whats up? i'm planning for 300 whp or maybe even 325 ish. i have 450cc dsm injectors and will also be running methanol injection. Snow performance with the green nozzle i believe. 300-350 horse. i know the injector size calculation, but not with the methanol injection...injection will be before the throttle body in the intake charge piping.
Thank You.


Modified by 95dxsir2 at 12:27 PM 5/22/2008

 

are you talking about e85 or methanol?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91civicDXdude &raquo;</TD></TR><TR><TD CLASS="quote">are you talking about e85 or methanol?</TD></TR></TABLE>

That would be nice to know

 

sorry guys, i meant methanol, i was getting brain [freak]ed @ the moment


what would you guys recommend...e85 or methanol injected through the pipe?


Modified by 95dxsir2 at 12:33 PM 5/22/2008

 

like i was told it never hurt to go big if you can turn it down.. Get some rc 1000cc injector and you should be fine!! My car idles great

 

For some reason I thought it was a little richer than ethanol. I've seen a chart before regarding widebands, but I just can't remember where...sorry.

Edit: found it. http://www.smokemup.com/tech/fuels.php

According to that, the injectors should be ~2.46 larger to maintain the same stoimetric value as gasoline. Since it shows meth produces ~27% more power for the same amount of air, that means 1000cc injectors would probably be needed to make 350whp (100% duty cycle). I'd get 1200cc or 1600cc injectors minimum...


Modified by HiProfile at 2:45 PM 5/22/2008

 

are u serious, 1200 to 1600cc
even with the injection going into the intake manifold seperate from the fuel injectors?

 

 

Just run the injector size that you figured would work, then run the methanol injection and tune the richness out of your normal injectors to make up for the methanol injection.

 

exactly

 

On an H22 I ran 700cc injectors with Methanol injection at the throttle body. Made about 320whp @ 10 psi with a GT30. Still had lots of room left on duty cycle.
460whp @ 17psi and still not maxed out.

 

Bringing this back from the dead. I have a built D16 with 800cc injectors and made 308whp on 93 octane conservatively tuned. If I were to switch to e85, would 800cc injectors carry me very much further?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PA MATT &raquo;</TD></TR><TR><TD CLASS="quote">Bringing this back from the dead. I have a built D16 with 800cc injectors and made 308whp on 93 octane conservatively tuned. If I were to switch to e85, would 800cc injectors carry me very much further?</TD></TR></TABLE>

They would support roughly as much power as 550's would on gasoline. I'm at ~320whp with 880's on corn juice and I have plenty of room to crank the boost up.

 

awesome, glad to hear. I have 880's haha. I mistyped when I said 800cc, but I'm sure you assumed that much. Would it really be worth it for me? From what I calculated, these should be good to about 372 assuming they will do 70% what they would on gasoline

 

Weve done quite a few cars on E85 and heres what we found on our dyno.

Single Walbro + 1000cc = 420-430hp
Dual Walbro + 1000cc = 520-530hp
Dual walbro + 1600cc = 630-640hp

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fullblown &raquo;</TD></TR><TR><TD CLASS="quote">Weve done quite a few cars on E85 and heres what we found on our dyno.

Single Walbro + 1000cc = 420-430hp
Dual Walbro + 1000cc = 520-530hp
Dual walbro + 1600cc = 630-640hp</TD></TR></TABLE>

Good info. Looks like I need to swap to a dual walbro setup soon.