BW 8374 FC Install By Turblown/TurboSource
05-03-16, 09:50 AM
#1
BW 8374 FC Install By Turblown/TurboSource
EFR IWG 8374
Big thanks to Elliot and Shawn for a great install. I put some finishing touches on it myself last weekend, including a new clutch because the new setup immediately overpowered the 10year old clutch I had in the car.
The Keg is a 10 year old Pineapple Racing Build.
The install included all the goodies they offered with their turbo kit, such as the inconnel heat shields, cast manifold, downpipe, etc
Flex Fuel Setup, air to water intercooler, retains stock S5 speed sensitive power steering and A/C.
Has not hit the Dyno yet, will post results when it does. Really happy so far.
Big thanks to Elliot and Shawn for a great install. I put some finishing touches on it myself last weekend, including a new clutch because the new setup immediately overpowered the 10year old clutch I had in the car.
The Keg is a 10 year old Pineapple Racing Build.
The install included all the goodies they offered with their turbo kit, such as the inconnel heat shields, cast manifold, downpipe, etc
Flex Fuel Setup, air to water intercooler, retains stock S5 speed sensitive power steering and A/C.
Has not hit the Dyno yet, will post results when it does. Really happy so far.
Last edited by RockLobster; 05-03-16 at 10:00 AM.
05-03-16, 08:32 PM
#6
(Terraplane)
Nicely done. Good to see more A2W installs out there.
Is that a type 20 or a type 19 IC?
You must be closed loop, hence all the overflow plumbing. Mine is routed into the head light washer tank and vents there.
Curious to see what air temps vs ambient you get.
Good luck on the dyno. Let us know those numbers.
Is that a type 20 or a type 19 IC?
You must be closed loop, hence all the overflow plumbing. Mine is routed into the head light washer tank and vents there.
Curious to see what air temps vs ambient you get.
Good luck on the dyno. Let us know those numbers.
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05-05-16, 02:11 AM
#8
05-05-16, 08:06 PM
#12
Yes, the EFR 7670 is limited to ~20psi boost at peak power on a good flowing rotary.
Try more than ~20psi boost and boost and torque will die off toward peak power.
Its a 65lb/min 57mm/76mm turbo which was considered the perfect size for a street rotary for the last 20 years... 60-1, T04S, GT3576R ringing any bells?
It is only because the EFR 8370 spools so well on a rotary that the EFR 7670 is a niche turbo for the rotary (for ultimate response at expense of some top end power compared to the EFR 8374.).
Try more than ~20psi boost and boost and torque will die off toward peak power.
Its a 65lb/min 57mm/76mm turbo which was considered the perfect size for a street rotary for the last 20 years... 60-1, T04S, GT3576R ringing any bells?
It is only because the EFR 8370 spools so well on a rotary that the EFR 7670 is a niche turbo for the rotary (for ultimate response at expense of some top end power compared to the EFR 8374.).
05-05-16, 10:12 PM
#13
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Pretty much what Blue TII said. Sure, 15-20lbs would be plenty, but eventually the power output would die off quickly (fun factor that is). I don't think 20+lbs would die off. I have a large streeported 13BT.
05-06-16, 09:20 AM
#14
Don't mean to come up as a dick, but 7200 rpms is not the redline for a 13B. Nobody is saying that the 7670 is not nice turbo, but it sure does run out of steam on the upper rpms on a stock port rotary engine. Does the turbo makes up for it in the lower rpms? absolutely!
05-08-16, 10:07 PM
#19
How low down does the 7670 spool compared to the 8374? For a car that sees track days I feel like the 8374 and under 16ish PSI (no Aux injection, maybe just water?) would be safer than pushing 20PSI with aux to get to 400 wheel on a 7670.
Thoughts?
Also thats a beautiful install!
Thoughts?
Also thats a beautiful install!
05-09-16, 02:03 PM
#20
driftxsequence How low down does the 7670 spool compared to the 8374? For a car that sees track days I feel like the 8374 and under 16ish PSI (no Aux injection, maybe just water?) would be safer than pushing 20PSI with aux to get to 400 wheel on a 7670.
Thoughts?
Also thats a beautiful install!
From what I have seen the spool is nearly the same (psi boost per engine rpm).
This is because the 2 rotor can push the EFR 8374 to compressor surge around 3,000rpms and the EFR 7670 is not near surge (needs more exhaust energy/turbo rpms).
You would have to do a T3 exhaust manifold/turbo housing or a T4 with quickspool valve with the EFR 7670 to get the full advantage of the compressor map on the 2 rotor from my experience.
From videos it looks like the turbo response is a hair quicker on the EFR 7670, but I have not driven both turbos.
Thoughts?
Also thats a beautiful install!
From what I have seen the spool is nearly the same (psi boost per engine rpm).
This is because the 2 rotor can push the EFR 8374 to compressor surge around 3,000rpms and the EFR 7670 is not near surge (needs more exhaust energy/turbo rpms).
You would have to do a T3 exhaust manifold/turbo housing or a T4 with quickspool valve with the EFR 7670 to get the full advantage of the compressor map on the 2 rotor from my experience.
From videos it looks like the turbo response is a hair quicker on the EFR 7670, but I have not driven both turbos.
05-11-16, 09:18 AM
#22
driftxsequence How low down does the 7670 spool compared to the 8374? For a car that sees track days I feel like the 8374 and under 16ish PSI (no Aux injection, maybe just water?) would be safer than pushing 20PSI with aux to get to 400 wheel on a 7670.
Thoughts?
Also thats a beautiful install!
From what I have seen the spool is nearly the same (psi boost per engine rpm).
This is because the 2 rotor can push the EFR 8374 to compressor surge around 3,000rpms and the EFR 7670 is not near surge (needs more exhaust energy/turbo rpms).
You would have to do a T3 exhaust manifold/turbo housing or a T4 with quickspool valve with the EFR 7670 to get the full advantage of the compressor map on the 2 rotor from my experience.
From videos it looks like the turbo response is a hair quicker on the EFR 7670, but I have not driven both turbos.
Thoughts?
Also thats a beautiful install!
From what I have seen the spool is nearly the same (psi boost per engine rpm).
This is because the 2 rotor can push the EFR 8374 to compressor surge around 3,000rpms and the EFR 7670 is not near surge (needs more exhaust energy/turbo rpms).
You would have to do a T3 exhaust manifold/turbo housing or a T4 with quickspool valve with the EFR 7670 to get the full advantage of the compressor map on the 2 rotor from my experience.
From videos it looks like the turbo response is a hair quicker on the EFR 7670, but I have not driven both turbos.
7670 slapped into the twin housings with a custom manifold would be dream come true.
05-11-16, 02:41 PM
#23
I think the minimal spool advantage of the 7670 is outweighed by the better flowing capabilities of the 8374. Especially as boost is raised.
I agree that the 8374 is the right match for a 2 rotor for almost everyone.
However, I would counter that it is only when boost is raised on the EFR 8374 that the compressor surge is a problem. The EFR 7670 is happy to do 25-30psi in the low rpms whereas I believe the EFR 8374 is limited by the compressor map to low/mid 20s psi there.
-------
I would say the ER 8374 is the best 300-500rhwp turbo for a 2 rotor and the EFR 7670 is the best 250-450rwhp turbo for the 2 rotor.
If you power goals are somewhere between the two (like most of us) you have to consider how you want to achieve your goals.
Do you want to run race gas and max boost to get the most low rpm torque/response?
Do you want to run more moderate boost for reliability?
Do you want to run low boost and pump gas?
If you aren't 100% sure on power goals or how you want to achieve them the EFR 8374 is definitely the answer.
I agree that the 8374 is the right match for a 2 rotor for almost everyone.
However, I would counter that it is only when boost is raised on the EFR 8374 that the compressor surge is a problem. The EFR 7670 is happy to do 25-30psi in the low rpms whereas I believe the EFR 8374 is limited by the compressor map to low/mid 20s psi there.
-------
I would say the ER 8374 is the best 300-500rhwp turbo for a 2 rotor and the EFR 7670 is the best 250-450rwhp turbo for the 2 rotor.
If you power goals are somewhere between the two (like most of us) you have to consider how you want to achieve your goals.
Do you want to run race gas and max boost to get the most low rpm torque/response?
Do you want to run more moderate boost for reliability?
Do you want to run low boost and pump gas?
If you aren't 100% sure on power goals or how you want to achieve them the EFR 8374 is definitely the answer.
05-11-16, 02:50 PM
#24
WANKfactor
According to the compressor map the 8374 is in its efficiency zone from virtually zero all the way up whereas the 7670 wants more pressure ratio so that might be part of it too.
That statement doesn't make sense. "7670 wants more pressure ratio" I wanted to run as much boost as my turbo can push for max low rpm torque, so the 7670 was still theoretically limiting me on pressure ratio... (my injectors actually limited me).
But I understand not everyone wants to run 116 octane and 2 bar boost to only make 420rwp.
I agree with your sentiment that most people want to run low pressure ratios on the rotary.
05-12-16, 06:42 PM
#25
i mean wheres the dyno of the 7670 on 93 pump and 50/50 mix. ... i guess i will do it.
im going to try e85 and pre turbo 100% water as well... with a pre turbo and post turbo pwm injections.
and then twin seq 7670s...