Headgames/Cosworth Heads - Comparisons?
Headgames/Cosworth Heads - Comparisons?
07-07-2006, 07:26 AM
#4
Biggest advantage with going with Headgames is you have flexibility with Dave - NA Head - no problem, FI Street Heads - sure thing, or full FI Race Heads - you got it...
I haven't seen much real world data on the Cosworth heads yet, but they look like an NA head that would work ok for mild FI as well...
I haven't seen much real world data on the Cosworth heads yet, but they look like an NA head that would work ok for mild FI as well...
07-07-2006, 07:47 AM
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Originally Posted by Philthy
Biggest advantage with going with Headgames is you have flexibility with Dave - NA Head - no problem, FI Street Heads - sure thing, or full FI Race Heads - you got it...
I haven't seen much real world data on the Cosworth heads yet, but they look like an NA head that would work ok for mild FI as well...
I haven't seen much real world data on the Cosworth heads yet, but they look like an NA head that would work ok for mild FI as well...
07-07-2006, 10:15 AM
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Originally Posted by BrianLG35C
Thanks, I'm leaning toward heads over sleeves for my build. I understand the increased flow will obviously lower internal stress and will make the motor so much more efficient. Which means I can get a lot more hp/torque from less boost. This will make my new motor happy.
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07-07-2006, 11:22 AM
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Originally Posted by Nismo350ZRT
That's exactly what I'm thinking too. I'd rather spend $2-3k on the heads than sleeves. MRC's numbers are just awesome with the HeadGames heads.
07-07-2006, 11:30 AM
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Originally Posted by rednezz
On a customer service stand point Cosworth is very tight with information. Don't know why since I already bought the dang heads.
07-07-2006, 12:01 PM
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The heads are 58cc's and below is the flow chart from cosworth. Don't know much more than that. The valve train is Ferrea oversized valves with titanium retainers. I got this info from Ferrea but never could confirm with Cosworth.
Intake Valve = 52 grams
Exhaust Valve = 47 grams
Outer Spring ID = 20.8 mm
Outer Spring OD = 28 mm
Inner Spring ID = 15.88 mm
Inner Spring OD = 20.8 mm
Intake Valve = 52 grams
Exhaust Valve = 47 grams
Outer Spring ID = 20.8 mm
Outer Spring OD = 28 mm
Inner Spring ID = 15.88 mm
Inner Spring OD = 20.8 mm
07-07-2006, 12:02 PM
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Another big advantage is how easy is it to get support from Dave? If you want support for Cosworth, you have to go through w/ a large international corperation. If you want support w/ Daves heads, call dave..
Ive learned that customer support is crucial for any aftermarket item, epsecially ones that cost more than 4 grand.. Also, remember that Daves shop is US based.
Ive learned that customer support is crucial for any aftermarket item, epsecially ones that cost more than 4 grand.. Also, remember that Daves shop is US based.
07-07-2006, 12:14 PM
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Originally Posted by plumpzz
Another big advantage is how easy is it to get support from Dave? If you want support for Cosworth, you have to go through w/ a large international corperation. If you want support w/ Daves heads, call dave..
Ive learned that customer support is crucial for any aftermarket item, epsecially ones that cost more than 4 grand.. Also, remember that Daves shop is US based.
Ive learned that customer support is crucial for any aftermarket item, epsecially ones that cost more than 4 grand.. Also, remember that Daves shop is US based.
+1
Cosworth may have good heads (have yet to find out since I haven't finished my motor) but as of right now its hard to get solid info.
07-07-2006, 01:22 PM
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Originally Posted by rednezz
+1
Cosworth may have good heads (have yet to find out since I haven't finished my motor) but as of right now its hard to get solid info.
Cosworth may have good heads (have yet to find out since I haven't finished my motor) but as of right now its hard to get solid info.
07-07-2006, 01:23 PM
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Originally Posted by plumpzz
Another big advantage is how easy is it to get support from Dave? If you want support for Cosworth, you have to go through w/ a large international corperation. If you want support w/ Daves heads, call dave..
Ive learned that customer support is crucial for any aftermarket item, epsecially ones that cost more than 4 grand.. Also, remember that Daves shop is US based.
Ive learned that customer support is crucial for any aftermarket item, epsecially ones that cost more than 4 grand.. Also, remember that Daves shop is US based.
07-07-2006, 02:14 PM
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Originally Posted by BrianLG35C
Can you give a little more details on your build? When do you expect it to be finished?
I am doing a NA high compression build with Cosworth heads. I was going to use Cosworth 11 to 1 pistons, and carillo rods and get some cams ground for me with 12.1 mm lift. Now I going with cams with 11.5 mm lift instead.
I probably will not have my motor ready until fall. I orginally wanted to have it built by first week of August. However, I started kicking around the idea of using the VQ40DE block and crank and replacing the pistons and rods. .
Last edited by rednezz; 07-07-2006 at 02:24 PM.
07-07-2006, 05:04 PM
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Originally Posted by rednezz
I am doing a NA high compression build with Cosworth heads. I was going to use Cosworth 11 to 1 pistons, and carillo rods and get some cams ground for me with 12.1 mm lift. Now I going with cams with 11.5 mm lift instead.
I probably will not have my motor ready until fall. I orginally wanted to have it built by first week of August. However, I started kicking around the idea of using the VQ40DE block and crank and replacing the pistons and rods. .
I probably will not have my motor ready until fall. I orginally wanted to have it built by first week of August. However, I started kicking around the idea of using the VQ40DE block and crank and replacing the pistons and rods. .
You do know the block on the VQ40 is taller right?? It might not even fit under the hood of a 350Z with the intake manifolds bolted up.
07-07-2006, 05:30 PM
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Originally Posted by BrianLG35C
Can you give a little more details on your build? When do you expect it to be finished?
Danny
07-09-2006, 10:31 AM
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Just so I'm clear, "FI Gods"...why wouldn't you spend the budgeted amount for a build on new heads with L-19 or 1/2" studs instead of sleeves? You can run much lower psi for the same whp which lessens motor stress/headlift risk, right? What's the downside?