Anything lower than the 4.10 i have right now will be an improvement. Ive read about the mythical 3.3s...but i'm not gonna hold my breath.

 

Glad to see this coming along, especially so much work out of an apt garage!.

Makes me want to utilize my space more efficiently.

 

3.63s are good for 160+ at stock rev limit with a 6 speed. I'd say that's plenty for an open cockpit.

 

Not so much concerned with top speed, it's a street car so more interested in cruising RPM and traction.

 

Cruising rpm is a concern in an open wheel open cockpit car?

 

I think a 3.6 is the perfect ratio for this car IMO

 

I still chirp 3rd with 3.63 rear end and 110whp, so that's why I suggested even taller. But 4.10 must be brutal. Its a 15% torque reduction or something like that going from 4.10 to 3.63 that should help I guess.

 

Bald winter tires?

 

Flat shift set at 7500rpm.

 

Yeah ffs, I shift at 7100. chirped with re71rs too. I was surprised.

 

Umm, I'd call that operator error...

 

I guess I could add a muffler or bring the exhaust all the way out the back, but currently running 3" with a 22" resonator and a turndown at the diff. 6th at 65 was not enjoyable, but with the 5 speed it was tolerable and could still have a conversation with the passenger.

 

Conversations are overrated

 

Almost 2 years since the last update on this...

Running E85 only
Swapped out Trackspeed COPs for IGN1As and Magnecor wires
275/50/15 rear tires
Swapped 6258 for 6758
Skunk2 manifold
DW300 pump

Finally hit the dyno yesterday, ran into some issues with the head gasket leaking at boost levels over 20ish psi. But managed to make 420hp 407tq @25psi and 12-14* peak timing.
I'm maxing out the ID1000s, which I didn't expect so I'm going to send them out to be tested but will probably add injectors to the next list of things to upgrade.
There is still some room to optimize the boost control for spool, and obviously the timing.

Dyno charted in MPH not RPM.

 

Holy bejeesus, that car must be a beast! How are the RS4's handling the power? I'm planning on switching to RC1's to help with traction, my VR1's in the same size as yours just aren't cutting it with much less power.

Edit: saw you are running 275's now. What tire and how are they holding up with that power? Post some pics if you get a chance. Would love to see what it looks like now.

 

I'm currently running the RS4's in the front, and Mickey Thompson ET Street S/S 275s in the rear. The RS4's as you'd expect presented some traction challenges even before I put the 6758 on there.

 

Please post a pic of the new tires on, would love to see it! How is the handling and driving with the ET street s/s tires in the rear? Considered using those, but was worried about it killing the handling.