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Old 06-05-2018, 07:49 AM   #1
Bom
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Default A or VX3 cam for B230 na. engine with manual

I found A and VX3 camshafts very good price at local garage but curious which one is better for my car. (240 B230 na, manual transmission). Current camshaft is T cam which is ok for low rpm but very bad for high rpm. Since A cam has more lift and duration than VX3's, does it has less torque in low-mid rpm but more power in high RPM than VX3?

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Old 06-05-2018, 08:08 AM   #2
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https://forums.tbforums.com/showthread.php?t=218680

FYI...Google is super helpful to search for old threads vs the forum search engine. Type "site:tbforums.com search terms" into Google.
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Old 06-05-2018, 12:00 PM   #3
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T Cam is good for towing and stump yanking. A cam is a great improvement for a B230. Basically just about any cam other than the anemic M cam is an improvement.
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-My car: White 1991 244, 308k miles. B230F LH2.4, AW70, R134a retro. Thrush glasspack, anthracite refinished Coronas
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Old 06-05-2018, 09:20 PM   #4
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Yes, I did search and read many posts about camshaft including the one in your link which I read several times but still confused whether the suggestions were based on na engine or op’s future plan for turbo. It seems A cam was not much mentioned and not popular for this board.
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Old 06-06-2018, 10:46 AM   #5
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Ive read so much on this it gets confusing. Basically my advice is pick up a A cam for 50 bucks and run it. VX is good but you will probably have to pay 200 for it. I would not run a T, just my advice. I put a V cam in mine; but would of rather had an H.
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Old 06-06-2018, 12:31 PM   #6
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The "A" cam is not a bad cam. IMO it is great for a normal driving manual trans car and picks up some hp in 3.5k+ band. IMO there is not a lack of low end.

I am currently running an "A" cam with my B21F+T. Off boost driveability is great. I have also run a "V" cam and a "T" cam with this setup and the "V" did have a noticeable shift in the power band towards the upper rpm and the "T" had a lot of low end (<3.5k) but did not keep pulling if I wanted to rev out a gear. IMO the "A" is a good compromise where it maintains great drivability but will pull to the upper rpms if you want it to. Hope this helps.
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Old 06-08-2018, 08:11 AM   #7
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Thanks, he sells both cams ar $20 each. Cam price is cheap but he charges about $50 for installation.
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Old 06-08-2018, 02:57 PM   #8
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Thanks, he sells both cams ar $20 each. Cam price is cheap but he charges about $50 for installation.
Shops around here would charge $200 for installation. You've got a very good deal there.
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Old 06-09-2018, 01:38 AM   #9
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Quote:
Originally Posted by Bom View Post
I found A and VX3 camshafts very good price at local garage but curious which one is better for my car. (240 B230 na, manual transmission). Current camshaft is T cam which is ok for low rpm but very bad for high rpm. Since A cam has more lift and duration than VX3's, does it has less torque in low-mid rpm but more power in high RPM than VX3?

Thanks
A is a better camshaft in my opinion and experience. I havenít tried them back to back but I liked the T cam more than the VX when I ran them! I did run the T cam retarded 4 degrees and with tight clearances, though. The A maybe produces more tailpipe emissions than the VX, but itís really a great stock replacement with no downsides on an otherwise stock motor. Itís been many years since I ran an A cam, but it was a very torquey cam that still had some pull up top.

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Originally Posted by 90volvo View Post
Ive read so much on this it gets confusing. Basically my advice is pick up a A cam for 50 bucks and run it. VX is good but you will probably have to pay 200 for it. I would not run a T, just my advice. I put a V cam in mine; but would of rather had an H.
Depending on your goals, a T cam is a beast and will pull to 5,000 rpm if your setup is right. The V cam and H cam lose a lot of low rpm torque(good for mileage and acceleration without downshifting) in a stock motor in comparison to a T. The VX will have better torque than a V in the same engine. A K has better torque and low rpm drivability than an H, the peak power of the H isnít really worth it over the K in a stock, street application.

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Originally Posted by oldschoolvolvo View Post
The "A" cam is not a bad cam. IMO it is great for a normal driving manual trans car and picks up some hp in 3.5k+ band. IMO there is not a lack of low end.

I am currently running an "A" cam with my B21F+T. Off boost driveability is great. I have also run a "V" cam and a "T" cam with this setup and the "V" did have a noticeable shift in the power band towards the upper rpm and the "T" had a lot of low end (<3.5k) but did not keep pulling if I wanted to rev out a gear. IMO the "A" is a good compromise where it maintains great drivability but will pull to the upper rpms if you want it to. Hope this helps.
Agreed. But the T will pull higher with the valves set tighter(and optionally the cam timing retarded), too.
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Thanks, he sells both cams ar $20 each. Cam price is cheap but he charges about $50 for installation.
SUPER CHEAP!
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Originally Posted by dl242gt View Post
Shops around here would charge $200 for installation. You've got a very good deal there.
Or more!!
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Old 06-10-2018, 11:47 AM   #10
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Thanks a lot for more claification, i finally got vx3. It has less throttle response at low to mid rpm than T but better in high rpm. I personally prefer T cam since it matches with my application which is mainly driving in the city with traffic jam. If T had more power in high rpm, it would be perfect for me.
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Old 06-12-2018, 04:39 PM   #11
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Yes, exactly. The VX3 will give up a little bottom end to pick up some top end in comparison to an M cam or T cam. That's how camshafts work, they give up one end to increase the other if no other mods are performed. If you advance the VX3 some more, and/or try looser valve clearances, it could pick up some more bottom end torque. It may not be enough for your liking, though.

The T cam has less duration and overlap than any other factory camshaft so it will produce the MOST dynamic compression of all the factory camshafts. This means, if you don't change anything else, you will pick up more low end torque by swapping in a T cam than any other factory camshaft. Assuming you don't run into detonation problems(you won't with a stock B230).

If you want a larger camshaft to work well at low rpm, you need to pick it wisely and then also increase the static compression ratio to keep the dynamic compression ratio similar(or higher).

Here's what the T cam did for my 1987 244 automatic. First time slip is with the M cam, second is the T cam. Only go fast part was an adjustable cam gear, otherwise, power came from adjusting the valves to .012/.014", advancing the ignition timing 4 degrees(or was it 6?), retarding the cam 4 degrees, running premium gas and repurposing the preheat hose/opening for some fresh cold air in the front spoiler. Otherwise it's just a light DL with 147k on it.

M cam:


T cam:


Car picked up three tenths and 1.5mph even though it didn't feel much(any?) faster aside from the a little extra torque off the line.

If you're racing around the city streets with an automatic redlock equipped car and you don't want to pull the head for higher compression, slap a T cam in for more torque!
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Old 06-16-2018, 12:47 PM   #12
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For normal road use the VX would be the better choice in a non turbo engine. With turbo the A is better for low down. T cam is a good hammer
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