The Bar is Raised - 10.7 at 133

[Jack B]

This is typically the last weekend in Northern Ohio for the dragstrips. The conditions were fair with a DA of aprox +1000, however, the track surface was 50 degrees and throughout the day there was a fine mist which did not help traction. The secret to a low ET with the G5 is to get a low 60 ft time along with traction past the 60 ft mark. I did not have a run with both,however, I did have a 10.70 at 133. The 60 was poor (1.8) and the 330 was ok at 4.6 sec.

A HC G5 is going to go into the low ten's before too long. If you look at my 10.7, with a 1.80, 60 ft time, if someone gets a 1.6, 60 ft time, that will give us a 10.2-10.4 ET.

The HC engine is a little unique in that the power comes on so strong at 5000 rpm, almost like a shot of nitrous. I hit the limiter multiple times in the top of first (at the strip) because the car would break loose past the 60. To reinforce how the power comes on, I dyno'ed last week and could not get a good pull. We did five pulls and in each one the tires started to loose grip from 4400 to 5400, then, break free again at 6100. I am going to dyno again in the spring, but, I am going to bring 200 lbs of weight to add to the trunk. Even though the dyno sessions were truncated, it did show 632 hp before starting to slip, for sure it will go 650-660 hp once we sort out the traction.

I expect the Texas boys to easily break the 10.7 this winter, I am shooting for a 10.3-10.4 this spring time. Good luck Flatout.

[GTSilver]

Great numbers congrats and i'm sure theres more in it with your driving skills.

Yousif

[Rapidrezults]

Nice runs Jack. I may have missed it but what was your highest MPH with the config before the HC install?

[Jack B]

That is hard to tell, it varies by track and the DA at the time. The HC mph is approx up 5 and this over a good hpt tune with headers. I had a high of 135 on the HC a couple of weeks ago, I posted that DA, i think it was a little under 2000. The problem with Ohio is the elevation is usually a 1000 ft plus and even when it is cold there is a high percentage of water in the air.

Nice runs Jack. I may have missed it but what was your highest MPH with the config before the HC install?

[mike@calvomotorsports]

Great runs man... we need to get a h/c car in the shop so we can bring it to the track and see how we can do in this hot humid texas heat

[Camfab]

Very nice, those Gen V's are certainly making power on the big end.

[ViperSmith]

Nice to see someone that spent the cash on H/C finally posting some numbers.

[Jack B]

Your cool air is coming

Great runs man... we need to get a h/c car in the shop so we can bring it to the track and see how we can do in this hot humid texas heat

[7TH_SIGN]

Great job man.

[mike@calvomotorsports]

Your cool air is coming

Yes but only way to get a track with any prep is a rental. They close for winter (nor yet of course though)..

[Jack B]

Nineball and Flatout seem to have some good access.

Yes but only way to get a track with any prep is a rental. They close for winter (nor yet of course though)..

[mike@calvomotorsports]

Nineball and Flatout seem to have some good access.

Heck not worried about getting a track thats the easy part.we have to get a Gen V in and do arrow h/c package on it first b4 we can play at the track with it lol. Any Gen Vs down lol???!!!!!!hahaha

[G37Sam]

Awesome time! What nitrous setup are you running?

[FLATOUT]

Nineball and Flatout seem to have some good access.

Great run Jack! I'm looking forward to getting out there again! Glad the car is running well

Heck not worried about getting a track thats the easy part.we have to get a Gen V in and do arrow h/c package on it first b4 we can play at the track with it lol. Any Gen Vs down lol???!!!!!!hahaha

You'll have to purchase the parts from ViperExchange if you want to do the install in your shop. I have a few packages in stock right now but have 5-6 cars in the Q for installs. Shoot me an email for over the counter parts totals awheeler@viperexchange.com and I'll set a kit aside for you guys if you need one.

Andy

[Jack B]

It is the HC, which is NA. The install was by Woodhouse

Awesome time! What nitrous setup are you running?

[swexlin]

Holy Sheeet Jack, that's some nice driving. Good job.

[99RT10]

Very well done Jack.

[J TNT]

Nice numbers Jack !
Couldn't help but wonder with the power coming on so strong on the top , if it would be any benefit to have the cam advanced a few degrees and shift the power curve toward the mid range ?

[PaulP]

Right on congrats Jack! Any videos of your runs ?

[Jack B]

I did not mean to scare anyone about the power, my comments were specific to a dragstrip with no prep, basically a cold/slippery surface and this was with ESC off. With the drag radials on the street you have all the traction you need. I will say this, with the Corsa's on the car, it will break loose from a roll in 1st gear with the ESC off.

I would not want them to change anything, the increased power is where you need it, on the dragstrip you the never sees anything lower than 5000 once you shift. I would think the same applies to a road course, you would typically be in a range of 4000 to 6000 rpm.

I just looked at my logs of the run with a 1.8 sec, 60 ft time (10.7 ET),. I am not proud of that by any means, however I looked at the 60 mph number associated with that run, it was a 3.11 sec to 60 mph. I just thought that was of interest, with traction that number should come way down.

Here is log of the pedal, throttle and rpm, you can see that the pcm takes some control away from the driver:

Green is the pedal
Blue is the throttle
Black is the rpm

The log shows the tires slip a couple of times. It is interesting to see the pedal versus the throttle.

1. The third vertical line (peak rpm) is where the tires gain traction and the engine starts to bog. All the while this is with the foot to the floor.

2. At the fourth vertical line, the engine recovers and the rpms start to climb.

3. At the fourth vertical line you can see the throttle follows the rpm down even though the pedal is to the floor.

4. Right after the second vertical line, the pedal is climbing, but, the throttle goes flat as the car gains traction.

Pedal-Throtle-RPM 1.8 60 ft.jpg

Nice numbers Jack !
Couldn't help but wonder with the power coming on so strong on the top , if it would be any benefit to have the cam advanced a few degrees and shift the power curve toward the mid range ?

[SilveRT8]

For anybody that went to the strip and came back frustrated, like me, cause the Gen5 is tricky to get a good launch....those are awsome numbers no matter what !
Congrats and keep at it Jack !

[J TNT]

Thanks for clarifying that Jack ! Your posts are always interesting and insightfull ! Look forward to your progress !

I did not mean to scare anyone about the power, my comments were specific to a dragstrip with no prep, basically a cold/slippery surface and this was with ESC off. With the drag radials on the street you have all the traction you need. I will say this, with the Corsa's on the car, it will break loose from a roll in 1st gear with the ESC off.

I would not want them to change anything, the increased power is where you need it, on the dragstrip you the never sees anything lower than 5000 once you shift. I would think the same applies to a road course, you would typically be in a range of 4000 to 6000 rpm.

I just looked at my logs of the run with a 1.8 sec, 60 ft time (10.7 ET),. I am not proud of that by any means, however I looked at the 60 mph number associated with that run, it was a 3.11 sec to 60 mph. I just thought that was of interest, with traction that number should come way down.

Here is log of the pedal, throttle and rpm, you can see that the pcm takes some control away from the driver:

Green is the pedal
Blue is the throttle
Black is the rpm

The log shows the tires slip a couple of times. It is interesting to see the pedal versus the throttle.

1. The third vertical line (peak rpm) is where the tires gain traction and the engine starts to bog. All the while this is with the foot to the floor.

2. At the fourth vertical line, the engine recovers and the rpms start to climb.

3. At the fourth vertical line you can see the throttle follows the rpm down even though the pedal is to the floor.

4. Right after the second vertical line, the pedal is climbing, but, the throttle goes flat as the car gains traction.

Pedal-Throtle-RPM 1.8 60 ft.jpg

[Jack B]

I will try to post the run tonight

Right on congrats Jack! Any videos of your runs ?

[ACR Xtreme]

Must say I'm a little disappointed in the trap speed for the H&C package. Was under the impression based on the dyno numbers that this package would trap low 140's. Stock and/or bolt on Gen Vs have already trapped low 130's: http://nineballgarage.com/2015/01/dr...ellcat-vs-zr1/

Doesn't seem like it's worth the $$$ to have this done on my ACR anymore.

[Jack B]

A lot of G5's have also trapped 125. The car did a best of 135 mph with a DA of +1800. This day, the trap speed was held back by excessive spinning in first gear past the 60 ft mark. It was cool, however, the air was so full of moisture that droplets were forming on the car. There is no way you are going to see 140 with a normal DA, yes with a -1500 to -2000 you might get 140, but, that is not normal for 99% of those who race.

You better do some research you are short on posts. The HC is basically 50 hp over a good tune with all the bolt-ons, that 50 hp is probably good for 5-7 mph, and that is right where the results are. This track I was at is sort of strange in that it always shows 2 MPH less then two other tracks I run at, my G2 was the same? You are probably right, it is not for everyone and you happen to be one of those.

Must say I'm a little disappointed in the trap speed for the H&C package. Was under the impression based on the dyno numbers that this package would trap low 140's. Stock and/or bolt on Gen Vs have already trapped low 130's: http://nineballgarage.com/2015/01/dr...ellcat-vs-zr1/

Doesn't seem like it's worth the $$$ to have this done on my ACR anymore.