Ricky Bobby
Thread Starter
Melting Slicks
Joined: Jul 2007
Posts: 2,581
Likes: 15
From: Ohio
The only pro event track I have been to was at the LSX shootout and they wouldn't let me go wide open.
The problem is, even on my fast runs, I am not turned all the way up and I am still trying to push through FULL exhaust and 18x10's up front! I also had the first run of the M&H's that only had an 11" contact patch vs. the new ones that have a 12"+ contact patch.
Next time out I think pushing skinnies, removing mufflers, and the new tires should make a difference, along with taking out just a bit of weight.
I would imagine these changes on a well prepped track would make for 8.50's @ 160+ without even hittin the N20 (never used it yet). Imagine if I actually get enough traction to spray it
Drifting
Joined: Dec 2006
Posts: 1,769
Likes: 244
From: Morgan City Louisiana
Thread Starter
Melting Slicks
Joined: Jul 2007
Posts: 2,581
Likes: 15
From: Ohio
I just have to ask a couple of questions....
1) How many passes post build did it take you guys to get to 8.81?
2) How did you correct the stagging issues that were causing the lights to trip?
3) How much N20 was used on the Launch to push through the convertor?
4) Who was driving for the 8.81 pass and how long has that person been racing?
5) Are you guys planning on coming to the NMCA event or to a Private Corvette shootout if we get one together?
Thanks in advance.
Racer
Joined: Oct 2007
Posts: 392
Likes: 0
From: Smyrna Delawere
I just have to ask a couple of questions....
1) How many passes post build did it take you guys to get to 8.81?
2) How did you correct the stagging issues that were causing the lights to trip?
3) How much N20 was used on the Launch to push through the convertor?
4) Who was driving for the 8.81 pass and how long has that person been racing?
5) Are you guys planning on coming to the NMCA event or to a Private Corvette shootout if we get one together?
Thanks in advance.
1) How many passes post build did it take you guys to get to 8.81?
2) How did you correct the stagging issues that were causing the lights to trip?
3) How much N20 was used on the Launch to push through the convertor?
4) Who was driving for the 8.81 pass and how long has that person been racing?
5) Are you guys planning on coming to the NMCA event or to a Private Corvette shootout if we get one together?
Thanks in advance.
Last edited by RICKEY BOBBY; Mar 13, 2009 at 11:21 PM.
Le Mans Master
Joined: Jul 2005
Posts: 7,405
Likes: 353
From: New Castle Del.
St. Jude Donor '09
I just have to ask a couple of questions....
1) How many passes post build did it take you guys to get to 8.81?
2) How did you correct the stagging issues that were causing the lights to trip?
3) How much N20 was used on the Launch to push through the convertor?
4) Who was driving for the 8.81 pass and how long has that person been racing?
5) Are you guys planning on coming to the NMCA event or to a Private Corvette shootout if we get one together?
Thanks in advance.
1) How many passes post build did it take you guys to get to 8.81?
2) How did you correct the stagging issues that were causing the lights to trip?
3) How much N20 was used on the Launch to push through the convertor?
4) Who was driving for the 8.81 pass and how long has that person been racing?
5) Are you guys planning on coming to the NMCA event or to a Private Corvette shootout if we get one together?
Thanks in advance.
We will go to a private rental if you guys have one but only if the track lets us run.
Yes like isaac said it didnt take us many passes at all.
The staging problem we just figured out that he had to pull up further than it lit the prestage bulb again.
Isaac hasnt been racing that long at all. He drove the car well but by is no means a pro driver.
Thread Starter
Melting Slicks
Joined: Jul 2007
Posts: 2,581
Likes: 15
From: Ohio
Thanks for the replies, just trying to figure out what I may be doing wrong. 1.32 is really good for a novice driver. Was actually hoping he had been driving for a while so I would feel so bad about only hitting 1.42.
Reguardless Great runs and I can't wait to run side by side with you guys.
Reguardless Great runs and I can't wait to run side by side with you guys.
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Thread Starter
Melting Slicks
Joined: Jul 2007
Posts: 2,581
Likes: 15
From: Ohio
And yes my name is Mark.. I think I met you at the LSX Shootout if I remember correctly.
Safety Car
Joined: Apr 2004
Posts: 4,097
Likes: 10
From: East Coast
Well, I don't really want to add a cage, but what it comes down to is I like to race!
I'm tired of 1 and done or waiting for track rentals that are 4+ hours away. We got the rule book out and I think we can get the car to pass tech down to 8.50. For full boost we will still be illegal, but at least on waste gates I'll be able to compete.
Currently on waste gates my car runs 9.8x@140 if I baby it out on full sized tires and don't lock up. I have to hit the breaks to stay slower than 10.0.
I'm tired of 1 and done or waiting for track rentals that are 4+ hours away. We got the rule book out and I think we can get the car to pass tech down to 8.50. For full boost we will still be illegal, but at least on waste gates I'll be able to compete.
Currently on waste gates my car runs 9.8x@140 if I baby it out on full sized tires and don't lock up. I have to hit the breaks to stay slower than 10.0.
Former Vendor
Joined: Mar 2008
Posts: 2,279
Likes: 1
I think alot of the 60 ft has to be the way the power comes on with a blower versus the turbo. When I had my 347 the car would pull mid 1.4's leaving off idle-this was on MT ET Streets but it was only a 26" tall tire.
Are leaving with any boost off the line?
Are leaving with any boost off the line?
Le Mans Master
Joined: Jul 2005
Posts: 7,405
Likes: 353
From: New Castle Del.
St. Jude Donor '09
No we are not leaving on any boost. Those runs were leaving at like 1400rpm
Former Vendor
Joined: Mar 2008
Posts: 2,279
Likes: 1
and it's still why I'm a diehard blower guy.
My bosses C5 TTix car ran 9.7's@150+ this summer with a six-speed. Hi sixty foot was only in the 1.6's I believe but the car was only dialed in at around 850 rwhp.
Atomic have you thought about tightening up the stall or have you logged how long you spend in first gear and how much boost you see? From the vid's I saw of your car it and the other Yellow C6Z like yours it doesn't look like you guys get into wot too much in first gear?
Whatever the case is you guys are damn impressive in my books!
Safety Car
Joined: Apr 2004
Posts: 4,097
Likes: 10
From: East Coast
Well said Arun . A supercharged car doesn't need a transbrake , so the term leaving off idle is nothing special , in fact I think if you use a transbrake in an SC car you'll probably blow the tires off . A turbo car must use a transbrake to build boost , it's a lot harder to launch properly and takes a good boost controller to dial it in right .
Pro
Joined: Oct 2008
Posts: 734
Likes: 1
From: Kansas
Talk to any drag racer that has used more than one stall speed converter and size of converter and the 60ft and ET will be all over the place. This is a BIG BIG BIG part if you are trying to set low ET with your setup. Just my 2cents been there done that!
Former Vendor
Joined: Mar 2008
Posts: 2,279
Likes: 1
I believe RickyBobby runs a Coan 10.5" single disc, I'm pretty sure on those runs it wasn't even locked as I don't think they can. I did talk to Greg over at Coan and he was pretty insightful as to what kind of stall would work for our cars-he sure got ti right on Ricky Bobby's car. Greg even said he would take apart the Precision and could fix it up-but he still thinks the 9.5" is too small.
Pro
Joined: Sep 1999
Posts: 562
Likes: 0
From: Chicago IL
I'm a bit more than a lurker right since I haven't replaced my C5Z yet but my old '98 Formula had a 8:1 348ci + a YSi + T400 and then the same block, different cam, + a 88mm T6 turbo + the same TH400 but with a different converter. The YSi setup preferred a big converter, I ran a 4500-5000 stall, came up on boost real fast, and launched hard even at lower rpms like 3000. The turbo setup I had (big turbo, small cubes) required bringing the rpms up before I even staged, and getting on the 'brake at the line was after foot stalling the crap out of it. I went 1.35 with both setups but they were totally different. I went 9.40@144 1.35 5.9 116mph with 680rwhp and 18 psi. I went 9.44@145 turbo 1.35 not sure the power level but it wanted to be shifted a lot higher.
I prefered the blower setup but since you run a 427ci + twins I'm sure the car has really strong mid range. My friend's 2002 TA has gone 8.2@168mph with twins and a 408ci.. Very easy to bring up on boost. Cubes make a huge difference.
I prefered the blower setup but since you run a 427ci + twins I'm sure the car has really strong mid range. My friend's 2002 TA has gone 8.2@168mph with twins and a 408ci.. Very easy to bring up on boost. Cubes make a huge difference.
Thread Starter
Melting Slicks
Joined: Jul 2007
Posts: 2,581
Likes: 15
From: Ohio
Wow, tons of questions.... Ok, I will try to give enough info for all the discussion here.
1st off I can only stall to about 4k before the car starts pushing and normally have not really built up any boost to speak of by the time the lights start dropping. I think with a transbrake we could build more boost, but with the 4L60 we were worried that the trans would not hold the power.
I have a different stall than Rickey, and I do lock mine up. The last time at the track we actually lowered my 1-2 shift since the car was blowing the tires off in first so bad. When we had the earlier shift point the car had better traction. We are making some pretty big changes in this department with all the new information that has been learned.
With the auto, after the car builds boost, it holds it much better than many can with a stick (some are better than others).
As for the NHRA legality, we are supposed to hear a final answer tomorrow. If they cannot certify my car, I am not sure what I will do. It really serves no purpose to have a 8 second C6Z if I cannot race it competitivly.
Thanks for all the good info, lots of finishing touches going into the Z right now, and hopefully we will have it at the NMCA event on May 1 (NHRA certification will be the deciding factor).
1st off I can only stall to about 4k before the car starts pushing and normally have not really built up any boost to speak of by the time the lights start dropping. I think with a transbrake we could build more boost, but with the 4L60 we were worried that the trans would not hold the power.
I have a different stall than Rickey, and I do lock mine up. The last time at the track we actually lowered my 1-2 shift since the car was blowing the tires off in first so bad. When we had the earlier shift point the car had better traction. We are making some pretty big changes in this department with all the new information that has been learned.
With the auto, after the car builds boost, it holds it much better than many can with a stick (some are better than others).
As for the NHRA legality, we are supposed to hear a final answer tomorrow. If they cannot certify my car, I am not sure what I will do. It really serves no purpose to have a 8 second C6Z if I cannot race it competitivly.
Thanks for all the good info, lots of finishing touches going into the Z right now, and hopefully we will have it at the NMCA event on May 1 (NHRA certification will be the deciding factor).
Former Vendor
Joined: Jan 2003
Posts: 760
Likes: 4
From: Round Lake Il
What are you running for boost controller? Being able to adjust the ramp rate in 1st gear by either time or speed will be a huge help in bringing the 60ft down.
Twin 35r's on a 7.0 just light up too damn fast to get traction otherwise.
Also, fwiw I would not remove the mufflers. It's weight leveraged over the rear tires right where you need it and not a restriction at all if it is still the APS system.
Twin 35r's on a 7.0 just light up too damn fast to get traction otherwise.
Also, fwiw I would not remove the mufflers. It's weight leveraged over the rear tires right where you need it and not a restriction at all if it is still the APS system.