dj paul

Hey guys, ive looked around and read up on this but i want to get a little bit more specific. My friend is not fabricating a TT exhaust manifold for me out of a stock turbo manifold (he a machinist) and im just wondering about doing a sequential turbo setup. It has intrigued me. Ive ridden in my friends sequential turbo rx-7 and i know rotarys are diff but it was an awesome *** car quick spool up at the biggening and then around 4k maybe less it started to sound and feel like a space ship or something. My plans for this car Are AutoX/street use. I have a daily driver so reliability is not too big of a problem but i would like it if possible. I know the plumbing to this is going to be hard, but what would be the best two turbos to use with a 280ZX motor running 9:1 CR with plenty of fuel, to utilize the sequential turbo setup.

how much did it cost you to do all that. i would not mind having that.

well i believe what hes using is just pure stock Ev. yes i do agree that there are many different things that can affect that figure. well it varys throughout the rev rang by getting higher by the rpms (or lower i cant remember) http://www.ajdesigner.com/phpengine/engine_equations_volumetric_efficiency.php im not sure how to add in the other factors.

Hey guys ive been searching the web forever for these and have just happened for stumble accross them. you can match these up with different compressor maps to find the perfect turbo. Also there are equations here, if you dont have an L28, to figure out your own flow rates and make your own flowrate map to match up. http://www.mygen.com/users/dbruce/myz31/TurboMaps/L28ET%20Engine%20Air%20Flow%20and%20Turbo%20Compressor%20Maps.htm

http://www.compcams.com/information/Products/RockerArms/MagnumRoller.asp i think these are almost the same thing. supposedly in some applications they are good for 20-30 more horses. i would just like them to give the valve train more durability, even if they didnt give that much added horsepower. they also are supposed to reduce wear on the cams or something.

hmmm.... these look interesting. im interested to see what people say about these. i wonder if they would be good for a turbo motor

that motor almost gives you a boner just lookin at it.

oh and also, i found a map for a gt25 and it seems our engines work well with them. it has an estimated output of 470 hp at 7000 rpm (prob at the crank). i know this is a more expensive route, but probobly would be cheaper than twin turbos. you all think this would be easier/better. i know im probobly asking a little bit much of you all, but im just trying to get some discussion here.

thanks for your info guys, i will try and dimension the bay out and all the components necessary using my newly found engineering skills! (1 semester outta the way) and write up a price list. after seeing what i might have to do i might go for a .63 trim t3/t4 turbo. that seems to be the best trim compressor for our motors.

i can stand not going over 14-15 psi if i had twin turbos. but i might as well just upgrade the wheels. im fine with the plumbing, i know its a pain in the a$$. but thanks for the info on trying to find a person to make a manifold around my town. i just found out the turbos are t28s. i know how to map my engine on one turbos compressor map, but when you do two, what happens? and also would t28's be good for my motor? i probobly wont be going over 15 psi, and i have the specs listed above. L28 motor with flat top pistons, rebuilt p90 head, 500cc injectors, megasquirt efi.

oh and would anyone be able to make one of these manifolds for me? im sure i could probobly do it but id rather not. thanks

thanks guys. around t25s you say? yes ive heard that steel wheels would be the way to go with them. 300kw is around 411 horsepower correct? that would be plenty for me. i know i would get great responce in the lower rpm. but ive heard small turbos can be a restriction at high rpm. would this be a problem for me? i like to go fast on the highway. or would it just be so cool and fun that i wouldnt care/notice. oh and thanks for the insight on the ebay turbos. the one i was looking at did not look that bad but yes, i was thinking of stuff like that. i will go name brand. thanks paul Oh, and i was wondering. does anyone have or is able to make the manifold i would need? if not how would i set this up. i believe that this would be the hardest part. im sure a skyline manifold does not match up. but that would be great if it did! but anyways, anyone know about that part of it? I found a replica of the Trust Twin Turbo manifold. would this fit on our motor? http://935motorsports.com/catalog/product_info.php?products_id=1036&osCsid=f8b3dd7285e674665bf4ce79d21b5cc5

im not sure man. Does anyone know what kind of turbos these actually are? im trying to go ebay to just buy two of the same turbos, or could i buy one big and one small or something? im just rambling on basically but that would be possible wouldnt it? with right plumbing. oh and by the way, i was just looking at ebay, would these ebay special turbo chargers be ok for what im doing? i dont plan on ever going over 18 pounds and probobly wont even go over 14. it says they has forged turbine wheels or something. http://cgi.ebay.com/ebaymotors/New-T3-T4-T04E-Turbocharger-A-R-63-stage3-turbo_W0QQcmdZViewItemQQcategoryZ36475QQitemZ8022414491QQrdZ1 i know a garrett or something would probobly be better, but i want .63 a/r compressor and stuff. and that was around 500 bucks. this is a little under 300. is that 200 extra really worth it for the name? or do you all think the quality is much much better. im hoping someone has gone this ebay route. id rather not have an internal wastegate which this one looks like it has, but i guess that eases plumbing. oh and one of these would be for a single turbo.

definately man, sounds good just hope some people post up some maps or sum info about this s#$*.

alright thanks man, any thoughts about those off the top of your head though? And by the way, hows tokyo?

Hey i know this has probobly been asked before, but i couldn't find it with the search. in my long hours at work. (10-7). i come up with various routes and exotic setups for my Z. I have an L28 motor with flat top pistons P90 Head Megasquirt and 500cc injectors and NPR intercooler. Im wondering if this setup would be enough airflow to push two r32's. I could not find the compressor maps for this. Thanks.

thats cool as S***. let us know how it handles!

well for around 300-500 bucks you can have a full setup. 300 for diy. 500 for prebuilt. price depends on options and what you want. for instance i am building one with a palm pilot system viewer (only extra cost is the palm itself). you can use a laptop if you want. change fuel, spark, everything pretty much. cheapest ive seen anywhere else is 500-2000 and i cant really see many differences.

like we were saying, you can, you just need the fuel to do it with a good intercooler. but im eager to hear what cr as well.

p90a was with hydrolic lifters p90 is without i have the p90 lol! "spidey senses" i wish i had those. the car blows up before i realize i over did it. ill try getting a hold of those 440cc injectors those would be good up to 18 psi if i wanted?? or would i need 500cc? and thanks again everyone, and yes, ak-z, lol, i could get what you were saying (for the most part)

i definately agree with hakosuka, although i cant really add anything to what he is saying except that heat escapes the bay better when moving. im not completely sure but is there anyway that you could get a oil/water cooler or something for just the turbos? or at least have a switch that will increase oil/coolant flow during idle and turn a fan or something. (dunno just shooting stuff off my head) but what i didnt know that a turbo timer was actually worse. i knew it wasnt the best alternative, but i didnt know that.

oh ok. lol. im not exactly sure yet, any recommendations? this is a weekend/track/fun car and i want around 275 rwh or more. and, thanks, again =)

where can you find an aftermarket cam for turbo? i thought the duration was good enough for a turbo system so gasses arent trapped. (or something like that) but i definately agree on the engine management (MEGASQUIRT!)

im sorry guys, the head i have is a p90 head without the hydrolic lifters. after sifting through a bunch of info somehow about all the casting numbers and what was different, i led myself to believe that i had a p79 the info you all gave me was still very helpful. the p90 would be best choice? i just dled that lengine calculator http://flzclub.com/downloads.htm if anyones interested, its pretty cool. my cr is going to be around 8.7:1 . anyone happen to know how much boost i would be able to run with my setup?

i havent really seen upgraded cams for turbo because you want a longer duration with turbo motor and upgraded cams shorten that duration. if you have a good fuel delivery and decent intercooler (do you know the true efficiency?) i think you can run 14psi. you could probobly run more if your motor doesnt have that many miles on it. if you want to run more the easiest thing to do is buy maximum boost by corky bell and setup an engine like he tells you to. gaskets are a big thing in turbo motors so i would spend a little money on that. also make sure your head is in good shape. i dont believe (correct me if im wrong) that you need to to much to your bottom end because our bearings and rods and pistons are strong as ****. just make sure the gaskets (mainly head) and top end is ok and you should be able to run like 16 (with good fuel delivery)