Aftermarket Product ReviewProvide questions and answers about aftermarket parts for the Third Generation F-Body.
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I acquired a set of aftermarket Summit heads. The casting numbers in the center of the heads are DC7 and 007. On the corners they have R1 and a 2. What are these heads? They have 2.02 and 1.60 valves, a 3 angle valve job, and stock looking ports on the intake and exhaust, but I'm not sure how to find the flow specs I need for a desktop dyno. Are they Iron Eagle SS just branded by Summit, or are they something all together different? Can they make 400 hp with some port work? Is this even the forum I should be in?
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but I'm not sure how to find the flow specs I need for a desktop dyno.
hate to burst your bubble, DD it's about as dependable as the weather. but punch in the numbers for and factory motor, and you will see just how far off DD is.
just set up my accont i have an 88 iroc i have restored but this isnt really user friendlly how do i post questions on the meassage bored and how do i check them ??
It shows 8 more HP and 14 more lb/ft tq than desktop dyno, but it makes cam selection a lot easier since I use Comp cams. That's an interesting program. I wonder if it's more, or less accurate??
hate to burst your bubble, DD it's about as dependable as the weather. but punch in the numbers for and factory motor, and you will see just how far off DD is.
If you know how to use DD (which most people do not, because they don't understand engines) it can be fairly close.
I've spent hours plugging in values from dynod engines and it's all within a few hp of what the engine dyno graph revealed, so for me it's close enough to use to mock up what works and what doesn't.
It shows 8 more HP and 14 more lb/ft tq than desktop dyno, but it makes cam selection a lot easier since I use Comp cams. That's an interesting program. I wonder if it's more, or less accurate??
If you know how to use DD (which most people do not, because they don't understand engines) it can be fairly close.
I've spent hours plugging in values from dynod engines and it's all within a few hp of what the engine dyno graph revealed, so for me it's close enough to use to mock up what works and what doesn't.
-- Joe
It took alot of work to make an lt1 make the right power, where it should, I don't remember the cam timing I had to use, but they seemed like they must have had to have been way off.
I'm sure that both are exaggerated, but they really help you see if a change is gonna help or hurt you. I do understands engines and engine simulation software pretty well as I've been building engines, at least assisting, for 18 years, and used simulations to help me with decisions since DD2000 came out. I don't claim to be a genius or the best, but I have the basics. I wasn't starting a simulation thread though, I just wanted to know if anyone was familiar with the heads I acquired. I had been told that they were Dart SS branded by Summit, but had no sure info. I appreciate all of the replies though, and the flow info was helpful. I would still love to hear from someone who had those heads bench flowed with the 2.02/1.60 valves. I had a set of those before, but the casting numbers were different. They were DRT 007, and they seemed to work pretty well. Any more info on them, and opinions would be very helpful. Thanks again.
I'm sure that both are exaggerated, but they really help you see if a change is gonna help or hurt you. I do understands engines and engine simulation software pretty well as I've been building engines, at least assisting, for 18 years, and used simulations to help me with decisions since DD2000 came out. I don't claim to be a genius or the best, but I have the basics. I wasn't starting a simulation thread though, I just wanted to know if anyone was familiar with the heads I acquired. I had been told that they were Dart SS branded by Summit, but had no sure info. I appreciate all of the replies though, and the flow info was helpful. I would still love to hear from someone who had those heads bench flowed with the 2.02/1.60 valves. I had a set of those before, but the casting numbers were different. They were DRT 007, and they seemed to work pretty well. Any more info on them, and opinions would be very helpful. Thanks again.
I actually have the drt007 2.02/1.60 valve heads on my 355. They actually work pretty well.
I don't have a shop that bench flows in my area. Have you checked the actual flow on your heads?? I had a pleasant experience when I used them before, but my buddy wanted my engine so I sold it. I took the heads on trade for a TPI intake, injectors, cam, and lifters but they were new in the boxes. I'm making a 10:1 355 and wondered if they would flow enough for my engine with Stealth Ram of if I should sell them and get different heads. I would rather just use them if they flow well. That would reduce the headache of finding and dropping the cash for a new set of heads.
