280whp @ 12psi on '99twins, safe tune
#26
sherevvs
iTrader: (18)
This is a good thread. I am swapping a 99 spec twins set soon into my 94 touring with reman engine with 65k. There has been one question that has been bothering me: If the boost level is the same for the 99 and stock twins, where does that extra hp come from? 280hp-255stock hp=25 extra hp. Is it from the fast spooling of the lower rpm range to transfer more air into the working chamber? ummm.....
#28
sherevvs
iTrader: (18)
we should have a special place under 3rd gen for those who just want to do 300whp on stock or Efini twins and make the engines last for over 100K miles..
My question is still not answer though......if we run 99 spec twins but keep the stock boost level 10-8-10, do we get the 99 spec twins 280 hp or that will just be limited to 255 hp by the stock boost level?
My understanding is the 99 spec twins spool fast so that will give the car some hp and torque but the throttle would be more responsive and revs faster, which results in earlier boost therefore faster 0-60?
any thoughts?
My question is still not answer though......if we run 99 spec twins but keep the stock boost level 10-8-10, do we get the 99 spec twins 280 hp or that will just be limited to 255 hp by the stock boost level?
My understanding is the 99 spec twins spool fast so that will give the car some hp and torque but the throttle would be more responsive and revs faster, which results in earlier boost therefore faster 0-60?
any thoughts?
#30
we should have a special place under 3rd gen for those who just want to do 300whp on stock or Efini twins and make the engines last for over 100K miles..
My question is still not answer though......if we run 99 spec twins but keep the stock boost level 10-8-10, do we get the 99 spec twins 280 hp or that will just be limited to 255 hp by the stock boost level?
My understanding is the 99 spec twins spool fast so that will give the car some hp and torque but the throttle would be more responsive and revs faster, which results in earlier boost therefore faster 0-60?
any thoughts?
My question is still not answer though......if we run 99 spec twins but keep the stock boost level 10-8-10, do we get the 99 spec twins 280 hp or that will just be limited to 255 hp by the stock boost level?
My understanding is the 99 spec twins spool fast so that will give the car some hp and torque but the throttle would be more responsive and revs faster, which results in earlier boost therefore faster 0-60?
any thoughts?
#33
Full Member
iTrader: (2)
I guess you can subtract 50hp that gets lost in the drivetrain making it around 320whp.. My impression is that european donynumbers are more conservative than the American ones. 320rwhp on stock twins @ 14psi are numbers that wouldnt add up on european dynos. A friend of mine pulled 320rwhp on stock twins @ 17psi. That sounds more realistic. However, His twins lasted for about 1 month before they crashed and had to be replaced. He didnt do that again...
#34
Senior Member
iTrader: (11)
This is a good thread. I am swapping a 99 spec twins set soon into my 94 touring with reman engine with 65k. There has been one question that has been bothering me: If the boost level is the same for the 99 and stock twins, where does that extra hp come from? 280hp-255stock hp=25 extra hp. Is it from the fast spooling of the lower rpm range to transfer more air into the working chamber? ummm.....
As an FYI the last FD I had was running 99 spec twins on a streetport block plus usual bolt-ons and pulled 332 rwhp
Last edited by TomSmy; 07-03-17 at 05:47 PM. Reason: added dyno sheet picture
#35
Rotary Motoring
iTrader: (9)
No, 99 spec has smaller exhaust wheels.
Though, the 1mm smaller 99 spec exhaust wheels were longer to improve their exhaust flow capabilities.
Still, when one gets a high flow-ed hybrid turbo in Japan they always use the old larger exhaust wheel turbos as a base (which I doubt they would do if the 99 exhaust wheels flowed more).
http://www.rx7.net.nz/turbodia.JPG
http://www.rx7.net.nz/turboseal.JPG
'99 FD3S
Though, the 1mm smaller 99 spec exhaust wheels were longer to improve their exhaust flow capabilities.
Still, when one gets a high flow-ed hybrid turbo in Japan they always use the old larger exhaust wheel turbos as a base (which I doubt they would do if the 99 exhaust wheels flowed more).
http://www.rx7.net.nz/turbodia.JPG
http://www.rx7.net.nz/turboseal.JPG
'99 FD3S
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