what am I doing wrong?? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

MoeIv · 12-10-2016, 08:30 AM

Went to the drag strip for the first time on the new setup:
IPS turbo kit on 9.5 psi
TH400 with 3500 stall from circle D with the stock 3.27 rear gears
stock everything else
running on 18x10.5 race stars in the rear wrapped in 305/40/18mt s/s
and 17x7 welds in the front.

Car is a dog coming off the line but once it gets into boost it hauls ass. Tried experimenting launching at different rpms, slowest time was launching from idle and fastest was launching from 3k rpm at 0 pounds of boost. As a result my 60ft are disastrous. I know with a proper launch and a decent 60ft i can get into the low 11's.

Help me out

frankwjr · 12-10-2016, 08:37 AM

How do you launch at 3k with 0 boost??? Stock block/cam setup? A turbo launching off the line at 0 boost make absolutely no sense....did you get the car dyno tuned? So may questions....update your sig with your setup so peeps can reply based on relevant info...peace out....

also your converter is stalling at 3500k!!!! IMHO your launch rpm minimum should 3500..prob more like 4k....hope your axles live...good luck!

MoeIv · 12-10-2016, 08:55 AM

Quote:

Originally Posted by frankwjr

How do you launch at 3k with 0 boost??? Stock block/cam setup? A turbo launching off the line at 0 boost make absolutely no sense....did you get the car dyno tuned? So may questions....update your sig with your setup so peeps can reply based on relevant info...peace out....

also your converter is stalling at 3500k!!!! IMHO your launch rpm minimum should 3500..prob more like 4k....hope your axles live...good luck!

I meant that I can't build boost when I'm staging without the car inching forward, brakes don't hold that also answers your question about me not launching at 4K.

As far my setup goes,it's a stock block stock cam no meth full weight.
Car has been dyno tuned

Foundryrat · 12-10-2016, 12:10 PM

change the rear gear to around 411

Elite Engineering · 12-10-2016, 03:45 PM

frankwrx is correct. Way to little stall for a turbo car. You need to be up into the mid to high 4,000's.....I would target 4800-4900 for launch in order to get the turbo spooled up. Do that and you should drop a second off those times and have your 60' down in the 1.40-1.50 range.

Gears are also not the best fro launch, a 3.91 would be better. But most of your issue is in the low of stall. If you had a P blower, then go that low, but NA or turbo needs far more stall.

:cheers:

Chris_allstock · 12-10-2016, 04:17 PM

Even with no boost taking off 60ft should be better. Are u spinning? Mt street r are real good radials. I'm taking off on no boost cutting 1.5 60fts on mickey thompson et streets. Stalling to only 2500

Chris_allstock · 12-10-2016, 04:19 PM

Order a 2 step for consistent launches

MoeIv · 12-11-2016, 12:38 AM

Quote:

Originally Posted by Elite Engineering

frankwrx is correct. Way to little stall for a turbo car. You need to be up into the mid to high 4,000's.....I would target 4800-4900 for launch in order to get the turbo spooled up. Do that and you should drop a second off those times and have your 60' down in the 1.40-1.50 range.

Gears are also not the best fro launch, a 3.91 would be better. But most of your issue is in the low of stall. If you had a P blower, then go that low, but NA or turbo needs far more stall.

:cheers:

Makes sense, I went for that stall based on circle D's recommendation. I guess I might need to send it out for a restall

MoeIv · 12-11-2016, 12:42 AM

Quote:

Originally Posted by Chris_allstock

Even with no boost taking off 60ft should be better. Are u spinning? Mt street r are real good radials. I'm taking off on no boost cutting 1.5 60fts on mickey thompson et streets. Stalling to only 2500

No spinning at all the tires are great. My issue is in the launch, car is a dog till it gets into boost. I have another test and tune this upcoming weekend I'll try to get 3.81's and a 2-step before that and see how It works.

Mr. Nasty · 12-11-2016, 07:05 AM

With the 400 you need more gear 3.91 would help on the bottom . I'm S/C with the 4L80 and 3.91 60' mid 1.40s low 1.50s

MoeIv · 12-11-2016, 03:58 PM

Quote:

Originally Posted by Mr. Nasty

With the 400 you need more gear 3.91 would help on the bottom . I'm S/C with the 4L80 and 3.91 60' mid 1.40s low 1.50s

But don't turbos like load? I've read around that the 3.23 works better than 3.91 for turbo setups as 3.91's would make the th400 shift to the next gear asap

Mr. Nasty · 12-11-2016, 05:04 PM

The 400 gear are long. If you was running the 6l with the 3.23 it would be fine. What's your RPM at the trap line? The 4.10 gear out there may not hold up their not made as good as the GM 3.91. If they was I would run them. I myself want to trap as close to 7000 rpm as I can. I have more room so I need more gear or more HP.

Bo White · 12-11-2016, 06:14 PM

Yep. Tall gearing.

swiftkart · 12-12-2016, 06:40 AM

Yukon makes a strong gear set, they have plenty of options 3.45, 3.73, 3.90, 4.11, 4.56, etc...I've been running the 3.90's for a couple of years now.

12-10-2016, 08:30 AM	#1
MoeIv Drives: IOM 2SS/RS Join Date: Dec 2011 Location: Qatar Posts: 702	what am I doing wrong?? Went to the drag strip for the first time on the new setup: IPS turbo kit on 9.5 psi TH400 with 3500 stall from circle D with the stock 3.27 rear gears stock everything else running on 18x10.5 race stars in the rear wrapped in 305/40/18mt s/s and 17x7 welds in the front. Car is a dog coming off the line but once it gets into boost it hauls ass. Tried experimenting launching at different rpms, slowest time was launching from idle and fastest was launching from 3k rpm at 0 pounds of boost. As a result my 60ft are disastrous. I know with a proper launch and a decent 60ft i can get into the low 11's. Help me out Attached Images

12-10-2016, 08:37 AM	#2
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,445	How do you launch at 3k with 0 boost??? Stock block/cam setup? A turbo launching off the line at 0 boost make absolutely no sense....did you get the car dyno tuned? So may questions....update your sig with your setup so peeps can reply based on relevant info...peace out.... also your converter is stalling at 3500k!!!! IMHO your launch rpm minimum should 3500..prob more like 4k....hope your axles live...good luck! __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me... Last edited by frankwjr; 12-10-2016 at 08:40 AM. Reason: more

12-10-2016, 04:17 PM	#6
Chris_allstock Drives: 2014 Camaro ss Join Date: Nov 2014 Location: Los Angeles Posts: 17	Even with no boost taking off 60ft should be better. Are u spinning? Mt street r are real good radials. I'm taking off on no boost cutting 1.5 60fts on mickey thompson et streets. Stalling to only 2500 __________________

12-10-2016, 04:19 PM	#7
Chris_allstock Drives: 2014 Camaro ss Join Date: Nov 2014 Location: Los Angeles Posts: 17	Order a 2 step for consistent launches __________________

12-11-2016, 07:05 AM	#10
Mr. Nasty Emerald Coast Camaros Drives: 2010 RS/SS Rally Yellow & 68 SS Join Date: Dec 2012 Location: Woodville,FL. Posts: 1,814	With the 400 you need more gear 3.91 would help on the bottom . I'm S/C with the 4L80 and 3.91 60' mid 1.40s low 1.50s __________________ Best @ 586/525 =10.41 @ 133 AS OF 12/13/14>633 RWHP =10.22@135 AS OF 1/31/15 @ 633 RWHP=10.16@135 AS OF 1/29/16 @ 633 RWHP=10.10@136 TOPED 700 PASSES AFTER F.I. AND STILL ON THE ORIGIANAL STOCK AXLE & DIFF

12-10-2016, 12:10 PM	#4
Foundryrat Drives: 2014 camaro convertible rs Join Date: Jul 2016 Location: Defiance ohio Posts: 29	change the rear gear to around 411

12-10-2016, 03:45 PM	#5
Elite Engineering Drives: 2010 Camaro Join Date: Nov 2009 Location: Denver Posts: 1,382	frankwrx is correct. Way to little stall for a turbo car. You need to be up into the mid to high 4,000's.....I would target 4800-4900 for launch in order to get the turbo spooled up. Do that and you should drop a second off those times and have your 60' down in the 1.40-1.50 range. Gears are also not the best fro launch, a 3.91 would be better. But most of your issue is in the low of stall. If you had a P blower, then go that low, but NA or turbo needs far more stall. :cheers:

12-11-2016, 05:04 PM	#12
Mr. Nasty Emerald Coast Camaros Drives: 2010 RS/SS Rally Yellow & 68 SS Join Date: Dec 2012 Location: Woodville,FL. Posts: 1,814	The 400 gear are long. If you was running the 6l with the 3.23 it would be fine. What's your RPM at the trap line? The 4.10 gear out there may not hold up their not made as good as the GM 3.91. If they was I would run them. I myself want to trap as close to 7000 rpm as I can. I have more room so I need more gear or more HP. __________________ Best @ 586/525 =10.41 @ 133 AS OF 12/13/14>633 RWHP =10.22@135 AS OF 1/31/15 @ 633 RWHP=10.16@135 AS OF 1/29/16 @ 633 RWHP=10.10@136 TOPED 700 PASSES AFTER F.I. AND STILL ON THE ORIGIANAL STOCK AXLE & DIFF

12-11-2016, 06:14 PM	#13
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,019	Yep. Tall gearing. __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

12-12-2016, 06:40 AM	#14
swiftkart Drives: 2010 SS/RS LS3 M6 Join Date: Apr 2011 Location: Kansas Posts: 693	Yukon makes a strong gear set, they have plenty of options 3.45, 3.73, 3.90, 4.11, 4.56, etc...I've been running the 3.90's for a couple of years now.