mpg gain from turbo install?
02-14-2010, 10:46 PM
#1
mpg gain from turbo install? Just wondering if anyone has a direct or good before/after results with installing a turbo and getting better mpg at light cruising speeds and city driving.
Looking at all the diesel trucks they get great mpg's but they all have turbo's, the earlier diesel trucks that didn't have a turbo got nearly half mpg's
Reason I ask is because I'm trying to get better mpg from my truck.
It is a 1988 dodge ram with a 440 in it, 2500 stall, 727 trans,full time np203 t-case, 3.90 gears, 31 x 12.50 tires, 4600lbs ,lifted 4 inches, carb 750 demon, stock truck cam with .420 lift, edelbroke aluminum heads, headers.
Now its gets 9.1 mpg in the city and on the highway. Considering the mods I didn't think that was horrible considering the mods and tranny not being OD
Some newer trucks get only 12-14 with an od tranny and a part time t-case with a smaller motor.
Engine has a ton of TQ and I'm thinking about a OD swap(looked into it should only cost $800 or so getting craigslist parts and doing labor myself)
A more stock stall of 2000 vs my 2500 may get 1 mpg, also the OD tranny should be good for 3mph on highway. and a newer t-case that is ligher and more efficient may help slightly so that may put me 10 city and 13 highway
LOL still not great but for $800 vs a new truck you cant even pay sales tax for that.
engine is 8.5 compression so I think I have two routes, up compression to 9.5 or 10:1 and getter better mpg from that or do the turbo if its been proven to get better mpgs with the right size turbo, setup, ETC.
Any info , tips, web sites, and opinions are open, besides selling the truck..LOL
http://www.youtube.com/watch?v=DInhf1I-BmM
I like the truck and I just want to improve it and make it better/ more efficient, LOL I know the burnout does not make it get better mpg. 9 mpg's is the best I can do driving it easy.
I was also wanting to maybe lower it just and inch all the way around for better areodynamics.
Looking at all the diesel trucks they get great mpg's but they all have turbo's, the earlier diesel trucks that didn't have a turbo got nearly half mpg's
Reason I ask is because I'm trying to get better mpg from my truck.
It is a 1988 dodge ram with a 440 in it, 2500 stall, 727 trans,full time np203 t-case, 3.90 gears, 31 x 12.50 tires, 4600lbs ,lifted 4 inches, carb 750 demon, stock truck cam with .420 lift, edelbroke aluminum heads, headers.
Now its gets 9.1 mpg in the city and on the highway. Considering the mods I didn't think that was horrible considering the mods and tranny not being OD
Some newer trucks get only 12-14 with an od tranny and a part time t-case with a smaller motor.
Engine has a ton of TQ and I'm thinking about a OD swap(looked into it should only cost $800 or so getting craigslist parts and doing labor myself)
A more stock stall of 2000 vs my 2500 may get 1 mpg, also the OD tranny should be good for 3mph on highway. and a newer t-case that is ligher and more efficient may help slightly so that may put me 10 city and 13 highway
LOL still not great but for $800 vs a new truck you cant even pay sales tax for that.
engine is 8.5 compression so I think I have two routes, up compression to 9.5 or 10:1 and getter better mpg from that or do the turbo if its been proven to get better mpgs with the right size turbo, setup, ETC.
Any info , tips, web sites, and opinions are open, besides selling the truck..LOL
http://www.youtube.com/watch?v=DInhf1I-BmM
I like the truck and I just want to improve it and make it better/ more efficient, LOL I know the burnout does not make it get better mpg. 9 mpg's is the best I can do driving it easy.
I was also wanting to maybe lower it just and inch all the way around for better areodynamics.
02-14-2010, 10:49 PM
#2
Also with my cam being a flat tappet .420 lift ? duration..stock from 1978 I wonder if a decent roller cam conversion with similar specs to a ls1 will get better mpg and power. With my ls2 camaro and tv.2 cam setup I went from 21mpg on the highway with an ls1 10.5 compression 224 227 .563 .569 lift cam to 22mpg on highway with the ls2 bigger motor 11.0 compression and bigger cam.
I hear alot of people gain mileage from a bigger cam, but not to big. may need to call comp on this one.
I hear alot of people gain mileage from a bigger cam, but not to big. may need to call comp on this one.
02-14-2010, 10:50 PM
#3
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The cost of the turbo will never offset any gas savings unless you drive your truck a **** ton of miles. Even then the extra maintenance cost will offset all of that. Not to mention at WOT, which you will do sometimes, it will guzzle fuel.
02-15-2010, 03:49 PM
#6
Tall order. Both of my 20 ft box work trucks get better than 9. Last tank in the Penske truck was over 12.
You look like you like to drive it, got some pride in it, why not.
I'd say F it and put a 24 valve junkyard cummins from a late 90's with an hx40. You'd get all the MPG's you're looking for and more power.
You look like you like to drive it, got some pride in it, why not.
I'd say F it and put a 24 valve junkyard cummins from a late 90's with an hx40. You'd get all the MPG's you're looking for and more power.
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02-15-2010, 04:58 PM
#8
**** off the MOPAR gods.
02-16-2010, 10:47 PM
#9
If it matters I swapped the brake booster from a 98 camaro onto it, stoops alot better and its lighter by 6lbs..LOL
Today I just got back from IL from buying a 700r4 and np208 case. There is my overdrive, maybe another 3-4 mpg. the 700r4 and np208 are nearly 200lbs ligher then my 727/np203. so yeah chevy tranny is going in the dodge!!
02-16-2010, 10:51 PM
#11
Tall order. Both of my 20 ft box work trucks get better than 9. Last tank in the Penske truck was over 12.
You look like you like to drive it, got some pride in it, why not.
I'd say F it and put a 24 valve junkyard cummins from a late 90's with an hx40. You'd get all the MPG's you're looking for and more power.
You look like you like to drive it, got some pride in it, why not.
I'd say F it and put a 24 valve junkyard cummins from a late 90's with an hx40. You'd get all the MPG's you're looking for and more power.
I thought about the cummins swap, but there is are two big downfalls, One they sound like ****, just like vipers, and secondly I hate all the black smoke.
Your work trucks most likely have an od tranny and a turbo, scrap both of those and your down to where I'm at.
02-18-2010, 11:58 PM
#12
http://tiresmoke.iwarp.com/700R4%20i...%20Duster.html
Nice, gained 5mpgs from going to a gm tranny, aparently the 727 is a hp robber, I have the 700r4 and np208, as soon as my adaptor plate comes in I will begine the swap and may do a write up on it as well. Looks like I should gain 4-5 mpg's
Nice, gained 5mpgs from going to a gm tranny, aparently the 727 is a hp robber, I have the 700r4 and np208, as soon as my adaptor plate comes in I will begine the swap and may do a write up on it as well. Looks like I should gain 4-5 mpg's
05-26-2011, 12:58 PM
#17
05-26-2011, 01:37 PM
#19