Can a head/cams 2valve outrun a bolt on 4valve
- Thread starter MustangLife
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Tylerb59
Banned
Slightly retarded question and scenario but ... the 4v revs higher and breathes better so he would be able to run the gear out a little bit longer while the 2v is shifting.
2v < 4v
2v < 4v
Well the 2v would weigh a little bit less and the 4.10 gears are a better gear for the 2v. The 4v would need 4.30s or maybe higher to get the same type of performance. They will both produce power higher in the RPM band and the torque on the 2v will change from the cams.
Not sure, that is a good one.
Not sure, that is a good one.
stangman
15 Year Member
my guess would have to be with the 2v, but only cause the weight issue. still that's only a guess 
NicksBullitt
New Member
Otherwise=cars...........Higher redline in the 4v = more time in gear and on the gas for whatever length of a run.
By split decision.......4v.
By split decision.......4v.
NicksBullitt
New Member
mogs01gt said:
Don't know many stock 2v bottom ends which will hold up to many 6800 rpm shifts bud.
VTEngine
Founding Member
MustangLife said:
The red car?
Food for thought. IF 2 cars have the same body style, same race weight, same gearing, same power, and same driver........... math is math. Both cars should run the same regardless of motor. The ONLY factor would be area under the curve, but this is a hypothectical question, so the cars would be equal.
The better reaction time will win.....
Not quite.....both cars make their power in different areas. The 2V tends to make a little more grunt down low, where the 4V likes to rev it out up-high. Even if the 2V had a better reaction time, it's entirely possible that the 4V could run him down at the top of each gear.VTEngine said:The red car?
Food for thought. IF 2 cars have the same body style, same race weight, same gearing, same power, and same driver........... math is math. Both cars should run the same regardless of motor. The ONLY factor would be area under the curve, but this is a hypothectical question, so the cars would be equal.
The better reaction time will win.....
Stock for stock, the 4V's heads still breath considerably better....but you ain't gonna make 320hp on a 2V without doing some serious work to the heads anyway. Tough call either way.
NicksBullitt
New Member
Correct me if I'm wrong, but both cars shift the exact same number of gears, with the same trannys.
So, the 2V even, with a bumped up rev limiter to 6.5k would shift to 4th probably about 2 sec sooner than the 4v. I don't know about you guys but my car pulls a heck of a lot harder in 3rd than in 4th.
So, the 4v would spend less total time in 4th gear(1:1) and more time in 1-3 due to the higher revs, which should allow him to use the increased distance in the lower ratio gears to give him better acceleration.
So, the 2V even, with a bumped up rev limiter to 6.5k would shift to 4th probably about 2 sec sooner than the 4v. I don't know about you guys but my car pulls a heck of a lot harder in 3rd than in 4th.
So, the 4v would spend less total time in 4th gear(1:1) and more time in 1-3 due to the higher revs, which should allow him to use the increased distance in the lower ratio gears to give him better acceleration.
TR03Mach1
Member
Not sure if you are just being stupid but to make 320rwhp in a 2v, you will need cams and head work.Gearbanger 101 said:Not quite.....both cars make their power in different areas. The 2V tends to make a little more grunt down low, where the 4V likes to rev it out up-high. Even if the 2V had a better reaction time, it's entirely possible that the 4V could run him down at the top of each gear.
Stock for stock, the 4V's heads still breath considerably better....but you ain't gonna make 320hp on a 2V without doing some serious work to the heads anyway. Tough call either way.
The dyno of the 2v will have the power band looking totally different than a stock headed 2v. The would be all power in the upper RPMs and depending on what cams, the torque would peak in the midrange a lot later.
and serious work would equal a stage II head correct? no, that isnt serious work.
Again…. another case of Mogs putting his foot into his mouth!mogs01gt said:
Can’t believe you’re still holding a grudge over my besting you in other threads? When are you ever gonna learn that being a dick gets you know where. Do you actually just go around looking for threads that I reply to and then troll around to try to bust my chops….cause if that’s the case, I can make you look silly in front of the rest of the board as many times as you’d like. It’s no skin of my nose and it’s not my rep being tarnished for calling people names and acting like a jerk? 
If you care to read it again, I dismissed my previous statement about the two of them making different powerbands after I touched on the fact that a 320hp 2V wouldn’t fall under stock characteristics anyway. I dunno about you, but I’d consider ported heads and a cam swap a start to some pretty serious mods, wouldn’t you?So, basically….you call me stupid and then you agree with me? You really need to just let things go and think before you speak some times and lose that chip on your shoulder.
nickthegenius
Active Member
MustangLife said:
If the 4v is in a Cobra, loan him some slicks so it breaks a half-shaft off the line. Cammed 2v wins.
I hate downtime at the track for broken Cobras
In all reality, it would be a driver's race especially since the 4v wouldn't have the optimum gearing.
