Why the hell wont it 60ft

[JDSfastGN]

Yesterday we had a buick meet at the local track and I ran the GN. It was around 96* and well over 70-80% humidity,(track temp was 140 during these runs) so it was definitely not a great day for racing. I should be happy as my two best passes were: (25 psi lifting partially on both passes in 3rd gear as boost spiked for a second after the 3rd shift)
60: 1.75 (7 psi launch)
330:4.836
1/8: 7.45
mph:94.22
1/4: 11.642
mph:116.5

60: 1.71 (10 psi launch)
330:4.799
1/8: 7.428
mph:93.95
1/4:11.61
mph: 116.21
but the car will not 60 ft. Im on 28x9 hoosiers and was hooking up fine. My ?s are regarding the turbo and stall. Its a 3200 stall 10.5" protorque unit, but i don't see 3200 until 6-7 psi and see 3450-3500 at 10 psi. It builds boost and seems to spool up fine at the line and its instant on the street. My 44 has an .85 exhaust housing. I really wanted to upgrade turbos soon but am worried that if i can't 60 with a 44 and a large stall how can i 60 with a PT61. Could the car be too rich in 1st gear? I mean all the ingrediants for a great 60 ft are there... it spools at the line fine(makes me think its not fuel), it dead hooks on the slicks and it has a large stall/small turbo setup . I do have 3.23s now but the car had the same problem before the 3.23s as well and i think a 10 psi launch should be enough. Could the stator not be as high a torque multiplier as compared to my old 9/11? my laptop crashed so i borrowed a friends on these runs so if i get them ill post them up.

 

[WSLN 6]

What does it stall at 0 psi boost? That is probably a better indicator of your stall speed. Sounds either way too tight, or rich down low.
Is your alky coming in too early while you are building boost at the line?

 

[JDSfastGN]

it stalls around 2900 at 0 boost. I have turned the ramp way down on the alky so it comes on with less volume down low, and it really hasnt' made a difference so far. I may look at borrowing a 60 # non alky chip from a friend and making a few passes just to see but i have gone high 1.50s on alky in the past.

 

[Jerryl]

.......... I have turned the ramp way down on the alky so it comes on with less volume down low, and it really hasnt' made a difference so far...........

The PAC has a purple wire that cuts off the alky for staging. (Just need to be grounded)
I mounted that to activate with the transbrake with a roller micro switch. I can post a pic if you'd like.

 

[JDSfastGN]

The PAC has a purple wire that cuts off the alky for staging. (Just need to be grounded)
I mounted that to activate with the transbrake with a roller micro switch. I can post a pic if you'd like.

i will re read the instructions and set that up just for the hell of it. I dont think alky is the problem though as it has 60 fted well in the past on alky. But im willing to try anything. Thanks Jerryl. Were u at the meet yesterday and i missed ya? If not bring it out next time, it was a blast.

 

[ijames]

What have you changed since you got those 1.5 60's?

 

[JDSfastGN]

What have you changed since you got those 1.5 60's?

changes include .85 housing, and the 10.5" protorque converter(my 9/11 was kia) and the 3.23s. It may just be a combo of all of these as the protorque is definitely tighter and the 3.23s are probably not gonna help off the line (although imo more boost at the line should be able to make up for this) and the .85 is gonna hurt low end. But the car does spool insanely at the line and on the street.

 

[c&cgn]

My best guess is the 3.23's and the .85 housing are hurting you with that turbo.

I don't think you are going to have the power to turn a great 60' time with 3.23's. Maybe if it was a mid-low 10 second car.....

 

[Jerryl]

This is what I did.

 

[ijames]

Can you borrow a pair of 26" tires to test the gear theory? I have a hard time believing that even with a .85 exhaust housing your converter isn't enough to spool a 44, especially on a 10 psi launch.

 

[JDSfastGN]

Can you borrow a pair of 26" tires to test the gear theory? I have a hard time believing that even with a .85 exhaust housing your converter isn't enough to spool a 44, especially on a 10 psi launch.

im gonna try to this next weekend. To be honest the car wouldn't 60 well before the 3.23s (I just installed them a month or so ago after i blew up the stock posi/gear set) But i would be willing to try a 26 and see where they gets me. It stopped 60 fting well after the converter and .85 housing. I figured 3200 should be more than enough to spool a 44 with a .85 housing. I added the housing at the same time as the converter so i don't have a baseline for either.

 

[JDSfastGN]

This is what I did.

thanks Jerryl im gonna try this next time

 

[c&cgn]

im gonna try to this next weekend. To be honest the car wouldn't 60 well before the 3.23s (I just installed them a month or so ago after i blew up the stock posi/gear set) But i would be willing to try a 26 and see where they gets me. It stopped 60 fting well after the converter and .85 housing. I figured 3200 should be more than enough to spool a 44 with a .85 housing. I added the housing at the same time as the converter so i don't have a baseline for either.

Too many changes at once...tough to tell exactly where the problem lies. But now I notice you also have 28x9 slicks, which makes your effective gear ratio even higher than 3.23. I think all of those things are working against you.

How quickly does it reach full boost after you launch ?

I have had a converotr that was way too tight, and even though I could build 6 or 7 psi to launch with, it just wouldn't let the boost come up quickly enough after the launch. I would think that the.85 housing, 3.23's and taller tires are all making for a bad 60'.

If you still have a .63 housing, maybe try that first and see if it makes a difference. Maybe even try a garret .63 is you could get your hands on it.

 

[Ryan87GN]

Launch the car at 15psi. Or whatever the highest boost you can hold. If you cant leave the line @15+ with a 44 (minus pushing through the brakes), then you've officially turned your car into a dog.

 

[JDSfastGN]

Too many changes at once...tough to tell exactly where the problem lies. But now I notice you also have 28x9 slicks, which makes your effective gear ratio even higher than 3.23. I think all of those things are working against you.

How quickly does it reach full boost after you launch ?

I have had a converotr that was way too tight, and even though I could build 6 or 7 psi to launch with, it just wouldn't let the boost come up quickly enough after the launch. I would think that the.85 housing, 3.23's and taller tires are all making for a bad 60'.

If you still have a .63 housing, maybe try that first and see if it makes a difference. Maybe even try a garret .63 is you could get your hands on it.

Ill try and take a vid of the boost coming on but just dead flooring it from a stop with no brake boosting its at full boost in under 2 seconds. Launching at a already spooled 10 psi it is almost instantaneous. I think im gonna work on fueling/timing in the chip as well as try some 26" tall tires first before i change housings again. This housing has helped up top quite a bit. I have gone 117.9 converter locked on the .63, and 118 converter unlocked with the .85. I have not locked the TC since the .85 housing though. Thanks guys

 

[TurboDave]

The .85 housing should not be hurting you on a 44. Been running that combo for years. It spooled pretty good with a stock converter, and a little too good with my present 3500 converter.

My guess would be the 3.23 coupled to 28" tires are the killer.