2004 Procharged Trex M6 GTO
07-04-2010, 06:17 AM
#1
2004 Procharged Trex M6 GTO This is a friend of mine's car we just got everything all together to make a few pulls and take it to the track. I tuned the car with the procharger setup but I didn't do the previous N/A tune. Stock bottom end LS1.
Naturally aspirated mods
Trex cam 242-248 110 LSA (Not even close to a boost cam)
Fast 90 intake
New Era CAI
Pacesetter headers with stock exhaust
LS7 Clutch
New mods
D1sc procharger 9-10 psi (hard to make boost with 25 degrees of overlap)
LS6 intake with ported t/b
Devils Own methanol kit
Magnaflow exhaust with no cats
3.91 gears and aluminum driveshaft
60lb injectors with single walbro, need another one
2 Bar SD tune
Look how much torque it gained at 3000 rpm! 500 rwtq from 4800-5900 rpm, thats a Trex cam for ya lol. Now we all know this is not the right cam at all, he will be building a 408 in the near future built for boost. This was just to see what we could do with the LS1.
With a better 60' we will have his car in the 10's soon. Best pass so far is a 11.32 @ 126 with a 1.74 60'. 2200' elevation and 3000' density altitude.
http://www.youtube.com/watch?v=ztWKVR_0DQI
Naturally aspirated mods
Trex cam 242-248 110 LSA (Not even close to a boost cam)
Fast 90 intake
New Era CAI
Pacesetter headers with stock exhaust
LS7 Clutch
New mods
D1sc procharger 9-10 psi (hard to make boost with 25 degrees of overlap)
LS6 intake with ported t/b
Devils Own methanol kit
Magnaflow exhaust with no cats
3.91 gears and aluminum driveshaft
60lb injectors with single walbro, need another one
2 Bar SD tune
Look how much torque it gained at 3000 rpm! 500 rwtq from 4800-5900 rpm, thats a Trex cam for ya lol. Now we all know this is not the right cam at all, he will be building a 408 in the near future built for boost. This was just to see what we could do with the LS1.
With a better 60' we will have his car in the 10's soon. Best pass so far is a 11.32 @ 126 with a 1.74 60'. 2200' elevation and 3000' density altitude.
http://www.youtube.com/watch?v=ztWKVR_0DQI
07-05-2010, 12:05 AM
#2
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I didn't think that cam would be good on boost but damn, the car def runs and makes great power. Sounds nasty aswell.
I think the only thing left to consider is ditch what looks to be the late 80's early 90's vette tornado wheels and get a lighter drag wheel setup.
I think the only thing left to consider is ditch what looks to be the late 80's early 90's vette tornado wheels and get a lighter drag wheel setup.
07-09-2010, 03:26 PM
#6
It will go 10's on the current setup. AFR was at 9.5-10:1 at the track and he was only launching at 3800 rpm. He will be building a 408 which will have a boost friendly cam. For a 4000 lb car @ 2300' elevation 126 mph is moving out! Yes a better cam should help a lot. Last year the car went 10.9's @ 128 mph with a 1.55 60', he was running a 150 shot last year.
I really think the belt is slipping, it was making 9 lbs with the 3.8" pulley and now he's running a 3.4" and only making 10.5lbs. He doesn't really want to make anymore boost than that as we don't want to blow the stock bottom end yet.
I really think the belt is slipping, it was making 9 lbs with the 3.8" pulley and now he's running a 3.4" and only making 10.5lbs. He doesn't really want to make anymore boost than that as we don't want to blow the stock bottom end yet.
Last edited by Nitroused383; 07-09-2010 at 03:33 PM.
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07-09-2010, 08:18 PM
#9
Elevation really doesn't matter that much when you have 10psi...it isn't the same as a NA car...the correction factor is alot lower...
For reference,
from a 3000ft DA to 0ft DA on a NA car will gain about 4mph
while a boosted car from 3000ft to 0ft will see about 1.5mph gain
those are rough examples but check out dragtimes.com they have a generic calc too
For reference,
from a 3000ft DA to 0ft DA on a NA car will gain about 4mph
while a boosted car from 3000ft to 0ft will see about 1.5mph gain
those are rough examples but check out dragtimes.com they have a generic calc too
07-09-2010, 09:12 PM
#10
Of course I do agree, the NHRA altitude correction website says to only use half of the correction factor for turbo / supercharged engines. Basically if the car were at sea level it would make 1 more lb of boost, since we see about 13.6-.7 psi (94-95 kpa) of air pressure at our elevation.
This is a good little article too http://www.2-stroke-porting.com/altiden.htm
This is a good little article too http://www.2-stroke-porting.com/altiden.htm
07-10-2010, 03:34 PM
#12
HPtuners logs with NGK AFX wideband showed 11.3-11.5 through the entire curve. The probe on the exhaust pipe was moving back during ever pull. Fun trying to tune a car that drops to 40 psi of fuel. Single walbro and 60lb injectors are not enough, even with meth.
08-23-2010, 06:06 AM
#18
I was out jet skiing for the weekend so I didn't get to see the car make the pass. When he told me it ran a 10.7 @ 129 I about crapped, it still has the street tune in it because I didn't want him to blow the damn thing up, the methanol pump has already quit on him atleast 4 times during a pass. Thank god I've absorbed some of the knowledge Frost has posted on the hptuners forums over the years or this thing would be a boat anchor right now.
