Street Racing & Kill Stories - C5Z06 (370ci/Race Gas) vs G8GT (TT/E85) *vid*

Traction issues for both cars, watch the 2nd run closely and you can see how bad the C5Z is swaying back and forth.


http://www.youtube.com/watch?v=GptZUAEKXFE

Got traction much?

Still pretty sweet to see a family sedan with a combo with A LOT left in it run away from a C5Z. Not exactly the easiest feat.

Nice vid!

Someone edumacate me. Why would that setup on the z need race gas?

(In b4 someone says becuz racecar)

G8 is sick

Nice vid!

Someone edumacate me. Why would that setup on the z need race gas?

(In b4 someone says becuz racecar)

High Compression. 13.7

If this is the same TT G8 that the Procharged G8 raped it really puts it into perspective just how fast that white bitch is...

High Compression. 13.7

If this is the same TT G8 that the Procharged G8 raped it really puts it into perspective just how fast that white bitch is...

So does it's 130+ trap lol.

Nice runs, Z was swaying like crazy. I would have pissed my pants.

holy unnecessary compression batman!

holy unnecessary compression batman!

Lmao...Obviously cause it didnt do much for him.

Lmao...Obviously cause it didnt do much for him.

compression like that is useful when you have a fully built race motor reving high rpm. All that compression is doing in this car is ruining its streetabilty. Thats the kind of compression that needs octane even at idle or it will ping.

compression like that is useful when you have a fully built race motor reving high rpm. All that compression is doing in this car is ruining its streetabilty. Thats the kind of compression that needs octane even at idle or it will ping.

Compression makes up for displacement. Lets you run a much bigger cam without sacrificing as much mid range. Compression and RPM have nothing to do with each other. That sort of compression is just fine on E85. Ive seen that compression run on E85 quite often without any issues. Race gas is over kill IMO.

Lol compression/rpm revving

Not impressed with the high compression, big cam Z06... I would be rethinking that combo...

That 4200 lb G8 just brutalized it....

Shane's white G8 is definitely the monster outta that group.... THAT car is impressive to me...

nice videos as always. That C5Z just got walked. Bad.

That c5z would've done better with full bolt-ons.

High Compression. 13.7

If this is the same TT G8 that the Procharged G8 raped it really puts it into
perspective just how fast that white bitch is...

Same car, same night. I just whored my vids out to Shane so he could make his video (I was the bumb yelling 123 in his vid haha). At least I get a cut of youtube checks for that. :)

So does it's 130+ trap lol.

Nice runs, Z was swaying like crazy. I would have pissed my pants.

Shane trapped 134mph best.

Compression makes up for displacement. Lets you run a much bigger cam without sacrificing as much mid range. Compression and RPM have nothing to do with each other. That sort of compression is just fine on E85. Ive seen that compression run on E85 quite often without any issues. Race gas is over kill IMO.

I understand how that works... but once you start getting passed 11:1....you start sacrificing your ability to run on pump octane for minimal gain. That whole "jack up the compression to make up for the spongeyness of the cam that is way to big for this motor" theory doesnt work. Ive been there... ive done that on one of my numerous motors. I personally prefer 10.5-11.0 for an N/A motor. Compression is a bit over rated in the modern era. Back in the 60s... compression and cubic inch were king...

Its pretty clear that the setup in this z06 isnt very good. Like HIO said, a full bolt on z06 would have done better.

I understand how that works... but once you start getting passed 11:1....you start sacrificing your ability to run on pump octane for minimal gain. That whole "jack up the compression to make up for the spongeyness of the cam that is way to big for this motor" theory doesnt work. Ive been there... ive done that on one of my numerous motors. I personally prefer 10.5-11.0 for an N/A motor. Compression is a bit over rated in the modern era. Back in the 60s... compression and cubic inch were king...

Its pretty clear that the setup in this z06 isnt very good. Like HIO said, a full bolt on z06 would have done better.

Ive seen different, several times. Ill just skip the argument and agree to disagree. As for pump gas, that's just a choice. Like ive said plenty of times around me E85 is everywhere making it not a problem to run or "hassle". The z06 has stock head cast, and stock LS3 IM. It runs like it should IMO. IMO its running like it should.





what does this G8 trap anyways?

supposedly this is a mid 120s trap G8. It shouldnt take much for a z06 to get to that. Even if this car has stock head and stock intake, it should be plenty

Agreed. Piss-poor performance out of that C5Z.

supposedly this is a mid 120s trap G8. It shouldnt take much for a z06 to get to that. Even if this car has stock head and stock intake, it should be plenty

In that case, i agree completely. Goes to show you how usless dyno #'s are. This car dyno'd 5xxwhp i believe

I personally prefer 10.5-11.0 for an N/A motor. Compression is a bit over rated in the modern era. Back in the 60s... compression and cubic inch were king...


I run 10.5:1 pistons in my Evo. I'm a fan of compression, as long as the fuel is up to the task.

i run 10.5:1 pistons in my evo. I'm a fan of compression, as long as the fuel is up to the task.

this.

Looks like you guys are having fun! Its amazing how slow a 130+ trap feels in a G8. Its just so stable and smooth.

Sounds like the stock heads and IM are killing the Z's top end. I know even on a mild 364 the OEM IM killed top end by 30+whp, so I cant imagine with more underneath it... just a choke point.

Looks like you guys are having fun! Its amazing how slow a 130+ trap feels in a G8. Its just so stable and smooth.

Sounds like the stock heads and IM are killing the Z's top end. I know even on a mild 364 the OEM IM killed top end by 30+whp, so I cant imagine with more underneath it... just a choke point.
Actually the stock LS3 heads flow 320-340cfm and the stock LS3 intake flows as good (or better) then a FAST. Port the LS3 intake and a FAST can't touch it. That setup in that vette sounds like a setup that should run great, but I'm betting someone screwed up the timing (either too much or too little).

For the record: I am 11.3 to 1 CR and have NEVER had a ping running on the higher end of recommended timing at a total of 28 degrees. I've got acquaintances with big cube 13+ to 1 CR lsx engines running E85 and meth. that 2 point higher in compression pays off in spades on the dyno...

I understand how that works... but once you start getting passed 11:1....you start sacrificing your ability to run on pump octane for minimal gain. That whole "jack up the compression to make up for the spongeyness of the cam that is way to big for this motor" theory doesnt work. Ive been there... ive done that on one of my numerous motors. I personally prefer 10.5-11.0 for an N/A motor. Compression is a bit over rated in the modern era. Back in the 60s... compression and cubic inch were king...

Its pretty clear that the setup in this z06 isnt very good. Like HIO said, a full bolt on z06 would have done better.

I'm definitely not a fan of high compression small block motors. If it was a 540ci+ with a shot maybe, but just like you said these days it's all boost and numbers prove it!!

I'm definitely not a fan of high compression small block motors. If it was a 540ci+ with a shot maybe, but just like you said these days it's all boost and numbers prove it!!

my strongest motors always had the least compression. Not saying compression hurt the numbers of the other motors... but it just mattered that little. Nowadays its all efficient combustion chambers and cfm.

Yea i tune the c5z it just needs a new intake and ported heads to really perform the way it needs to. it did made 485 on a mustang dyno but the numbers drop pretty hard after 6500 rpms and he shifts at 7,000 plus :/

Actually the stock LS3 heads flow 320-340cfm and the stock LS3 intake flows as good (or better) then a FAST. Port the LS3 intake and a FAST can't touch it. That setup in that vette sounds like a setup that should run great, but I'm betting someone screwed up the timing (either too much or too little).

For the record: I am 11.3 to 1 CR and have NEVER had a ping running on the higher end of recommended timing at a total of 28 degrees. I've got acquaintances with big cube 13+ to 1 CR lsx engines running E85 and meth. that 2 point higher in compression pays off in spades on the dyno...

Thats pretty funny considering my box stock FAST 102 outperformed my ported LS3 intake by a good bit. I gained 17-20whp throughout the powerband and 30+ from 6-7k RPM where the OEM piece fell off drastically. I know how much the stock heads flow and my ported/milled/valve job ones flowed a good bit more then stock.

Yeah I have a 454 LS engine, LS7 heads, with a single plane now... it is a lot of fun.

I'm definitely not a fan of high compression small block motors. If it was a 540ci+ with a shot maybe, but just like you said these days it's all boost and numbers prove it!!

Well obviously a turbo car isn't going to last long with the same setup compression as a nitrous/all motor setup. Me personally, Idc as much about turbo cars. I like all motor and nitrous cars, which is where compression actually matters. Anything with a turbo kit slapped on will always be considerably faster. Reason why i got a domestic is because you don't need a turbo kit to make over 500whp. In the import world its needed lol.