gAS or EFI?????

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Anonymous

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heres My dillema. i like gas.
ive got a ohc six;
custom manifolds
big to4 ext wastegate
good cam
rebuilt to withstand shitloads block
ported head. ccd chambers.
8/1 comp.
c4 auto
20 lbs maybe - see how far itcan go


should i go full efi ems comp and air to air cooler. OR gas system and run
coolant mix from converter to an air /water cooler then reservoircoolant supply.

want the thing to run well from startup not coughing and farting untill its warm.

will gas with a programable ignition sys fix the wrmup coughs on gas.
i must decide very soon. i think haltech i9 ignition sys is still available isnt it.

is the coolant through the convertors a good way of intercooling????good idea hey :twisted:

any info is goood
 
if gas then what convertors/ carb are good and cheap. thanks guys
 
Gas and turbos are made for each other!

The follwing are the before boost maximum net flywheel hp levels. With a turbo, the coverter freezes up eventually. Carbs are just gas meeters, and they can run twice the hp of the same carb in a non turbo car.

Something like Colin and Violet Townsends 265 Hemi VG Valiant runs about 20+ boost with one E-series coverter and a CA 425 carb, but the converter will eventually freeze up even though it does 375 hp at the rear wheels ( 475 hp net)

Impco CA 425, a 460 cfm, 287 hp carb wont fit without a bit on panel hammer work on the hood, but it is far and away the best carby. It is expensive.

The CA 300 isn't able to take more than 9 pounds reliably as it is a diaphram carb. Power ranges from 216hp for the 348 cfm A1 to 280 hp for the 432 cfm A5. The bigger one is rare as hens teeth.

The CA 225 has 329 CFM, and gives 207 hp unboosted. Since 250-325 hp is the limit before the converter freezes, they can go up a fair bit under turbo boost. It's a diaphram carb too, but its pretty stout, and would take a fair bit of boost.

There are CA 125's which flow 126 hp from 202 cfm. These are really good if you have three....378 hp!


The E-series Impco is a 325 hp coverter, flows 30% more gas than the Impco L-seires.
 
run 2 converters, will it freeze.??????

what about running the convertor water solely through the water air intercooler. will that freeze???

the ca 425 carb with twin b2 convertors good combo,,,



need to know about the intercooler system though....

thanks guys
 
Halo,

I think the convertors will freeze because of the moisture in the atmosphere even if the water continues to flow inside them due to antifreeze.
Have a look at my mates corty on my homepage for ideas. He never had freeze problems - just tyre burning issues.

To see photos, scroll to the botom of my page and click on "MILOS MONSTER"

http://home.primus.com.au/chalikouras/

Cheers
 
A mate of mine has a hot 250 in an XF on bar-b-q fuel
He has the standard EFI manifold but the throttle body has been modified to take a thing called an "air rod". With a bit of machining to the mouth of the T/B the air rod then slots into place its the same DIA as the T/B and is almost un detectable appart from the hose that goes to the converter.
CFM is determined by the size of the T/B it has vary little restriction on flow
and would be perfect on a turbo set up.
Another friend has the same set up on a fairly worked 350 chev that has 13to1 comp he runs one 250 T/B and air rod says performance is unreal.
 
best way to stop freezing is to instal a small davis craig(the fan guys)booster pump and hook it up directly from the back of the head(or where the water is the hottest)straight into the converters then back into the block.i do this on my son-in-laws blown holden 6(2X225 & 2X L converters)and we get no freezing all the way to 7500rpm.my naturally asperated hemi 6(3X225 &2XE converters)the same and the resutes are just as good.
 
Hey George, What kind of converters did you use with the twin gas research setup?

Dom
 
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