Efr 8374 vs Efr 8474
#1
Junior Member
Thread Starter
Efr 8374 vs Efr 8474
Quite surprised no one is talking about this subject , I think Turblown said a while back they were going to post a Dyno to compare but never actually did .Is the difference in lag big ? I started by considering the 7670 but then I was swayed towards the 8374 so now I really don’t know if I would sacrifice even more responsiveness ; plus I heard that the 8374 is more suited for a 13B
Thanks
Thanks
#2
The bomb is in the toy!1!
iTrader: (4)
This thread compares the 8374 and 8474 pretty extensively - https://www.rx7club.com/single-turbo...hread-1138737/
#3
Junior Member
Thread Starter
This thread compares the 8374 and 8474 pretty extensively - https://www.rx7club.com/single-turbo...hread-1138737/
#4
Rotor or no motor
iTrader: (24)
Quite surprised no one is talking about this subject , I think Turblown said a while back they were going to post a Dyno to compare but never actually did .Is the difference in lag big ? I started by considering the 7670 but then I was swayed towards the 8374 so now I really don’t know if I would sacrifice even more responsiveness ; plus I heard that the 8374 is more suited for a 13B
Thanks
Thanks
In theory the 8474 will outflow the 8374. by how much exactly in the real world. it is hard to say
I have been plenty happy with my 8374. response is just phenomenal.. the 8474 might be a little laggier but i dont think it will be a substantial difference between the 2
#6
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RW Atelier (07-20-20)
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#8
Rotor or no motor
iTrader: (24)
i would try to attempt 500whp in an fc since people say that after you have to throw a lot of money to strengthen the internals but from what I gathered is that the new “versions” of the turbos are better for maxing out . I’ve read somewhere that if you’re hellbent on 600whp and not willing to use an Efr 9xxx , then the 8474 is the better turbo , so yea , I think I’d go with the 8374 too.
#10
You can't have the best of all worlds. If they made a turbo that had a lightning quick spool and makes 450 rwhp on only 13-14 psi, i'm sure we'd all own it.....
If you only ever want to make 400-450, I would go 8374. If you want to make 500+, I would go for the 9180 (or 8474).
If you only ever want to make 400-450, I would go 8374. If you want to make 500+, I would go for the 9180 (or 8474).
Last edited by strokercharged95gt; 07-15-20 at 10:05 AM.
#11
Rotary Enthusiast
iTrader: (5)
I do have large street ports. With the sxe362 The car made 393 whp on dynodynamic at 13psi. My only expectation would be faster spool and a little bit more torque than 300. I have water/meth injection, but for safety only. If I have to go up to 15 psi its not big deal. I am realy excited about it, especially to see how it will behave with different turbo manifold.
#12
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You can't have the best of all worlds. If they made a turbo that had a lightning quick spool and makes 450 rwhp on only 13-14 psi, i'm sure we'd all own it.....
If you only ever want to make 400-450, I would go 8374. If you want to make 500+, I would go for the 9180 (or 8474).
If you only ever want to make 400-450, I would go 8374. If you want to make 500+, I would go for the 9180 (or 8474).
400whp on dynodynamic dyno (maybe 440rwhp dynojet). I am almost sure I can achive 450 on 14psi on dynoyet, but i am going to use the same dynodynamics dyno that I have been using.
Aaaanyway thats all the power I want thats why I chose the 8374.
#13
Eh
iTrader: (56)
The turbo is just one variable of the equation in any set up. I dont know how much you know or are informed, but efr are the fastes spooling turbo you can get and provide great power. Again, it depends on your set up.
400whp on dynodynamic dyno (maybe 440rwhp dynojet). I am almost sure I can achive 450 on 14psi on dynoyet, but i am going to use the same dynodynamics dyno that I have been using.
Aaaanyway thats all the power I want thats why I chose the 8374.
400whp on dynodynamic dyno (maybe 440rwhp dynojet). I am almost sure I can achive 450 on 14psi on dynoyet, but i am going to use the same dynodynamics dyno that I have been using.
Aaaanyway thats all the power I want thats why I chose the 8374.
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KNONFS (07-20-20)
#14
Rotary Enthusiast
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I highly suggest you stop comparing dyno numbers and go to a drag strip. A legit 400 whp FD on old school dyno dynamics before all the software upgrades to skew numbers to compete with dynojet would trap 130+mph easily in the 1/4. On 14psi on a 62mm turbo you are going to be lucky to trap 125mph. EFRs have drastically changed the driving experience on the street and make a great power curve but have not changed top end power. Actually, the same size precisions seem to have a noticeable advantage on top end power.
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djseven (07-15-20)
#15
Can't wait to see your results
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Vicoor (07-24-20)
#19
Rocket Appliances
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I highly suggest you stop comparing dyno numbers and go to a drag strip. A legit 400 whp FD on old school dyno dynamics before all the software upgrades to skew numbers to compete with dynojet would trap 130+mph easily in the 1/4. On 14psi on a 62mm turbo you are going to be lucky to trap 125mph. EFRs have drastically changed the driving experience on the street and make a great power curve but have not changed top end power. Actually, the same size precisions seem to have a noticeable advantage on top end power.
They're great turbos that have alot of engineering and analysis driving their design, but all of that was geared towards supporting the larger market of piston motors. If they were to put the same stock in designing an EFR line for rotary engines, the hot sides would be vastly different.
Does it spool low? Sure... but at the expense of high rpm power, which is where you win with these engines. 500 rpm of faster spool will still have you forking money over to the vette guy who has instant torque but can't pull up top.
Skeese
#20
Rotary Motoring
iTrader: (9)
I see people saying the EFRs dont pull up top and it makes my head explode...
So you buy a 420hp sized EFR 7670 or a 550hp sized EFR 8374 or a 700hp sized EFR 9280
And then you complain that it makes its peak power rating too LOW in the rpm range?
Or are you just wishing they made a turbo rated over 700hp rotary and are retarded at explaining that?
So you buy a 420hp sized EFR 7670 or a 550hp sized EFR 8374 or a 700hp sized EFR 9280
And then you complain that it makes its peak power rating too LOW in the rpm range?
Or are you just wishing they made a turbo rated over 700hp rotary and are retarded at explaining that?
#21
Rotary Enthusiast
iTrader: (5)
I can see where this is going.. another useless. Whay if this turbo,? What if max power? What if its not perfect?
roll with what you love..
Me, personaly i want it for the street at about 400hp with faster spool than my 362sxe at the same psi. am I going to accomplish my goal?..I almost sure.
All comes down to the purpose of the car.
In my case is perfect for me.
And who is talking about racing vettes?
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