4.5L Whipple LS Drag Week project.
11-01-2014, 08:18 PM
#21
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Here is an old build thread when I put the first motor in it...
https://ls1tech.com/forums/carburete...-ls-coupe.html
https://ls1tech.com/forums/carburete...-ls-coupe.html
11-02-2014, 09:13 AM
#23
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I got my first test/tune outing with the new 4.5L whipple and it went pretty good. The air sucked (DA @5500”) but I got a few good passes and it got a decent tune in it.
The first thing I found out pretty quick is that my converter is WAY too tight. It drops over 2000 RPM between shifts and hits like a freakin’ hammer when you shift. The most boost I could get out of it with the air I had to work with and the only pulley I had was about 12 lbs... I gotta get a new blower pulley before I go out again. But my best pass of the day was 9.0 @ 153. I could have probably done a little better but I tach stopped working so I had to guess where to ****. Most of the time I shifted early (mid/low/high 7000’s) and the converter would the engine and blower speed down 2000 RPM and kill the boost... Very frustrating. But I can fix all of that so no worries.
Below is a video of my last pass for the day. You can clearly see how hard it’s shifting LOL!
The first thing I found out pretty quick is that my converter is WAY too tight. It drops over 2000 RPM between shifts and hits like a freakin’ hammer when you shift. The most boost I could get out of it with the air I had to work with and the only pulley I had was about 12 lbs... I gotta get a new blower pulley before I go out again. But my best pass of the day was 9.0 @ 153. I could have probably done a little better but I tach stopped working so I had to guess where to ****. Most of the time I shifted early (mid/low/high 7000’s) and the converter would the engine and blower speed down 2000 RPM and kill the boost... Very frustrating. But I can fix all of that so no worries.
Below is a video of my last pass for the day. You can clearly see how hard it’s shifting LOL!
Last edited by LSmonster; 11-02-2014 at 09:21 AM.
11-02-2014, 10:21 AM
#27
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I'm running a 4.5" pulley up top. And I just looked at my data logs again, and on the pass in the video it's dropping 2,464 RPM when I shift!!! I have near ZERO % slippage! LMAO!
11-02-2014, 01:01 PM
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Nice! I've been on the fence about getting the big innercooler (2" taller) but now I will feel better about the standard one if I decide to keep it. Do you think a taller innercooler would help much? I figure if I'm going to cut the hood, I may as well stick it out further. lol
11-02-2014, 01:07 PM
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Nice! I've been on the fence about getting the big innercooler (2" taller) but now I will feel better about the standard one if I decide to keep it. Do you think a taller innercooler would help much? I figure if I'm going to cut the hood, I may as well stick it out further. lol
I super cool the intercooler then add 5 gallons of ice/water to my supply tank before the pass... It's as good as it's gonna get.