Looking to build a super street class car

96&98_camaro_z28 · 10-30-2013, 04:18 PM

Ok guys I have 1998 camaro z28 with a ls1 and a 6 speed it will be a heads cam and full bolt on car by next year I want to run set with the car has any one used a newer ls motor in set for most of the track I'll be racing a it is 11.05 index car should run 10.50 all out i know I need to throttle stop the car to slow it down

Tom Goldman · 10-30-2013, 11:20 PM

Technically , according to the NHRA rule book , active, timer controlled throttle stop equipped cars are supposed to dial their respective index's , ie 10.90, 9.90 ,8.90 , when bracket racing in Super ET.
I know of at least one LS powered dragster that runs in Super , and has also run in Super Comp.
You just need to program the fuel curve accordingly when the car is on the stop, not much different than a carb car.

96&98_camaro_z28 · 11-01-2013, 01:38 PM

my understanding is anything over 2000 feet above sea level is corrected altitude so the correction factor is in the dial in time my big concern is trying to figure out how to do a throttle stop on a LS style intake manifold

Tom Goldman · 11-04-2013, 11:58 AM

Probably a small diameter linkage stop will work .
I would replace the OEM throttle cable with a Morse type cable , Fabricate a bracket for the manifold end to support the cable and connect to the throttle body with a pneumatic cylinder .
Try contacting Bob Phillips at Advanced Control Devices .
He has a number of different .90 stops , most are small diameter and short in overall length .
I'm assuming you no longer are using a drive by wire throttle body .

RacingRicki · 11-04-2013, 08:22 PM

A linkage stop is the way to go like Tom says. Assuming of course you have linkage and a separate throttle position sensor (TPS). The TPS needs to know when the stop is on so that the ECU can change the fuel accordingly. If the TPS is hooked to the throttle body throttle plate shaft, it will get the signal right when the throttle stop kicks on.

Not sure how much tunability you have on the EFI system; but you may want to be able to adjust the amount of fuel while on the stop. Also if you are running it in closed loop you will have difficultly predicting performance because the ECU is adjusting based on temp, pressure, o2, etc. You would be better off to get the tune up right for the track you are at and run in open loop.

10-30-2013, 04:18 PM	#1
96&98_camaro_z28 Junior Member Join Date: Oct 2013 Location: Nebraska Posts: 3 Likes: 0 Liked 0 Times in 0 Posts	Looking to build a super street class car Ok guys I have 1998 camaro z28 with a ls1 and a 6 speed it will be a heads cam and full bolt on car by next year I want to run set with the car has any one used a newer ls motor in set for most of the track I'll be racing a it is 11.05 index car should run 10.50 all out i know I need to throttle stop the car to slow it down

10-30-2013, 11:20 PM	#2
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,438 Likes: 785 Liked 703 Times in 206 Posts	Re: Looking to build a super street class car Technically , according to the NHRA rule book , active, timer controlled throttle stop equipped cars are supposed to dial their respective index's , ie 10.90, 9.90 ,8.90 , when bracket racing in Super ET. I know of at least one LS powered dragster that runs in Super , and has also run in Super Comp. You just need to program the fuel curve accordingly when the car is on the stop, not much different than a carb car. __________________ Tom Goldman 1500 SG , 1506 STK

11-01-2013, 01:38 PM	#3
96&98_camaro_z28 Junior Member Join Date: Oct 2013 Location: Nebraska Posts: 3 Likes: 0 Liked 0 Times in 0 Posts	Re: Looking to build a super street class car my understanding is anything over 2000 feet above sea level is corrected altitude so the correction factor is in the dial in time my big concern is trying to figure out how to do a throttle stop on a LS style intake manifold

11-04-2013, 11:58 AM	#4
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,438 Likes: 785 Liked 703 Times in 206 Posts	Re: Looking to build a super street class car Probably a small diameter linkage stop will work . I would replace the OEM throttle cable with a Morse type cable , Fabricate a bracket for the manifold end to support the cable and connect to the throttle body with a pneumatic cylinder . Try contacting Bob Phillips at Advanced Control Devices . He has a number of different .90 stops , most are small diameter and short in overall length . I'm assuming you no longer are using a drive by wire throttle body . __________________ Tom Goldman 1500 SG , 1506 STK

11-04-2013, 08:22 PM	#5
RacingRicki Sponsor Join Date: Sep 2005 Location: Colorado Posts: 106 Likes: 0 Liked 0 Times in 0 Posts	Re: Looking to build a super street class car A linkage stop is the way to go like Tom says. Assuming of course you have linkage and a separate throttle position sensor (TPS). The TPS needs to know when the stop is on so that the ECU can change the fuel accordingly. If the TPS is hooked to the throttle body throttle plate shaft, it will get the signal right when the throttle stop kicks on. Not sure how much tunability you have on the EFI system; but you may want to be able to adjust the amount of fuel while on the stop. Also if you are running it in closed loop you will have difficultly predicting performance because the ECU is adjusting based on temp, pressure, o2, etc. You would be better off to get the tune up right for the track you are at and run in open loop. __________________ RacingRicki