7875 + 5.9 + E85 + Megasquirt

[TT5.9mag]

The trans is old. I’ve been running it for about 8-10 years. It probably needs to be freshened. Converter is new. Circle-D , built for boost though it’s possible it’s not up to the task.

The fact that there is no rpm drop on the log shows that the converter is not pulling the engine down after a shift. If the trans is slipping the fluid will be absolutely smoked. Are you making more power than circle d was aware of?

 

[turbovan]

Duty cycles climbs from 10% at launch until 67% at the end of the run. It's hard to see rpm drop during the shifts. There is a spike to 6500 and drop to 6000 where the 2-3 should have happened but it could have been wheel spin or the trans slipping. I don't have an easy way to log shifts in the Megasquirt but I'm sure it could be done with some kind of output on the shifter.
Not sure what my next move is. I wanna go faster. I'm teetering between pulling this whole platform out and throwing in an LS or dumping a bunch of money into this 727 to give it a trans brake and necessary upgrades to support that.
View attachment 1716489702

Does look like converter, but still check the trans pan.

I could have a forged LS and built 4l80 for the money I’ve sunk into my trans/converter alone. I wish I did. If I could get 1/2 the money I put into my engine/trans I’d make the move yesterday.

 

[subcom]

Does look like converter, but still check the trans pan.

I could have a forged LS and built 4l80 for the money I’ve sunk into my trans/converter alone. I wish I did. If I could get 1/2 the money I put into my engine/trans I’d make the move yesterday.

That’s exactly where I am. This somewhat low dollar Magnum build has really delivered but I don’t feel it can go a whole lot further reliably.

 

[subcom]

Fluid is pristine clean at the dipstick. Not ready to drop the pan just yet. I was about a qt and a half low.

 

[DNasty777]

You can use a linear pot to log shifter position. Alternatively, time for an 8HP swap.

 

[subcom]

You can use a linear pot to log shifter position. Alternatively, time for an 8HP swap.

So want to do an 8HP!
Nobody is making the flex plate though for a SBM.

 

[TT5.9mag]

Fluid is pristine clean at the dipstick. Not ready to drop the pan just yet. I was about a qt and a half low.

That’s a sign.
What fluid are you using?

 

[subcom]

That’s a sign.
What fluid are you using?

Lucas Hygard with a splash of normal fluid to give it some color.

 

[TT5.9mag]

Lucas Hygard with a splash of normal fluid to give it some color.

Damn that’s what I was going to suggest.

 

[subcom]

Damn that’s what I was going to suggest.

Lol. I’ve been running that stuff for several years now.

 

[Toluene56]

Are you using the thicker hygard? I think there is the low viscosity j20d and I think the thicker(standard) is j20c

 

[DNasty777]

So want to do an 8HP!
Nobody is making the flex plate though for a SBM.

Reach out to Domiworks, last I heard they were taking up the mantle.

 

[subcom]

Reach out to Domiworks, last I heard they were taking up the mantle.

I’ve heard the same thing. Been keeping an eye on their website.

 

[subcom]

Are you using the thicker hygard? I think there is the low viscosity j20d and I think the thicker(standard) is j20c

I’ve been using this Lucas stuff.

 

[85glht]

So want to do an 8HP!
Nobody is making the flex plate though for a SBM.

Not yet.