I have a Gen2 TVS on my '04, and it's a disappointment. Mostly I think it's because my tuner was ridiculously overly conservative. (BBK DBTB, 60# injectors, VMP BAP and MAF, LFP dual-pass HE, 70/30 water/coolant with water wetter)
I was running a 2.8 pulley, which made 19 PSI. The tuner gave me three tunes--93 octane (with what appears to be a peak of 13.5 degrees of timing based on my OBDII scanner), octane-booster-supplemented 93 octane (appeared to be 15.5 degrees), and race gas (appears to be 18.5 degrees). Additionally, the tune pulls timing based on IAT2 very aggressively--I might get full timing for most of one 2nd-4th gear run, but definitely not on any subsequent runs.
The 13.5 degree tune was pathetic. If it was over 500RWHP, it wasn't by much. The 15.5 degree tune was a little better, but probably no more than 530-540RWHP. I started running the 15.5 degree tune on straight 93 and it didn't blow up, but IAT2s were still in the 140-145F range after one pull, so it was pulling timing. (This is in 90+ degree ambient temps, so not exactly optimal.)
In the interest of getting the IAT2s down, I went to a 3.0 pulley which makes 16.5PSI, and started running the 18.5 degree "race gas" tune on 93 + octane booster. This is by far the punchiest configuration--I'd guess 550-560RWHP before it starts pulling timing noticeably--but still disappointing.
I am tempted to go back to the 2.8 pulley and run the race gas tune on 93 + octane booster. I am getting a divorce and may lose the Cobra, so while I'm not purposely trying to blow it up, if I do end up hurting it, it'll likely be her problem, not mine. What do you guys think?
On a related note, if you see a silver '04 Cobra with 35Kish miles in southern Illinois up for sale in the next year or so, it has the following issues, so don't give her top dollar for it:
--head tick (mild but noticeable when it gets hot)
--squeaky throwout bearing
--rear glass tint is starting to peel away
--R888s are shot--great for driving sideways, worthless for putting the power down in first or second (but I still want more now because.. REASONS)
--needs to be retuned (in addition to being painfully conservative and disappointingly slow, it has an off-idle hesitation that necessitates excess clutch slip or it'll try to stall, and it lurches at light throttle / low RPM driving, like stop-and-go)
(This car was tough when it was just a 2.76 Eaton and had great drivability--since then, I've spent north of $5K on a car that's marginally quicker and has drivability issues. I should have just had the Eaton ported and been done with it.)
I was running a 2.8 pulley, which made 19 PSI. The tuner gave me three tunes--93 octane (with what appears to be a peak of 13.5 degrees of timing based on my OBDII scanner), octane-booster-supplemented 93 octane (appeared to be 15.5 degrees), and race gas (appears to be 18.5 degrees). Additionally, the tune pulls timing based on IAT2 very aggressively--I might get full timing for most of one 2nd-4th gear run, but definitely not on any subsequent runs.
The 13.5 degree tune was pathetic. If it was over 500RWHP, it wasn't by much. The 15.5 degree tune was a little better, but probably no more than 530-540RWHP. I started running the 15.5 degree tune on straight 93 and it didn't blow up, but IAT2s were still in the 140-145F range after one pull, so it was pulling timing. (This is in 90+ degree ambient temps, so not exactly optimal.)
In the interest of getting the IAT2s down, I went to a 3.0 pulley which makes 16.5PSI, and started running the 18.5 degree "race gas" tune on 93 + octane booster. This is by far the punchiest configuration--I'd guess 550-560RWHP before it starts pulling timing noticeably--but still disappointing.
I am tempted to go back to the 2.8 pulley and run the race gas tune on 93 + octane booster. I am getting a divorce and may lose the Cobra, so while I'm not purposely trying to blow it up, if I do end up hurting it, it'll likely be her problem, not mine. What do you guys think?
On a related note, if you see a silver '04 Cobra with 35Kish miles in southern Illinois up for sale in the next year or so, it has the following issues, so don't give her top dollar for it:
--head tick (mild but noticeable when it gets hot)
--squeaky throwout bearing
--rear glass tint is starting to peel away
--R888s are shot--great for driving sideways, worthless for putting the power down in first or second (but I still want more now because.. REASONS)
--needs to be retuned (in addition to being painfully conservative and disappointingly slow, it has an off-idle hesitation that necessitates excess clutch slip or it'll try to stall, and it lurches at light throttle / low RPM driving, like stop-and-go)
(This car was tough when it was just a 2.76 Eaton and had great drivability--since then, I've spent north of $5K on a car that's marginally quicker and has drivability issues. I should have just had the Eaton ported and been done with it.)