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07-23-2008, 11:06 AM | #1 |
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Crate Motor question
I'm familiar with Stock Eliminator cars but am putting together a crate motor combination and had a couple questions. I've searched this forum, as well as the IHRA web site, and still had some questions. My car is a '94 Z28 (hardtop stick car) that I'm going to put a 350/330/340 Vortec motor in.
1. What class(es) will this fall in and what will my race weights be? I know it is a natural B or C car with the LT1. 2. Are roller rockers permitted? I have a set of GM LT4 SA 1.6 rockers that I picked up somewhere. 3. Who would be some good sources to contact about having a nice set of heads done? I am going to do the shortblock myself. Thanks for any help! I really appreciate it. Scott |
07-23-2008, 12:49 PM | #2 |
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Re: Crate Motor question
I just Re freshed one of my crate mtr customers 385 fast burn. When I originally did it we had to use the stamped steel rockers. They were a constant problem. It is now legal to use roller rockers in IHRA on Crate Mtrs & stockers.
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Adger Smith (Former SS) |
07-23-2008, 02:30 PM | #3 |
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Re: Crate Motor question
Gear Jammer,
I "think" this is the formula, if others see a flaw in my math, please speak up. Go to the NHRA site[IHRA uses these numbers], under "rules" pull down and select "stock car classification" The lightest weight showing for a 1994 Camaro is 3044 pounds. [in IHRA, you can use the lightest NHRA weight, although you can also use the heavier weight] So, your Iron Vortec head engine is rated at 330 horse but factored to 340 horse. Here is the formula: 340 divided into 3044 = 8.95 pounds per horsepower. The class breaks are in 1/2 pound increments so you can run the car at the top of the 8.5 - 8.99 class. Also, you can move up one class to the 8.0 - 8.49 class, or down one class to the 9.0 - 9.49 class. Thus: 8.0 x 340 = 2720 + 170 driver allowance = 2890. [probably would not get that light] 8.5 x 340 = 2890 + 170 = 3060 [maybe] 9.0 x 340 = 3060 + 170 = 3230 [most likely fit] Then, what ever Crate Motor class runs at 9 pounds is your fit.
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Larry Woodfin 471W |
07-23-2008, 04:01 PM | #4 |
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Re: Crate Motor question
Unless I'm missing it, I can't find anything on the IHRA web page. What class would be the 9 pound one? The car is going to be very light and I think 3230 would be a nice weight. With a Jerico do you think this will be a good combination?
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07-23-2008, 05:04 PM | #5 |
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Re: Crate Motor question
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Larry Woodfin 471W |
07-23-2008, 05:21 PM | #6 |
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Re: Crate Motor question
"G" crate motor
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EX 5-Doorstocker |
07-23-2008, 05:39 PM | #7 |
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Re: Crate Motor question
I think your 94 Camaro with the Iron Vortec head with a stick would be great. That cylinder head is a strong runner. Plus, the F body 3rd & 4th generation are both proven performers.
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Larry Woodfin 471W |
07-23-2008, 07:32 PM | #8 |
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Re: Crate Motor question
For a good set of heads call Tim Sloan @ 919-258-5616.
One of the nicest guys you will meet, very helpful, and specializes in crate motors.
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Bobby Lundholm 3516 G/SA |
07-23-2008, 08:08 PM | #9 |
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Re: Crate Motor question
Thanks for all the help. I'll give Tim a call on Thursday.
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07-23-2008, 09:36 PM | #10 |
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Re: Crate Motor question
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