Mph question....?

[two-gun kid]

Friend of mine has a
03 cobra
2.6 kb @ 17lbs
567hp/480tq
Stock headers
Magnaflow x pipe with hi flow cats
Magnaflow mufflers
Solid rear with 4.10
Pprv delete
Stock pump with bap
60lb injectors

His 60ft average 1.7/1.8
1/8 mile his best is
7.67 @93.60

His best 1/4 is
Et 12.13
Mph 111.73

Car runs fine I'm thinking its his tune but would like to see what you guys think.

 

[ian04]

1

 

[racebronco2]

Friend of mine has a
03 cobra
2.6 kb @ 17lbs
567hp/480tq
Stock headers
Magnaflow x pipe with hi flow cats
Magnaflow mufflers
Solid rear with 4.10
Pprv delete
Stock pump with bap
60lb injectors

His 60ft average 1.7/1.8
1/8 mile his best is
7.67 @93.60

His best 1/4 is
Et 12.13
Mph 111.73

Car runs fine I'm thinking its his tune but would like to see what you guys think.

His et and mph is low. My car at 522/480 did 11.80 at 121mph. My best 60ft was 1.84, my 1/8 was really close to your but the mph was at about 98mph.

I'm thinking the 4.10's of a lack of traction are really hurting him on the launch and getting wheel spin in 1st and 2nd.

A friend's 460hp cobra with 4.10's has a best of 11.55 at about 121mph with a 1.58 60'.

 

[two-gun kid]

His et and mph is low. My car at 522/480 did 11.80 at 121mph. My best 60ft was 1.84, my 1/8 was really close to your but the mph was at about 98mph.

I'm thinking the 4.10's of a lack of traction are really hurting him on the launch and getting wheel spin in 1st and 2nd.

A friend's 460hp cobra with 4.10's has a best of 11.55 at about 121mph with a 1.58 60'.

It's running a MT et drag so wheel spin isn't a issue nor is the driver
Several people made passes in the car and trap would be around 103-108mph

 

[supman]

I'm in an '03 Cobra with the same MT streets
Dyno'd at 421hp/450tq.
Best 1/4mile time so far is a 12.38 at 113.23mph with a 1.869 sixty and
8.025 at 88.25mph in the 1/8th.

thats at sea level.

I'm running: ported eaton 12lbs boost, 60lb inj., BAP, afco cooler, ice in ic res.

 

[Swervedriver]

Clutch slipping?

My car went from 130, to 131, to 113 in three passes when my exedy twin got tired.

Other possibilities are clogged cats, failed IC pump.

If the car is making 560rwhp it should trap >120. I would expect at least 126 and that's with a really heavy car in not the best air and no ice. I wouldn't put this issue on the tune.

 

[two-gun kid]

Clutch slipping?

My car went from 130, to 131, to 113 in three passes when my exedy twin got tired.

Other possibilities are clogged cats, failed IC pump.

If the car is making 560rwhp it should trap >120. I would expect at least 126 and that's with a really heavy car in not the best air and no ice. I wouldn't put this issue on the tune.

Clutch was replaced not long ago. When he had the ported/pullied steggy be trapped a best of 117mph. Now with the kb he can barely hit 112mph.
Passes were done at Sacramento raceway which is just above sea level on a cool afternoon.