why not cool with nitrous.. would work much better

 

Andy Forrest runs straight meth without intercooling on his 9sec STi type R w/ very good results.

 

also, when aiming the meth injectors, point them upstream. it will help atomization, you will get less "pooling" from it shooting straight across, and best of all, the longer the meth spends in the air before going into the cylinder, the higher the density of the air that will be in the cylinder.


you can have your doubts, but i've already proved its usefulness in a real world application.
CBR250cc 4 stroke engine. turbocharged with 10-12psi. 11.5:1 compression. no intercooler. 5 injectors running E-85. worked like a champ revving to 20,000 rpm.

here, see for yourself:
http://s2.photobucket.com/albums/y34...t=f06dyno1.flv
this is a video of the car on the dyno with the wastegate still set part open (5th injector was not being used in the video yet)

 

oh and i don't think champ cars use intercoolers. they are turbocharged V-8's running straight methanol... the methanol basically cools the air far more then any intercooler could...

 

Forward firing nozzle - towards throttle body

Backwards firing nozzle - towards intercooler

Swagelok 1/8NPT X 4mm feedthru




I need to redesign the injectant delivery system to compansate for the lack of IC, thinking how to squeeze 2 more axial mounted jets into the intake tract......2000cc/min of methanol

 

If it were me.....I'd use nitrous instead of meth. You could run less boost thus creating less heat. The temp drop from the N2O could be your chemical intercooling and you would still get **** loads of power.

Then again I think I would simply add nitrous to a system with a FMIC and call it a day.

 

Have you considered doing a direct port set-up? Seems like you are planning to spray an awful lot for doing it through the IC pipes.

Re: the nitrous suggestion, that would be really expen$ive!

 

what a different idea!

good luck with it!!!

 

Rich, that is the best idea! 4 X 1.0mm nozzle, one on each intake runner

 

one thing you might want to be careful of is even distribution of the fuel between the intake runners.

because such a large portion of your fuel is going to be the methanol, and sense all the methanol is being fired into the IC hoses rather then the actual runners themselves, i would be very careful about cylinder/cylinder fuel distribution.

one way to test this would be to run 4 EGT's, one in each exhaust runner... but thats just me. not to many inexpensive DAQ systems can log 4 egt's.

 

will it matter if methanol is injected on the turbo outlet end......or direct port injection on each intake runner?.......seems that towards the turbo outlet might be better....longer residence/contact time....better cooling?

its a pain drilling/tapping 4 egt bungs on the EM......i got a 500Hz aquisition rate 12 input type k thermocouple recorder

 

I was thinking the same thing, but why would you need 4 EGTs? If you are monitoring EGT in the cylinder farthest from the throttle body (the usual one to tap anyhow), then you are covered on the other 3 (at least from an IC-pipe meth injection stanpoint).

I would think, if anything, that with a direct port system you'd have to worry more about one random cylinder having a problem. I wonder how the DDS3 could cope with that? If one of four jets had a problem, would the flow sensor pick up that difference? The flow window would have to be pretty narrow.

 

well for arguments sake, we started with one intake manifold design on our race car. and after watching the EGT's we threw it away. the fuel was all going to the far end of the manifold, thus causing the last cylinder to run very very rich (EGT's were like 500* at WOT), while the first cylinder was extremely lean with EGT's over 1500* at WOT. total AFR was in our target area though... because the 4 cylinders exhaust was mixing. after redesigning the manifold (actually it was just injector placement), things leveled out. thats all R&D stuff though. but i would really recommend running the 4 EGT's.

 

Rich, when one of the 4 jets stop flowing, the flow will be reduced to 0.75. the DDS3 will pick it up