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10-05-2006, 09:08 AM   #11 (permalink)
bottlefed67
 
Join Date: Sep 2006
Posts: 24
Is there power I\'m losing in this combo??

BTW on the 11.17 run I had to let off a bit for 3rd to grab and it comes out of the hole like a lazy old dog with my old 2800 stall. Thats why I'm looking for a new trans and TC.
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10-05-2006, 11:36 AM   #12 (permalink)
dfree383
 
Join Date: Feb 2006
Posts: 2,185
Is there power I\'m losing in this combo??

No reason to try and rev it as "high as it will go".......... Looks like a good racing convertor will really help here. Something in the 4500-5000 rpm range. Maybe a little more gear, something in the 4.10 range. My guess would be that will get your 60' times into the 1.4's maybe a little better if the car works right.
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10-05-2006, 04:21 PM   #13 (permalink)
seefour
 
Join Date: Jan 2005
Posts: 159
Is there power I\'m losing in this combo??

yes there is power to be gained .
First off you have a set of heads that peak flow at .6 to.7 ,
your spending very little time at max lift and not getting all your heads flow over a certain amount of usable time. You have enough compression but need a larger lift cam , you might not want to install a cam with larger lift but it will make more power. IF you had .700-.735 lift with the same duration -look out. the stroke is fine, heads fow well and the 4.100 stroke is working the hell out of the port, you just need more cfm (head flow over an extended period of time, remember the valve passes all lift points twice. the longer and higher you open the valve the more air and gas will pass. A new c-4 rollerized will help with a larger stall 3800-4200 with that cam and some gear, I had a 10 inch tire car , leafsprings with southside lift bars cutting 1.46 60 fts off idle
with a 351 C and a big converter. 6.57 was best 1/8 mile et and average was 6.60-6.62 at 103-104.5 and that was a 3.5 stroke, port stuffed 4v heads 235 cc runner 312 cfm at .7 lift, nothing fancy, just a bowl blend and good valve job.. your heads flow much better at all lifts with a smaller port+ velocity

Scene a guy here in Houston run afr 225 heads on 454 small block ford 6600 shift point 5.96's 1/8 mile 2850 lb car
the motor made no more hp at 7000 than it did at 5800, the motor had used all the heads up and cam was done also.

so.the choice is yours

Mike S
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10-06-2006, 09:08 AM   #14 (permalink)
bottlefed67
 
Join Date: Sep 2006
Posts: 24
Is there power I\'m losing in this combo??

6,800 through the traps sorry, and the timing 14 initial 34 total, all in at 2,000 rpm. I'm trying to figure out how to post a pdf of the dyno run....

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10-06-2006, 09:15 AM   #15 (permalink)
bottlefed67
 
Join Date: Sep 2006
Posts: 24
Is there power I\'m losing in this combo??

Can anyone explain why desktop dyno shows no increases with a bigger cam...I know real world experience is 10X better than desktop but is there any merit it believing the VE of the AFR 205 heads is high enough to not require a bigger cam to fill the bores sufficiently.
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10-06-2006, 11:18 AM   #16 (permalink)
dfree383
 
Join Date: Feb 2006
Posts: 2,185
Is there power I\'m losing in this combo??

Just my opinion but your biggest ET gains are going to be found in reducing your 60' times and going to a larger cam may not be a wise choice untill you get some more gear, trans/convertor and chassis work to complement what you have.

You are already making decent power now you need to use it !!!
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