timer00

I recall reading/posting about MPG using this intake mod and that intake mod, and wanted to finally post some real world figures from a long vacation I just got back from. I drove approx about 1100+ miles round trip from eastern PA to as far south as Beaufort NC and back up. Stayed in Buxton NC for 8 days so there was so extra driving back and forth to towns.

I had the Jbrady mod with some basic aluminum heat shield and headlight seal removed, 93 octane, 2 full fuel fillups and another half tank of gas that my wife put in 89 octane (I was in the bathroom damn her ! hah)

Averaged it all together 25 tank one, 24 tank two, 26 tank 3 (half tank)
Probably 70/30 highway/rural driving. 75-80 on the interstates.

So yes its exciting to see 35-40 mpg on the highway in cruise control as I first thought but in the end on a real trip you still will only get 25-27mpg tops. I took the PA->DE->Bay Bridge Tunnel->VA Beach->Outer Banks (8 days)->Ferry to Ocracoke then to Cedar Island->Beaufort NC->Back up Route 17 through NC and back the same way on the Bay Bridge etc. I am sure some of you are familiar with the routes and how fast you can go in those areas typically.

I don't think I did too bad 25mpg averaged out.
Didn't have a chance to take pics but since I got home on that last half tank what is left I am down to 23 mpg since driving short distances to work down here lowers the mileage of 26 since I got back. Around here driving 1 mile back and forth to work and food shopping I get 20mpg avg consistently.

Just posting this as some FYI for those who want to compare.

Thanks

LiCelsior

iTrader: (32)

hmm i need myself a 2nd gen engine, i wish i had 20ish mpg. sounds like the mod did you some good.

timer00

Well I don't have baseline without mod to compare but either way I think its just fine. Engine is 69k miles and just had the drive belt changed because it was dry rotted and was causing a squeaking sound especially with the A/C on.. it doesn't do it now at all and is very quiet.

steveski

That is some good information from your long road trip. For the past 3 months I have averaged 23-24 MPG per tank driving to work. It is 80/20 highway/city with some Houston traffic. With over 190,000 miles I am very happy with these numbers. I have an airbox mod and can say now that if it increases mileage over stock it is such a small difference for me - under .5 MPG - but hey it sounds better though no doubt. For you since you have the vvti motor I am not surprised with hte better mileage.

CptnTonus

Man, you guys are lucky. I've been averaging 17mpg in my LS400 lately. The best I've seen is 20mpg from it.

sonyman

What kind of driving?

steveski

Good point - driving habits obviously are the key to mileage. Mine is mostly on the highway and I rarely exceed 75 MPH - If I drove agressive and fast on the highway I would get less than 20 for sure.

CptnTonus

I feel like I baby the car. I don't do a great deal of WOT pulls, the thing barely goes north of 4,000rpm. Lots of highway driving, probably 80% highway, 20% city. I'm very rarely sitting in traffic with the car. The car has been recently tuned-up, and I always run premium gas.

I guess when I'm on the freeway I tend to go a little fast. 80mph is pretty standard.

skperformance

iTrader: (6)

with 4 people and a/c i got 33mpg on straight highway

steveski

Phenomenal for a V8 pushing 300HP

Jasbmo

290, im working on adding another 10.

Jasbmo

I think a rear spoiler will do the trick!

sonyman

Technically, that will reduce your mileage ever so slightly...

PureDrifter

iTrader: (10)

LOL, c'mon, you KNOW he was messin'

my exhaust+intake SHOULD give me around 10hp but i never did before/after dyno.

sonyman

But of course.