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DRR Trophy |
I'm new to the GM aftermarket world and have been racing Mopars for ever. I recently bought a 14* 632 with 2.470 intakes, .900ish cam, 15-1 compression, with a single 1250 APD gas carb. I am just curious what to expect ET & HP wise. It will go in my dragster that should weigh around 1900 with me in it. Any help appreciated. | ||
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DRR Trophy![]() |
Done correctly, I would have to imagine it is on par with most of the 12* headed stuff, so I'd be surprised if it wasn't 4.40-4.50 range, up around or above 1200 hp... We recently just rebuilt our 565 with the 22538816 OLDS oval port heads after finding a bunch of problems from previous owner/builder, I'm realistically hoping it goes high 4.60/low 4.70 in my 2000 lb dragster thinking it'll make 1075-1100 hp.. Just fired it up yesterday, we'll see what it runs hopefully this weekend. Nick Craig 1971 Camaro Split Bumper 376ci LS3 | |||
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DRR Trophy |
Thanks for the info, hope yours does better than expected. | |||
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DRR Trophy![]() |
i run that combo and have been 4.46 best javascript:avatarPopup('http://drr.infopop.cc/eve?u=75060333&x_is_avatar_select=Y&a=profile&adminnewreg='); | |||
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DRR Pro![]() |
I have a 615 with those heads, 4.428 best in 500 feet DA. 4.48 at 2500 DA. They like RPM. 7850 in the lights in Super Comp mode at 184 MPH. ![]() Crew Chief Pro 7.980. It is not an evolution in Crew Chief Software, it is a Revolution in Crew Chief Software Drag Racing Software and Professional Weather Stations(309) 688-2990 Visit us on the web at http://www.crewchiefpro.com Are you a Producer or a Parasite? Author of the book, "But Who Will Save The Children." | |||
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DRR Trophy |
Thanks guys, that's what I am hoping for. Has anyone put a small shot of NOS on one, like 150? | |||
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DRR Trophy |
Also, any weight's on the cars would be helpful. Steel or aluminum block? | |||
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DRR Pro![]() |
Tommy my car is 2045 with me in it. I have ran a 150,200,250,and 300 shot on mine but it is smaller than yours at 615. Steel block. | |||
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DRR Trophy |
Thanks for the info Moe. I'm just curious if I could make the show with a 150 shot for a few seconds. I don't think my car will weigh more than 1900, maybe 1950 with me in it and an aluminum block. | |||
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DRR Trophy![]() |
After getting out with mine, it ended up only going about a 4.81 at 142-143 currently. I have a few things to play with, hoping to get it into the mid 70's sometime with current setup, but my car weighs roughly 2000-2025 with me in it. I might try a couple converters and play with timing and jet just a touch to see how much more I can get out of mine with the current combo. What do your guys' cam shafts look like? I'm kind of wondering, and have been told mine is possibly off a little on my exhaust duration/overlap numbers. Nick Craig 1971 Camaro Split Bumper 376ci LS3 | |||
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DRR Pro![]() |
288/314@.050 116* | |||
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DRR Trophy![]() |
Mine is 283/296@.050 114* separation. It's like 881/824 lift. From what I am reading this seems like more of a conventional headed 565-598 cam, and I need a ton more exhaust duration at the least. Nick Craig 1971 Camaro Split Bumper 376ci LS3 | |||
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DRR Sportsman![]() |
It's only still a 565. You are going to have to turn it with no inches and those heads. They are made to move air and like cubic inches. A converter with at least 6600 flash Be careful with cam choices, if your compression is not 15. or more. | |||
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DRR Sportsman![]() |
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DRR Trophy![]() |
Converter goes to 6700, lobe is a .476/.456 or something, 1.85/1.80 int/exh rockers tho. Compression is 15.25-1. I tried playing with shift, didn’t seem like I gained anything going from a 7400 to 7700 shift. 60’ was ok at a 1.075, but doesn’t seem to mph any.. Nick Craig 1971 Camaro Split Bumper 376ci LS3 | |||
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DRR Pro![]() |
Here are the specs for a 565 i had with the same heads on it. 284/307@.050 114* and .507 intake and .474 exhaust lobes. I ran this in my Undercover dragster that was closer to 1920lbs with a shorter 33 tire and it ran 7.18-7.20 around 188-190mph | |||
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DRR Trophy |
Have same combo as op. 632 steel block 1250 apd runs 7.00 and 6.75 with a 150 shot. 09 undercover swingarm 2000lbs loaded up. | |||
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DRR Pro![]() |
There you go Tommy. | |||
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DRR Trophy![]() |
That’s what I’m thinkin right there... Nick Craig 1971 Camaro Split Bumper 376ci LS3 | |||
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DRR Trophy |
Thanks for the info guys! I guess with a 150 shot I might qualify if people don't get faster next year........maybe. | |||
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