2jz vs ls1

[Ls1pwr]

TO: WDRacing

hey now, im gonna have my cake and eat it too!! its amazing how good the gas mileage is in an ls1. **** man i wouldnt believe u if u told me that the 427 ls7 with 500hp and 450lbs gets 28mpg on the highway when a 2008 honda civic 1.8L 140hp only gets 34mpg highway!!!!!! thats almost 4 times the power and displacement but only 6 mpg difference. I dont care about gas mileage as much as i do about performance, but if i can have both then im going to enjoy it and smile every time i fill it up.

TO: mantis

i'd assume the reason they get the 20mpg is the stock rear gear ratio of 4.06 or 4.10 i believe? that will kill gas mileage and so will a lead foot.

[WDRacing]

TO: mantis

i'd assume the reason they get the 20mpg is the stock rear gear ratio of 4.06 or 4.10 i believe? that will kill gas mileage and so will a lead foot.

240? 4.08 in my S14 IIRC.

[RCA]

I'm pretty sure most people that remove the 4 cylinder and install the V8 aren't really concerned with gas mileage. It also makes me want to throw up a little when we mention mpg in a motor comparison thread that is based on performance

WD

Well I am sorry I brought it up. But I guess now-a-days you need to. Gas isn't going down and we aren't getting paid more. But I brought up MPG when discussing turbo lag.It was an opinion statement. For me my S14 JZ would be a DD so MPG is a real issue for me. It is not the reason I want to swap a JZ in my car but more like a bonus.

And Yea 4.08 is right.

To: Ls1pwr Your 98 Trans AM LS1 is not the LS2 in the Vettes. Unless you are shifting from 1st to 4th when driving your MPG wont be close to that of the C6's. Although you gearing is set up to save some MPG, I know it will not result in a 26mpg rating.

3L MPG > 5.7L MPG but if you don't think so...Prove it! Oh that would mean you would need to contribute to NICO! OMG that requires effort. Oh well!Ignorance is blissSo rock on with your bad a** self!
Modified by rcabrita at 7:58 PM 7/1/2008

[Ls1pwr]

lol your getting a little worked up arent ya? good ****. so where are your facts that an ls2 gets better mpg then an ls1? the ls1 is a 5.7, ls2 is a 6.0 it has different heads and more displacement, there is basically no difference in mpg between the ls1 and ls2. anyways do u really want me to post up the supra mpg vs the corvettes?

1996 toyota supra 6 speed mpg : 17/23http://www.cargurus.com/Cars/O....html FACT!

2006 c6 corvette 6 speed: 18/28 http://en.wikipedia.org/wiki/Chevrolet_Corvette_C6 FACT!

and for ur comment about C.A.G.S. it doesnt effect highway mpg one bit.

again ur comment that 3.0 *TURBO* i-6 > v8 doesnt look to be true.

[RCA]

You dont own a C6 PLEASE stop quoteing MPGs from one. Man your thick. Find out what an LS1 in a S13 gets.Not an LS2 in a C6

It's a reputable websitehttp://www.fueleconomy.gov/feg...12556

98' Poniac Fire Bird Trans amhttp://www.fueleconomy.gov/feg...14126

So I guess it seems that the LS1 gets better MPG. But What I dont understand is how a high compressed V-8 can get better city MPG #s then a 3.0L-Turbo

If you shift early enough you dont achieve any boost. When the engine does not run on boost it has the characteristics of a 3.0L N/A engine. But according to the numbers that isn't the case. Does any one else agree?But we will never know the exact #s unless we test.

[Ls1pwr]

thats an automatic aswell, which gets less gas mileage then the 6-speed. i think the 900lbs will definately help gas mileage, seeing as the trans am weighed 3700 lbs and got 17/26 with a 6 speed and 3.42's.

same site: 1999 trans am 6 speed.http://www.fueleconomy.gov/feg...14908

i'll have an 02 ls1 and t56 in my car with the q45 ring and pinion (3.60) gear ratio 900 lbs lighter, i think its safe to say that it will get better gas mileage then my trans am did. its also more aerodynamic as well.

[RCA]

Well 3.60 gears VS 3.40 gears would then mean that you have shorter gearing. That would make you potential MPG worse then if you had 3.40.

But TOUCHE, you win this round!

**But seriously test your MPG**
Modified by rcabrita at 12:49 PM 7/2/2008

[1991h9]

you guys know where to get a complete set up for a ls1

[nmssr08]

you guys know where to get a complete set up for a ls1

for swap kit, go to http://www.pxracing.com i used their kit and it works great. nice fabrication work.

[mantis]

I would look on ls1tech.com or corvette forums in the for sale/ wanted sections to buy the engine and transmission.

[dillards1234]

another issue with the 2JZ is that it hangs over over the front wheels and causes it to handel worse, the LSX V8's are only 4 cylinders long and fit in extremly well, I have been gone for a long time doing this swap in my 91 or 92 S13 coupe and it only took me about a week to get the motor mounted and mounts made but I also only spent like 3k on the swap sofar and I just need a drive shaft and exhaust made and it is done. I would take pics but I have no camera cause mine broke...

[RCA]

another issue with the 2JZ is that it hangs over over the front wheels and causes it to handel worse, the LSX V8's are only 4 cylinders long and fit in extremly well,

I dont like how far forward the JZ seires engines sit in the S chassis either.But no one has done any "handleing" tests on their JZ powered S13/14 so I cant say that it handles poorly. But I assume its handleing characteristics are hevily affected by the swap.

On another note I havent seen any data on the LSx in the S chassis handling ability. Again i would assume that it does handle better then the I-6 cast iron JZ.Also when reading articles about "tuner car" showdowns I see LSx powered Z32s and LSx powered RX-7s and they never stack up.There power numbers are usually better then there competition but their times are horrible!I havent seen one Hybrid LSx powered car place out of the bottom 3.

I tried looking up the links to the 2 articles I am talking about but I couldnt find it.

SORRY ABOUT THE SPELLING