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what are minimum mods for topswaping? not in the guides

Z34Phoenix

Z34Phoenix

Florida Tuner
ok so im getting ready to topswap at the end of the month and was looking over all the modding guides and i can not find a list of the minimum mods in order to run a 3.8" pulley on a l36. i know most topswap kits come with/recommend a larger pulley. and i was told a 3.8 on a topswap is similar to a 3.4 on a l67....

1) min mods to safely run a 3.8 topswaped

2) is a 3.8 topswap = 3.4 l67?

3) i will have the following mods: intake, ported TB, gasket matched LIM, ported heads, Si valves, SD headers, no cat, 2.5" catback, tuning.
 


i doubt theres a set formula when it comes down to it.
its safe to assume that 3.8 top swap is like 3.4-3.6 l67.
your ported heads will really help with the flow. because of that, you can probably even drop to a 3.6 on your top swap setup, but the only way to be sure of that is to throw the 3.8 on there and see how that runs.
 
Normally they go with a 4" pulley. You look safe to run the 3.8" with your mods.

Not sure about the boost levels compared to the L67 though. Gonna have to check and see what kind of boost you're making on your setup.

Though with your tuning skills, you should be able to get down to a 3.6" safely.
 


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