na to turbo
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Joined: Apr 2006
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From: Rancho Cucamonga
na to turbo
hey i searched the forums and trying to find some info about na to turbo. i was told it could happen and know someone with the parts. waht are the numbers behind it i was thinkin of doin this or buyin a tII motor. i was told the only difference was the compression. so waht would i need, what is better. please give your opinions and any info you can list for me thank you. oh yea its a s5 na
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Joined: May 2006
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From: Oregon
this is what i heard and spyder can and probably will correct me on this one. the compression is different but (big but) the thing is a turbo engine will always be better than an na engine converted to turbo. but all that i know is the compression is different which means different rotors. i have heard of people going around with 9.4:1 compression with na rotors (which is .3 lower than na rotors) in a turbo car, of course compared to 9:1 for the stock TII.
Originally Posted by MWMburton
this is what i heard and spyder can and probably will correct me on this one. the compression is different but (big but) the thing is a turbo engine will always be better than an na engine converted to turbo. but all that i know is the compression is different which means different rotors. i have heard of people going around with 9.4:1 compression with na rotors (which is .3 lower than na rotors) in a turbo car, of course compared to 9:1 for the stock TII.
the compression ratios are different between NA and Turbo
Also NA is a 6 port motor and a turbo is a 4 port
s4 NA- 9.4:1
s5 NA- 9.7:1
s4 T2- 8.5:1
s5 T2- 9.0:1
actually a NA motor turboed will make more hp than a stock port turbo motor with the same mods.... higher compression ratio= more power per psi, and also the NA 6 port block overall has a larger port area than a t2 motor.
now i dont know if id trust turboing a s5NA motor, as the compression is quite high, things like tuning would need to be alot more cititical.
IF you dont have parts and time laying around. then id suggest just doing a turbo II swap. that would be the easiest solution.
however i made due with what i had when i had no good t2 engine but wanted some boost again...
Last edited by KompressorLOgic; Nov 10, 2006 at 01:36 AM.
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Joined: May 2006
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From: Oregon
Originally Posted by kompressorlogic
im running NA-T right now,
the compression ratios are different between NA and Turbo
Also NA is a 6 port motor and a turbo is a 4 port
s4 NA- 9.4:1
s5 NA- 9.7:1
s4 T2- 8.5:1
s5 T2- 9.0:1
actually a NA motor turboed will make more hp than a stock port turbo motor with the same mods.... higher compression ratio= more power per psi, and also the NA 6 port block overall has a larger port area than a t2 motor.
now i dont know if id trust turboing a s5NA motor, as the compression is quite high, things like tuning would need to be alot more cititical.
IF you dont have parts and time laying around. then id suggest just doing a turbo II swap. that would be the easiest solution.
however i made due with what i had when i had no good t2 engine but wanted some boost again...
the compression ratios are different between NA and Turbo
Also NA is a 6 port motor and a turbo is a 4 port
s4 NA- 9.4:1
s5 NA- 9.7:1
s4 T2- 8.5:1
s5 T2- 9.0:1
actually a NA motor turboed will make more hp than a stock port turbo motor with the same mods.... higher compression ratio= more power per psi, and also the NA 6 port block overall has a larger port area than a t2 motor.
now i dont know if id trust turboing a s5NA motor, as the compression is quite high, things like tuning would need to be alot more cititical.
IF you dont have parts and time laying around. then id suggest just doing a turbo II swap. that would be the easiest solution.
however i made due with what i had when i had no good t2 engine but wanted some boost again...
how reliable is the na-t? n whats the compression ratio?
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i just told u! what the compression ratios are!
s4 NA- 9.4:1 ( which is what i have), port matched the t2 manifolds to the 6 port block, and s5 turbocharger, and im using an Rtek 1.7 ecu,safc, full ehxuast and ect...
reliability depends on what you start with, if you start with a 20 yr old motor with 150K+ miles, dont expect it to last a long time....
so if u want it to last a long time id suggest not starting with a worn out tired motor...
s4 NA- 9.4:1 ( which is what i have), port matched the t2 manifolds to the 6 port block, and s5 turbocharger, and im using an Rtek 1.7 ecu,safc, full ehxuast and ect...
reliability depends on what you start with, if you start with a 20 yr old motor with 150K+ miles, dont expect it to last a long time....
so if u want it to last a long time id suggest not starting with a worn out tired motor...
I would never turbo an na motor. It is better to start with lower compression with forced induction cars. By raising boost your essentially raising compression. So with a turboed car you want a combustion chamber thats really big (low compression) so you can cram more mixture in. At least thats the dumbed down version...
yeah it will run fine on 9.4:1 just keep things alil richer than normal ,
now i woudlnt go tring to run like 20 psi on that high of compression, but its fine for lower boost levels, which is what i was aiming for.
i put down 231hp at 10psi,with my A/F in the 11's. on a NA motor with about 200K miles on it haha. :-)
at that lil rx7 dyno day we had last spring, as a reference a 350z only did 220 on the same dyno that day. i was quite impressed
now i woudlnt go tring to run like 20 psi on that high of compression, but its fine for lower boost levels, which is what i was aiming for.
i put down 231hp at 10psi,with my A/F in the 11's. on a NA motor with about 200K miles on it haha. :-)
at that lil rx7 dyno day we had last spring, as a reference a 350z only did 220 on the same dyno that day. i was quite impressed
Last edited by KompressorLOgic; Nov 13, 2006 at 01:54 AM.
Originally Posted by kompressorlogic
yeah it will run fine on 9.4:1 just keep things alil richer than normal ,
now i woudlnt go tring to run like 20 psi on that high of compression, but its fine for lower boost levels, which is what i was aiming for.
i put down 231hp at 10psi,with my A/F in the 11's. on a NA motor with about 200K miles on it haha. :-)
at that lil rx7 dyno day we had last spring, as a reference a 350z only did 220 on the same dyno that day. i was quite impressed
now i woudlnt go tring to run like 20 psi on that high of compression, but its fine for lower boost levels, which is what i was aiming for.
i put down 231hp at 10psi,with my A/F in the 11's. on a NA motor with about 200K miles on it haha. :-)
at that lil rx7 dyno day we had last spring, as a reference a 350z only did 220 on the same dyno that day. i was quite impressed
Thread Starter
Joined: Apr 2006
Posts: 2,371
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From: Rancho Cucamonga
hey i brought this up again im lookin at it. so i have an s5 na, would it be safe to strap on a turbo on it? and if so how much boost am i lookin at out of a stock turbo and how much do you think i could boost out of the motor and make it not go boom also if i do , do this i know with piston engines strengthening the internals are important, is that the same with rotary's? if so what should i look at before going through with it? thanks for your time !
so i have an s5 na, would it be safe to strap on a turbo on it? and if so how much boost am i lookin at out of a stock turbo and how much do you think i could boost out of the motor and make it not go boom also if i do , do this i know with piston engines strengthening the internals are important, is that the same with rotary's? if so what should i look at before going through with it? thanks for your time !
That looks broken
Joined: Dec 2004
Posts: 654
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From: WA
you could search and find oh so much information on this topic. I don't know how many folks have done it on s5's but 95% of the stuff will be the same. Don't worry about the internals. Just search, you will learn as much as you need to know.
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