[jd3]

I own a 1982 911/930 Porsche track car powered by a 434" SBC with a solid roller cam, Dart AL heads, and 13.5:1 CR. It runs thru a 930 transaxle and makes over 600 hp, and weighs almost 2400 lbs.
I'd like to run it on the street, but without filling it with race gas every time. I hope your system will let me do that.
Two questions:1)since it uses a Holley road race carburetor, how should I inject the water/methanol? And how should I trigger the injection?
2)If I were to install a tamer cam for the street(and thus increase effective CR), will your injection system provide enough detonation resistance to prevent same? And if you are forced to inject too much H2O/methanol, does it cancel out any HP gains from the high CR?

Thanks for your help.
jd3

[dvldoc]

Originally Posted by jd3

I own a 1982 911/930 Porsche track car powered by a 434" SBC with a solid roller cam, Dart AL heads, and 13.5:1 CR. It runs thru a 930 transaxle and makes over 600 hp, and weighs almost 2400 lbs.
I'd like to run it on the street, but without filling it with race gas every time. I hope your system will let me do that.
Two questions:1)since it uses a Holley road race carburetor, how should I inject the water/methanol? And how should I trigger the injection?
2)If I were to install a tamer cam for the street(and thus increase effective CR), will your injection system provide enough detonation resistance to prevent same? And if you are forced to inject too much H2O/methanol, does it cancel out any HP gains from the high CR?

Thanks for your help.
jd3

Yes it can provide you with the detonation suppression you need especially using 100% methanol and a M10 or M12 nozzle. With our new nozzles you can mount them under the carb especially if you have a spacer.

You just need to find the nozzle size you need for your application. For high compression NA you will need the progressive kit. If you have electronics on board such as a MAP,TPS, sensor you can use that to trigger that way it is proportional. If no electronics simply add a 1bar map sensor to your vehicle and the controller will read and power it on it's own to activate your system. You will use the voltage controller for this set up.

[jd3]

Thanks for your reply.
It should be easy enough to add a TPS and MAP to my engine. Are these 2 sensors adequate to modulate injection correctly?
Also,(pardon my ignorance) which progressive system are you recommending for my vehicle?

jd3

[dvldoc]

You would use the universal stage 2 and put in the comments section to replace one of the nozzles with a M10 And select the voltage controller.

You will only need one of the two sensors, I would go with the map sensor, simple and easy to install just plug in a vac line and we do carry the wire harnesses for them. 1bar map sensors can be found cheaply on ebay or local salvage yards as well as any autoparts store for a new one.

[jd3]

Thanks again for answering my questions.
Watch out for snakes in your car!

jd3

[first/thridgen]

I am running a progressive kit with a 12gph nozzel on a NA small block with 49cc dart ground to 46-47 cc iron heads (13:1) stock 87 tpi cam with sucesses with 87 octane fuel. The trick is I am running -15% in the fuel enrichment table opossed to the stock +20%

I have chosen 100% methanol as the mixture and roughly 1/2 the total fuel is methanol under load.

Power difference is little if any over the 9.3 :1 engine that it replaced so far. It pinged on 94 octane in the summer. But it was the fith season and it was dialed. This is the secound season on this engine still debugging.