99 c70 performance upgrade- new cams??
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    1. #1
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      99 c70 performance upgrade- new cams??

      have a 99 c70 with under 70k miles. It has the 2.3 5cyl, 5 speed coupe. and has unimpressive performance. In the process of repairing an oil leak, I had to remove the cam covers. If I’m removing the can covers I figured I can easily change the cams for better performance. I want to get more power out of my 2.3 as economically as possible. 270 hp or so would be good. As a side note, power is ok as is, but only over 5k rpms. I also have a 2001 c7o (auto). Power is much more, and starts at a much lower rpm range.
      That said, I have a few questions. 1- is a cam upgrade a good way to go? If so, what would be a good source?
      2- is there an accurate on line source that I can read online(other than this forum)
      3- is there a better way to get the performance I am looking for? As in more power, earlier in the rpm range?
      Thanks so much!

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    3. #2
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      I have a 99 c70 coupe with a 5 speed manual transmission, 2.3 5cyl turbo. I want to ask if it’s possible to swap out a 6 speed manual transmission from 2006 or newer c70, c30 or other passenger car that is compatible??
      Alternatively, is there anyone who knows of a good source to find the answer to my question.
      I’m hoping for good news!
      Thanks!
      Warren

    4. #3
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      99 c70 performance upgrade- new cams??

      I wouldn’t bother with cams unless you’re doing an extensive build on the engine. Cams are out there, but they aren’t cheap. It’s not like the 98 and older engines where NA cams are a drop-in upgrade. You can check out cams at vivaperformance.com.

      If you want to make some more power, a good upgrade is a 19t turbo (or K24 if you want even more, but this isn’t 100% bolt on like a 19t is), green injectors, and a tune. You can take that further with an upgraded exhaust (iPd, OBX, etc.), intercooler (Snabb or do88), and possibly a reverse intercooler piping kit for improved throttle response.
      For tuning, I recommend Hilton Tuning.

      As for a 6 speed, you can use a FWD M66 transmission out of a P1 chassis Volvo (S40, V50, C30, C70) but it’s not 100% bolt on. JaredR on this forum is building his 850R with this transmission, he can probably answer any questions you have on this swap.
      That said, I probably wouldn’t bother with it unless you’re doing a bunch of other work that requires the engine/trans to come out of the car or if you’re having issues with the M56. The M56 is a stout transmission, it can handle just about anything you throw at it.


      Sent from my iPhone using Tapatalk
      2000 V70R Venetian Red/Charcoal M56 Swapped 195k
      2003 S60 2.4T Silver/Black 112k
      1991 944 Turbo B230FT/AW70 173k
      1992 245 some of a B230F/AW70 249k
      2007 XC90 V8 AWD Sport Titanium Grey/Black 165k
      Sold-
      1998 V70 GLT Black/Beige 193k
      1998 S90- Silver/Gray 207k
      1995 850 GLT Tropic Green... crushed
      1993 944 B230F/AW71L 221k
      2000 S70 GLT Silver/Taupe 253k
      2001 S60 2.4T Black/Black 230k
      1988 744 Turbo M46 Beige Metallic/Beige 188k

      Need used parts? PM me!

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    6. #4
      Senior Member ScottishBrick's Avatar
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      Sounds like a misadjusted wastegate actuator. Set to 4.5 psi. On the 99 you could do a NA camshaft from ONLY a 99 NA, but there’s little reason the gain would be marginal. Better to spend $ on an intercooler and downpipe/exhaust.


      Sent from my iPhone using Tapatalk
      2003 V70 T5 - Mystic/Graphite - M56LK - 209k - K24/Greens/Do88/Quaife/SMF/P2R Clutch/DW300C/H&R/Bilstein TC/316mm & 308mm Brakes - SteveO Tuned
      1999 V70 T5 - Pewter/R Graphite & Alcantara - AW42 - 300k - Daily/Work Wagon
      1999 V70 T5 - Nautic/R Graphite & Alcantara - M56H - 177k - Rescued
      1999 V70 T5 - Emerald/Graphite - M56H - 119k - Garage Queen
      2000 V70 T5 - Mystic/Graphite - AW42 - 243k - Moms Unicorn
      2000 S70 GLT SE- Mystic/Graphite - AW42 - 218k - Sisters

    7. #5
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      Quote Originally Posted by ScottishBrick View Post
      Sounds like a misadjusted wastegate actuator. Set to 4.5 psi. On the 99 you could do a NA camshaft from ONLY a 99 NA, but there’s little reason the gain would be marginal. Better to spend $ on an intercooler and downpipe/exhaust.


      Sent from my iPhone using Tapatalk
      Yes, that’s an option as well. It would have to come from an early ‘99 NA without VVT.

      But I probably wouldn’t bother with that, you’re better off with the other things listed.


      Sent from my iPhone using Tapatalk
      2000 V70R Venetian Red/Charcoal M56 Swapped 195k
      2003 S60 2.4T Silver/Black 112k
      1991 944 Turbo B230FT/AW70 173k
      1992 245 some of a B230F/AW70 249k
      2007 XC90 V8 AWD Sport Titanium Grey/Black 165k
      Sold-
      1998 V70 GLT Black/Beige 193k
      1998 S90- Silver/Gray 207k
      1995 850 GLT Tropic Green... crushed
      1993 944 B230F/AW71L 221k
      2000 S70 GLT Silver/Taupe 253k
      2001 S60 2.4T Black/Black 230k
      1988 744 Turbo M46 Beige Metallic/Beige 188k

      Need used parts? PM me!

    8. #6
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      Sounds like great advice, thanks so much! As advised, I think I will skip the cam. Just to clarify, the 19t turbo will bolt on, needing no other modifications to work?
      Thanks again

    9. #7
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      Quote Originally Posted by Wpatterson View Post
      have a 99 c70 with under 70k miles. It has the 2.3 5cyl, 5 speed coupe. and has unimpressive performance. In the process of repairing an oil leak, I had to remove the cam covers. If I’m removing the can covers I figured I can easily change the cams for better performance. I want to get more power out of my 2.3 as economically as possible. 270 hp or so would be good. As a side note, power is ok as is, but only over 5k rpms. I also have a 2001 c7o (auto). Power is much more, and starts at a much lower rpm range.
      That said, I have a few questions. 1- is a cam upgrade a good way to go? If so, what would be a good source?
      2- is there an accurate on line source that I can read online(other than this forum)
      3- is there a better way to get the performance I am looking for? As in more power, earlier in the rpm range?
      Thanks so much!
      Agree with scottish to check if your wastegate is set correctly and you're building boost correctly.
      I feel like my C70 is quicker than my modded V70, (C70 is 5 spd and V70 is auto) so it sounds to me like something is off with yours.
      I recommend the Snabb high flow intake - can feel it spool up faster. The downpipe on my V70 did make it spool up faster, and it also has the high-flow intake (which also helped).
      If you have cam seals leaking you may have a PCV clog - it's known to blow the seals - but that low mileage at this age may just be brittle from non-use. May want to look into all the common upkeep items, too: sparks, fuel filter, etc... (Stage 0 as everyone around here calls it.)
      Good power to be made slapping a bigger turbo on and getting a tune. Most builds I've seen say 350-400 hp is achievable without changing out internals.
      2000 C70 HPT 5 spd; ~140k miles IPD high-flow air filter; Snaab high-flow Intake; Snaab short throw shifter.
      2004 V70 AWD ~155k 16T; Snaab high-flow intake; Snabb downpipe; ARD tune

    10. #8
      Member LloydDobler's Avatar
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      Quote Originally Posted by bmdubya1198 View Post
      If you want to make some more power, a good upgrade is a 19t turbo, green injectors, and a tune. upgraded exhaust (iPd, OBX, etc.), intercooler (Snabb or do88), and possibly a reverse intercooler piping kit for improved throttle response.
      For tuning, I recommend Hilton Tuning.
      This is exactly how my C70 is set up, with the addition of a limited slip diff. It is faster than most modded Rs in my local Volvo club, dynos at about 320 ft-lb of wheel torque, peaking around 3500 RPM. I never drive it and think "this isn't powerful enough". It's fantastic, and pretty much right at the peak of what the chassis can handle.
      2003 C70 T5M Convertible - Eibachs, Koni FSDs, Enkei RSF5s, OBX downpipe, Snabb intake, RIP kit, & drop-in intercooler, Quaife LSD, 19T, Green Giants, 22 psi Hilton tune.
      2006 V70 2.5T - Ice White - Oak Arena, (almost) bone stock daily driver.
      1966 122s - Collectible project, restoration and many mods on the way.
      2005 V50 T5 AWD - Daughter's first car. No mods unless she does 'em herself.

    11. #9
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      Quote Originally Posted by LloydDobler View Post
      Quote Originally Posted by bmdubya1198 View Post
      If you want to make some more power, a good upgrade is a 19t turbo, green injectors, and a tune. upgraded exhaust (iPd, OBX, etc.), intercooler (Snabb or do88), and possibly a reverse intercooler piping kit for improved throttle response.
      For tuning, I recommend Hilton Tuning.
      This is exactly how my C70 is set up, with the addition of a limited slip diff. It is faster than most modded Rs in my local Volvo club, dynos at about 320 ft-lb of wheel torque, peaking around 3500 RPM. I never drive it and think "this isn't powerful enough". It's fantastic, and pretty much right at the peak of what the chassis can handle.
      With all these upgrades have you needed to change the connecting rods, sleeve the block? I'm slowly getting into nodding out my C70 only thing crazy I have right now is the CCI from Viva deffinatly improved throttle response, sound, and mpg actually.

    12. #10
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      [QUOTE=ScottishBrick;7508531]Sounds like a misadjusted wastegate actuator. Set to 4.5 psi. On the 99 you could do a NA camshaft from ONLY a 99 NA, but there’s little reason the gain would be marginal. Better to spend $ on an intercooler and downpipe/exhaust.

      I've heared such arguments back and forth about the do88 intercooler, some saying it really improved the performance of the car and others say a rip kit with the stock intercooler and a tune is all you need calling the do88 intercooler useless and junk, what's your opinion?

    13. #11
      Member LloydDobler's Avatar
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      Quote Originally Posted by Ryandist33 View Post
      With all these upgrades have you needed to change the connecting rods, sleeve the block?
      Nope. This turbo is the perfect fit for a stock block, and the 2.3s are pretty tough.
      2003 C70 T5M Convertible - Eibachs, Koni FSDs, Enkei RSF5s, OBX downpipe, Snabb intake, RIP kit, & drop-in intercooler, Quaife LSD, 19T, Green Giants, 22 psi Hilton tune.
      2006 V70 2.5T - Ice White - Oak Arena, (almost) bone stock daily driver.
      1966 122s - Collectible project, restoration and many mods on the way.
      2005 V50 T5 AWD - Daughter's first car. No mods unless she does 'em herself.

    14. #12
      Senior Member ScottishBrick's Avatar
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      [QUOTE=Ryandist33;7638953]
      Quote Originally Posted by ScottishBrick View Post
      I've heared such arguments back and forth about the do88 intercooler, some saying it really improved the performance of the car and others say a rip kit with the stock intercooler and a tune is all you need calling the do88 intercooler useless and junk, what's your opinion?
      who the f said a do88 intercooler is useless and junk? That’s rubbish. Especially if you’ve ever seen one.

      The factory intercoolwr is tube and fin and barely an inch wide. The do88 is like 2,5” wide and bar and plate. It is THE performance mod. Efficiency is like 40% greater.

      The best way to describe an intercooler upgrade on a stock car is.....know how it’s quicker in the winter? Now it’ll be like that in the summer. And the winter is then insane.
      2003 V70 T5 - Mystic/Graphite - M56LK - 209k - K24/Greens/Do88/Quaife/SMF/P2R Clutch/DW300C/H&R/Bilstein TC/316mm & 308mm Brakes - SteveO Tuned
      1999 V70 T5 - Pewter/R Graphite & Alcantara - AW42 - 300k - Daily/Work Wagon
      1999 V70 T5 - Nautic/R Graphite & Alcantara - M56H - 177k - Rescued
      1999 V70 T5 - Emerald/Graphite - M56H - 119k - Garage Queen
      2000 V70 T5 - Mystic/Graphite - AW42 - 243k - Moms Unicorn
      2000 S70 GLT SE- Mystic/Graphite - AW42 - 218k - Sisters

    15. #13
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      who the f said a do88 intercooler is useless and junk? That’s rubbish. Especially if you’ve ever seen one.

      The factory intercoolwr is tube and fin and barely an inch wide. The do88 is like 2,5” wide and bar and plate. It is THE performance mod. Efficiency is like 40% greater.

      The best way to describe an intercooler upgrade on a stock car is.....know how it’s quicker in the winter? Now it’ll be like that in the summer. And the winter is then insane.[/QUOTE]

      I believe it was on Volvo speed I remember reading someone said don't waste your money, believe me it through me off, because like you said a larger intercooler allows more cooling which turbos love, I live in the Pacific Northwest, I believe this is one of the best climates for turbo cars since it's generally nice a cool year round.

      I guess me next question is that I have an aw50-42 tranny, I was thinking going manual with it (whenever I get a house/garage I hate renting) is the M56 worth it or should I play around with the M66, this car will be more street and track raced and brought to shows, to show off

    16. #14
      Member LloydDobler's Avatar
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      The chinese ebay intercoolers were a step up over stock and those are garbage compared to either do88 or Snabb.

      You might be thinking of the cold air intake, those are all only marginally better than the stock airbox and usually regarded as not worth the money.

      I like my m56, although I also liked my m66 in the R I had for a while. M56 will be easier to find and is a direct stock install, the m66 will require more customizing. There are no shortcomings to the m56 except maybe gearing, if you're trying to drag race it the automatic might actually be better.
      2003 C70 T5M Convertible - Eibachs, Koni FSDs, Enkei RSF5s, OBX downpipe, Snabb intake, RIP kit, & drop-in intercooler, Quaife LSD, 19T, Green Giants, 22 psi Hilton tune.
      2006 V70 2.5T - Ice White - Oak Arena, (almost) bone stock daily driver.
      1966 122s - Collectible project, restoration and many mods on the way.
      2005 V50 T5 AWD - Daughter's first car. No mods unless she does 'em herself.

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