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Old 06-06-2019, 06:33 PM   #1
autoloclys
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Default best cam for a b230F +t, daily driving

at the risk of asking "how much boost can stock support"

I have a B230F squirter engine that is going to into my LH2.4 +t wagon, is there any consensus on the best cam for spirited daily driving?
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Old 06-06-2019, 06:40 PM   #2
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Daily driven? Probably a T cam. Want to have some serious fun? Enem V16.
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Old 06-06-2019, 07:07 PM   #3
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ipd turbo cam is probably the easiest to lay hands on
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Old 06-06-2019, 07:30 PM   #4
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^this is probably the best suggestion for what most people want on this board.
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Old 06-06-2019, 08:33 PM   #5
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I have a 91 740 wagon with a +T and 15G
With the T cam i could do brake stands and the car left hard off the line.
With an IPD turbo cam, its a little laggy, but crazy fun past 3K rpm.
still drives fine off boost under 3k, but not nearly as torqey with the T cam.
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Old 06-06-2019, 09:23 PM   #6
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Pretty much anything other than the M cam that the engine came with.

As stated before, T seems to work well in a +T configuration as you have more compression in an NA motor.

An A, V, iPD turbo or other cam would be good as well. More duration + more lift = more fun (up to a limit).
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Old 06-06-2019, 09:31 PM   #7
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^^good suggestions
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Old 06-06-2019, 11:30 PM   #8
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A cam is a nice improvement and cheaper than the IPD if your budget is tight.
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Old 06-07-2019, 01:19 AM   #9
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honestly, t-cam
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Old 06-07-2019, 06:03 AM   #10
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Thanks for the advice.

Since the T cams seem harder to find the IPD turbo cam sounds like the next best option

The ipd turbo cam description makes it sound like it's focused on high revving performance @>5000 tpm. But It also improves low end? For daily driving I'm assuming idle to 4000 is where I care most about

Sorry for a basic question. Cam tuning is new to me
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Old 06-07-2019, 08:59 AM   #11
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Quote:
Originally Posted by autoloclys View Post
Since the T cams seem harder to find the IPD turbo cam sounds like the next best option
Post in wanted section...shouldn't be too hard to scrounge up a T cam.

*Edit: here is one for sale
http://www.forums.tbforums.com/showthread.php?t=349446
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Old 06-07-2019, 02:37 PM   #12
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Automatic or Manual? What turbo? How much low speed / stop-n-go daily traffic?

Are you OK with running/shifting at higher RPMs most of the time so that you can have best high RPM performance, or would you prefer less performance and more sedate shift points?
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Old 06-07-2019, 10:10 PM   #13
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M47 converted from an aw70 so the ratio in the rear end is low. Turbo is a 13c at stock boost. I live in a city so a high strung engine is not ideal.
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Old 06-07-2019, 11:16 PM   #14
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It should spool nicely with the 373s.

Same gearing as the 240 Turbos came with.

Nothing wrong with the much malinged T cam in a daily driver.
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how psi stock cna support?

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Old 06-08-2019, 12:25 AM   #15
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^^^ agreed.

The late factory 240 turbo auto's had a 3.91 rear end. The 240 turbo manual's used 3.73. All the non-turbo auto's had a 3.73, so your converted auto will be the same gearing as the factory 240 manual turbos. In other words, you have Volvo's choice for a manual turbo DD.

The 13c is a smaller turbo, and is better suited to a lower RPM range. Keep your eye out for a good 15G - a bit more power but still boosts well at lower RPMs. The factory '85 turbos were a T3, which is an older design, with a bit higher RPM range.

The T cam was Volvo's choice for a turbo DD cam.

You certainly want to change to a turbo cam from your NA M? cam. In a simplistic view, the intake stroke on a NA engine sucks the fuel/air mix into the cylinder. At higher RPMs, the momentum in the intake manifold helps push air into the cylinder. On a turbo engine, the boost pressure also pushes the fuel/air mix into the cylinder. With this, you need a cam with less overlap than a NA cam to avoid the boost pressure pushing the fuel/air mix straight through the cylinder and immediately out the exhaust.
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Old 06-08-2019, 03:38 AM   #16
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Quote:
Originally Posted by bobxyz View Post
^^^ agreed.

The late factory 240 turbo auto's had a 3.91 rear end. The 240 turbo manual's used 3.73. All the non-turbo auto's had a 3.73, so your converted auto will be the same gearing as the factory 240 manual turbos. In other words, you have Volvo's choice for a manual turbo DD.

The 13c is a smaller turbo, and is better suited to a lower RPM range. Keep your eye out for a good 15G - a bit more power but still boosts well at lower RPMs. The factory '85 turbos were a T3, which is an older design, with a bit higher RPM range.

The T cam was Volvo's choice for a turbo DD cam.

You certainly want to change to a turbo cam from your NA M? cam. In a simplistic view, the intake stroke on a NA engine sucks the fuel/air mix into the cylinder. At higher RPMs, the momentum in the intake manifold helps push air into the cylinder. On a turbo engine, the boost pressure also pushes the fuel/air mix into the cylinder. With this, you need a cam with less overlap than a NA cam to avoid the boost pressure pushing the fuel/air mix straight through the cylinder and immediately out the exhaust.


Would you please stop it with the facts and common sense, this is Turbobricks home of the hopeless hapless dreams.

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Old 06-08-2019, 04:55 AM   #17
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If limited to used Volvo cams the A cam is the best bet for a daily.

If aftermarket the T3 grind is a great cam for a daily that still has decent low end but a much better mid/higher end
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Old 06-08-2019, 12:02 PM   #18
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Good evening Dai.
T3 cam?
I need a little help, where you will find a T3 cam?
Which company grind this?

Regards, Kay
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Old 06-08-2019, 12:51 PM   #19
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Ok while you are a city driver. The car has a 3.73 rear which likes a few rpms. It is fine with a T cam which is volvos choice. But in my experience it is even better with a cam that gives the engine more mid and high rpm power. The low gearing will still give you fine low rpm torque but having a better mid and top end will put more smiles per mile.

A Volvo A, or B cam is a good choice. If you go aftermarket I have only good experience with enem cams. The V15T would be what I suggest. I've been running that in my turbo for many years now.
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Old 06-08-2019, 04:05 PM   #20
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Do you care about emissions? If not, you can go with a wider variety of cams, and tradeoff worse idle for better higher rpm performance. Compared to swapping in a +T'd engine, swapping cams is easy. Pick one and give it a try, while keeping an eye out for a different cam choice, and a 15G turbo.
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Old 06-10-2019, 11:00 AM   #21
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My T cam with 15G was fun and really torquey. I also noticed that I could brake boost and blow the tires off with the T cam, but once I swapped in the IPD cam it doesn't really build any power until about 3500rpm but breathes way better up top. Both cams were fun for different reasons.

Anyway I do have a T cam for sale. I think I have someone pending purchase though.
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Old 06-10-2019, 11:55 AM   #22
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Running T cam on my +T now. Dat torks. For a DD, not bad, but I do miss the punch a good cam gives.

Was running a V cam, which I liked better, but cam had some damage and decided to try the T cam from my parts pile.

I'd only put any effort in sourcing a decent/real/non-stock cam if you are planning to do supporting mods. Check if valve springs are any good, play around with ignition timing and mixture. The B230F generation i'm running has weak valve springs from factory and until I change those no fun cam will work, heck even now valves like to float.
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Old 06-10-2019, 12:02 PM   #23
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T or V seem like the best bet for a regular street car with a street car powerband.
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Old 06-10-2019, 12:57 PM   #24
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This^

You never notice the torque loss below 2500 because no AW7x ever operates at that low RPM.
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Old 06-10-2019, 06:34 PM   #25
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T cam
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