Bracket Talk
14* Olds heads and 632 combo
April 29, 2019, 02:36 PM
bbtommyd14* Olds heads and 632 combo
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.
April 29, 2019, 03:28 PM
NC3x58Done 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
May 03, 2019, 10:59 AM
bbtommydThanks for the info, hope yours does better than expected.
May 05, 2019, 07:50 PM
DTR2214i run that combo and have been 4.46 best
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May 07, 2019, 07:14 PM
Don Higgins Crew Chief Pro SoftwareI 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.
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May 14, 2019, 12:49 PM
bbtommydThanks guys, that's what I am hoping for. Has anyone put a small shot of NOS on one, like 150?
May 14, 2019, 12:51 PM
bbtommydAlso, any weight's on the cars would be helpful. Steel or aluminum block?
May 14, 2019, 01:02 PM
T/D6591Tommy 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.
May 14, 2019, 01:36 PM
bbtommydThanks 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.
May 14, 2019, 03:32 PM
NC3x58After 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
May 14, 2019, 03:39 PM
T/D6591288/314@.050 116*
May 14, 2019, 03:59 PM
NC3x58Mine 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
May 14, 2019, 04:19 PM
Bad Newsquote:
Originally posted by NC3x58:
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.
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.
May 14, 2019, 04:25 PM
Bad Newsquote:
Originally posted by Bad News:
quote:
Originally posted by NC3x58:
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.
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. With your .881 it is probably based on a .500 +/- lobe with lash and deflection you are gonna be in the .840 range.
May 14, 2019, 04:37 PM
NC3x58quote:
Originally posted by Bad News:
quote:
Originally posted by Bad News:
quote:
Originally posted by NC3x58:
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.
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. With your .881 it is probably based on a .500 +/- lobe with lash and deflection you are gonna be in the .840 range.
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
May 14, 2019, 05:03 PM
T/D6591Here 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
May 14, 2019, 06:07 PM
Bironz184Have 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.
May 14, 2019, 06:14 PM
T/D6591quote:
Originally posted by Bironz184:
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.
There you go Tommy.
May 14, 2019, 08:39 PM
NC3x58quote:
Originally posted by T/D6591:
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
That’s what I’m thinkin right there...
Nick Craig
1971 Camaro Split Bumper
376ci LS3
May 15, 2019, 10:57 AM
bbtommydThanks for the info guys! I guess with a 150 shot I might qualify if people don't get faster next year........maybe.