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| Returning Fiero Owner - Let's Talk 2.8 Breathing (Page 8/14) |
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lou_dias
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APR 10, 07:55 PM
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| quote | Originally posted by jjd2296:
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Wow you did a nice job there, but remember - I speculated that there is such a thing as too big an opening. I did lose a few ft*lbs of torque below 4600 rpm if you watch the video I made of my dyno on the first page of this thread. However - if you're going for power to 6000+ rpm then great![This message has been edited by lou_dias (edited 04-10-2020).]
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jjd2296
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APR 11, 08:00 AM
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Ya I’m going for more hp higher in the power band as you did. A little more pull higher up is good.
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jjd2296
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APR 11, 08:46 AM
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| quote | Originally posted by SpaceLion:
Part/Service for sale?
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haha this took me 6 hours to do! not hard just takes time and a bunch of Dremel cutters and sanding bits. if I was going to do this I would have to charge 200 plus part cost and shipping.
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sourmash
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APR 11, 09:22 AM
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1)For NA application only going to the 5500 RPM range would it be better to open the runners up internally instead of the above modification?
2) For turbo application which would be better, or would both be optimal?[This message has been edited by sourmash (edited 04-11-2020).]
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jjd2296
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APR 11, 09:28 AM
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I’ve done both this muddle intake mod as well as the plenum mod eliminating all the runners internally there (first page) I have also bored the TB to just over 57mm with the plenum neck to match. My plan is to dyno the car now with a new 3.4 260h cam sprint headers ported Heads aftermarket y pipe Rodney dickman performance pully set up. Then dyno it after I install the modified plenum and middle intake and go to 1.6 roller rockers to give me the equivalent of a 272 cam. We will see how she goes. I really want more breathing and high end power band.
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sourmash
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APR 11, 09:38 AM
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That'll be interesting. Like most people, I'm never going for upper RPM power, at least not to the loss of lower and mid RPM power.
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jjd2296
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APR 11, 10:38 AM
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Lous dyno showed a minor decrease in torque not HP in the mid range. If this mod carries the HP band further up towards 5500 plus then I think it’s worth it. Everyone knows that the intake in these cars give good gain to 4500 then drop off like a rock.
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fieroguru
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APR 11, 12:48 PM
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It probably would be quicker/easier to just take the middle intake to a machine shop and have them mill a slot down the center to remove the port wall material.
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jjd2296
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APR 11, 01:07 PM
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sourmash
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APR 11, 01:39 PM
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| quote | | Originally posted by jjd2296:Lous dyno showed a minor decrease in torque not HP in the mid range and not falling on it's face above 4500. If this mod carries the HP band further up towards 5500 plus then I think it’s worth it. Everyone knows that the intake in these cars give good gain to 4500 then drop off like a rock. |
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When I said power, it didn't mean hp. I really mean torque. Most of us want torque through middle RPMs. I want increases in low to mid torque and any benefits to 5500 along with it would be great. Whether that's opening the exhaust & intake and using 1.6 lifters or if that doesn't do it then porting something in the intake, that would be ideal.[This message has been edited by sourmash (edited 04-11-2020).]
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