Plague_oc Posted June 24, 2007 Share Posted June 24, 2007 Was just curious as to how gas efficient members V8's are. I know that there are a few V8's like the LS1 that can actually attain a better mpg, but has anyone seen a big increase/decrease with their other swaps? Quote Link to comment Share on other sites More sharing options...
Savage42 Posted June 24, 2007 Share Posted June 24, 2007 http://forums.hybridz.org/showthread.php?t=121665 Quote Link to comment Share on other sites More sharing options...
Plague_oc Posted June 25, 2007 Author Share Posted June 25, 2007 went through that before, wasn't my question. I'm asking what members are getting compared to their stock v6 mpg with non LS engines Quote Link to comment Share on other sites More sharing options...
Administrators BRAAP Posted June 25, 2007 Administrators Share Posted June 25, 2007 went through that before, wasn't my question. I'm asking what members are getting compared to their stock v6 mpg with non LS engines So which 300-ZX cars are you reffering to with V-8 converions, Z-31 or Z-32? Quote Link to comment Share on other sites More sharing options...
Plague_oc Posted June 25, 2007 Author Share Posted June 25, 2007 The 240z-280z, though does it make a difference? Quote Link to comment Share on other sites More sharing options...
John Scott Posted June 25, 2007 Share Posted June 25, 2007 Was just curious as to how gas efficient members V8's are. I know that there are a few V8's like the LS1 that can actually attain a better mpg, but has anyone seen a big increase/decrease with their other swaps? went through that before, wasn't my question. I'm asking what members are getting compared to their stock v6 mpg with non LS engines.... Your original question was kind of vague, not referring to any specific application or model.. I'm currently knocking down high 20s with a carb'd 383, and expect it to get better as I get deeper into the tune. Sounds like the LS has a big advantage in efficiency. Obviously a high strung drag engine with 5000 stall and two speed trans will pull down lower numbers, lol, If mpgs are a priority stick with a trans that has an overdriven final gear. Quote Link to comment Share on other sites More sharing options...
Administrators BRAAP Posted June 25, 2007 Administrators Share Posted June 25, 2007 I was just checking as you mentined V-6, which narowed down the fieled to the 300-ZX line. The earlier cars, 240, 260, 280 Z and ZX have an inline 6, aka, L-6. Mine was typical of most carbed V-8 Z conversions. '75 280 Z with chev 355, W/C T-5 5 speed, 3.90 ratio welded diff, street car, on the way to the drag strip got exactly 20 MPG and ran 12.3 @ 113. The Big Block Chrysler 440 280 Z, Torque Flite 727 with manual shift body bested something like 15 MPG. The EFI cars like the LT 1's and LS-x are doing MUCH better. Ron Tyler's LT 1 6 speed 240-Z with 3.90 ratio diff recorded 28 MPG on the freeway, and he feels the car was worth 30 MPG if more attenion was paid to mileage vs cornering performance, i.e. tires, alignments, gearing, etc. Quote Link to comment Share on other sites More sharing options...
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