R15 TS performance upgrades
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  1. #1
    Fellow Frogger! deja vu 25's Avatar
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    R15 TS performance upgrades

    Hi All,

    I have checked out the R15/17 register for info on doing mods to my R15TS engine and have found some bits and pieces, such as upgrading to a twin Webber etc.

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    I was wondering if anyone has done any head work, such as cam regrinds (do Wade Cams have any grinds available?), porting extractors etc?

    What about a small turbo? There doesn't seem to be many R15/17's with this option? Is there any reason?

    Is there any other source of technical info available on the net regarding these sorts of things?

    Thankyou in advance

    Luke
    Cheers - Luke

    1990 Renault 25 V6 Baccara - Gunmetal Grey
    1974 Renault 17TS (1317) - Silver

  2. #2
    1000+ Posts Europa's Avatar
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    Golly, where do we start! :-D
    '05 Pearl Black Mégane 5-Door LXR(Daily Driver), '75 Trak Yellow R16TSA (Parts Car), '74 Midnight Blue R17TS (Rebuilding), '73 457 Blue R17TL (Parts Car), '72 Alpine White R16TL (Retired), '69 Sunburst Brown R16TS (Awaiting Rebuild), '68 "Appliance White" Europa (Stored)

  3. #3
    Fellow Frogger!
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    Hi Luke,
    pehaps one question at a time??
    I'll chip in my 2 cents worth about the twin webers/ or dellortos though.

    I have just installed them on what is basically a standard motor (albeit a 1647cc one) and it makes a very noticeable difference. Obviously doing all the changes at once- cam grind, head work etc will reap even more benefits but the carbs alone- provided the motor is a strong one, will no doubt give you the taste for more power.

    If you are looking for advice re porting, etc etc, look up previous posts (save me repeating what others have already said), I have an R17 myself and have thrown ideas around (I'm always learning new stuff here) and some interesting discussions/options have surfaced. So have a search around in previous posts (less than a year back)and see what you can turn up.

    Cheers Ben

    ps there are also a number of posts/discussions regarding turbos on 15/17's if you are interested in such things try Ash - handle RENO17

  4. #4
    Simon's Avatar
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    I would say before making any drastic mods, over and above carby/cam changes, drive the 12/15/17 hard on a wet road. Then think of the light switch kick that a turbo will give over and above that.

    The fact that Renault themselves waited until they modified the front suspension of the 18 before the 18 Turbo was introduced would tend to indicate that even the factory considered the stock 12/15/17 front suspension unsuitable for turbo power. I feel that more productive modifications (along the well trodden lines of carbies and cams)can be made without going to all the hassle and potential unreliability of fitting a turbo.

    That's my three wheel nuts worth anyway!

    Simon
    1963 Renault R4 Van
    1964 Renault R4
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    1969 Renault 8 Gordini 1300
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  5. #5
    Fellow Frogger! deja vu 25's Avatar
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    Thanks Guys

    The info was great. I have checked past Froggy Forums and have found quite a bit on R15/17 engine upgrades.

    I think I will give the turbo a miss on the 15 for a while, and go the more accepted method of upgrade. ie dual webber, cam grind etc.

    Any mor info on the Webber change-over and a cam re-grind would be great

    Again thanks for the help

    Regards

    Luke
    Cheers - Luke

    1990 Renault 25 V6 Baccara - Gunmetal Grey
    1974 Renault 17TS (1317) - Silver

  6. #6
    1000+ Posts alan moore's Avatar
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    Depending on how wild you are willing to put up with will determine your cam choice. Cam grinds that suit 1600 pushrod Fords will work as they have the same size followers and rocker ratio of 1.5 to 1. With sidedrafts and comp. ratio higher than 9.8 something like 35/70 with 390 thou. lift at the valve will work OK. Big lift (440+) will have piston to valve clearance and cam life problems to overcome. Renault always went for much longer duration, shorter lift cams in their rally cars, but you have to rev them hard.
    17 TS 336 thou 40/72 degrees 7701452043
    1600 G Racing 358th 53/83 " 7700524884
    122 GT 350 thou 4200/6000 rpm Rally
    188 Racing 362 thou 4800/7000 rpm Circuit
    222 Racing 380 thou 5200/7500+ rpm cars under 1600 lbs. only . This is from the Renault Competition Guide and maybe they did have it all worked out.
    I have used 2litre Escort valves and collets and Datsun L series retainers in mine with springs that give 80 lb on the seat and 240lb on the nose with a 435 thou lift cam. I could go on, but my typing is too slow.Hope this is some help.

    Alan..
    '56 Renault 750 (16TS Power)
    '62 Renault Dauphine Gordini
    '89 Renault Alpine GTA V6 Turbo
    '08 Renault Megane sedan

  7. #7
    Fellow Frogger! Reno17's Avatar
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    Yea good call Simon

    Wonder what a R18T engine would be like in the back of a R8 ?

    tongue
    1967 1135 R8 Gordini
    2012 BMW One Series M Coupe

  8. #8
    Fellow Frogger! deja vu 25's Avatar
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    Thanks for the info Alan, that was very helpful.
    I presume you are running a R17TS engine?
    How does it perform with the Escort Valves and a 435 thou cam lift? Surely it must go well? Have you had it on a dyno?

    Thanks again, any more info will be greatly appreciated.

    Regards

    Luke
    Cheers - Luke

    1990 Renault 25 V6 Baccara - Gunmetal Grey
    1974 Renault 17TS (1317) - Silver

  9. #9
    1000+ Posts alan moore's Avatar
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    Hi Luke,
    I have had this motor in an R8 and a 15TS and currently putting it into a 4CV. Depending on the dyno it had 112 to 114 hp at the wheels and ran 14.6 on the quarter in the 8 with a steady start to avoid a broken gearbox (broke 13 times)
    Had only 40 mm Webers with 34 mm chokes F16 emulsions, 135 mains ,185 airs ,45 F8 idle jets.
    Idled very tame on sidedrafts, not good on downdraft. I only ran it to 7500 rpm, although I did run it to 8000 in top in the 8, a bit over 200kph, but it wasn't very stable. I believe a capacitor discharge ignition is a must for clean performance eg. MSD

    Alan.
    '56 Renault 750 (16TS Power)
    '62 Renault Dauphine Gordini
    '89 Renault Alpine GTA V6 Turbo
    '08 Renault Megane sedan

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