515whp EFR6758 build
#1
515whp EFR6758 build
Just a data point, thought I'd share.
We no longer offer built engines. This one we shipped to a customer back in 2015.
TSE EFR6758
E85
84.0mm 9.0:1 pistons
Moldex billet crank
Tomei cams
Supermiata CNC BP6D head, +1 stainless intake, +2 Inconel exhaust
Carrillo H beams
Billet oil pump gears
Supermiata damper
ACL bearings
Oil pan baffle plate
Supertech heavy double valve springs
Supermiata SUBs
I think this motor still has more on tap with additional tuning. For reference, we made around 440whp with a 6258 and stock cams on a similar build.
We no longer offer built engines. This one we shipped to a customer back in 2015.
TSE EFR6758
E85
84.0mm 9.0:1 pistons
Moldex billet crank
Tomei cams
Supermiata CNC BP6D head, +1 stainless intake, +2 Inconel exhaust
Carrillo H beams
Billet oil pump gears
Supermiata damper
ACL bearings
Oil pan baffle plate
Supertech heavy double valve springs
Supermiata SUBs
I think this motor still has more on tap with additional tuning. For reference, we made around 440whp with a 6258 and stock cams on a similar build.
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#4
Based on what we have done in our shop, I think this hardware should be capable of another 100whp from 2500-4000, pull to 8,000 and peak at 560whp or so. We once briefly touched 440whp at around 5500 with stock cams with our 6258 before blowing the spark out. I'm convinced we could have hit 450~460whp with IGN1A coils, but we stopped development there. Thus, I think the 6758 with cams has a more in it.
Yarp. Tomei BP6D cams are asleep until 4500 even N/A. Stock cams will spool faster as you said.
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#5
As mentioned in the post, that plot is by no means the maximum that particular hardware combo is capable of. As Josh mentioned, stock cams will spool faster. I just posted because I haven't seen any 6758 plots here. My 420whp 6258 plot with stock cams and a few others around the same on stock NB cams is all.
Based on what we have done in our shop, I think this hardware should be capable of another 100whp from 2500-4000, pull to 8,000 and peak at 560whp or so. We once briefly touched 440whp at around 5500 with stock cams with our 6258 before blowing the spark out. I'm convinced we could have hit 450~460whp with IGN1A coils, but we stopped development there. Thus, I think the 6758 with cams has a more in it.
Yarp. Tomei BP6D cams are asleep until 4500 even N/A. Stock cams will spool faster as you said.
Based on what we have done in our shop, I think this hardware should be capable of another 100whp from 2500-4000, pull to 8,000 and peak at 560whp or so. We once briefly touched 440whp at around 5500 with stock cams with our 6258 before blowing the spark out. I'm convinced we could have hit 450~460whp with IGN1A coils, but we stopped development there. Thus, I think the 6758 with cams has a more in it.
Yarp. Tomei BP6D cams are asleep until 4500 even N/A. Stock cams will spool faster as you said.
I remember your allofit 6258 plot at 25-26psi you were making really good power on that as well.
#8
Talking to owner, they had ECU set to cut fuel and spark for rev limiter. They did a routine scoping and notice a tiny bit of det damage to one piston so they're pulling it down to put new pistons in.
I could be wrong but I suspect that fuel cut at rev limit (8400rpm) might be the culprit. Personally I always do hard spark cut on our race engines, leave fuel on. Better to have that latent heat of the fuel mass doing some work cooling bits off on overrun IMO.
Made a few other suggestions on tune WRT to spark, VVT and a few other tables. Curious to see how much more they can get out of it.
I could be wrong but I suspect that fuel cut at rev limit (8400rpm) might be the culprit. Personally I always do hard spark cut on our race engines, leave fuel on. Better to have that latent heat of the fuel mass doing some work cooling bits off on overrun IMO.
Made a few other suggestions on tune WRT to spark, VVT and a few other tables. Curious to see how much more they can get out of it.
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#9
Talking to owner, they had ECU set to cut fuel and spark for rev limiter. They did a routine scoping and notice a tiny bit of det damage to one piston so they're pulling it down to put new pistons in.
I could be wrong but I suspect that fuel cut at rev limit (8400rpm) might be the culprit. Personally I always do hard spark cut on our race engines, leave fuel on. Better to have that latent heat of the fuel mass doing some work cooling bits off on overrun IMO.
Made a few other suggestions on tune WRT to spark, VVT and a few other tables. Curious to see how much more they can get out of it.
I could be wrong but I suspect that fuel cut at rev limit (8400rpm) might be the culprit. Personally I always do hard spark cut on our race engines, leave fuel on. Better to have that latent heat of the fuel mass doing some work cooling bits off on overrun IMO.
Made a few other suggestions on tune WRT to spark, VVT and a few other tables. Curious to see how much more they can get out of it.
How much damage on the piston? Probably slightly deformed on the intake side I'm guessing.
#13
If you haven't already, I'd start a new thread on your tuning questions. I'd want to see screen caps of VVT table, VVT settings, Ignition, boost duty, fuel, AFR targets, injection timing, rev limiter settings and pic of intake... in a new thread.
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#20
Tune is not mine to share. But yeah, on paper, this combo should make a bunch more up top and spool faster as well.
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