MY_2K_Z

iTrader: (1)

Just curious why did you remove most of the tunes from your wiki tune cabinet?

svslow

Looks like most of them are still there.

MY_2K_Z

iTrader: (1)

Here's the list of what's been removed. About 20 tunes https://sites.google.com/site/sloppy.../recentChanges

denmah

iTrader: (2)

100 mb limit on the wiki page.

many similar ones taking up space

chub406

Hey Denmah,
How far from the turbo do you have the WBO2? Im running the holley and my down pipe is only going to be approx 14 inches. Im seeing alot of threads saying the o2 wont read correctly if too close to the turbo, due to the pressure and to close to the outlet because of pulling in fresh air on light and part throttle driving. Recommending 18 inches from the turbo and 12 inches from the outlet. Your DP is obviously super short and its a street truck, have you ran into any issues with this? Has it had any affect on when tuning the truck?

Forcefed86

iTrader: (4)

Crazy those pumps are drawing that many amps with almost no load on them.

Here is the amps VS pressure chart for the 450 pump below.




If you’re right around 50a now, at higher pressures the amp drow will only increase from where it is now. Also if your pumps alone are drawing 50a+ don’t you think the alternator is maxed out? If the alt can’t keep up, flow is gonna drop as the demand increases.

You could do a test and raise your base pressure with the clamp on it for us and see how much amperage is being pulled at say 65-75-85-95 psi. (with the car running so we get max voltage) Then you’d know how large of an alternator you need roughly.

Thanks for testing that! Surprising results.

aggie91

I might be off base here, but from the chart, if he is running at 50 psi, EACH pump is pulling 14.36 amps. So, 3 pumps would be a total of 43.08 amps thru the power wire at the relay...

stevieturbo

50psi base....not including boost reference.

All those pumps draw shitloads of current....and it's a continuous draw, not even short duration.

ShaunRF

This is one of the reasons e85 gives me such pause. Your fuel system capacity needs can really skyrocket once you start making power.

stevieturbo

Approx 30% over normal fuels.

A fair amount but not horrendous.

SethU

Without double checking the statement I'm about to make (I could be wrong), I think the 30% figure is based on weight and when the fuel density (weight per volume or pounds per gallon) is taken into account, it's closer to 50% more fuel, by volume, gallon for gallon.

I should double check that, just not feeling like it at the moment. Anyone else care to verify that?

laytoncamaroz28

iTrader: (10)

I agree^ especially if you have a full 85%+ ethanol content. Alota places pump e85 is like 70-80%. Here it's usually 85-90%, I've had as high as 92%. And it used ALOT of fuel. You could always delute it... But who would do that?! Ha.

ShaunRF

Based on what I've seen in this build and a lot of others, the actual number is higher than that by a decent margin. Its anecdotal of course, but it always seems like ethanol users are always needing more and more fuel system.

Hank Peabody

iTrader: (2)

Yeah probably closer to 40%. I put supposedly 41% bigger injectors in my turbo bike and went from gasoline to e85. I didn't touch the tune. It runs perfectly but it is a tenth or two points leaner on the gasoline scale. The e85 measured exactly 85% with the little Holley test tube thing.

Elledge12

In my req'd fuel setting on ms3 it was much closer to 50% then 30% when I made the switch from 92 to E85.

Totally worth the pump work and big injectors if its available in your area IMO. Pretty sure the large tuning window saved my first 2 motors from my sketchy at best tuning at the time. lol

Corner Worker

Agreed. Its a shitload cheaper than race fuel, $2.00/gal vs. $14/gal. Even at 100% the usage of fuel to make the same safe zone as the overly priced race fuel counterpart, its still a bargain. Availability, price, knock suppression, all adds up to a great alternative for a boosted street driven car. Track only monster, then I would go straight alcohol.

newschool72

iTrader: (12)

Denmah, this is my first text on your thread although I follow a lot of your work. To that I say U DUH MAN ! I have a question though, on the NOS steel line that blew. Do they make a rubber line that will stand up to 1000 psi of bottle pressure ?

roastin240

iTrader: (13)

ALOT of poeple would do that. E50 is a popular mixer of E85 and 93. Measure your local E85 content and then calculate how much of each to get to E50.

The Knock resistance of E50 is equal to that of E85 and will allow you to stretch your fuel systems capabilities a bit further.

The 2 tradeoffs to running the lower ethanol % is you realize less of the benefit from the O2% increase with ethanol as well as the Lower Heating Value (LHV) of ethanol. What this translates to is a very minor "chemical supercharging" affect with the added O2% and the LHV is the energy required to phase change the fuel liquid to a fuel vapor. That energy comes from the heat in the air charge (much more apparent on a direct injection engine but still occurs in port injection although a large portion of the heat is pulled into the fuel from the head and intake valve prior to entering the chamber). More heat absorbed = higher density charge (due to lower temperature at the same pressure - ideal gas law) entering the combustion chamber, and will ultimately lower EGT's more at the higher ethanol % mixtures than lower % mixtures.

All that being said, E50 has taken many people pretty far in the racing world. And you can hit the 50% mark every time based on testing at the pumps and mixing yourself to account for changes in ethanol % throughout the year and pump locations. This is assuming you dont have ethanol feedback and on the fly adjustment for AFR at the minimum.

stevieturbo

There is no rubber nitrous line.

Any nitrous line would be of a teflon nature.

That isnt to say there isnt runner based hose used in hydraulic systems that can easily cope with 1000psi....but I doubt anyone needs or wants huge diameter lines for nitrous in a car...unless it was maybe a 5000 shot lol

newschool72

iTrader: (12)

I didn't think there was. I'm just trying to understand what Denmah was going to do to eliminate the hard line on the spray when he said he was going with "rubber line". I assume he must have been talking about some sort of braid with machine crimped ends.