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i want some suggestions on what to do with sr20de engine that will make it run 12sec around 300hp and then possibly work with a turbo down the road......
300hp correct me if i am wrong but i think you will definately need a turbo to acheive 300hp there will be no turbo down the road turbo will be your only way to have 300hp.
had to comment on the title of this thread.. just reminds me too much of gran turismo haha
these are the steps they took to make the claim of 300 hp n/a
its really quite simple
#1 open mouth
#2 lie
and youre all done
The only NA 300hp SR20DE is the BTCC Primera, run-a-few-times-tear-down-race-only motors. Andreas has come close with 200-something without VVL. The SR20VE will get you 200 by itself.
The question is... is 300 an arbitrary number that sounds good to you, or have you been in a 200hp SE-R? Pretty freakin fast.
Hell, my 160hp NA makes me grin all the time. 2400lbs isn't a lot to move.
My advice; commit to NA or turbo beforehand. Everyone on these boards who does NA then goes turbo wonders why they wasted money on NA. I guess I'll see...I got most of the parts, but none of the time.
__________________
Louis
1991 Nissan Sentra SE-R w/SR20VE
The most WHP I think I can get right now which would be a full race motor would be about 250-260 WHP. To get that number compression would be about 15 to 1. This motor would be far from streetable. I would also have to rev the piss out of the motor. Cams would have to be on the 290-304 degree duration. The best I think one could posibly get would be 215-220 WHP on a DE streetable and 230- 235 WHP on a VE streetable. We are talking $7500 invetment plus on these motors. A full race motor I think I could get 250-260 WHP on a DE and 270-280 WHP on VE but the cost would be way past $10,000 for a NA motor and the motor would have to be pulled down and checked every 5,000 miles or so and you would have to running around with C16 everywhere you go. A turbo motor with a $5000 investment would run mid to low 12s. Remeber I can build some of these motors because parts are cheaper for me and there is onlu my time to build the motor.
if i port and polish,balance and bluprint, bore and stroke 20 over have a custom intake (NISMO) exhaust (HKS) honned intake new injetors and a 3z fuel pump with a rebuilt tranney and ACT clutch. most of the parts are intrchangeable with a T-25 turbo setup with a front mounted intercooler and custom piping and exhaust manifold i could easily run or even break 12's. am i wrong
tell me what you think of that, good idea/bad idea!!!!!
Trust me all motor IMO is too much money for way less power!!!!!!
when you can spend 2k on a w11 avenier at 230 hp stock with FMI, get a bigger FMI and upgrage *** turbo and you should be good for about 280 plus hp at high boost.Thats what I'll be doin soon!!!!!!!!
yes the only way to go is turbo if you want that much power unless you want andreas to build you a 10,000 monster motor but like i said before the only way you ever gonna reach 300hp and definately the cheapest way is turbo.
300hp at flyhweel out of n/a is possible. but not as a daily driver no way. u would need quite high compression so , if u are going to get it n/a then u would have to change it all done the track to turbo? i say do something right the first time.
but yes it u want 300hp na then it can be done. not easily like a turbo setup.
this is my first post to this message board, I saw the question about how to make 300 horsepower on a SR-20 motor.
it can be reasonably done using either a turbo or naturally aspirated build up.
all you need to do is use some math, and make some assumptions.
the combustion process follows the laws of Thermo dynamics and chemistry, you can calculate what is needed get 300 horsepower.
the primary thing that you need is break specific fuel consumption, a high compression SR-20DE would have a BSFC close to 0.45, which would require 150 Lb of Gasoline to make 300HP for 1 hour
Next assuming a mixture of 12.5 :1 to give optimum power we now know we need 1875 Lb of air / hr
with air having a density of 0.0742 lb/cf we will need about 375 CFM minimum.
to flow that much air a 2 L SR-20DE would need to spin at close to 11,000 RPM assuming efficient air flow!
that kind of flow rate would require for individual velocity stack intakes with butterfly valves on each intake. extremely large valves, and a tuned exhaust. And a custom ground long duration cam
while not impossible, it would be expensive and difficult. another significant problem would be drive ability, most likely you would have trouble keeping idle below 2000
a turbo charger producing 18-22 PSI manifold pressure, using a good intercooler, will produce similar results. without having to rev the engine beyond 7000. the only thing that is lost is a turbo BSFC is much higher, between 0.55 - 0.6. in an endurance race that would make a difference in fuel consumption and pit stops, potentially giving the NA car a slight advantage
but like i said before the only way you ever gonna reach 300hp and definately the cheapest way is turbo.
