89mulletbird,the ta49 is not holding you back,and is capable of going much faster than 107-109mph.the car is definatly nosing over in the backhalf of the track, only picking up 19mph.if the tranny is not hurt,790's on the scanmaster seems rich and you could drop down to the 770 range,as long as there is no knock.the converter is a tricky issue,your et's are excellent for that mph the ac is multiplying torque well,are you loosing mph due to the ac being loose i would say yes.i like the bigger exhaust housings especially on a 9inch nonlocker.24psi is enough boost,add a couple degrees of timing down low drop that 60ft lower,add a larger exhaust housing,the car should drop some et and pickup some mph.
want to upgrade TA-49, need major advice
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89mulletbird
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I DO have a lockup switch, I've just never used it on the track... I'm not sure when to throw the switch?
Mr. Spool, what do you mean by "add a larger exhaust housing"?
I dyno'd my car with race gas at 23# and 26# and my turbo made the same HP at each so I think my turbo is only really good for about 23# of boost.
Mr. Spool, what do you mean by "add a larger exhaust housing"?
I dyno'd my car with race gas at 23# and 26# and my turbo made the same HP at each so I think my turbo is only really good for about 23# of boost.
Pronto
No amount of evidence will ever persuade an idiot.
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The exhaust housing on the turbo...
There's different theories on when to lock the converter. If you lock it in 1st gear it won't actually lock until the 1-2 shift, others lock it in 2nd after 80mph and some in 3rd. One determining factor is you have an aftermarket converter so it might hold up better to locking than the D5, although I've heard of the D5 being locked on 11 second cars and living. I don't lock my D5-yet...
There's different theories on when to lock the converter. If you lock it in 1st gear it won't actually lock until the 1-2 shift, others lock it in 2nd after 80mph and some in 3rd. One determining factor is you have an aftermarket converter so it might hold up better to locking than the D5, although I've heard of the D5 being locked on 11 second cars and living. I don't lock my D5-yet...
He means the a/r of the exhaust housing. Id go for the precision .85 a/r. Your mph will go up and your converter will handle it no problem. You should be locking your converter between 80 and 100 mph. You need to verify its actually locking though. A GM 700 R-4 lockup solenoid works best. The 49 should make power to 27 psi before it dies off. Are you sure its a 49?
89mulletbird,the tune for race gas and alky is different.at 23lbs on a dyno with race gas perhaps makes more power than 26lbs with your combo,but with alky cooling that air should allow you to push the 49 hard and cool the air.regardless of these factors,your 24lb of boost is enough to go more mph.reading your post if you have a lockup you will pickup mph by locking the converter,try middle of 3rd gear,than try locking it right away on the line to see if the car likes the loading early or later each car is different.after your test and tune add more timing on the 1-2 gears, no knock,then add timing in 3rd gently no knock.getting a car to work takes time and patience.
I locked a D-5 over 100 times in a 115+mph car before it wouldnt lock anymore. This was one of the looser d-5's ive ever seen too. Id think a 12 second car could lock at WOT well over 200 times before its shot. It doesnt take much to get your D-5 converter clutch replaced these days either. Chris at CK remanufactures these converters.
Just noticed this thread... I ran a similar combination last year for a little bit except a TE44 instead of a TA49. My combo was as follows:
Stock motor/heads/cam
TE44 @ 26lbs boost
dutt neck
3" THDP
Art Carr 3200 9" converter
RJC PP
50# injectors
Razors alky kit
TT alky chip
11.66@112.95mph with 1.60 60', 7.35@91.8 in the 1/8
I don't think you are running lean since your O2s are still high, but you are probably right on the edge of the injectors being maxed. My mph was low for my ET because of the loose converter, but not as low as yours. You were already 3mph and 3 tenths off of my run at the 1/8th. You are down on power, I'd think. A directscan recording of a run would be nice. With the loose converter, I ran 28" tires because the rpms were starting to get high for a stock cam. Small tires could be hurting your 1/8 to 1/4 mph pickup. A worn turbo could lead to lower than expected results too. Being pig rich could be hurting you also, among many other things. I can't image you being that rich with those injectors though, unless you have the alky on max or something. Usually mine is only about halfway or so (my dial is mounted under the dash and its usually at about the 12 o'clock position with 7 o'clock or so being off).
Your car is still running fairly good, but I'd say you are a couple tenths and a few mph slower than what it could be running for that boost and combo. Also, these small converters aren't meant to be locked at WOT due to the small clutch surfaces. They lock at cruise to help with gas mileage, but the lockup clutch won't hold up long being locked at WOT.
Stock motor/heads/cam
TE44 @ 26lbs boost
dutt neck
3" THDP
Art Carr 3200 9" converter
RJC PP
50# injectors
Razors alky kit
TT alky chip
11.66@112.95mph with 1.60 60', 7.35@91.8 in the 1/8
I don't think you are running lean since your O2s are still high, but you are probably right on the edge of the injectors being maxed. My mph was low for my ET because of the loose converter, but not as low as yours. You were already 3mph and 3 tenths off of my run at the 1/8th. You are down on power, I'd think. A directscan recording of a run would be nice. With the loose converter, I ran 28" tires because the rpms were starting to get high for a stock cam. Small tires could be hurting your 1/8 to 1/4 mph pickup. A worn turbo could lead to lower than expected results too. Being pig rich could be hurting you also, among many other things. I can't image you being that rich with those injectors though, unless you have the alky on max or something. Usually mine is only about halfway or so (my dial is mounted under the dash and its usually at about the 12 o'clock position with 7 o'clock or so being off).
Your car is still running fairly good, but I'd say you are a couple tenths and a few mph slower than what it could be running for that boost and combo. Also, these small converters aren't meant to be locked at WOT due to the small clutch surfaces. They lock at cruise to help with gas mileage, but the lockup clutch won't hold up long being locked at WOT.
89mulletbird
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Yeah I'm running pump gas and the alky on max at the track. Should I go to race gas and turn down the alky??
Does the alky cut my power if I am spraying too much?
I am running 28" tires but my converter is pretty loose and I'm running like 5500rpm at the end of the track. I locked my converter on a run and gained about 3MPH trap speed.
Does the alky cut my power if I am spraying too much?
I am running 28" tires but my converter is pretty loose and I'm running like 5500rpm at the end of the track. I locked my converter on a run and gained about 3MPH trap speed.
Id run the race gas and more timing with the alky. Do not turn down the alky. Pull fuel out of the chip and add timing up to 26 degrees. You will pick up a lot of mph if you do so. Lock your converter around 100 mph. You need to get a wideband and shoot for 11.3-11.5:1 a/f. Then you will know you are maximizing the performance at a safe a/f achieving peak mph for the conditions. I can see your car running 116 mph with the 49.
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