FrontEngineDragsters.Org Forum
Technical => Spud Miller's Cave => Topic started by: tcoupekyle on July 16, 2018, 07:34:03 PM
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I got the car to start but idle and Rev it will not do very well. Barrel valve adjustment seems like it does nothing. Then if you try to throw a Rev it slowly climbs the rpms.
I don't have a clue what to do. Any ideas?
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Is the system flowed? Is it plumbed correctly? What spring pressure is your idle bypass set at?
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https://photos.app.goo.gl/4pZeoBmptyJqZbNWA
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IDK if it had been flowed IDK if it's plumbed right...
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How can I tell the pressure?
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Is distributor timing on, lots of fire out the zoomies is a tooth retarded timing? BV leakage%?
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I have timing set at 36 degrees. IDK about barrel valve leakdown.
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Don't know your details that Paul brought up but mine for straight methanol was 28% +\-BV leak, 130+\- main jet with 2 psi idle bypass on a 6.08 gpm pump at 4000 rpm, throttle plates at .003 Hilborn 2 7/16" on a 467 inch BBC.
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Mines a 468 .090 pill aside from that I don't know if seems like it's giving it way too much fuel.
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Best advice I can give is send your pump, injectors and bypasses to Spud at Fuel Injection Enterprises and have it flowed and the tuneup will be very accurate, no guessing and no broken parts and it's very inexpensive.
Mark S
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Look at this page it shows the plumbing, is this how you have yours?
http://hilborninjection.com/wp-content/uploads/2016/02/installation.pdf
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I was looking at that schematic but mines done differently
.
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sorry if I was closer would drive over and help you steve m
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Best advice you have gotten or will get.Same as above get it flowed regardless who.They will get you about dead on and can advise you after the sell. Compare cost of flowed system to cost of wasted fuel,wasted oil if milking it and any parts you could break along the way like flexplate from hard kick back. You will see where flow job is money ahead.
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Thanks guys I think I'll be getting it flowed
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Best, cheapest and quickest way to tune it is on the dyno assuming you have an operator that knows injection. They can get it right in just a few pulls if they know what they are doing.
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My experience is best is dyno runs, but it is the most expensive unless you have a buddy that will let you have as many runs as you need to get a handle on your tune-up. Then you can send your dyno chart to your converter company to get your engine matched to your converter.
One thing I have learned is using the dyno tune-up at the track it will be on the fat side, mostly because the engine dyno loads the motor more.
Another issue is finding a dyno shop that will let you run alky, it is stinky, and they need an alky only fuel tank. The best dyno shop will also let you run with zoomies instead of collector pipes.
With my 1'st SBC JrFuel combo I had Don Enriquez at Hilborn and Bob McKray [ ex Hilborn staff, and engine builder and tuner for Don Enriquez JF ] set up the combo, and learned from there.
With our early Hemi, Gene Adams set-up that combo, along with building the Hemi. Our last Heritage championship was with the Adams Hemi. About 3 years ago I had Kinsler build me a set of angle cut SBC injectors, to make injectors/stacks as short as possible for better hi-rpm hp. But I started with my Hilborn tune-up. ie same pump size, nozzles, by-passes, BV seting, of 18%.
As a riminder, Heritage JF rules are iron heads, iron block, under 410 ci [ new rule allows 430 ci] stack injectors on pure alky, and zoomies.
My advice , if you don't have a dyno buddy , is call, send your injectors for base line set-up to Spud, Gene Adams, or Hilborn. Not that other injector guys can't do a good job, but that's all I have used. i can't tell how many teams get lost on their tune-up , by getting off on an idea, and when I've told them to go back to their Adams base-line tune-up, they get better. BTW Don Enriquez is real good at giving phone advice , no matter what brand of injectors you have.
Call me if you have ???'s 805-444-4489
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I second your comment on Don Enriquez.
When I first started running fuel injection I called Hilborn and ended up talking to Don.
Incredibly knowledgeable and patient, I learned a lot with that phone call.
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Thanks everyone what a wealth of knowledge.