a P90 head in a 71 for years. He kept turning up the boost and eventually got detonation at 22# on pump gas. How did he do it? T3/T04, big Spearco I/C, mandrel I/C pipes, 440cc injs, Pierburg pump, JWT setup. He abused that J/Y block with over 120 1/4-mile passes before he eventually broke the rings. Car ran a best of 12.32. Would I advise anyone else doing that? Yes, but only if you ran equivalent components and less boost on pump gas. At the track, dump in a race gas mixture of about 100-104 octane and crank up the boost. If you plan on spending $$$ on that kind of setup, spend a few extra and do it right with the turbo block. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted December 4, 2001 Share Posted December 4, 2001 ok heres why i was wondering ill give you the hole story...... i got my 1982 280zx 8 monthes ago and it is unbleavable fast for what it is :saying stock motor with over sized injectors and header: i was talking to the guys in the import club we meat every saterday night in a parking lot i was guna go v8 :saying i have a chevy 327: but they keep telling me i need to keep straight rice and see what i can get out of the inline there are only about 3 cars that could beat me out there not because of the car but because of the driver... well i can get a l28et pretty cheap i think im friends with the guy that owns east cost z but i found out my frame rails are rusted out and i dont think i wana bother with the heavy zx body so im looking at a 73 240 turbo seats 4 pice racing harness 15x12 rims all the way around no motor or trans but was set up for a v8 could i use my 280zx as a trany and drive axle doner and put a l28et motor under the hood and i have that td05 turbo and im shure if i messed with it some i could make some plates to bolt it on and iv been told i could get 14-16lbs out of that turbo id ont think i wana run more than that unless im pushing under 400hp then i may have to shoot it with some n.o.s. or do a few other things .... the reson im building the z is a story of its own i bought mine and i had a guy tell me that i couldent build any thing and that it will never be fast and that he could beat me in a race well i told him same time same place next week :he was in a stock turbo egal tallon: i whent out baught headers and messed with the injectors showed up and blew his doors off.... end of that but on the way home i was thinking i just blew the doors of a rather fast car and i dident do much ?? and my friend chalinged me to build a car to eat up his integra the fastest car in the club so i got work to do any ways any help is good... thanx Quote Link to comment Share on other sites More sharing options...
fl327 Posted December 4, 2001 Share Posted December 4, 2001 you want to build this car to beat an integra? stick the 8 in that body and start hunting them maros, 5.0s, rx7's, and anything else in your way, if you want to build the turbo car thats your choice and it will be quick too, but you cant hate on an 8! Quote Link to comment Share on other sites More sharing options...
DemonZ Posted December 4, 2001 Share Posted December 4, 2001 RE: turbo pistons I believe the L28T pistons are cast also. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted December 5, 2001 Share Posted December 5, 2001 hey just do what i plan on doing. you'll get the best of both worlds: a V8 and 2 turbochargers I'm putting it into a lightened 280zx body with the plan on road racing it mainly but i'm sure it will see some street duty and terrorize this poor little town you run with a club? whats the name if you don't mind my asking. i might be joining up with a club out in reno called HAVOK. i been invited by a friend of mine and she told me she could hook me up with them. it is a rice/import club but that just makes it more fun when i pop the hood and let em count how many cylinders i'm packing just call me a missionary to the misled heh heh heh. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted December 5, 2001 Share Posted December 5, 2001 just my imput but i think your all wrong useing a zx body there heavier and seam to have bad rust problems im curently driveing one but im buying a 73 240z just because of waigh perpuses maby you should re think that one....... and im haveing to sell my 327 due to money problems seasanal work so im not working during the winter so im kind of #$%! for a wail but ill be back on my feet soon i hope Quote Link to comment Share on other sites More sharing options...
Modern Motorsports Ltd Posted December 5, 2001 Share Posted December 5, 2001 "just my imput but i think your all wrong using a zx body they're heavier " We're all wrong using a ZX body?? I think it's just the way you phrased it and not what you intended perhaps. 280Z/ZX bodies are stiffer and about the same weight as each other. Everyone here makes many decisions that are all a result of a balance of tradeoffs that are their own choices, not necessarily right or wrong. I went 280ZX for the interior and cargo room just FWIW. I prefer the older styling but still like my 280ZX styling. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted December 5, 2001 Share Posted December 5, 2001 sorry wasent ment to be taken that way Quote Link to comment Share on other sites More sharing options...
fl327 Posted December 6, 2001 Share Posted December 6, 2001 truly the only reason i dont run a zx body is the smog, i cant afford to do a swap that will meet smog requirements right now. i think with some custom body work the zx can look really tight, sealing up and filling the trim in to be flush with the body, painting the bumpers same color as car, etc, etc, that extra weight doesnt really matter much because it takes less to reinforce the frame for a motor swap, probably a nice roll bar welded in and some strut bars, you nice, and look at how the fenderwells are set up, man i could have my boss at the shop extend those from the original body lines about another two or three inches a side and run some FATMANS, the newer look makes the ultra ricey stuff look right at home on it, why not, if i had the money, i would do a zx next, 280GNZX... that heavieness is in the frame, doors and a couple other places, making it a little more stable on the top end, and worst case scenario, it will take a hit a lot better than that 240 or 280 will. also, they are cheap! they havent reached the classic status the early ones are starting to achieve, thus they can be had cheaper and they are newer, which means your chances of getting a rust free car for cheap are increased. YAY YAY. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted December 6, 2001 Share Posted December 6, 2001 one of the main reasons i'm staying with the ZX is the stuctural integrity. i plan on doing a real nice custom cage setup and triangulate the strut towers to the frame for more stiffness. hopefully this will give me enough that i won't have to do sub frame connectors. although i might just to be sure. when you play with a twin turbo V8 weight isn't as much of a concern as chassis stiffness. i'm sure i'll be making more than enough HP to overcome my slight weight disadvantage. i plan on hopefully being able to boost somewhere around 25-30 PSI with race gas. should be VERY fun your right on the head with those doors fairlady. i was taking some to the junkyard a while ago and those buggers must have weighed in at 60LBS each! ...or maybe i'm just out of shape. i think i might try to lighten them somehow, not sure how yet but i'm sure i'll find some way. i seem to remeber arizona z selling fiberglass door skins but h doesn't do any fiberglass anymore does he?...sigh.. have to do it the hard way i guess. lets not also forget about the fact that although the ZX is heavier it has a better drag coeffiecient than a Z so top speed should be higher and safer in a ZX something to think about. sure a Z may be 300-500 pounds lighter but you'll be pushing more air ahead of you than a ZX so it probably equals out the differance between the two once you make it past the 130MPH mark. if i didn't plan on hopefully being able to push my car close to the 200MPH mark in the silver state run and alli wanted was something for the short street blasts i probably would go with a Z myself. but it all depends on individual taste. i personally prefer the lines of the ZX to the Z but thats me. sorry bout the length of the post but i felt like jabberin, see ya guys later Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted December 6, 2001 Share Posted December 6, 2001 damn sounds like your guna have one bad car.... another reson why im staying with the 6 is also when you eat something up like a bad ass mustang or a hoped up cammaro and they see you some time and ask what you got under the hood and your like ohh just a inline 6 dont you love the look they give you...... any ways the 73 i am trying to get is guna be a auto cros car and street raceing.... saying i got a set of 12x15 inch rims :wich stick out 3 inches due to the off set so they dont runb any thing: im guna make wheel flairs and im cuting the old ones off so when the car sits down the tires will clear saying i havent found a taller with a side wall lower than 255/55/R15 and there guna cost me a arm and a leg... im also doing some custom body work hows custom ram air sound and im also guna rebuild a compleat custom grill but this car wont be drivable any time soon and i still have to get the thing but you know..... Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted December 7, 2001 Share Posted December 7, 2001 your car sounds like it should turn out pretty sweet itself. i wish ya luck and speed in your project. i got a quick question for ya. are you doing your own bodywork? like the ram airsetup and the fender flairs? i am planning on taking out the rear hatch and remodeling the rear with a pantera look to it. then i want to take out the 2 rear windows completely and weld in steel there. i also want to take off all the trim, shave the door handles and try to make a nice fiberglass front facia. I should be getting a MIG before this summer and was wondering if you knew any tips for me? any tricks of the trade? thanks for any help you can give, i appreciate it. oh before i forget, LOL yeah it is always a kick to see someone face after you beat them. in something there not expecting. i just took out a brand spanking new honda prelude (still had the dealership 30 day registration sticker on the rear window ) like he was standin still. i was driving my 87 thunderbird TC at the time. i don't think he liked it when i asked him through my window "i thought those things are supposed to be fast?" heh heh heh ...i'm evil. i guess he should have bought a faster car Quote Link to comment Share on other sites More sharing options...
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