Upgrading heads 195cc to 220cc's.
02-04-2013, 05:28 PM
#41
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02-04-2013, 08:36 PM
#42
Racer
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Headers, no cats, true dual to flowmasters. My power curve is flat, does not drop off after 6200, but because I am running an auto, I need all the rpms I can get on the 2-3 shift. I am making 400 at the rear wheels.
02-04-2013, 09:01 PM
#43
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Sounds good. What rwtq. Throw dyno up if you have it....
02-04-2013, 09:42 PM
#44
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The dyno charts are at my son's house I will see. if I can find them. I am getting ready to make a few more pulls to see if the new precision converter and the newly rebuilt 700r make any difference. Look for it in a couple of weeks. And I forgot, crossXovers in the exhaust.
Last edited by T. Wayne Nelson; 02-04-2013 at 09:58 PM.
02-05-2013, 02:24 PM
#45
Drifting
I still have the dyno sheet in an email if you want to see it for anything shoot me an email.
02-06-2013, 06:22 AM
#47
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Thread Starter
Mike you deleted the post about not spending money on my car, and taking the family on a vacation. To let you know. I am taking the girls to Disney this year, and I'd never put the car ahead of my family.
The 220's were not out then.....
Take care!
02-06-2013, 07:32 AM
#48
Le Mans Master
FWIW I am not convinced that the resonators are much of a restriction if any. Here is what I am basing it on. The motor in my signature would run the same times with the factory resonator and then removing it, and installing 2, 3in. bullet cats in its place.
With my current motor, I am running the stock exhaust, including the factory resonator, but I have the magnaflow mufflers, and of course LT headers. Its made 462 rwhp on E85. In time im going to put a pressure guage in the exhaust and see what the backpressure is.
Good luck with your new heads.
With my current motor, I am running the stock exhaust, including the factory resonator, but I have the magnaflow mufflers, and of course LT headers. Its made 462 rwhp on E85. In time im going to put a pressure guage in the exhaust and see what the backpressure is.
Good luck with your new heads.
02-06-2013, 07:52 AM
#49
Safety Car
If you go bigger heads just go huge and change the cam while you're in there. Change the heads and not the cam and this is just another useless discussion.
/subscribing to ricks thread in 2014 titled:
" going from small cam to bigger cam. I didn't listen AGAIN!"
02-06-2013, 09:42 AM
#50
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The 195s in my case were the l98 series and was a 1205 gasket size, the same as my MR I. In visiting with AFR I would have loved to have the 220s but I would have to have made too many changes to go to the larger 1206 size. I had spent all of the money that I had wanted to spend and elected to stop right there. 400 rwhp is plenty for an old man like me...
02-06-2013, 10:20 AM
#51
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St. Jude Donor '05
02-06-2013, 11:28 AM
#52
Safety Car
The 195s in my case were the l98 series and was a 1205 gasket size, the same as my MR I. In visiting with AFR I would have loved to have the 220s but I would have to have made too many changes to go to the larger 1206 size. I had spent all of the money that I had wanted to spend and elected to stop right there. 400 rwhp is plenty for an old man like me...
Where to draw the line?? I built my motor and its staying the way it is until it explodes. I believe if anyone can be happy with what they have they are truly winning.
02-06-2013, 09:22 PM
#54
Race Director
Thread Starter
Rick I hope you know that post was in no way a shot at you I was merely trying to say leave well enough alone.
If you go bigger heads just go huge and change the cam while you're in there. Change the heads and not the cam and this is just another useless discussion.
/subscribing to ricks thread in 2014 titled:
" going from small cam to bigger cam. I didn't listen AGAIN!"
If you go bigger heads just go huge and change the cam while you're in there. Change the heads and not the cam and this is just another useless discussion.
/subscribing to ricks thread in 2014 titled:
" going from small cam to bigger cam. I didn't listen AGAIN!"
02-06-2013, 11:25 PM
#55
Melting Slicks
AFR 220's will work fine with the cam you have. If I was going 7000rpm solid roller, I would probably go with some 235's. These heads will work fine with a 236/242 cam. A 421 can handle some pretty big heads.
02-08-2013, 09:54 AM
#56
Burning Brakes
I got speier 245's with a csa of 2.72 inch sq on my lil 401 with 9 to 1 comp and twin snails. Drives just as torquey if not more powerful as the old afr 195 heads and smaller cam. Conventional wisdom would have said too big and it will be lazy lol. 400"+ motors breath well, give them some air 
Joe sherman posted on another forum that on a 550's hp 406, afr 220's are 20-25 hp better than afr 210's. i am willing to bet you will see about same gains if not 5-10 more, mainly alittle more rpm potential out of that motor. Thats gonna broaden the power curve and make for a faster car.
Joe sherman posted on another forum that on a 550's hp 406, afr 220's are 20-25 hp better than afr 210's. i am willing to bet you will see about same gains if not 5-10 more, mainly alittle more rpm potential out of that motor. Thats gonna broaden the power curve and make for a faster car.
02-08-2013, 07:09 PM
#57
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Thread Starter
02-08-2013, 07:10 PM
#58
Race Director
Thread Starter
I got speier 245's with a csa of 2.72 inch sq on my lil 401 with 9 to 1 comp and twin snails. Drives just as torquey if not more powerful as the old afr 195 heads and smaller cam. Conventional wisdom would have said too big and it will be lazy lol. 400"+ motors breath well, give them some air
Joe sherman posted on another forum that on a 550's hp 406, afr 220's are 20-25 hp better than afr 210's. i am willing to bet you will see about same gains if not 5-10 more, mainly alittle more rpm potential out of that motor. Thats gonna broaden the power curve and make for a faster car.
Joe sherman posted on another forum that on a 550's hp 406, afr 220's are 20-25 hp better than afr 210's. i am willing to bet you will see about same gains if not 5-10 more, mainly alittle more rpm potential out of that motor. Thats gonna broaden the power curve and make for a faster car.
02-15-2013, 07:51 PM
#59
Race Director
Thread Starter
Rick I hope you know that post was in no way a shot at you I was merely trying to say leave well enough alone.
If you go bigger heads just go huge and change the cam while you're in there. Change the heads and not the cam and this is just another useless discussion.
/subscribing to ricks thread in 2014 titled:
" going from small cam to bigger cam. I didn't listen AGAIN!"
If you go bigger heads just go huge and change the cam while you're in there. Change the heads and not the cam and this is just another useless discussion.
/subscribing to ricks thread in 2014 titled:
" going from small cam to bigger cam. I didn't listen AGAIN!"