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RE: 428 dyno results
By Paul Lovett - 03/25/2006 10:14:08 PM; IP 70.128.255.65
Well, I think you're on the right track looking at jetting. My motor gained 24 hp going from 80/82 jets to 76/76 jets. I was way too rich.

How about the plugs? Have you looked at them right after a run?

My cam is a Compcams custom grind. It is a solid lifter flat tappet. The intake lobe is a 270XTQ and the exhaust lobe is a 276TL. The lobes have very aggressive ramps and require a lot of spring pressure for a flat tappet. I use Crane 99895 springs. The open spring pressure is 425 lbs. I don't know how long the valve springs will last or how long the cam itself will last. Definitely not a 100,000 mile cam.

Since solid cams and hydraulic cams don't equate apples to apples on duration it's a little harder to compare our cams. My rule of thumb is to subtract 8 degrees of duration @0.050" from a solid cam to get an equivalent hydraulic cam. So my 240/246 duration would be similar to a 232/238 hydraulic cam in terms of power range. So what I am getting at is your 236/236 hydraulic cam is like a 244/244 solid and a 240/246 hydraulic would be like a 248/354 solid cam. Maybe too big for an application in a 4100 lb. car?

Anyhoo, a cam with faster ramps would help low end torque to get the car moving.

Also, I haven't had my car to the track yet. It should run 115-117 mph in the quarter according the dyno results, but who knows? Maybe It'll actually run 105 mph. It's just hard to compare my dyno results with your track results.

Sorry to write a book. Hope my rambling helps. I think you have good basic parts. Keep tuning and I bet you'll get where you want to be. Let us know how it turns out.

Paul
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Collapse <a href=../ForumFE/reply.aspx?ID=26984&Reply=26984><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor26984" onclick="return false;">428 dyno results</a>&nbsp;-- <font color=#0000ff>Paul Lovett, <i>03/12/2006</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=26984', contentMargin: 60, icon: $('anchor26984') }); </script>  428 dyno results -- Paul Lovett, 03/12/2006
Collapse <a href=../ForumFE/reply.aspx?ID=26986&Reply=26984><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor26986" onclick="return false;">RE: 428 dyno results</a>&nbsp;-- <font color=#0000ff>Big Dave, <i>03/12/2006</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=26986', contentMargin: 60, icon: $('anchor26986') }); </script>  RE: 428 dyno results -- Big Dave, 03/12/2006
Collapse <a href=../ForumFE/reply.aspx?ID=26988&Reply=26984><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor26988" onclick="return false;">RE: 428 dyno results</a>&nbsp;-- <font color=#0000ff>Paul Lovett, <i>03/12/2006</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=26988', contentMargin: 60, icon: $('anchor26988') }); </script>  RE: 428 dyno results -- Paul Lovett, 03/12/2006
Collapse <a href=../ForumFE/reply.aspx?ID=26995&Reply=26984><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor26995" onclick="return false;">517 HP... Priceless...</a>&nbsp;-- <font color=#0000ff>Big Dave, <i>03/13/2006</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=26995', contentMargin: 60, icon: $('anchor26995') }); </script>  517 HP... Priceless... -- Big Dave, 03/13/2006
 RE: 517 HP... Priceless... -- Paul Lovett, 03/13/2006
Collapse <a href=../ForumFE/reply.aspx?ID=27041&Reply=26984><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor27041" onclick="return false;">RE: 428 dyno results</a>&nbsp;-- <font color=#0000ff>Hal, <i>03/24/2006</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=27041', contentMargin: 60, icon: $('anchor27041') }); </script>  RE: 428 dyno results -- Hal, 03/24/2006
Collapse <a href=../ForumFE/reply.aspx?ID=27044&Reply=26984><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor27044" onclick="return false;">RE: 428 dyno results</a>&nbsp;-- <font color=#0000ff>Paul Lovett, <i>03/24/2006</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=27044', contentMargin: 60, icon: $('anchor27044') }); </script>  RE: 428 dyno results -- Paul Lovett, 03/24/2006
Collapse <a href=../ForumFE/reply.aspx?ID=27056&Reply=26984><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor27056" onclick="return false;">RE: 428 dyno results</a>&nbsp;-- <font color=#0000ff>Hal, <i>03/25/2006</i></font><script type="text/javascript"> new HelpBalloon({ dataURL: 'replyb.aspx?ID=27056', contentMargin: 60, icon: $('anchor27056') }); </script>  RE: 428 dyno results -- Hal, 03/25/2006
RE: 428 dyno results -- Paul Lovett, 03/25/2006
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