I think I posted in the wrong spot. Anyone got anything to say about the RHS sbf Iron heads?

 

They look good on paper.

 

What do you think about winsdor sr. heads? 202 intake and 160 ex. 200cc intake runners. 400+hp?

 

Nope.. I don't think they flow well enough despite the valve and runner sizes, I believe the RHS heads do better. To get 400+hp you need heads that flow as well as AFR185's and then you need either lots of rpm or lots of displacement to move enough air. Here's a chart comparing many of the popular heads..

Windsor_HeadFlow on Flickr - Photo Sharing!

And here's the RHS flow data..

 

Thanks for the input. I am going to go with the RHS heads. I found a set of windsor sr. on ebay but the deal sounds to good to be ture. 400 may be a out of reach goal but I am going to try my best to make it, and keep the engine tame enough for every day driving. When I get the thing together I will post a video of the start up. We have a shop here in town with a rear wheel dyno $60 per pull I am going to have it checked. I have heard you loose 100hp between the flywheel and the rear wheel is that about right?

 

You loose 20-25% of crank output with an automatic drivetrain if the vehicle has stock sized tires, more with bigger meats. Manual drivetrain losses are more in the 15-20% range.

This is going on a 5.8? Will it be carbed or EFI?

 

it is .030" over bore stock crank running an eldebrock airgap dual plane intake and a 650 carb.