Street Racing & Kill Stories Basic Technical Questions & Advice

TVS 5.0 vs KB Cobra

Old 08-10-2014, 03:28 PM
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Arrow TVS 5.0 vs KB Cobra

A friend's brother just picked up the 5.0, so we wanted to see how it matches up with a local Terminator. ONly got 2 runs in, first one the 5.0 didn't leave right away since he doesn't street race much, 2nd was a clean start but he didn't want to run it up very high in the MPH.

5.0- 2.3L TVS, 10psi, flowmaster mufflers, pump gas, Drag Radials
Cobra- built motor, 2.6L Kenne Bell, E85, 21 psi, Drag Radials


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Old 08-10-2014, 03:40 PM
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Wonder what the outcome would have been if the 5.0 had a more experienced driver?
Old 08-10-2014, 03:45 PM
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Good runs. 5.0 driver needs a little more seat time. Was the belt slipping on the termi?
Old 08-10-2014, 04:41 PM
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Them KB always seem too under perform that thing being on E85 with a built motor should look like the first race everytime

TVS ftw !
Old 08-10-2014, 06:19 PM
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Originally Posted by Lawhead
Them KB always seem too under perform that thing being on E85 with a built motor should look like the first race everytime

TVS ftw !
I agree, that's why I bought a tvs..
Old 08-14-2014, 11:31 PM
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Might want to look up the engineering and physics behind roots and twin screw blowers before making that claim.

Always silly to judge based upon one car. If the specs and mods are true that cobra should be sporting ~700RWHP easy. A car with belt slippage issues or driver issues doesn't give definition to all of the mods he has on his car. If the mods are true on this video then there are belt slippage or driver issues. The cobra has a superior blower with allegedly twice the boost. Even if KBs were garbage this race is still over based upon the boost. Keep in mind the 03 Cobra is giving up displacement, cylinder heads and RPM on this race.

A TVS 2.3L doesnt hold a candle to a 2.6L Gen II or III KB when it comes to HP/TQ pound for pound. Tons of dyno results out there to show this. Would be a much more fair comparison with a 2.1L or 2.4L Gen II KB.

Last edited by Iliac; 08-14-2014 at 11:54 PM.
Old 08-15-2014, 07:36 AM
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Originally Posted by Iliac
Might want to look up the engineering and physics behind roots and twin screw blowers before making that claim.

Always silly to judge based upon one car. If the specs and mods are true that cobra should be sporting ~700RWHP easy. A car with belt slippage issues or driver issues doesn't give definition to all of the mods he has on his car. If the mods are true on this video then there are belt slippage or driver issues. The cobra has a superior blower with allegedly twice the boost. Even if KBs were garbage this race is still over based upon the boost. Keep in mind the 03 Cobra is giving up displacement, cylinder heads and RPM on this race.

A TVS 2.3L doesnt hold a candle to a 2.6L Gen II or III KB when it comes to HP/TQ pound for pound. Tons of dyno results out there to show this. Would be a much more fair comparison with a 2.1L or 2.4L Gen II KB.
The TVS and 2.8 are more of a comparison than the TVS and 2.1 or 2.4 it's not even close
Old 08-15-2014, 07:41 AM
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I saw Tims car at SCT Kansas. It runs good but not as good as the mods would suggest

But that aside it is beautiful lol
Old 08-15-2014, 02:54 PM
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Originally Posted by Iliac
Might want to look up the engineering and physics behind roots and twin screw blowers before making that claim.

Always silly to judge based upon one car. If the specs and mods are true that cobra should be sporting ~700RWHP easy. A car with belt slippage issues or driver issues doesn't give definition to all of the mods he has on his car. If the mods are true on this video then there are belt slippage or driver issues. The cobra has a superior blower with allegedly twice the boost. Even if KBs were garbage this race is still over based upon the boost. Keep in mind the 03 Cobra is giving up displacement, cylinder heads and RPM on this race.

A TVS 2.3L doesnt hold a candle to a 2.6L Gen II or III KB when it comes to HP/TQ pound for pound. Tons of dyno results out there to show this. Would be a much more fair comparison with a 2.1L or 2.4L Gen II KB.
copied and pasted just for you...even tho it's not a kb the whipple gives you an idea..

Just got off the dyno

I have had all my dyno runs at the same dyno so here's your real world comparisons

Street tune 93 + 18* timing

2.9 standard inlet 3.5" pulley 18psi 666/572
2.3 whipple 2.75" 20psi 611/552
2.3 TVS 2.8" 18.5 psi 656/590

Race tune 104 or 109 + 19* timing

2.9 standard 682/601 3.2" pulley 21psi
2.9 crusher 710/620 3" pulley 21psi
2.3 TVS 681/642 2.6" pulley 21 psi
2.3 whipple 644/621 2.6" 24psi



Pretty apparent the TVS is a huge player now in the blower wars....thing is
Amazing.
Old 08-15-2014, 11:12 PM
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Originally Posted by red beast
copied and pasted just for you...even tho it's not a kb the whipple gives you an idea..

Just got off the dyno

I have had all my dyno runs at the same dyno so here's your real world comparisons

Street tune 93 + 18* timing

2.9 standard inlet 3.5" pulley 18psi 666/572
2.3 whipple 2.75" 20psi 611/552
2.3 TVS 2.8" 18.5 psi 656/590

Race tune 104 or 109 + 19* timing

2.9 standard 682/601 3.2" pulley 21psi
2.9 crusher 710/620 3" pulley 21psi
2.3 TVS 681/642 2.6" pulley 21 psi
2.3 whipple 644/621 2.6" 24psi



Pretty apparent the TVS is a huge player now in the blower wars....thing is
Amazing.
I'll start by humoring this.

Were these runs done on the same vehicle, with the same exact mods in very similar DA and air temperatures? Anybody can just post **** like this. Where is the proof that this comparison was done properly? Same Vehicle, same mods, same DA same air temp. Otherwise its hogwash pulled out of the sky.

Gen II and III LC KBs are way different than whipples. Whipples are better than TVSs as well.

There is absolutely no opinion on this matter. Roots superchargers do not hold a candle to Twin-Screw blowers. Its not opinion. Lets start with the fact that roots blowers cant even sustain full boost throughout an entire RPM range. The typical isentropic efficiency of a roots blower is anywhere from 20% to 40% lower. The higher the boost the worse the roots blower gets. Wanna know what else gets worse? Heat. Roots cannot hang.

I'm assuming since these basic principles are not understood that I shouldnt get into much more detail on the topic for now.

Lets also keep in mind how often Cobra/GT500 owners switch to twin screw blowers and have since 03. Its called an upgrade. Theres a reason whipple and KB can charge the money they charge. If the alternatives were better I dont think they would be in business.
Old 08-16-2014, 06:52 AM
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Originally Posted by Iliac
I'll start by humoring this.

Were these runs done on the same vehicle, with the same exact mods in very similar DA and air temperatures? Anybody can just post **** like this. Where is the proof that this comparison was done properly? Same Vehicle, same mods, same DA same air temp. Otherwise its hogwash pulled out of the sky.

Gen II and III LC KBs are way different than whipples. Whipples are better than TVSs as well.

There is absolutely no opinion on this matter. Roots superchargers do not hold a candle to Twin-Screw blowers. Its not opinion. Lets start with the fact that roots blowers cant even sustain full boost throughout an entire RPM range. The typical isentropic efficiency of a roots blower is anywhere from 20% to 40% lower. The higher the boost the worse the roots blower gets. Wanna know what else gets worse? Heat. Roots cannot hang.

I'm assuming since these basic principles are not understood that I shouldnt get into much more detail on the topic for now.

Lets also keep in mind how often Cobra/GT500 owners switch to twin screw blowers and have since 03. Its called an upgrade. Theres a reason whipple and KB can charge the money they charge. If the alternatives were better I dont think they would be in business.

Your ignorance is funny to read lol
Old 08-16-2014, 08:07 AM
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Originally Posted by Iliac
I'll start by humoring this.

Were these runs done on the same vehicle, with the same exact mods in very similar DA and air temperatures? Anybody can just post **** like this. Where is the proof that this comparison was done properly? Same Vehicle, same mods, same DA same air temp. Otherwise its hogwash pulled out of the sky.

Gen II and III LC KBs are way different than whipples. Whipples are better than TVSs as well.

There is absolutely no opinion on this matter. Roots superchargers do not hold a candle to Twin-Screw blowers. Its not opinion. Lets start with the fact that roots blowers cant even sustain full boost throughout an entire RPM range. The typical isentropic efficiency of a roots blower is anywhere from 20% to 40% lower. The higher the boost the worse the roots blower gets. Wanna know what else gets worse? Heat. Roots cannot hang.

I'm assuming since these basic principles are not understood that I shouldnt get into much more detail on the topic for now.

Lets also keep in mind how often Cobra/GT500 owners switch to twin screw blowers and have since 03. Its called an upgrade. Theres a reason whipple and KB can charge the money they charge. If the alternatives were better I dont think they would be in business.
same car, same owner, same dyno I don't know about the da or air temps also you need to brush up on the tvs your info you keep quoting is info off the factory cobra m112 eaton the tvs doesn't drop boost or heat the air up that's why it was a redesign by eaton. but carry on you love twin screws that's cool they are very nice...
Old 08-16-2014, 08:26 AM
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Originally Posted by Iliac
Might want to look up the engineering and physics behind roots and twin screw blowers before making that claim.

Always silly to judge based upon one car. If the specs and mods are true that cobra should be sporting ~700RWHP easy. A car with belt slippage issues or driver issues doesn't give definition to all of the mods he has on his car. If the mods are true on this video then there are belt slippage or driver issues. The cobra has a superior blower with allegedly twice the boost. Even if KBs were garbage this race is still over based upon the boost. Keep in mind the 03 Cobra is giving up displacement, cylinder heads and RPM on this race.

A TVS 2.3L doesnt hold a candle to a 2.6L Gen II or III KB when it comes to HP/TQ pound for pound. Tons of dyno results out there to show this. Would be a much more fair comparison with a 2.1L or 2.4L Gen II KB.
You couldn't be more wrong.
Old 08-16-2014, 08:34 AM
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Cobra was out. And TVS VMP V2. Look it up!
Old 08-16-2014, 08:52 AM
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Originally Posted by evangto87
Cobra was out. And TVS VMP V2. Look it up!
Evan, how do you like boost? Completely different car isn't it?
Old 08-16-2014, 08:56 AM
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considering it only gained 75lbs, and is still on 3.73s, its pretty mental to say the least lol.
Old 08-16-2014, 11:17 AM
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Fun stuff. It'll bust 10's now
Old 08-16-2014, 12:48 PM
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Finally realize N/A isn't really that fun when you have boost ??
Old 08-16-2014, 03:26 PM
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yea its not so bad. Still getting used to it. Def makes you more nervous to beat on it with that kind of power
Old 08-16-2014, 05:04 PM
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Originally Posted by evangto87
yea its not so bad. Still getting used to it. Def makes you more nervous to beat on it with that kind of power
Details on new setup? Love blown cars.

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