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9 second 1g auto drag build

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11secDSM said:
My Sinister converter worked on the 6262 but the 6766 blew right trough it, hence the mph loss. The IPT converter is just a stock restall, like this Hughes. The Hughes seems to be working for me so i'll stick to it for the season. If i'm not happy with the results once we turn the boost up, i'll probably either get a Bradco or build a 2g trans and get a Precision converter for next season.
Click to expand...

+1 on the bradco converter. Havent had a whole lot of testing on it but so far so good. Its definetly efficient as hell on the big end. Hard to determine how loose it is down low because my new cams killed torque down low. With a 67mm I'm leaving at 3400rpm on about 12psi. Still haven't had the chance to up the two step from there.
 
black97spyder said:
So did I make the wrong choice of converter to get me to mid 9's?? Even though It's a a ways away for me still... I was wanting a 6766 like you, but might consider something a little smaller. Really had my heart set on the 6766 or hx40 though.

Also What is good about the precision and bradco converters?? Haven't heard much about them
Click to expand...

I can't really speculate on your Sinister converter. I just know it wasn't tight enough up top for a 67mm. As for the Precision (2g converter) and Bradco (1g converter), both are loose down low and very tight up top. It's a very difficult combo to achieve. They just work (so far through limited testing on the Bradco).


kp116 said:
+1 on the bradco converter. Havent had a whole lot of testing on it but so far so good. Its definetly efficient as hell on the big end. Hard to determine how loose it is down low because my new cams killed torque down low. With a 67mm I'm leaving at 3400rpm on about 12psi. Still haven't had the chance to up the two step from there.
Click to expand...

I hear ya on the big cam issues...I have the same problem. My car makes zero torque down low. LOL! Have you played w/ the tune down there to see how high you can get the converter up. I bet if you can get it up to the higher 3s, it'll get over the hump pretty easily. DSMivec seems like it could work too!
 
yeah, shit happens! All the damage is fixed luckily. Today I actually swapped in a B&M shifter setup. Made an adapter out of 1/4" plate steel that fit both the footprint of the stock shifter and the B&M shifter and then welded that to the B&M base since I have no plans of ever using it in a Mustang. :) Sorry for the shitty pics. Broke my phone a few weeks ago so i'm using an old iphone 3g that i had laying around. :(


photo8.jpg


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photo5a.jpg


photo5-2.jpg
 
11secDSM said:
I can't really speculate on your Sinister converter. I just know it wasn't tight enough up top for a 67mm. As for the Precision (2g converter) and Bradco (1g converter), both are loose down low and very tight up top. It's a very difficult combo to achieve. They just work (so far through limited testing on the Bradco).




I hear ya on the big cam issues...I have the same problem. My car makes zero torque down low. LOL! Have you played w/ the tune down there to see how high you can get the converter up. I bet if you can get it up to the higher 3s, it'll get over the hump pretty easily. DSMivec seems like it could work too!
Click to expand...

Haven't really played with it to much but can only footbrake it to around 2k. I'm also pulling timing as soon as its floored so that instantly kills torque even more. Nitrous sprays sooner via tps then retards timing at full throttle. Kind of tricky to part throttle it so nitrous turns on but doesn't pull timing right away.
 
Mine are the "high lift" 284/280 kelfords. Last year I could foot brake my ipt 9" to 3500. It almost was enough to get over the hump but not quite enough. That was with kelford 272's.
 
11secDSM said:
Ahhhh, didn't know you switched! Have you dynoed the new setup?
Click to expand...

Sorta... LOL borrowed a two wheel dyno for tuning but everything went wrong on the dyno and the only real numbers we got it was on wastegate pressure 24psi. It made right around 500whp on a dynamics dyno. Fixed the issues the next day and street tuned it like we always do and everything went perfect.
 
11secDSM said:
I hear ya on the big cam issues...I have the same problem. My car makes zero torque down low.
Click to expand...

I'm guessing with a car that runs 9's, your "zero" torque doesn't last very long and more than makes up for it? Or are you wishing you had gone with a smaller cam? I'm on the 272 or 280 debate myself so thought I'd ask.
 
At the track (other than stalling up the converter off the nitrous) I don't feel the effects of the big cams. The car barely ever sees the streets as it was purpose built for the track...it could, but doesn't. The upper RPM gains are well worth the low end losses in this application. I wouldn't want them for a primarily street driven car though. I'd go down to a Kelford 272 for that.
 
11secDSM said:
I can't really speculate on your Sinister converter. I just know it wasn't tight enough up top for a 67mm. As for the Precision (2g converter) and Bradco (1g converter), both are loose down low and very tight up top. It's a very difficult combo to achieve. They just work (so far through limited testing on the Bradco).




I hear ya on the big cam issues...I have the same problem. My car makes zero torque down low. LOL! Have you played w/ the tune down there to see how high you can get the converter up. I bet if you can get it up to the higher 3s, it'll get over the hump pretty easily. DSMivec seems like it could work too!
Click to expand...


I am in the same as you guys. Im running bc 288's on this sinister 8" core 2 and It's hard to get any power down low as my cams power just creep in around 2700 rpm but i can still get a footbrake stall of 3400 and about 7 psi (10 psi is my max until I get all the bugs worked out) on my little baby 16g and that's with an exhaust leak at the head due to a warped flange and several in my stock Downpipe as well as a few boost leaks and no tune or Dsmlink. With all that being said I know this converter has a TON more left in It and should work great when i move up to a hx40 and a t3 exhaust!

I'm still playing with my converter at stop signs to try to get the hang of brake boosting as I've only drove this car about a week and a half. Hopefully I can get all my small bugs worked out and get into the 4k range on my converter and launch real hard.


Good job on getting everything fixed! Hopefully you see some more personal bests when you get the car to the track finally!!!!
 
The car is also back together and awaiting a trip to the track...hopefully later this week, weather depending.

Also, a buddy of mine put together some footage he filmed and uploaded it today.


[ame=http://youtu.be/AD4cXSBY9T8]6766 1g Eclipse drag car racing! Nasty awd launches K.P. Tuning - YouTube[/ame]
 
Figures. Always something isn't it? I just got mine all together and having wideband issues. Would love it if things were simple.
 
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