[00GT5spd]

Originally Posted by 4.10GT its just i race my bros srt-4 sometimes on the interstate in my old mustang and i would hit about 110 and then go into OD but i cant have this with this gt i wanted more MPH before i hit OD

well with the accl. of the 4.10s ur not gonna have to worry about it ull be ahead before he catch's you but if you race the whole interstate he might run u down.. are cars are build for from a dig racing.. not 4 mile racing lol just throwing it out there :p

[4.10GT]

lol dont think itll be like that my bros srt-4 is retarded fast with the stock turbo. only way i beat him with my old gt was from a dig lol. and i know they are but im gonna take a different route with this and make it top end too.

[BLOWN2V]

4.10s over 3.73 for sure

as said above 4.10s with give a higher top speed and if your only worried about highway top speed blasts then still go with 4.10 cause 5th gear will be useable unlike with the 3.27s and better then the 3.73s

as for the 1/4. I was trapping 109 n/a with 4.10s and a 26in tire. With the blower I was trapping 123@6600 with the 4.10s and 26in tire and now trap near 129@6600 with 28in tires and 4.10s. Oh and the motor n heads are stock right down to the valve springs only cams have been added

[Willy Mo]

even on the hwy tho racing is only good till top of 4th. if i shift into 5th its still a dog at 110mph.

[cliffyk]

Originally Posted by BLOWN2V 4.10s over 3.73 for sure as said above 4.10s with give a higher top speed and if your only worried about highway top speed blasts then still go with 4.10 cause 5th gear will be useable unlike with the 3.27s and better then the 3.73s as for the 1/4. I was trapping 109 n/a with 4.10s and a 26in tire. With the blower I was trapping 123@6600 with the 4.10s and 26in tire and now trap near 129@6600 with 28in tires and 4.10s. Oh and the motor n heads are stock right down to the valve springs only cams have been added

This is correct. With 4.10s engine RPM at top speed (145 to 160) will be higher and closer to your engine's peak output point.

It takes 188 rwHP or so to sustain a new-edge GT coupe to 145 MPH (see my "How much HP to go how fast?" calculator).

With 3.27s, in 5th gear, the engine will be spinning 4k RPM or so (see my "How fast can I go in each gear?" calculator), probably 1.0k to 1.2k RPM below its peak output, and probably at just about 188HP output for a stock GT in reasonable tune and condition.

It takes 227 rwHP to sustain 155 MPH, with 3.73s the engine will be running at 4.85k RPM, much closer to the HP peak and much more like to be able to actually deliver 227 HP.

Sustaining 160 MPH requires 248 rwHP, and with 4.10s the engine would be spinning at 5.5k, probably a bit past peak HP but still "up there".

This is why, in our cars that have HP not "gear" limited top speeds, lower (numerically higher) rear-axle gears will actually increase top-speed. Selecting gears so as to match peak HP delivery and trap speed is a whole other issue.

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BTW, with a stock 3650 tranny, and 4.10s, and assuming you had the HP to do it, top-speed at 6500 RPM would be 190 MPH...