C-460 heads and T-stops

was offer for a set of heads from a good friend, they are complete, and fully ported, he wants 3500 and only have a season on them, ran on a 648bbf n/a. went to a set of thor 2 heads and no2, my question is since they were open up so much how would they run coming off a t-stop? putting a bigger inch motor to run in super gas when im not running top sportsman. are the ports too big and would it fall on its face? i wanted to run a set of profilers with a single 4 but was told the motorsport c heads were better off for s/g. whats your thoughts?
4.600 bore x 4.75 stroke,

Should work fine

No problem...
That 4.75 arm will pull up strong from a dead idle.
I have a buddy in Div2 that runs S/G with a BIG set of C heads and single 4.
9.90 at 173++. Very competitive.
Keith

Rickyt630x wrote:was offer for a set of heads from a good friend, they are complete, and fully ported, he wants 3500 and only have a season on them, ran on a 648bbf n/a. went to a set of thor 2 heads and no2, my question is since they were open up so much how would they run coming off a t-stop? putting a bigger inch motor to run in super gas when im not running top sportsman. are the ports too big and would it fall on its face? i wanted to run a set of profilers with a single 4 but was told the motorsport c heads were better off for s/g. whats your thoughts?
4.600 bore x 4.75 stroke,

To be truthful, I don't understand the essence of the question. I need some help understanding the sentence & paragraph structure.

Who went to Gen II Thors,and who is running C-460 heads? How do you know they were opened up so much? What's the intake port volume in terms of cc's? Which heads? I'm lost.

But whoever told you the Motorsport C -460 heads were better off of the throttle stop for racing Super Gas,,,, was trying to sell you a set of Motorsport C-460 heads!!! When people give you advice in regards to racing, you need to ask yourself what is their real agenda ???

Charlie Evans

@ Charlie, was told the c460 heads flowed 440cfm intake and 380cfm exh. havent seen the chart yet but was told if i wanted to buy the heads he'll throw the chart in but wasn't going to show unless i were to buy, he went bigger on his motor and bought a set or thor 2 heads off racingjunk. he offered me the heads (motorsports c460's) complete with a matched ported intake as well. when i was told the c460 heads are better off i kinda figured someone was trying to sell me a set of heads (that came from an engine builder but i wont say any names) but was just wonder if the amount of air flow was too much for coming off the t-stop and stumble or would it pick up just fine, i talked to a few guys who run bbf's and got a mixed reaction, would a set of profilers be better off? i would prefer if i could run them with a single 4 since the other motor has a set already on it, (keep from ordering parts easier and simple for refreshens)

@ Wheelie58 any chance on knowing the set up? would like to get it to run around the 175mph off stop, car has 33.5x17 goodyears on it with a 4.10 gear, also know the weight of it? is he real close to the s/g limit or a little over? thanks again for all your replies.

Well those flow numbers of 440 cfm for C-460 heads are pretty poor. They must be unported. I suspect the 380 cfm exhaust numbers are with a test pipe, however you need to ask the question and find out. I'm not liking the snow job this person is giving you, about not giving you a flow sheet unless you buy and etc..

As far as coming off a throttle stop, IMO you want some really good flowing heads with a lot of port velocity. The heads that are best coming off of the throttle stop are the ones with the better mid-lift flow numbers. The better porting and flow testing shops can measure their port velocity and should be able to give you some accurate numbers in terms of ft./sec.. If, if you have a stumble, don't blame it on the heads, look at your carb first.

Yes, you can run the Pro-Filer 205 heads with a Ford C-460 single carb intake manifold. You will need .200" worth of spacer between the manifold and the intake surface of the head. I make those spacers out of UHMW and also the china rail spacers to go with it.

Charlie

ok thanks charlie thats what i was looking to hear.

everyone wants to run Top Sportsman power in Super Gas these days. I hate it

steven gregoire wrote:everyone wants to run Top Sportsman power in Super Gas these days. I hate it

X2 it really takes the fun out of it and adds a butt load to the cost of something that was supposed to be economical.

that being said. if you keep your RPM up while your on the stop, it should do fine. Just dont come off the stop in any gear except high (or your going for a ride)

steven gregoire wrote:everyone wants to run Top Sportsman power in Super Gas these days. I hate it

but even with the big power the cars only run 168-172mph due to being slowed down. im running some supergas at nationals around here (d1 area) etown epping, Maple grove, etc.

Well, Steve is from up that way too. You all should know each other, your both NHRA Div 1 racers.

Charlie

Rickyt630x wrote:

steven gregoire wrote:everyone wants to run Top Sportsman power in Super Gas these days. I hate it

but even with the big power the cars only run 168-172 mph due to being slowed down. im running some supergas at nationals around here (d1 area) etown epping, Maple grove, etc.

I don't know about that ... I watched last summer at Norwalk, a car on some kind of stop, I think it was a Super Gas car, which went 8.91 @ 206 mph.

its about 5-8 mph loss on the stop on average i believe. so its not a huge killer of speed, just et

rmcomprandy wrote:

Rickyt630x wrote:

steven gregoire wrote:everyone wants to run Top Sportsman power in Super Gas these days. I hate it

but even with the big power the cars only run 168-172 mph due to being slowed down. im running some supergas at nationals around here (d1 area) etown epping, Maple grove, etc.

I don't know about that ... I watched last summer at Norwalk, a car on some kind of stop, I think it was a Super Gas car, which went 8.91 @ 206 mph.

blown super comp car, 1600lbs and a bbc with 8-71. D1 has a guy with that set up. sound like him everyone bitches due to him with his 20mph difference, i wouldnt mind running him, makes driving the stripe fun lol  

I ran a set of Charlie Evans CNC ported C460,s last year in my 2500 lb super gas car. 598 inches. 6100 stall, 3800 on the stop single 1050 Stinnett carb. Ran around 165 mph they worked awesome.

dkp