so with this weight and this rwhp what ya think it will run

[dilop]

ON3GO One Question, That "cutout" that you use is like a "gate" for change from "normal exhaust" to "open exhaust"?

Do you get a proper seal from those "butterfly" nuts?

 

Thanks and regards,

 

Diego

[Guest ON3GO]

i was surpised about the weight.

this is without no bumpers, no supports either, no spare and RX7 FD seats which are lighter.

but the car had 20+lbs of tools in the back, a sub and some RF rear nice weight speakers.

i thought the 77's and 78's were the heaviest?

maybe it has something to do with the fact that this 77 280z was made in 1/77???

 

 

and yeah the cutout is like going from full exhaust to open downpipe pretty much, it seals pretty good with those wing nuts, i have a gasket between the dump and cap.

 

mike

[80LS1T]

Bastaad525, I think maybe if the conditions were really good and you had some sticky tires on the back and you pulled an awesome 60' you could hit a high 12 but you would have to drive like Scottie! LOL

 

 

Guy

[Guest ON3GO]

well a adjustable fpr is on its way, and ill put on my MSD 6-BTM unit on and crank the boost up some more.

if this ass munch in town will give me my used slicks i bought i can put them on the Z and hit a 12.. i KNOW i can do it..

right now its running 10psi with really no mods.. feels great!

 

mike

[Guest bastaad525]

Bastaad525' date=' I think maybe if the conditions were really good and you had some sticky tires on the back and you pulled an awesome 60' you could hit a high 12 but you would have to drive like Scottie! LOL

 

 

Guy[/quote']

 

 

naaaaah come on.... Jersey was pulling high 12's w/o much hassle in a very similiar setup to mine... I dont think I'd need 100% optimum perfect launch, conditions, etc. to get there. Well then again, Len is quite a bit lighter guy than me I believe ? I might be off on the weight though... the car was 2300lbs before the turbo conversion, with 1/2 tank of gas, my tools, spare and jack in the car... I'm just completely guessing that I've added maybe 100lbs after the swap and adding the I/C and whatnot. I'm probably off on the current hp number a bit as well but I figure the 2psi of boost should be good for at least 10hp. After figuring all that you're probably right and best I could probably do w/o some better tires and lots of practice (I've only ever run down a dragstrip four times and never in this setup) is a low low 13. Last major upgrade I have in mind for HP is to upgrade to full 3" mandrel exhaust... Maybe that'd give me the last few hp I need?

[Jersey]

You guys should be right there - low 13's, high 12's. Mike, i'd say you added about 50hp going from 5psi to 10psi so that should get your times much lower. I'm 165lbs and my Z weighed in @ 2325 at the time i ran the 12.88.

 

525, the differences between my Z back then and your current setup is a full 3" mandral exhaust, my 45deg DP and a set of 235/60/14 firestone street tires (just so not to run out 4th through the trap) I also didn't have an adjustable FPR back then like you do now. It was 80 degrees w/90% humidity that night and i pulled a 1.96 60ft. Not too optimal but it all worked out for those 13 seconds i guess! lol. I noticed a nice improvement by the seat-o-da-pants dyno from the 45deg DP and the full 3" mandral exhaust so it might get you where you want to be. Then again, once we reach our goals, dont they change to just out of reach again???

[Guest ON3GO]

man you guys are almost out of 4th in the 1/4th in your cars?

im at the Top of 3rd at the very end of track.

and i have 225-60-15 tires and stock R200 and 77 280z 5-speed.

boost starts to bleed down at the top of 3rd though but not so bad.

 

mike

[Guest bastaad525]

You guys should be right there - low 13's' date=' high 12's. Mike, i'd say you added about 50hp going from 5psi to 10psi so that should get your times much lower. I'm 165lbs and my Z weighed in @ 2325 at the time i ran the 12.88.

 

525, the differences between my Z back then and your current setup is a full 3" mandral exhaust, my 45deg DP and a set of 235/60/14 firestone street tires (just so not to run out 4th through the trap) I also didn't have an adjustable FPR back then like you do now. It was 80 degrees w/90% humidity that night and i pulled a 1.96 60ft. Not too optimal but it all worked out for those 13 seconds i guess! lol. I noticed a nice improvement by the seat-o-da-pants dyno from the 45deg DP and the full 3" mandral exhaust so it might get you where you want to be. Then again, once we reach our goals, dont they change to just out of reach again??? [/quote']

 

 

Yeah that's what I'm figuring I'll need the 3" mandrel to be able to get into the 12's. I think you were running more boost at that point as well weren't you? I'm at 14psi and leaving it there, dont think I can push fuel pressure any more to raise it any higher. I dunno if it's just that i"m launching sucky or what but I do notice that with my crappy tires traction is really not much of a problem. If/when I ever do get my Z to the track I need to have a friend drive it for me because I just KNOW I"m gonna suck scooting this thing down the track in a timely manner. Probably only good for a high 13 with me at the wheel.

 

BTW Jersey, how did your car get so light? I seem to remember reading some time ago you posted your weight and it was about 100lbs heavier than mine was. Mine weighed 2320lbs BEFORE the turbo swap, I'm assuming the turbo swap added some weight though I'm not sure about that... I need to go weigh again maybe my 2400lb estimate is way too high?

[Jersey]

What DP are you using 525? If it's that cast 90deg one, see if you can find or fab up a smoother flowing one. My opinion but, i think that stock 90deg pipe really backpressures the turbo and in turn, heats it up real quick. I was running about 14-15psi, stock injectors and smaller NPR. Yes, i'm sure i was realllly lean on the top and took a major chance but i got lucky i guess. I'm still playing with fire even though i can richen it up across the full rpm range with the MSD AFPR but, i just want to see if i can hit 11's with this "basically" stock setup. If and when i do i will be going in some sort of aftermarket electronics way to do it right. 2325 was what it weighed in at the night i ran the 12.88. I may be getting back to the track on Wednesday for the first time since i ran the 12.47 in June and they have a scale which i'll weigh again and let you know.

 

Mike - with the T5, 3.54 and 215/50/15's, i crossed the trap screaming in 4th near 6k doing 106mph, which i think is out of the powerband range for a stock L28ET cam by about 4-500 r's. Now i run the 235/60/15 BFG DR's which are about 26" diameter and crossed the trap in 4th @ 111mph and right at about 5200rpm. I think the r's are a little low now but if i can get down the track a little quicker, it should be right where i want to be. What's your tach reading at the end of the trap in 3rd and what's your MPH?

[Guest ON3GO]

well each time i went down the track it was only boosting 2-3psi so at those levels i was exiting the track at 95-97 mph and at 6K in 3rd.

 

question too.. your running high boost right.. like 18?

if so what headgasket you running?

reason i ask is im getting white smoke now at idle and throughout the gears.. more at idle though.

and i also check my oil today and im pretty low.

it doesnt leak so it must be burning it, but i never noticed.

 

im really broke right now but if i have to ill put in another short block with a HKS metal headgasket... but i really dont wanna as money is very very tight.

 

because as of now the plans are to get as much as i can out of this pretty much stock setup... so 16-18psi and a alky system, and also a better intercooler sooner or later (mitsu EVO 8 stock unit)

 

mike

[yo2001]

The smoke you are talking about sounds more like the ringland problem than a blown HG.

[Jersey]

My guess would be with Yo's, you may have a possible ringland problem. I found out that i was stretching 3rd too far when shifting @ 6k because i thought it was still pulling real hard but have figured out if i shift out a little earlier, say 57-5800, i can pull a better ET. I pushed it last time i went to 18psi but i think there's a problem because once the speed catches up with itself and there's less torque, the pressure slowly decreases down to about 15 by the end of the 1/4. I'm not 100% sure if this is why the boost is dropping off, because the little T3 just cant hold that type of boost without the torque or, possibly something else is wrong, like the BOV is leaking or something? Anyone reading this have a suggestion? I'm running the stock headgasket. This P90's never been off the block but I'm sure it will be soon... possibly after Wednesday night since i think i'm really going to push it to get an 11 I haven't heard this done yet with the T3, stock block/head and stock electronics. Hope it's nice and cool out ans teh wind is blowing down the track! lol.

[Guest ON3GO]

what P90 head you have?

i have a P90A

im eating oil pretty bad, just check it and it was low.

coolent is still sorta full, and it doesnt smoke BAD at all under boost but at idle i can see it when sitting at a light.

car still pulls fine though.

spikes to 10 and levels off at 8psi and then when im in the higher rpms the boost goes to like 6 or so.

im just using a junky MBC... what kind of boost controller you have?

im debating weither or not to buy this..

 

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33596&item=7923092540&rd=1

 

also if this motor i have needs pistons what ya guys think i should do?

im gonna keep boosting this car till about 16psi or so.

my fuel system ill have for it will support it plenty so why not.

so what ya guys think i should do..

remember im broke.

i will be upgrading the turbo by jan to a nice size unit thats well used on turbo volvos.

so if i can run more the 16psi safely i would want too.

but if i get that boost controller i can run low boost and then high boost when i need to.

 

well i dunno what to do so all help would be great.

 

mike

[Jersey]

P90 that came on the '82ZXT's. No boost controller, just threaded the WG actuator I'm not sure of what your goals are with ol' blue but if they are to build a nice powerhouse, i'd save a little cash and go forged. My opinion anyway.

[Guest ON3GO]

hmm not a powerhouse at all.

i want it to be reliable.

its my daily driver.

i drive it every day atleast 60miles, sometimes way more.

werid thing is compression was fine the otherday when we checked it.

i can get a deal on getting my block machined for forged pistons so what would you recomend i get.. lowest price the better lol.

ill prob never go more then 18psi on the car.. ever.

i do want to run 12's in it, but i want this car to last.

 

i can get the block cleaned, bored, honed, preped and etc. forged pistons installed and etc, plus the head ported and polished and cleaned for 100 bucks even. .. friend of the family.

so it wouldnt leave me much at all for forged pistons.

 

thanks man

 

mike

[Cody 82 ZXT]

im just using a junky MBC... what kind of boost controller you have?

im debating weither or not to buy this..

 

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33596&item=7923092540&rd=1

 

Thats the boost controller that I have. It's easy to use and works well.

 

You'll be surprised how much torque you'll gain by using an electronic boost controller vs a manuel one.

[Guest ON3GO]

im just using a junky MBC... what kind of boost controller you have?

im debating weither or not to buy this..

 

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33596&item=7923092540&rd=1

 

Thats the boost controller that I have. It's easy to use and works well.

 

You'll be surprised how much torque you'll gain by using an electronic boost controller vs a manuel one.

 

ya i no..

i think ill bid.. i just dont know.

 

mike

[Cody 82 ZXT]

im just using a junky MBC... what kind of boost controller you have?

im debating weither or not to buy this..

 

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=33596&item=7923092540&rd=1

 

Thats the boost controller that I have. It's easy to use and works well.

 

You'll be surprised how much torque you'll gain by using an electronic boost controller vs a manuel one.

 

ya i no..

i think ill bid.. i just dont know.

 

mike

 

 

I don't blame you. Did you notice where it's coming from? Shouldn't make that big of a differnce but, if the product never came it would be hard to knock on that guys door and get your money back. Seems like you could find one closer.

[Guest ON3GO]

 

I don't blame you. Did you notice where it's coming from? Shouldn't make that big of a differnce but' date=' if the product never came it would be hard to knock on that guys door and get your money back. Seems like you could find one closer.[/quote']

 

ya but i havent found one for that low of a price in that good of a shape with all parts.

 

mike

[Cody 82 ZXT]

How much are they new? I bought mine several years ago and it was 299.00 if I remember correctly. After shipping the one in Japan wouldn't be to far from that price.