Fuel efficiency improvements

[SunlitComet]

Some people here use the Lincoln Mmark VIII fan in there trucks and easy to get from a junk yard probably. Don't use a different spider as you may not find a better and cheaper. Delphi has it OEM hands on almost every car out there. The delphi/acdelco brand will run you $450 at most local stores so that is a $200 savings already. If using stock ignition the ac-delco platinum 41-993. if full msd ignition setup the autolite 605 gap at .060. WHen it comes to parts or upgrades get your part numbers together and shop amazon or rock auto first then branch off into jegs or summit before going local.

 

[Firstoneman]

Some people here use the Lincoln Mmark XIII fan in there trucks and easy to get from a junk yard probably. Don't use a different spider as you may not find a better and cheaper. Delphi has it OEM hands on almost every car out there. The delphi/acdelco brand will run you $450 at most local stores so that is a $200 savings already. If using stock ignition the ac-delco platinum 41-993. if full msd ignition setup the autolite 605 gap at .060. WHen it comes to parts or upgrades get your part numbers together and shop amazon or rock auto first then branch off into jegs or summit before going local.

So, will the spider help with better mpg as a rule? Or is it just a power performance gain? I've never explored this kind of mod before. Again, keeping in mind my primary interest is better mpg, is there any validity to just doing the complete msd ignition mods? if I decide to be into this vehicle for the long haul, the sooner I put these mods on the sooner they each pay for themselves (if better mpg is to be had).
Thanks and I'll be keeping your suggestions handy.
Dave
PS. Did you mean Mark VIII (8)? Thanks.

 

[SunlitComet]

sometimes. It is more of problem waiting to screw up your day. It really depends on the condition of the old design. The old design had problems with working properly so much that gm extended the warranty of fuel injectors to 10yrs./200,000miles. the injector have improved fuel atomization. With a whole msd system you will get a more complete burn and of course more out of each drop of atomized fuel. Intake work would increase the flow properties of getting the mixture into the cylinders.

I meant 8. corrected.

---------- Post added at 11:29 PM ---------- Previous post was at 11:28 PM ----------

Of course you driving habits help a lot too.

 

[Firstoneman]

sometimes. It is more of problem waiting to screw up your day. It really depends on the condition of the old design. The old design had problems with working properly so much that gm extended the warranty of fuel injectors to 10yrs./200,000miles. the injector have improved fuel atomization.

Sorry, but I'm not following you. Is a new spider the thing that's waiting to screw up your day, or the original factory GM design?
So, how do I know if original is bad or if it's working properly? Are you saying GM's injector warranty solution has "improved fuel atomization"?

With a whole msd system you will get a more complete burn and of course more out of each drop of atomized fuel. Intake work would increase the flow properties of getting the mixture into the cylinders.

What suggestions do you have for the intake?

Thanks.
D

 

[SunlitComet]

Sorry about that. old design is bad design and sometimes give the impression something else is wrong other then itself. newer design is better. It can be hard tell if they are causing a problem unless you can actually see the flow so if you have 100,000+ miles on them then just chuck them for the new design. some problems are leaking, clogging, bad spray patterns or pressure regulator failure/leaking. Reading spark plugs can clue you in a little on there condition.

For intake you can go K&N FIPK $230 9+ hp, vmax spacer $220 20+hp and a ported TB $100-300 gain varies. And the gains listed here are what the makers claim on dyno sheets. I have the FIPK, want to do TB soon but may have to wait till I get a taller hood for the plenum intake spacer because my intake tube is already touching hood a tad bit

 

[Firstoneman]

Sorry about that. old design is bad design and sometimes give the impression something else is wrong other then itself. newer design is better. It can be hard tell if they are causing a problem unless you can actually see the flow so if you have 100,000+ miles on them then just chuck them for the new design. some problems are leaking, clogging, bad spray patterns or pressure regulator failure/leaking. Reading spark plugs can clue you in a little on there condition.

Thanks for the clarification. Will wait on that mod for a bit til I know the vehicle better. This Tahoe was good deal = free.

For intake you can go K&N FIPK $230 9+ hp, vmax spacer $220 20+hp and a ported TB $100-300 gain varies. And the gains listed here are what the makers claim on dyno sheets. I have the FIPK, want to do TB soon but may have to wait till I get a taller hood for the plenum intake spacer because my intake tube is already touching hood a tad bit

With all that HP gain (even if I netted a quarter of it) - will I lose mpg? Thanks for all this info. It will definitely be helpful.

Cheers!
Dave

PS. Am looking for a manual. Found a set of 4 $100+. Also finding dvds on auction site - $30+. What do you think?

 

[SunlitComet]

The general belief is that if those improve hp then it does not take as much gas to get the same power output and vehicle speed. I don't think there is a specific documented case or study but I am sure it does maintain or improve things on a mileage point of view to a certain extent. One day I intend to have everything from intake to exhaust done. including some new rocker arms.

As far as manual goes I use a web based system which contains the factory data for coverage from Tahoe, Blazer, Yukon, Escalalade 1992-2000 carryovers. And a 2005 ford escape for the mothers car. Printed is good but take care of them. Do you have a link for dvd type?

 

[Firstoneman]

The general belief is that if those improve hp then it does not take as much gas to get the same power output and vehicle speed. I don't think there is a specific documented case or study but I am sure it does maintain or improve things on a mileage point of view to a certain extent. One day I intend to have everything from intake to exhaust done. including some new rocker arms.

I kinda figured that but thought I'd ask. I am certain that air to exhaust tip can help mpg- my mods on my integra have proved that - and it definitely helped seat-of-the-pants experience from the very lackluster auto tranny.

As far as manual goes I use a web based system which contains the factory data for coverage from Tahoe, Blazer, Yukon, Escalalade 1992-2000 carryovers. And a 2005 ford escape for the mothers car. Printed is good but take care of them. Do you have a link for dvd type?

here's the link: http://cgi.ebay.com/ebaymotors/ws/e...item=&sspagename=STRK:MEWAX:IT#ht_8539wt_1173

Thanks again.
Dave

 

[SunlitComet]

Would not touch it. To many selling points on a long page should caution anyone looking. It is cobbled together from different sources. BTW GM uses Alldata because the data on there is from Gm's own data. And Alldata automatically applies service updates.

 

[Firstoneman]

The general belief is that if those improve hp then it does not take as much gas to get the same power output and vehicle speed. I don't think there is a specific documented case or study but I am sure it does maintain or improve things on a mileage point of view to a certain extent. One day I intend to have everything from intake to exhaust done. including some new rocker arms.

I've always suspected that is why the Toyota Landcruisers with diesels get such great gas mileage. Hmmm...what happens if I put a diesel in the Tahoe, change the gearing, and add skinny tires?

As far as manual goes I use a web based system which contains the factory data for coverage from Tahoe, Blazer, Yukon, Escalalade 1992-2000 carryovers. And a 2005 ford escape for the mothers car. Printed is good but take care of them. Do you have a link for dvd type?

What are you using and is it available to me for reasonable price? I suppose if I put a diesel in me Tahoe, there'd be no manual for it.

I do like the Tahoe style - both OBS and Second iteration (what are the initials for 2000+ Tahoes body style around this forum?). Not sure about third gen (is that NNBS?). So if I can find a way to justify keeping this long term I WANT to do it. But mpg is a stickin point for me. It will probably end up being the replacement for my '91 1/2 ton and '96 Explorer. Between those two I cover everything I need. I'd like to think the Tahoe will fill both duties well. So maybe I go with a diesel conversion. A friend of mine loves cummins and knows them inside out. He might be able to help me find one for a good price - the deals he scrounges up are amazing. Okay, sorry I digress.

Thanks &
Dave