I am running 13.4 with a ZZ4 in my Iroc. I have 2.73 gears and stock tpi plumbing. If I get a superram and 3.73's, how much time can I see drop off? What if I just port the plenum and runners? How much can I expect to pay for all this?

 

I don't have the answers to your questions, but I have questions of my own. This is the same combo that I'm planning to run. I don't have the ZZ-4, but I already have the Superam. How drastic was the difference after the installation of the ZZ-4 and biggest pain during the install. The TPI is known to restrict the potential of the ZZ-4. Magazine articles stress the use of aftermarket TB, manifold and larger runners.Thanks in advance.

 

13.4! Thats awesome. I have not had my ZZ4 to the track yet, but did run 13.81 with my old L98 so I am hoping for similar times. Just gotta get the headers on and to the track I go. I actually am hoping for a little better since I have the Edlebrock Intake and SLP runners and everything is ported and matched. With 3:73 and the superram you should dip into the 12's I'd think. However traction will probably start to be a problem.


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Rob P
89RSconvtZZ4TPI
92Z28convt5spd
71Impala convt 402BB
BETTER DRIVING THRU SUPERIOR HORSEPOWER!

 

What kind of tires are you running? I bet if you move to a drag radial you will see that low 13 turn into a high 12.

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Dan
LPE built 383 A/T Package