BorgWarner EFR 8374 IWG Dyno Results
#251
My fd has a large street ported motor atm and an Adaptronic Select ECU.
So, if I get a twin scroll internally gated EFR 8374 with Turblown's shorty manifold and custom vmount how early would my car hit boost? My goal is 3k. is that achievable?
#253
Thanks for replying man.
As much as European 100 octane fuel can provide safely. I'm guessing around 16-17 psi?
If you consider the following how early would a 7670 and an 8374 hit full boost at 16 psi?
Just to see if the extra time to spool up is worth it.
As much as European 100 octane fuel can provide safely. I'm guessing around 16-17 psi?
If you consider the following how early would a 7670 and an 8374 hit full boost at 16 psi?
- Large street port
- Adaptronic select ECU
- Turblown Shorty manifold
- IWG
- Custom vmount
- 3 inch decat exhaust
Just to see if the extra time to spool up is worth it.
#254
Both the EFR 7670 and 8374 will hit 16psi around 3,000-3,400rpm on a 2 rotor depending on mechanical set-up, boost control/tuning, elevation, weight of car, gear, etc.
The 7670 will have slightly faster response, but the 8374 is no slouch.
Here is a boost by rpm chart of my 7670 on a dyno dynamics. Boost came on a tad faster on Dynojet (26psi peak boost 3,800rpm on Dynojet instead of 4,000rpm on DD) and the street from more load I guess.
The 7670 will have slightly faster response, but the 8374 is no slouch.
Here is a boost by rpm chart of my 7670 on a dyno dynamics. Boost came on a tad faster on Dynojet (26psi peak boost 3,800rpm on Dynojet instead of 4,000rpm on DD) and the street from more load I guess.
#255
So you made 360whp with the 7670 at 26 psi?
We don't get e85 over here so 100 octane pump has is what i'll have to go with. i'd love if the 8374 reached 16 psi by 3400. I hear the 7670 is kind of weaker in terms of top end compared to the 8374. How does it feel on the road?
We don't get e85 over here so 100 octane pump has is what i'll have to go with. i'd love if the 8374 reached 16 psi by 3400. I hear the 7670 is kind of weaker in terms of top end compared to the 8374. How does it feel on the road?
#256
So you made 360whp with the 7670 at 26 psi?
Yes, with the EFR 7670 I made 369hp on the Dyno Dynamics peaking at 26psi (fading to 21psi boost at peak hp).
I parked the car and the next weekend i did 420rwhp on a Dynojet again peaking at 26psi and fading to 21psi at peak hp.
#257
I hear the 7670 is kind of weaker in terms of top end compared to the 8374. How does it feel on the road?
On high boost where I maxed the compressor flow out the EFR 7670 "lacking in high rpm power" on the street since like a piston engine car torque drops so fast after 5,000rpm. The EFR 8374 would provide more top end power with plenty of response and low end power when downshifting is always an option. My EFR 7670 build was for "racing" in a parking lot in 2nd gear.
Remember terms like "lacking in power" are relative as when I tried high boost 4th gear freeway roll on on my 225/50-16 Hankook RS3 street tires it blew the tires of ~4,500rpm. On 255 DOT-R tires warmed up it held traction well in 3rd and up and on 255/55-16 MT Street drag radials warmed up and 12psi pressure it held traction in 2nd gear and up with gentle shifts.
I think EFR 8374 is the right turbo for 90% of 2 rotors.
#260
#261
^ get the 7670 or a v8 then. Also it depends on your definition of usable - the 8374 will get you around town at 3000 pretty bloody smartly. But if you want the same power and torque at 3000 as at 5000 forget about it. But if you are driving it in anger you wont be at 3000 rpm very often.
I was torn between the two turbos too - i didnt really neeeed 450hp, and wanted plenty of torque down low, but the 8374 just fit the engines breathing characteristics better and i like the idea of the compressor and the exhaust flowing better and more efficiently.
Some times i think id like to try the 7670. The 8374 is pretty good though. Sorry to be of no help lol.
I was torn between the two turbos too - i didnt really neeeed 450hp, and wanted plenty of torque down low, but the 8374 just fit the engines breathing characteristics better and i like the idea of the compressor and the exhaust flowing better and more efficiently.
Some times i think id like to try the 7670. The 8374 is pretty good though. Sorry to be of no help lol.
#262
I know this is a super tough choice for a 2 rotor- EFR 7670 or EFR 8374.
Both turbos can make ~300ftlbs torque at 3,000rpm and 16psi boost on the 2 rotor so you have to decide if making a bit more peak power (8374) or having that 300ftlbs available some thousandths of a second sooner after pressing the gas (7670) is more of a priority.
If making more than ~300ftlbs torque at 3,000rpm is the priority you might want to look at even smaller turbos like EFR 7163 or a bigger engine.
Both turbos can make ~300ftlbs torque at 3,000rpm and 16psi boost on the 2 rotor so you have to decide if making a bit more peak power (8374) or having that 300ftlbs available some thousandths of a second sooner after pressing the gas (7670) is more of a priority.
If making more than ~300ftlbs torque at 3,000rpm is the priority you might want to look at even smaller turbos like EFR 7163 or a bigger engine.
#263
Original Gangster/Rotary!
iTrader: (213)
Vs. the 7670 I agree with that statement
My (completely non-EFR, lol) PT6466 is very responsive, surprisingly so (although the system was set up to optimize response)...... I need to take some logs of the boost response
My (completely non-EFR, lol) PT6466 is very responsive, surprisingly so (although the system was set up to optimize response)...... I need to take some logs of the boost response
#265
Banned. I got OWNED!!!
Why are you in such a high gear? What are you doing? You do realize fuel economy is better at higher RPM, low load, and transmission lifespan is better there too. If you keep lugging a motor around, expect issues...
#266
You can definitely make 400rwhp at 16psi on the 7670 kit.
Generally if you have a medium to a large streetport the 8374 will fit the engine characteristics better.
Stock/small streetport 7670 does really well 3-400rwhp.
http://www.youtube.com/watch?v=WPchlUuNx1M
Generally if you have a medium to a large streetport the 8374 will fit the engine characteristics better.
Stock/small streetport 7670 does really well 3-400rwhp.
http://www.youtube.com/watch?v=WPchlUuNx1M
Think I'm leaning towards the 8374 now.. The thing is though, what other mods can you do besides those i've already mentioned to minimize lag on this turbo?
Do you guys have a dyno of an 8374 streetported fd at 16psi?
#267
I'm not driving the car wrong lol I know rotaries like high revs I just want usable power in the streets and a broad curve, it's not a racecar or a drag car. It's a street car. In street car situations a car that makes 350hp for most of its rpm range is "faster" and more enjoyable than a car that makes 500hp at 6000rpms. You get my point.
#269
Well excuse my english (not my native language) I couldn't explain it any better. I'll try this. I prefer power that is distributed broadly in the rpms rather than no power until 5000 and then boom. And from what i've seen in street situations unless you're drag racing the first example feels faster.
#274
Yes but that is dependent of where in the RPMs do you mash the throttle? I mean if it's 1500 or 3500 there should be a huge difference I guess.
#275
My car is a large street port, it even sort of braps lol.
Think I'm leaning towards the 8374 now.. The thing is though, what other mods can you do besides those i've already mentioned to minimize lag on this turbo?
Do you guys have a dyno of an 8374 streetported fd at 16psi?
Think I'm leaning towards the 8374 now.. The thing is though, what other mods can you do besides those i've already mentioned to minimize lag on this turbo?
Do you guys have a dyno of an 8374 streetported fd at 16psi?