finally got some numbers on my 408:confused:
03-14-2010, 05:12 PM
#22
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This is not as bad as i thought after reading the thread, it holds the power well to 6300rpms, the exhaust restriction could be holding a bit down, so maby whith bigger exhaust it will peak a bit higher and maby hold it a bit longer.....
i donīt know that cam, but where should that cam peak in that kind of motor... ? i donīt think itīs a 7000rpmīs cam there.
but nice setup and good luck to you finding this out.
Baezi
i donīt know that cam, but where should that cam peak in that kind of motor... ? i donīt think itīs a 7000rpmīs cam there.
but nice setup and good luck to you finding this out.
Baezi
03-14-2010, 05:16 PM
#23
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like was said earlier,look at your valvetrain..did you measure for the proper preload?correct installed spring height, proper swipe on the valves?and you definately need to open up that exhaust to get the full potential out of it..
03-14-2010, 06:14 PM
#24
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so i finally got tuned after a year and a half, dont know whats really going on but it only put down 492hp/464trq and flatend out by 5700rpm. ill try to post a graph and a video as soon as possible but just would like to see any thoughts on why i may only be putting down these numbers.
the car has a hke408 11.0-1 comp, TFS235's a pat g custom cam with a 247/254 623/623 112+4, yella terra UL, morel linkbar roller lifters, 1 7/8" hooker LT's, 3" cutout (opened on dyno), ported FAST92 and NW96tb ftra 104mm lid, asp ud pulley, speed density, 6speed w/9" and 3.90's. thanks in advance
the car has a hke408 11.0-1 comp, TFS235's a pat g custom cam with a 247/254 623/623 112+4, yella terra UL, morel linkbar roller lifters, 1 7/8" hooker LT's, 3" cutout (opened on dyno), ported FAST92 and NW96tb ftra 104mm lid, asp ud pulley, speed density, 6speed w/9" and 3.90's. thanks in advance
03-14-2010, 08:06 PM
#25
03-15-2010, 01:24 PM
#28
See if you can unhook the y-pipe and throw some extensions on the collectors and dyno it again. If it picks way up, then you found your problem, if not then you can start really looking at the valvetrain.
Or, you can do it the other way around..haha
Either way, good luck
Or, you can do it the other way around..haha
Either way, good luck
03-15-2010, 01:46 PM
#29
See if you can unhook the y-pipe and throw some extensions on the collectors and dyno it again. If it picks way up, then you found your problem, if not then you can start really looking at the valvetrain.
Or, you can do it the other way around..haha
Either way, good luck
Or, you can do it the other way around..haha
Either way, good luck
04-02-2010, 01:04 PM
#32
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no update yet, money is really tight and was laid off. i was thinking about going to the track just to see. i may go next weekend if i can get my lower control arms and relocation brackets in i have a bad bushing in my stock ones. it just bugs me to drive it. i will keep you guys updated and thanks for bringing this back up.
06-11-2010, 12:37 PM
#33
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ok so i got the pushrods looked at and the preload which is at .050 which seems to be ok. idid find that my asp pulley was stripped and not tight anymore. it open up around the crank so bad i was able to pull it off by hand. i put the stock pulley back on and jumped on the dyno yesterday only to find out i picked up 22hp and 10ft lbs with the pulley being tight. it also pulls to around 6,600 or so before starting to drop off again. next is the exhaust so ill keep this updated as i go and hope thats most of my problem. ill post the comparison graph up asap. as of now im at 515/475.
06-11-2010, 05:16 PM
#34
The plugs were changed right before the tuning took place. The tuner didnt talk about the data logging at all with me. I may be taking it to the track in a couple of weeks just want to see if theres an issue first. The clutch is new with only 1,200 miles on it about. Thanks
Mike
06-17-2010, 05:57 PM
#35
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Well i personally didnt monitor the fuel pressure but im sure the tuner looked at all that. I have a walbro 255 pump and 42lb injectors.
07-08-2010, 07:04 PM
#36
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went to the track 2 weeks ago and in 95* heat i ran the best of an 11.74 at 127.98 with a 1.9 60ft. im hitting the rev limiter at the end of the track so i may need to get taller tires. car wieghed in at 3580 with a half a tank of gas and no driver. consistant low 12's. 1st time ever to the track in this car and being a stick. hope to improve next time
07-10-2010, 04:23 AM
#38
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went to the track 2 weeks ago and in 95* heat i ran the best of an 11.74 at 127.98 with a 1.9 60ft. im hitting the rev limiter at the end of the track so i may need to get taller tires. car wieghed in at 3580 with a half a tank of gas and no driver. consistant low 12's. 1st time ever to the track in this car and being a stick. hope to improve next time
the times will drop whith better 60ft and maby you can pick up a mile or two whith taller tires so the combo is working....
are you peaking higher now or?
what pulley where you talking about early this threat, the damper pulley or?
good luck
Baezi
05-25-2011, 11:20 AM
#39
Ok so i had to re-register under a new name cause for some reason i couldnt log in and said it didnt recognize my password to my email. Anyways i got the car looked at and the retainers were pulling through the valves. Got those fixed put on a new asp ud pulley and did a custom merge collector into a true 4" cutout. The previous 3" was just a little piece of pipe attached to the section of pipe that goes over the axle and the opening was more like a 2 1/2" hole not a true 3" cutout though. Also found out that i really have 4.10's not 3.90's. So here it goes
Last edited by CUR4VNM; 05-25-2011 at 11:42 AM.
05-25-2011, 11:26 AM
#40
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Ok so i had to re-register under a new name cause for some reason i couldnt log in and said it didnt recognize my password to my email. Anyways i got the car looked at and the retainers were pulling through the valves. Got those fixed put on a new asp ud pulley and did a custom merge collector into a true 4" cutout. The previous 3" was just a little piece of pipe attached to the section of pipe that goes over the axle and the opening was more like a 2 1/2" hole not a true 3" cutout though. So here it goes
Post results please can't see photo bucket from work..
Thanks