20 PSI on SOHC Daily Driven
 

I am looking for people that are running large amounts of boost on there SOHC and I am wanting to just find out what they are running and just get a feel of what I am lacking to buy and what to watch out for. Currently I have a Z6 block that I am throwing the Darton Permormance Sleeves in. I have a set of Stock Comp JE SRP Pistons and Eagle H Beam rods. I have a Y8 head that is being P&P and getting a 5 angle valve job. I will be running Uber WOOT WOOT. I have a T3 turbo, Greddy Mani converted to T3 flange, Greddy BOV, Greddy MBC, Spearco FMIC, Tial Wastegate, and a few other things that I can't remember. One thing that I am still needing are injectors. I just wanna see what everyone is runnin. Also I am gonna run a walboro 255 with a good FPR. I am just wanting a little feedback from everyone that has done something like this. Anything I should do different. I know it is only a T3 but will upgrade later. Also if anyone has a map form Uber running this much boost I would GREATLY appreciate it to give me something to compare to. I have a 96 coupe if you were wondering. But any input is greatly appreciated.

Re:20 PSI on SOHC Daily Driven
 

Well we eould need more info on the specs of the turbo to find out what kind of hp levels you will be at @20psi.

A 60trim straight t3 will usually push out 300whp at around those numbers so i would say youd be at 55-65% duty cycle with some 550s and youd be good after you upgrade turbos till about 360whp. Then its time for some 710cc supra inhectors.

Good Luck.

efM0B

Re:20 PSI on SOHC Daily Driven
 

I run 21 psi on my stock d15b2 daily, buy my book or something. this thread ------- sucks. at 20psi on a t3 you're going to be falling off of the efficiency range, you better have a good fmic to cool down all that hot air. It's been posted on here before, 450s are good to 360hp at 90% duty cycle on 42psi or so of fuel pressure. at 20psi you should easily be knocking on 400hp's door, if not just knocking and blowing ---- up.

Re:20 PSI on SOHC Daily Driven
 

Kyle, that post is exactly what I wanted to hear. People have been ------- telling me my 450's wont cut 300whp (honda-tech puss bags), and I know I can get even more out of it by upping the fuel pressure. Have a link?

Re:20 PSI on SOHC Daily Driven
 

Ok, go ahead and push the injectors. Any person in there right mind wouldnt push any injector over 90% duty cycle, the pulsewidths become inconsistent around that figure and it just creates inconsistencys in the fuel spray. upping the fuel pressure (to a certain extent) again, just creates inconsistent fueling if you just up the fuel pressure to try and fix it. It will just worsen the situation.

And you wont be falling out of the efficiency of the .63ex ar 60 trim t3 which was the turbo i was refering to. You will be right around its limits yes but you wont be blowing pure hot air. You want more backup on that, contact Jeff @ Evanstuning.com and get schooled my young grasshopper. Heres the link: http://evans-tuning.com/viewtopic.php?t=1540

Also, why would you post something if you wanted to hear a certain response, that pretty much defeats the whole purpose of posting. And furthermore, this car will be daily driven? Good luck with a 90% duty cycle, if it were me id look for a set of s4 rx7 tII injectors (550s) which you cant get for maybe $30 more that dsm 450s. IF you want a set lmk, i have like 3 sets.

This is what it boils down to:

Can you get 300whp out of 450s? yes
IS it pushing the injector? yes
Can you find 550s for the sme price or $20-30 more? yes

So why not just upgrade. Jesus, youve spent an arm and a leg on the internal build, i hope you know that doenst make the motor invincible.

Re:20 PSI on SOHC Daily Driven
 

I have had my eye on some 550's from stealh mode and RC but I have heard that those may not be enough. I keep getting different responses. That was the reason for me posting this so I can get a multitude of responses and see what has worked for everyone so that I can make a decision as to what I need to buy. I am eventually going to upgrade to a T3/T4 so I am leaning more towards the larger injectors up in the 700's. Is this over kill for 400 HP and a 50 shot. I am not trying to stir up controversy I am just wanting some opinions so that I can decide which way that I need to go.

Re:20 PSI on SOHC Daily Driven
 

450's are over 100% duty cycle at about 330 whp, where you getting these numbers from kyle?

Re:20 PSI on SOHC Daily Driven
 

http://www.evans-tuning.com/viewtopic.php?t=4

That will tell you everything you need to know.

Re:20 PSI on SOHC Daily Driven
 

i ran 16 lbs daily for a while

Re:20 PSI on SOHC Daily Driven
 

Josh, did you have ARP studs on your sohc?

Re:20 PSI on SOHC Daily Driven
 

I was running 17.5 psi on 450's and the hack for about 3 weeks. 8) At 17.5psi on a never ever tuned afc I hit 235hp/222tq. (Yeah me!!!)

Uh, then I must have had faulty pistons or something. 8)x10

Re:20 PSI on SOHC Daily Driven
 

hahah faulty pistons :P

Re:20 PSI on SOHC Daily Driven
 

I keep hearing stuff like I need 800 to 1000cc to do 20PSI plus a 50 shot but that seems like a little over kill. What is a good daily driven duty cycle to run at? I don't mind running them a little harder than normal but 100 or 90 is a little much. I would rather spend a little more money and get bigger or would 90% be safe for daily driven.

Re:20 PSI on SOHC Daily Driven
 

I read that 360 whp deal on here somewhere, I don't remember who said it and I don't have a link, but I'm 100% sure that I read it here. wtf is "pure hot air"? any air coming out of a turbo is going to be hotter than when it went in, it's physics, you can't argue with that. if you compress air it heats up, or the volume of the container changes, but we're not working with balloons so you get hot air. and you can contact jeff @ homemadeturbo.com about running 308 whp on 450cc injectors. I never said to push an injector of 90% duty cycle, I said @ 90%, not over. why would you post something if you wanted to hear a certain response? to confirm what you thought you ------- moron. and there's nobody that I know of that's running 20psi on a d-block daily, so I don't know how anyone could expect to hear what everyone's running as if it were a common everyday occurance.

Re:20 PSI on SOHC Daily Driven
 

Well supreme at turbod16.com runs 20psi and makes about 310hp. Im going to tune this summer for 20psi ill let you know then ;) I run cp pistion 20. over 9:1, eagel rods, acl bearings, oem headgasket on stock sleeves. I use a stock head and arp headstuds. I run a t3 60/63. with ubderdata, right now im at 10psi cant work out my 3bar yet and this shitty weather dont help.

Re:20 PSI on SOHC Daily Driven
 

OMFG. click my goddamn link. It tells you exactly what is needed for certain ranges of horspower. wtf.


Quote Jeff owner of EvansTuning

"The following is guide for selecting fuel injectors corresponding to horsepower and stock fuel pressure (40psi at the fuel rail). The sizes were estimated using 90% duty cycle of the injector. The sizing of the injector is heavily dependant upon the air/fuel level the engine is tuned at (ex. 12:1 air/fuel will take more cc's than 12.5:1 air/fuel) :

310cc 200~220whp
370cc 220~280whp
440cc 280~330whp
550cc 330whp~380whp
660cc 380whp~425whp
720cc 425whp~475whp
880cc 475whp~525whp
980cc 525whp~600whp"

end quote.

Re:20 PSI on SOHC Daily Driven
 

yeah those estimates are rough though.

On 550s you should be able to make up to and over 400hp,
and 650s up ive seen suport 550-650hp.Ofcourse this is all tuned with widebands.

t3 to4b 50 trim 24psi on 550s running some 11.01@123 in a 3100 pound car so you do the math.

Re:20 PSI on SOHC Daily Driven
 

So youre saying for 100cc of injector your gonna be able to squeeze out 100-200hp?!?

youre crazy guy. Ill stick with Jeffs figures, hes tried and true and easily the east coasts best tuner. There are some others out there too but Jeff is just amazing.

No wonder DSMs break so much.

Re:20 PSI on SOHC Daily Driven
 

Ok "moron" what is the point of posting in a forum? It is to further gain more knowledge or to enlighten someone else with your knowledge. I am not trying to confirm what I am doing. I am trying to determin the next path that I need to take. I have seen alot of stuff on injectors and alot of controversy as to what to be used so I am trying to clear that up. So "moron" I am not going to " post something if you wanted to hear a certain response? to confirm what you thought you ------- moron". And there are quite a few people that have and do run 20 PSI daily on there D block so don't go assuming that since the almighty kyle does not know of someone that there are not any out there.

Re:20 PSI on SOHC Daily Driven
 

yeah i ran arp studs

Re:20 PSI on SOHC Daily Driven
 

1) the "point of posting" comment was directed towards W O T.

2) I am one person that did boost a d block 20 psi daily. Ask stealthmode, the pistons he melted and the rods in the same engine came out of my d16z6 setup.

3)You question has been answered. Email info@evanstuning.com if you need any more info. Or just visit the site www.evanstuning.com


Arps are good, i run head studs and the rod bolts in my ls.

Re:20 PSI on SOHC Daily Driven
 

just use this
http://www.rceng.com/technical.htm#WORKSHEET
if not contact rc engineering

Re:20 PSI on SOHC Daily Driven
 

pwnt

how many days?

Re:20 PSI on SOHC Daily Driven
 

I've been spiking to 14psi daily on a stock D15 running a fairly solid ~11:1 AFR(yes I know that's too rich). My old hatch is running 15psi daily on a stock D16Z6 on an uneducated basemap I made. Both running the same .48/.60 T3. :-*
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Re:20 PSI on SOHC Daily Driven
 

How many days?

1 whole summer. Parted it out to fund bseries projet.