40 mpg trans am
07-10-2011, 03:44 PM
#21
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Car gutted..(no interior, possibly sitting on a milkcrate,no radio, heater, etc.)
M6 w/3.23 or 3.42. Light rims, tall and narrow tires (less rolling resistance)
DOD or active fuel management on a stock 4.8 with efficient exhaust
A 150 shot of juice to meet your power requirement without all the added
weight of 2 turbos. If you were 2800 lbs with you in it, maybe on a windless
day and smooth road you could achieve your 40 mpg. You definitely have
your work cut out for ya with those two goals in mind.
M6 w/3.23 or 3.42. Light rims, tall and narrow tires (less rolling resistance)
DOD or active fuel management on a stock 4.8 with efficient exhaust
A 150 shot of juice to meet your power requirement without all the added
weight of 2 turbos. If you were 2800 lbs with you in it, maybe on a windless
day and smooth road you could achieve your 40 mpg. You definitely have
your work cut out for ya with those two goals in mind.
hyper mileing will help.
i will pass this on to a friend who is wokring on a build (geo) that is to get 100mpg city.
07-10-2011, 05:17 PM
#23
If those are your goals I would think you would have a better shot if you dropped a LS1 in a Rx7 or 240sx since they are a lighter platform to start with and just do basic bolt on's and some weight reduction on that. But I would not realistically expect 450HP and 40 MPG, I mean most new cars now a days don't get 40. I would think a more realistic goal would be 30-35.
Also the way a M6 LS1 is setup at most highway speeds your turning 1200-1400 RPM, so I would be caution about putting in a lower gear because if you lower if too much you could make 6th gear unusable at highway speeds
Also the way a M6 LS1 is setup at most highway speeds your turning 1200-1400 RPM, so I would be caution about putting in a lower gear because if you lower if too much you could make 6th gear unusable at highway speeds
07-10-2011, 10:11 PM
#26
It's quite a goal, but if the reason is to "save money", it's all wrong. If you're worried about insurance for a cheap, economical car, then I don't understand why you're not batting an eye at a twin-turbo setup with 800 lbs of weight reduction (with interior)....the FI setup and materials you'd have to buy, along with the time stuck into the build, will most likely come out to the same as a good DD + years of insurance payments.
Maybe you can maximize fuel economy....a good tune, stock gearing, an M6, light weight wheels/tires, ditching any extra weight, maybe even lowering, etc. will get you good results (along with good maintanence and a light foot <---- most important), but 40 mpg along with 450 hp is a very lofty goal while keeping within some sort of budget.
Maybe you can maximize fuel economy....a good tune, stock gearing, an M6, light weight wheels/tires, ditching any extra weight, maybe even lowering, etc. will get you good results (along with good maintanence and a light foot <---- most important), but 40 mpg along with 450 hp is a very lofty goal while keeping within some sort of budget.
07-11-2011, 11:41 PM
#27
look at a gear vendor over drive with the tallest gear and tire.I feel you can't do it with wanting 40 mpg ,unless you shed 1000+ lb.you will need the right cam with lots of VE.maybe talk to a nasa guy,alot of them are looking for work right now.
07-12-2011, 03:06 PM
#29
I believe he supper heated the air intake charge
07-12-2011, 03:23 PM
#30
I wanna know the possibility of making a 450+ horsepower trans am that also allows 40 miles per gallon. By my calculations, I can remove 800 pounds from the car itself by using lighter materials and other techniques as well as adding twin turbos with an active turbo/fuel management system. Is this possible or do I run the risk of hurting the motor by using lower compression ratios?
Forced induction costs a lot of money. A twin turbo setup will easily be $10,000. Turbos also add weight back into the car (turbo + piping + intercooler). Taking 800lbs out of the car is making it a gutted-to-the-max rattle trap. You will have nothing in your car but your seat, not too mention the lexan windows you'll have all around.
If you bought these cars for fuel economy, you're an idiot. They get good mpg for what they are, but not good in the grand scheme of things. Buy a beater like a Honda or if you want close to 50mpg, a Metro or Festiva.
PS-whoever mentioned the diesel swap, someone on this site did that in an old Polo Green 93-97 V6 Camaro. I think he got 40+.
07-12-2011, 03:24 PM
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07-12-2011, 04:06 PM
#32
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Wow. Well first let me thank all of you for the amount of interest in this. Or for some, a response at least.
To help clear the air a little, I Am basically going for the most fuel efficient 450hp T/a. I plan on spending around 15-$20,000 on mods to help accomplish this goal. The goal being 40mpg at 450hp. Im quite aware that it seems impossible or at least improbable but I've beat the odds before. Im in college as a mechanical engineer and playing baseball so we'll see how quick this will all happen.
As for the superheating of fuel, I've never heard if that one butif you guys could find some more helpful info, id be grateful.
As for now, im looking at carbon fiber hood, carbon fiber driveshaft going into a Moser Or Strange Rear-end with 35 splines. (More or less?) Gearing will be set at 4.10 for now but im looking for different ratios. Fast intake manifold etc.
Ideas for buildlist?
To help clear the air a little, I Am basically going for the most fuel efficient 450hp T/a. I plan on spending around 15-$20,000 on mods to help accomplish this goal. The goal being 40mpg at 450hp. Im quite aware that it seems impossible or at least improbable but I've beat the odds before. Im in college as a mechanical engineer and playing baseball so we'll see how quick this will all happen.
As for the superheating of fuel, I've never heard if that one butif you guys could find some more helpful info, id be grateful.
As for now, im looking at carbon fiber hood, carbon fiber driveshaft going into a Moser Or Strange Rear-end with 35 splines. (More or less?) Gearing will be set at 4.10 for now but im looking for different ratios. Fast intake manifold etc.
Ideas for buildlist?
07-12-2011, 04:12 PM
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Also, it will be an M6 and im not looking for a daily driver to go with it. I have a 95 camaro and a1993 gsxr 1100 to drive if I need to.
Again, im doing this to prove it can be done. And vettes are expensive And kinda flimsy, no offense to anyone. Just personal experience
Again, im doing this to prove it can be done. And vettes are expensive And kinda flimsy, no offense to anyone. Just personal experience
07-12-2011, 07:04 PM
#38
$15-20k in mods for 450 hp/40 mpg seems like a waste....you could spend $5 on mods and get 450 hp, then buy a nice daily for the extra left over (selling your '95 would add more money to that).
It would be a fun experiment, as well as being expensive and time consuming, but I honestly don't think it's worth it. Adding that Moser will just add weight and sap at your power that's delivered to the wheels, so for optimal efficiency you'd want the good old 10 bolt.
Honestly, it's a lot of money that could be used for better purposes IMO.
It would be a fun experiment, as well as being expensive and time consuming, but I honestly don't think it's worth it. Adding that Moser will just add weight and sap at your power that's delivered to the wheels, so for optimal efficiency you'd want the good old 10 bolt.
Honestly, it's a lot of money that could be used for better purposes IMO.
07-12-2011, 10:07 PM
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A beefy rear is a big mistake if the goal is MPG. Bigger, more heavy duty parts like that will drain power and add weight, both of which will work against your goal.
Frankly, if you plan to pull 800lbs off the car, the stock 10 bolt will probably last a while anyway.