Guest tankglh21 Posted March 4, 2004 Share Posted March 4, 2004 hey guys, i dont know if i am posting this in the right spot but here it goes. i have a mainly stock 1984 300zx 3.0 turbo. and i was just trying to find out what it is supposed to run in the 1/4 mile. my buddy said he had a c&d mag that said it ran 16.5 but i find that hard to believe. this car is way faster than my glh was and the glh's were known to run in the 15's from the factory. lemme know what you guys think. Quote Link to comment Share on other sites More sharing options...
Guest bastaad525 Posted March 4, 2004 Share Posted March 4, 2004 Nah your friend is off a bit, or the magazine he's reading is. While the stock 300zx turbo motor is actually pretty powerful, problem is the car is too heavy, so they were only good for about a mid 15 second quarter mile. That was actually pretty quick for the time. However... faster times are only a few psi of boost away You should easily be able to run another 2-3psi of boost with no other modifications. Get yourself one of the do-it-yourself boost controllers, total cost for parts is about $10-15, and installation takes minutes. However, you will also need to get a reliable boost gauge, not sure if the ones in the 300zx (does it even have one?) are reliable or accurate. So figure another $50-75 for the boost gauge, and installation isn't too hard, depending on where you want to put it. Anyways, those extra 2-3psi should be good for 30-50hp, and probably shave a good second or so off your 1/4 times. VERY good return for less than $100 invested, eh? Quote Link to comment Share on other sites More sharing options...
Guest tankglh21 Posted March 4, 2004 Share Posted March 4, 2004 yeah thats what i figured. the car did come from the factory with a boost gauge but we all know that the factory boost gauges arent trustworthy. and i am kicking myself in the pants because right before i got my z, i sold my omni glh and sold my joe p. mbc and snazzy autometer boost gauge lol. i can probably still get the mbc back from him but i doubt i can get the gauge back. thanx for the info. i have a 1g talon ic i am getting ready to ic this motor. on these cars it looks alot easier than it looked on my glh. thanx again. Quote Link to comment Share on other sites More sharing options...
Guest FinalRights Posted March 4, 2004 Share Posted March 4, 2004 2-3 psi adds 50hp on a Z31? oO Hate to break the news,but no. The stock t3(84-86) is only good to about 12 psi where its more harmful the helpful. The stock boost is 6psi if I remember correctly. Sadly your friend is right that the car runs around 16's. The car does weigh over 3000lbs though,even in the non-2+2 state. The lighest and rarest form is the Slicktop,no automatic anything and no t-tops. Quote Link to comment Share on other sites More sharing options...
Guest tankglh21 Posted March 4, 2004 Share Posted March 4, 2004 see thats where i am confused. from the factory a glh runs a 16 on a bad day. and my glh was modded- mp computer, 255 fp, 2 1/2" mandrel bent exhaust from the turbo back, no cat and a magnaflow. and my 300zx is stock besides a test pipe. and this z blows my glh out of the water. and if i remember correctly my glh dipped down into the high 14's. so maybe there are some things done to the z that i cant see, because it is way faster than my glh was. Quote Link to comment Share on other sites More sharing options...
Guest FinalRights Posted March 4, 2004 Share Posted March 4, 2004 Are you saying your Z hit high 14's with just a test pipe? o_O You sure you have an 84 and not a 94? The fastest Z31's I've seen (with the stock engine) hit low 13 - high 12's.These cars have a gutted intakes,upgraded turbo's,fuel injectors,fuel pumps,cams,exhaust,etc. One hit low 12's with N2O. Quote Link to comment Share on other sites More sharing options...
Guest tankglh21 Posted March 4, 2004 Share Posted March 4, 2004 i am saying that it feels like a low 15 high 14 car. but that is what it feels like. all i plan on doing is turning the boost up to maybe 11 lbs and slapping an ic on. and it that makes it a 14 second car i will be happy with as i will have less than 1k invested in the car. Quote Link to comment Share on other sites More sharing options...
ZR8ED Posted March 5, 2004 Share Posted March 5, 2004 I had an 88 300zxt 2+2 automatic. I turned the boost up from 6 to about 9.8 (no i/c) And I ran mid 14's all day long.. and it only had a t25 on the 88+ years. You can safely run 10psi on stock engine on 94 octane fuel...you will have to be more careful in the hot summer though to be safe.... an i/c will add some level of security to that.. Quote Link to comment Share on other sites More sharing options...
wigenOut-S30 Posted March 5, 2004 Share Posted March 5, 2004 JTaylor from this site ran 13.9s in his Z31T and all he had was boost controller Running I think11 lbs and the exhaust dumped after the DP to a race magnum.. So I know it can be done. Quote Link to comment Share on other sites More sharing options...
Guest bastaad525 Posted March 5, 2004 Share Posted March 5, 2004 2-3 psi adds 50hp on a Z31? oO Hate to break the news,but no. The stock t3(84-86) is only good to about 12 psi where its more harmful the helpful. The stock boost is 6psi if I remember correctly. Sadly your friend is right that the car runs around 16's. The car does weigh over 3000lbs though,even in the non-2+2 state. The lighest and rarest form is the Slicktop,no automatic anything and no t-tops. wow... that was a kinda negative 'sounding' post there. Well, I know stock, a 280zxt will put down 145-150hp to the rear wheels (Jeffp dynoed his bone stock 280zxt and that's what he got, anyways). And I'm running the stock 280zxt motor in my car, with nothing but a boost controller, running 10psi (over the stock 7psi) and actually my exhaust is crappier than a stock exhaust, for what that's worth, and I put 200hp to the wheels. That's a 50hp increase, but I'm figuring there might be other factors so I estimated 30-50hp increase from 3psi. I don't know what is different about a VG30 from an L28 that would make a similiar boost increase any less effective. Yeah you're right after 12psi the T3 isn't worth much, fortunately in stock configuration our T3's were set to run much more conservative boost leves, usually 5-7psi from the factory, so that leaves some room for improvement before the turbo runs out of efficiency. And by the way, lots of people run more than 12psi on a T3 and make yet more power... it may be out of it's efficiency range at that point, but it's not exactly useless either. Before I answered this question I did a little hunting for info, I didn't just pull the number out of my behind. Stock, a 300zxt, 2 seater, 5 speed, I found numbers from 15.5 to 15.8 in the 1/4, at about 95mph. That is average for a 200hp, 3000lb car. By comparison, an Acura RSX, has 200hp, and quite a bit less torque than a 300zxt (like 130ft lbs of torque vs. 300zxt's 220 something), and weighs about 200lbs less (good for 2-3 tenths difference) and runs stock, about a 15.1. And just as I said, and the other guys who posted here confirmed from their own experiences, not just pulling numbers outta the air, that raising the boost up a few psi will easily drop the otherwise stock 300zxt into the mid 14's. You sound so certain with the info you give, and come off with an attitude as well (unnecessary and unwanted)... sadly, YOU'RE info is WRONG. Do some real research next time before you come spouting your facts. Quote Link to comment Share on other sites More sharing options...
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