chevy engine in a ford...

[TheStang00]

umm cleveland heads flow way better than 350 heads. u said the 302 is a chevy engine... i didnt know that, but did u know that every nascar engine is a ford engine design.

[SkylineUSA]

Originally Posted by GTStang

Maybe stock for stock but I would bet any equal level aftermarket SBF head vs aftermarket SBC head are just about the same(sometimes chevy wins, sometimes ford) and most of the time these hot-rods wit Chevy engines don't have stock cast iron units anyway!

Yes, I was refering to stock heads. Not aftermarket, although I still think they have us because of the runner placements. What the hell was Ford thinking, oh ya, its a chevy design....my bad

[SkylineUSA]

Originally Posted by TheStang00

umm cleveland heads flow way better than 350 heads. u said the 302 is a chevy engine... i didnt know that, but did u know that every nascar engine is a ford engine design.

You think? The port velocity on my Boss 302 is so poor becuase of the size of the ports, yes it can move some volume, but that is not the whole story when it coems to a head, trust me.

[dampachi]

LS1 in an RX-7 should piss me off because it's chevy? Uh..read down some more. I don't hate chevy. I actually almost bought an LS1 car. God damn. And my names Tim, also.

[TheStang00]

well maybe its not all in the heads then... but my uncle raced stock cars... with stock engines... and his 351w was about even with a 350, prolly a lil slower but when he switched to cleveland heads he blew them away. plus ur talkin about a 302... i was talkin about the 351, the ford engine thats in the same size range as the 350.

[GTStang]

Originally Posted by SkylineUSA

Yes, I was refering to stock heads. Not aftermarket, although I still think they have us because of the runner placements. What the hell was Ford thinking, oh ya, its a chevy design....my bad

Well when I look at most aftermarket companies that make heads for both, that are equivalents the flow numbers are equal and sometime favor Ford sometimes favor Chevy.

One Ex: AFR SBF 185 vs AFR SBC190 the Ford out flow the chevies.

[SkylineUSA]

Originally Posted by TheStang00

well maybe its not all in the heads then... but my uncle raced stock cars... with stock engines... and his 351w was about even with a 350, prolly a lil slower but when he switched to cleveland heads he blew them away. plus ur talkin about a 302... i was talkin about the 351, the ford engine thats in the same size range as the 350.

He used a windsor block, with a special intake for the heads?

351C can flow, but you have to turn that engine very high in the rmp band, but it also kills the torque for the street, I mean really hurts the engine for street use. Its 2 different animals, a well built street engine, and a all out race engine.

[SkylineUSA]

Originally Posted by GTStang

Well when I look at most aftermarket companies that make heads for both, that are equivalents the flow numbers are equal and sometime favor Ford sometimes favor Chevy.

One Ex: AFR SBF 185 vs AFR SBC190 the Ford out flow the chevies.

Yes, but do flow numbers tell the whole story when it comes to heads ability to make power?

I'll do some research on it, and get back with you guys.

[SkylineUSA]

Originally Posted by GTStang

Well when I look at most aftermarket companies that make heads for both, that are equivalents the flow numbers are equal and sometime favor Ford sometimes favor Chevy.

One Ex: AFR SBF 185 vs AFR SBC190 the Ford out flow the chevies.

Looking at the flow numbers of a head, how do they measure it? With the intake on or off. When I am talking about the head design, I am not just taking about the head, but the whole intake runner. Look at number 5 on a ford intake, number one is not so hot either. There is an embalance, but I am not sure if the cam guys take that into consideration when building their cams. They should, but I have never seen it discussed.

[SkylineUSA]

http://www.airflowresearch.com/pages...Flow-Graph.gif


http://www.airflowresearch.com/pages...low-Graph2.gif

http://www.airflowresearch.com/pages...Flow-Graph.gif

Plus, look at the exhaust side. That kills the Ford. Chevy's are better when it comes to this. There are still a lot of thing I do not like about Chevy engine's, that is why I am a Ford guy.

I could not find a 190 for the chevy.

When you look at the 205SBF head, holy carp that is a good head, but you are going to need cubes to use it. That will be the ones I am going with!

The 215 Chevy head rocks as well.

[GTStang]

Originally Posted by SkylineUSA

http://www.airflowresearch.com/pages...Flow-Graph.gif


http://www.airflowresearch.com/pages...low-Graph2.gif

http://www.airflowresearch.com/pages...Flow-Graph.gif

Plus, look at the exhaust side. That kills the Ford. Chevy's are better when it comes to this. There are still a lot of thing I do not like about Chevy engine's, that is why I am a Ford guy.

I could not find a 190 for the chevy.

When you look at the 205SBF head, holy carp that is a good head, but you are going to need cubes to use it. That will be the ones I am going with!

The 215 Chevy head rocks as well.

I don't know why you have a competition flow package head listed but here are numbers right off AFR site.

SBF 185: 277 intake 191 exhuast .600 lift
SBC 195: 262 intake 194 exhuast .600 lift

SBF 225: 325 intake 258 exhuast .800 lift
SBC 227: 295 intake 220 exhuast .800 lift

So I'm not seeing where Chevy has a huge advantage exhuast or anywhere. The only big advantage stock SBC heads ever head was they came or had room to cut new 2.02 intake valves(Fuelie Heads) into them unlike Fords. Once you go aftermarket Chevy loses all advantages.

As far as intake imbalance that is only a condition mostly seen on the stock 302 EFI lower, the carb intakes did not have this issue. It can be easily fixed wit a lil porting to match flows or any good aftermarket intake manifold set-up.


Yea those 205's flow like a dumptruck... I had AFR 255's that had more work done by TEA to them. I was hoping to someday get the rest of the valvetrain so I could spin the 393W to 8,000rpm and use the heads to my advantage. I was only good to spin to 6,5000rpm. I'm thinking the tamer 205's for my TT windsor will be the ticket this time..

[SkylineUSA]

Originally Posted by GTStang

I don't know why you have a competition flow package head listed but here are numbers right off AFR site.

SBF 185: 277 intake 191 exhuast .600 lift
SBC 195: 262 intake 194 exhuast .600 lift

SBF 225: 325 intake 258 exhuast .800 lift
SBC 227: 295 intake 220 exhuast .800 lift

So I'm not seeing where Chevy has a huge advantage exhuast or anywhere. The only big advantage stock SBC heads ever head was they came or had room to cut new 2.02 intake valves(Fuelie Heads) into them unlike Fords. Once you go aftermarket Chevy loses all advantages.

As far as intake imbalance that is only a condition mostly seen on the stock 302 EFI lower, the carb intakes did not have this issue. It can be easily fixed wit a lil porting to match flows or any good aftermarket intake manifold set-up.

Yea those 205's flow like a dumptruck... I had AFR 255's that had more work done by TEA to them. I was hoping to someday get the rest of the valvetrain so I could spin the 393W to 8,000rpm and use the heads to my advantage. I was only good to spin to 6,5000rpm. I'm thinking the tamer 205's for my TT windsor will be the ticket this time..

I never look at 600 lift, I do not run my cams that high, stress on the valve train. I might go 550, but that is my limit for a street engine. I posted the wrong chart, my bad. An engine is sucking the inlet charge throughout the whole stroke, not just at peak lift. You have to look at it as a whole, not just that one aspect, right? The more I look at it though, I believe this MYTH has been busted I was going off of what my Chevy friends were tellin me...Those lying bastard As far as stock heads go, chevy has the advantage.......Ya thats the ticket...I was talking about just stock heads

I still do not like the #5 intake runner, but I guess I will have to beat that demon down as well And yes, its wreaks havok on the EFIs. Lucky me, I'm going blow through

[emokid15]

i saw a magazine where it says ford 9. and chevys have them i saw them online and its the axle or soemthing in the back tires right. or am i wrong? i just dont get it?

[SkylineUSA]

Originally Posted by emokid15

i saw a magazine where it says ford 9. and chevys have them i saw them online and its the axle or soemthing in the back tires right. or am i wrong? i just dont get it?

Ford 9" is the best rear.

[GTStang]

Originally Posted by SkylineUSA

I never look at 600 lift, I do not run my cams that high, stress on the valve train. I might go 550, but that is my limit for a street engine. I posted the wrong chart, my bad. An engine is sucking the inlet charge throughout the whole stroke, not just at peak lift. You have to look at it as a whole, not just that one aspect, right? The more I look at it though, I believe this MYTH has been busted I was going off of what my Chevy friends were tellin me...Those lying bastard As far as stock heads go, chevy has the advantage.......Ya thats the ticket...I was talking about just stock heads

I still do not like the #5 intake runner, but I guess I will have to beat that demon down as well And yes, its wreaks havok on the EFIs. Lucky me, I'm going blow through

I just posted max lift cause we were talking about the heads cfm flow capabilities but I'm sure you looked and saw what I expected they stayed pretty much equal to each other all the way from low lift to max lift.

Honeslty a little lower intake manifold porting on a few runners and some flowbench time take care of it on the stocker. I think if you flowbench each runner on aftermarket ones you'll find a very small variance in flow numbers of each runner.