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| Project 3400 Roller Cam Block (Page 50/82) |
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La fiera
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JUL 19, 08:22 AM
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| quote | Originally posted by lou_dias:
Thanks! Out of curiosity what cam are you running?
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Adv. Duration 274*
Duration @ .050 230*
LCA 112
Lift @1.6 .512
Not the greates idle but for what I use it, track only; it is just fine.
http://youtu.be/dsmLNzb_P0g
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lou_dias
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JUL 19, 12:35 PM
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Looking back at my 187/249 dyno I find it odd that I had an easier time controlling my A/F ratio with the stock Fiero computer using Mustang injectors than the '7730 ... Like: WTH!
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zkhennings
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JUL 19, 05:35 PM
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| quote | Originally posted by La fiera:
Adv. Duration 274*
Duration @ .050 230*
LCA 112
Lift @1.6 .512
Not the greates idle but for what I use it, track only; it is just fine.
http://youtu.be/dsmLNzb_P0g |
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Are you kidding that sounds awesome!
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lou_dias
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JUL 20, 11:34 AM
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| quote | Originally posted by La fiera:
Adv. Duration 274*
Duration @ .050 230*
LCA 112
Lift @1.6 .512
Not the greates idle but for what I use it, track only; it is just fine.
http://youtu.be/dsmLNzb_P0g |
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What about injectors and ECM?
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La fiera
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JUL 20, 01:41 PM
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| quote | Originally posted by lou_dias:
What about injectors and ECM? |
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I believe I have 21#s and they are Multec. I just got 24# Ford for my next set up. Stock ECM with Sinister thoughts.
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sleevePAPA
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JUL 20, 11:42 PM
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lou_dias
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JUL 21, 11:46 AM
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Thanks!!! I was going to experiment with .67 at 12.8 but with this reading of .627 at 13v - it should probably be .61 ... I hope these 19#ers are enough past 5k rpm and that I don't constantly go lean. I'd hate to have to do the whole thing again with another set of injectors...
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La fiera
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JUL 21, 01:31 PM
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" I hope these 19#ers are enough past 5k rpm and that I don't constantly go lean. I'd hate to have to do the whole thing again with another set of injectors..."
Looking at your dyno sheet the 19#ers are right on the edge for the fuel requirement of your engine power levels up to 5k. After that they can supply more than the engine needs.
I say that because at 5k you're making about 185bhp and as the engine climbs to 6k its making about 140bhp. Fuel requirement for 185bhp @ 5k is around 19.20lbs/hr and at 140bhp@ 6k is close to 14.60lbs/hr.
You shouldn't have any problem increasing injection pulse past 5k to enrichen the top end.[This message has been edited by La fiera (edited 07-21-2013).]
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lou_dias
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JUL 22, 01:03 PM
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| quote | Originally posted by La fiera:
" I hope these 19#ers are enough past 5k rpm and that I don't constantly go lean. I'd hate to have to do the whole thing again with another set of injectors..."
Looking at your dyno sheet the 19#ers are right on the edge for the fuel requirement of your engine power levels up to 5k. After that they can supply more than the engine needs.
I say that because at 5k you're making about 185bhp and as the engine climbs to 6k its making about 140bhp. Fuel requirement for 185bhp @ 5k is around 19.20lbs/hr and at 140bhp@ 6k is close to 14.60lbs/hr.
You shouldn't have any problem increasing injection pulse past 5k to enrichen the top end.
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The pulse width was already larger with the previous settings. When I wasn't as lean with my prior tune I still went lean after 5400rpm on the 149/167 'low' dyno.
I've made the adjustments. Just got to burn the chip and go for a test drive sometime this week. I doubt I'll be able to get another dyno anytime soon unless I go to the 'low' shop again. Still it would be somewhat useful to see how my a/f is affected... It seems his claim of 13% lower than the other shop seemed right on.
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lou_dias
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JUL 23, 06:59 AM
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| quote | Originally posted by lou_dias:
The pulse width was already larger with the previous settings. When I wasn't as lean with my prior tune I still went lean after 5400rpm on the 149/167 'low' dyno.
I've made the adjustments. Just got to burn the chip and go for a test drive sometime this week. I doubt I'll be able to get another dyno anytime soon unless I go to the 'low' shop again. Still it would be somewhat useful to see how my a/f is affected... It seems his claim of 13% lower than the other shop seemed right on. |
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After speaking with my brother and having him look at my a/f ratio I'm either going to need higher fuel pressure or new injectors down the road. One of the many cars he's owned was a 5.0 Mustang that put down 235 rwhp on stock injectors. In V6 terms that's ~176 rwhp. He was at the limits then. With my true peak at 5200 and my low dyno going lean after 5400, I should be somewhere between 168-176 rwhp. My shift point is what concerns me. For my peak to be at 5200, my shift point needs to be atleast 5500 rpm and perhaps 5600 or a bit more. An HP loss is an hp loss. I need a little more fuel to maximize my shifts. My "curve" goes down faster because of lack of fuel. A cam with more top end will only make the problem worse.
An adjustable FPR will probably be the Band-Aid I use for the time being. My guess is 45psi at idle instead of ~39. Thoughts?
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