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Discussion Starter · #1 ·
Hi. For my '93 240 (B230F) with L engine (round-tooth timing belt), I'm looking for a better cam. My preference is not high revving, but an improvement in low to middle rpm boost in output -- more torque! I've heard a lot about A, K, and other cams, as well as VX and VX4 or VX6. I don't have the right gears for IPD's adjustable gear, but perhaps a cam with "built-in" advance (from the position at which it attaches to the gear) would work? Anyway, what cams do you recommend (I'm looking to buy new, rather than get from a p-n-p yard -- there are none around here that have any Volvos, anyway). Where would I shop for such a low-end boosting cam? Thanks all.
 

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Re: Advice needed on choice of new cam (KenC)

Based on the description of what you're trying to achieve, I don't think you have any options. The M cam has a very conservative profile that's intended to deliver the most torque from 1000-3000 rpm. The other cams you mention -- as well as all others intended for automotive use -- simply move the torque curve around in an effort to increase bhp.<p>Torque is a function of volumetric efficiency and engine capacity. Moderate increases in VE, while preserving low-end torque, can be achieved through cylinder head and intake manifold porting. Unless you're willing to go to forced induction (supercharger, turbo), the engine's peak torque will be limited by its displacement and valve layout.<p>The only trick that you could do to increase motive force would be to change rear axle ratios. This would effectively increase torque *at the rear wheels* using the multiplicative effect of gearing. <p>Hope this helps,<p>
 

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Re: Advice needed on choice of new cam (RearWheelPaul)

Thanks. I was hoping for better news, but I'm glad to hear from someone as knowledgable as you (I have and enjoyed your book <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0">.<br>Best regards,
 

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Re: Advice needed on choice of new cam (KenC)

If you have a manual trans the street performance cam from IPD may be what your looking for. I put one in my 91 740 wagon and if you get past 3500 rpm I noticed that it doesn't run out of steam like it did before. But getting my AUTOMATIC up there is hard. Had to have the head reworked anyway as the head gasket was leaking oil and water out side the block. No internal leaks! No real differnce on the lowend and if you look at IPD's data that's what they claim.
 

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Re: Advice needed on choice of new cam (VolvoBob)

IPDs performance cam (which shares profiles with the VX) is softer up until about 1800 rpm. After that it's equal to the M in torque until 3000 rpm, from which it continues to deliver consistently good torque until a little over 5000 rpm.<p>My book illustrates this by comparing torque and bhp curves in an M and VX equipped B230F.<p>I wouldn't recommended a VX in a 200-, 700-, or 900-series car with an automatic transmission unless a torque converter with a higher stall speed is installed. Such a mod will reduce the low-end torque disadvantage of the VX to an unnoticable level.<p>
 

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Re: Advice needed on choice of new cam (KenC)

A 3.73 axle from an automatic 240 will do a lot to improve acceleration and make it feel more powerful.
 
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