Technical > Spud Miller's Cave

Spool size on a Crower IR injection.

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dreracecar:
Are you sure you alc BV and not a gas BV ???
 
 Get the system (injector and pump) on a flow bench and get a baseline (lbs per hour fuel burned x CID)
when was the last time the pump was checked???
has the system you have ever ran before and how did it perform and what type of car was it on?
what is the indication that its lean?
what are you running for a transmission?
running without an Idle check makes it fat which is fine for cars that have a rolling start  ( Sprint cars and such)

Paul New:
I had his phone number at one time as I bought some parts from him but couldn't find it if you click on the hyperlink below you could send him a PM
http://www.frontenginedragsters.org/forum/index.php?action=profile;u=269

Sidewinder:
Bruce

We would have flow tested the hole thing if we have had time, as it need to be sent to a good friend in Sweden. Right now we had hoped to get it running for an upcoming event. The pump is brand new, and we tested it to be sure. But the system pressure indicates that it makes more than enough fuel. The Crower injection has never been tested over here, bought from a guy in the US. It came with 6 X 38A nozzles and 2x 37A nozzles, correct me if I'm wrong, should indicate that it had been running on Alky.
By lean? It does not run propperly on all cylinders, even with the .50 pill @ 4psi in the main byfass, it still would not run good. No extensive smell or sputter. With almost 50% leakdown it should have really fat.
Regarding Idle or secondary bypass, some are not using them. I know that in Nitro appication it was normally not used in older high pressure systems. Again, correct me if I'm all wrong, but what I have experienced, is that it the Idle bypass is more important on smaller engines that could not handle/burn that much fuel. It is mandatory on my small 290 cid, both on launch and going off from WOT at the 1320 mark. We will consider the secondary on this 580 cid when and if it gets enough fuel.
We are gone test some ideas this weekend and I will get back with a report or some more questions ;)

Thanks Paul, could be really interesting to get in contact with Andrew :)

Sidewinder:
Oh Bruce, and you asked if the BV is an Alky BV?
That was my intial question, how do I see that?
Hilborn BV's are the same for Petrol, Alky and Nitro, just different spools.
Does not this apply for the Crower BV's?

And as Alan wrote, these units was made for 396-427-454 cid BBC. Not for a 580 cid.
Have checked each cylinder with for leakdown,  and Spark is also OK,  so next up is that we will check the vacume in each stack with a Uni-syn and go from there..

Paul New:
If it is lean at an idle put more leak to it the engine doesn't care how much leak it has just as long as it's not lean or over fat.
Can  you whack the throttle from an idle? Does it have a stumble if so fatten the barrel valve.

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