Competition so....street turbo?

[Diesel Freak]

Kinda funny that II is on the K31 bandwagon like they are... ... when the info on the K31 was leaked from the Seattle Public Works Department!!!!



The PDR told II about it!!!



How lame!!

 

[idahogn]

i know far more about gas engine turbo setups than diesel ... ... . i just bought my dodge to pull the worls fastest gmc syclone... ... . 1500 hp twin turbo sbc... ... ... im also a turbo dealer for precision,and innovative turbo, as well as nitrous systems progressive methenol (not the snow preformance crap) propain injection ect ect ect and all of this stuff is the same principal as gas ... ... . but to find the optimal stuff you have to experiment ..... how many of you use an air fuel guage on your truck? this tool is just as important as egt fuel pressure ect when looking for top preformance from your combo. but i dont see it listed ... ..... and it seems like some on here are super secretive ... ... . like its the combo to fort knox or somthing ... ..... i do lots of reading but not much posting unless i have somthing to add ..... it also bums me out that this site dosent do a area for new owners like proven recipies for mild to wild trucks or things that the new owner should address when buying a certian truck... ... i have a third gen 03 ho manual truck ... ... what should i do in what order to gain the most reliabillity and performance... ... from free mods to 10k mods where did dodge or cummins not address problems ... ... . searching and searching i found lots of info only to find out it didnt apply to my motor or truck.

 

[Diesel Freak]

how many of you use an air fuel guage on your truck? this tool is just as important as egt fuel pressure ect when looking for top preformance from your combo.

As far as I can tell, only one Company has ever sniffed the exhaust to get A/F mixture. That Company was BD when they were developing their twin turbo system.



A/F ratio as you know is important!! Even in the land of Oil Burners... it's just that our optimal A/F ratio is over 20:1 compared to the usual 12. 5:1 on a strong running and reliable turbo gasser.



Maybe Christian Roth will chime in here!!!

 

[CRoth - BD-Power]

As far as I can tell, only one Company has ever sniffed the exhaust to get A/F mixture. That Company was BD when they were developing their twin turbo system.



A/F ratio as you know is important!! Even in the land of Oil Burners... it's just that our optimal A/F ratio is over 20:1 compared to the usual 12. 5:1 on a strong running and reliable turbo gasser.



Maybe Christian Roth will chime in here!!!

If anyone wants a A/F meter, Innovate Motorsports makes one.



I made up this little graph to help people understand A/F ratio and Diesels. Let me what you think, it is not the rule by any means but it helps when tuning and sizing for different turbo chargers.



We try to tune at 25:1.

 

[bluthndr]

Super dumb question - but what do I need to figure my air flow in lbs/min. I realize RPM, PSI, CID, but what's the equation (I know I should know this!).



BTW - this is maybe the best thread I have ever seen here (compressor maps, air fuel discussion, etc... ) I bet others know about air/fuel (or air/fuel/water/meth) but aren't saying... This is the first time I've given it a thought myself - I just wrote it off as too wide a band for a gas O2 sensor to read and gave up on the idea.

 

[RCenters]

chew on this http://www.rbracing-rsr.com/turbotech.html



this too Here are some quick safe calculation references to help you choose a turbo that suits your needs.



BHP= 10. 86X (lbs/min of air)

(lbs/min of air)/. 069=CFM



THX for the info BD was wondering what the area for the a/f ratio was , have to hook it up and tune some



The 72 wouldnt b to good as a single u would need a 58 a/r to spool it then if it does yr egts will sky and surge especially sence theres no surge limit housing with them , unless u get the new precision housing still usen garrett style wheels for the turbine witch only has 10 blades compared to 12 u c on the diesel,,and backpressure would sky , i had a 1to1 BP on my T70 with a 81 a/r and it would only make 32lbs and light around 2000+ i might get by with the 68 ... .



the 70 72 and 76 all basic TV series turbo from big CI diesels just add yr favorite TO4 series turbine wheel



I know precision has the GTS wheel but its just the GT series garrett or as close to it as u can get

 

[Centeno1]

Wow

Now That Is Better. That Is Info A Guy Wants To Know..... i Really Appreciate It. I'd Love To Just Show Up At A Shop In Central California And Have A Guy To Talk To That Had Info Like That I Bet I Would Have Him Fielding Questions For Hours If Hed Do It. Man ... . so Much Awesome Stuff To Learn So Little Time :d

 

[Diesel Freak]

a little more to wet your whistle



http://www.nwbombers.com/membersites/diesel_freak/conversions.xls



#ad

 

[GWBourne]

Seems like some peoplejsut don`t get it!! Diesel turbos for diesels and gasser turbos for gassers. It is not, one fits all. !!

tell that to the ricer crowd who seeks out stock turbos off of Cummins and puts them on thier cars. they even sell manifolds SPECIFICLY for this... .



oh, as for the thread... ill get back on topic.

i have no ral input on this. sorry.

 

[idahogn]

If anyone wants a A/F meter, Innovate Motorsports makes one.

and if anyone needs a deal from innovate i can get you that !!!!!!!!!

 

[Diesel Freak]

tell that to the ricer crowd who seeks out stock turbos off of Cummins and puts them on thier cars. they even sell manifolds SPECIFICLY for this... .



oh, as for the thread... ill get back on topic.

i have no ral input on this. sorry.

Yep, take a stock HY off a 3rd gen, slap it on a little honda rice burner, make a few other changes to support it, and woo hoo 500 HP!!

 

[CRoth - BD-Power]

chew on this http://www.rbracing-rsr.com/turbotech.html



this too Here are some quick safe calculation references to help you choose a turbo that suits your needs.



BHP= 10. 86X (lbs/min of air)

(lbs/min of air)/. 069=CFM

Keep in mind a diesel engine needs about 30% more air for the same HP as a gasoline engine.

 

[Centeno1]

dumb ?

ok this is helping but how do you know the vertical axis number of the map?the other axis is easy to figure... . wel from what i understand if your shoooting for a certain hp rating you need to find a turbo that will provide the cfm rating necessary but what the other factor is i dont know and havent read

 

[RCenters]

http://www.forcedinductions.com/helpadvanced.htm

http://www.forcedinductions.com/help.htm



dunno if that will help but if u like to read about turbos its good

 

[Centeno1]

ok tell me if this makes sense

ok so i know i suck at math but at 3500 rpms and 45 psi i would have a pr. of 3. 36 and 75 lbs min. right?



so when i look at the maps im always on the right fringe of them unless their big turbos



also how does the ar factor into the map or does it?



the page you linked helped me understand what the ar means but now im wondering what ar would be optimal or is that where the testing comes in?

 

[Diesel Freak]

you can only use Pressure Ratio in the place of Density Ratio IF you have 100% density recovery from your intercooler

 

[Centeno1]

huh..... really?

man everytime i think im getting the hang of this you guys throw out a new thing. its like you play with me bit by bit :-laf anyways it s my stock intercooler what i had figured is @3,500rpm&45 psi. =3. 36pr & 75 lb. /min.



which means a t70 or a gt42 in the world of garrett or who knows with holset since they are stingy with their maps



if im way off guys drop me some hints cause im thinkin i have a basic grasp. . i realize that according to the compressor maps those turbos arent optimal but for garrett it would be the best of what they offer..... right?



ok so this is fun so far

 

[bluthndr]

Didn't Holset publish the Super 40 and pro 52 maps? Anyone got a link to those above mentioned import sites that have maps posted?

 

[Diesel Freak]

The Holset info that was in the TDR magazine is useless!!



http://honda-tech.com/zerothread?&id=1225182&postid=20642509#20642509



warning, it's over 35 pages long now!!



A t-70 and a GT42 wouls suck as a single on a daily driver that gets used as a truck, but if you want to build a puller that meets the 2. 8 rule, both will work... just need to get the turbine and housings right. Since they are available with a T-4 flange, you can get a Manifold from ATS that will allow them to bolt right up. They will need a wastegate!!

 

[CRoth - BD-Power]

man everytime i think im getting the hang of this you guys throw out a new thing. its like you play with me bit by bit :-laf anyways it s my stock intercooler what i had figured is @3,500rpm&45 psi. =3. 36pr & 75 lb. /min.



which means a t70 or a gt42 in the world of garrett or who knows with holset since they are stingy with their maps



if im way off guys drop me some hints cause im thinkin i have a basic grasp. . i realize that according to the compressor maps those turbos arent optimal but for garrett it would be the best of what they offer..... right?



ok so this is fun so far

Don't forget about the volumetric efficiency of your engine, and the pressure drop through the intercooler.



As for the A/F ratio map, look at your desired HP, then choose your A/F ratio (25 is a good mid point, anything below 20 you may run into EGT problems) that you want to run. Line that up with the X axis and that is how much your turbo needs to flow if your system is 100% efficient.