Quote:
Originally Posted by RobbyBeefcake87
I agree with keeping an SS 1le NA but most of what you noted as special about the zl1 on top of the engine/OD, OPs car has; ediff, dampers, forged wheels, and same tires.. but the zl1s dampers were obviously tuned for the extra weight and the diff extra power/torque I assume.
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I was addressing the general just blot a supercharger to the
LT1 ENGINE fixes the car for all occasions.
It is the engine that is prone to heat, the ZL1 has lower comp forged piston, stronger rods, crank, head casting, VALVES!!!!, these are not minor issues to address. As you mention the ZL1 is also a tuned package. I'm not a big roadracer my bro is. I don't know how much faster a ZL1 vs a 1LE in a road race, gut feeling, $6500 injected into a NA 1le, it will be complete blow out, I'll let the forum figure which one is getting blown, pun intended.
Quote:
Originally Posted by RobbyBeefcake87
Also I don't think gm put less gear in the zl1... ss 2.77 vs zl1 2.85, and 3.73s on both m6s.
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The strength of the trans is directly related to the gear ratio and the spacing between the mainshaft and the countershaft, as the gear numeric ratio increased one gear gets smaller and it has to leverage a bigger gear the torque rating of the trans plunges as the sqr of the change.
Here is the actual Tremec doc:
https://www.tremec.com/anexos/TREMEC_TR-6060_1017.pdf
I believe the 1le has the same trans as a SS so that torque limit is 560 ft-lbs.
This is from the dudes that make the transmission. So this same trans on the 2015 ZL1 was at the engine's design max torque:
https://media.gm.com/media/us/en/che...2015.tab1.html
When the Lt4 came out it required a stronger trans:
https://www.camaro6.com/forums/showthread.php?t=482277
go back to Tremec the guys that make the trans and sure enough the 2.29 first gear trans is rated at 650 ft - lbs.
And 2.29 Zl1 is way less torque multiplication like 60 ft pounds at the tailshaft. SS is 2.66
GM left it that way as the stock LT4 can easily destroy the back tires in 1st gear.
Looks like the ZLE comes with the 2.26, probably for a closer road race spacing.
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Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.