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· Nis-ho
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635 Posts
Discussion Starter · #1 ·
i may get flamed for asking this, but i did search

well it looks like i'll be going turbo for my GA16DE. i kno mike and others turboed their GA's but, isn't the 10.6 compression on the motor kinda high. i mean i kno they've had lots of success, but it just scares me to run boost on that kind of compression.
 

· Nis-ho
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635 Posts
Discussion Starter · #7 ·
so how long do you guys think a GA would last under boost? i'll be honset, i do very cautiously, and usually don't exceed 3k rpm, or go over 70-75 mph. i put anywhere btw 350-400 miles a week, and i only fill up once a week. so i am a conservative driver, but, i do have my share of hooliganisms :fluffy:
 

· Registered
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2,490 Posts
The higher the compression ratio, the lower the boost you can safely run without detonation. If you stay conservative, a boosted engine is very reliable. I would say a good starting point would be around 6psi provided you get a properly sized turbo, a good engine management system, a properly sized front intercooler, upgrade the injectors and fuel pump, and set the timing properly. It should be good for about an additional 50WHP.

Lew
 

· Have I Hit 12's Yet?
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6,879 Posts
i daily drive mine on 11 psi and havent had a problem yet with the motor
 

· i pwn your mom
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8,508 Posts
many of the turboed Ga's haven't had problems, when you do stuff properly then you shouldnt' run into issues, read the sticky above on turboeing the car and look on nissanperformancemag.com, that will help you too...
 

· Nis-ho
Joined
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635 Posts
Discussion Starter · #11 · (Edited)
trust me man, i read practically all the posts, and all the npm articles, i'm sorry, i cant help but be paranoid

i can only hope that i dont sound like a :dumbass:

my sincerest apologies

btw ishadoff, the thought of 50whp makes me drool gggghhhhhaaaaaa!!!!! mmmmmm....turbolicious
 

· Registered
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286 Posts
lshadoff said:
The higher the compression ratio, the lower the boost you can safely run without detonation. If you stay conservative, a boosted engine is very reliable. I would say a good starting point would be around 6psi provided you get a properly sized turbo, a good engine management system, a properly sized front intercooler, upgrade the injectors and fuel pump, and set the timing properly. It should be good for about an additional 50WHP.

Lew
At only 6 psi, an intercooler will hinder performance, the pressure drop and extra intercooler piping will hurt more than help. Until you get to about 8 psi or so, an intercooler will hurt. For such a low boost application, I would get a small liquid/air heat exchanger (like those bullett style ones) and make the piping as short as possible. With such high compression, the spool will be almost negligible. Keep it sleeper, and go faster... Small intercooler will do fine. Your outlet temp is not going to be 350 degrees at 6 psi, it will be <200, so REALLY don't get a bigass intercooler. I built a friend's SOHC honda civic (2003) the same way. High compression, low boost, non intercooled, and he runs .4 bar just fine. Don't take my word for it, do some research and find out for yourself. A huge intercooler will raise the RPM you reach full boost by up to 1000 RPM. Be careful, and have the fuel you need (upgrade the pump first, and increase fuel pressure a bit) and maybe invest in an S-AFC and make yo self a mean ass car.
 
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