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355 How to gain alil more hp on f355?

Discussion in '348/355' started by Filippo7673, Oct 27, 2019.

  1. INTMD8

    INTMD8 F1 Veteran
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    ^ Yes that's what I work with primarily (LS engines, or LT now).

    Based on the graphs there is a good high rpm gain at the expense of torque, but that's how it usually works out.

    That would equal better acceleration driven in anger but it pushes the peak rpm up so high you would need a raised rev limiter to get the most out of it. (and it's been mentioned by Rifledriver in the past that the connecting rods and timing belts may not appreciate that)

    I have no issues with hydro lifters either but don't think solids would be that big of a problem considering the engine will be out every 5 years (or whatever) anyway.

    :)
     
  2. Tifosi Dude

    Tifosi Dude Karting

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    I thought he mentioned that the belt life is greatly decreased. I don't think connecting rods are the weak link, they are made of titanium after all.
     
  3. jeffdavison

    jeffdavison Formula 3
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  4. Tifosi Dude

    Tifosi Dude Karting

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  5. Ferrarium

    Ferrarium Formula 3
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    as lang as were removing motors why not a 600whp subaru motor you'll have lots of room too work. A Subarrari.

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  6. SoCal1

    SoCal1 F1 Veteran
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    Funny you bring that up. While at a desert track last year a famous subi driver asked me how much was I overheating on the track that day. Told him I was up to at normal operating temps and I was set up to run marathons in 105 degree weather. Totally blew his mind as he said he was overheating after a few laps.
    The desert will break everyone :)
     
  7. kenneyd

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  8. Ferrarium

    Ferrarium Formula 3
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    It was a bit more than just an intake though to be fair...

    Engine swapping a ferrari is odd what makes it a ferrari is the engine. It seems to make more sense to put a ferrari engine in a golf.

    But different stokes for different folks some just like the challenge in which case it makes sense, its the journey not the destination I imagine.

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  9. Jackie and bill

    Jackie and bill Formula Junior

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    Not a golf, but I would like this creation :)
     
  10. INTMD8

    INTMD8 F1 Veteran
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    Don't think there's much to do there with ITB's and velocity stacks.

    Of course you could do some experimentation but looks like a very nice setup from the factory.
     
  11. Carmellini

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    +25 HP claim and suppose to end CEL for those with CAT delete/bypass pipes?

    is there anyone that has gone for this 2k upgrade? Bueller.....Bueller.....
     
  12. rick canton

    rick canton Rookie
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    I have been lurking for quite a long time. It seems like you have said what has been done to JVBs car. I am looking to buy a entry level car but I would like to make it fast. I have money saved to buy. I am an electrician and I am just about to buy. I dont mind doing the hard work to make it fast and I have the time.
     
  13. ShineKen

    ShineKen F1 Veteran
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    Jon Von Bon (aka Rick Canton) has stooped to a new low. All credibility lost?
     
  14. BOKE

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    Are you referring to the artist formally known as @Nikki Sixx???
     

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  15. taz355

    taz355 F1 Veteran
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    I think Bob all ready answered this. All the things he did gave about 40hp. My guess and Bob please correct if I am out to lunch but in my experience from what I have done is about this
    Exhaust and intake add 20hp. Porting 2, fueling and tuning maybe 1 to 2 but better drive ability , timing 2, freshen up engine 4, lighter wheels 2, colder air intake 2 vs the 5.2 warmer air, I might be missing a few.
    If your James size this won’t work but if your my size dropping 50lbs adds lots. Ha ha
     
  16. kenneyd

    kenneyd Formula 3
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    Did Bob post flow numbers from the heads?
    Different motors obviously, but on sbc's heads and cam make the biggest difference by far
     
  17. F355Bob

    F355Bob Formula 3


    The new owner has the flow figures but they were significant. I think what gets missed is yes you gain 40 rwhp at the max but you gain that and more all along the torque curve and power band. The car drives completely different went you have more midrange and low end power. Torque comes in at lower rpm.
    Throttle response in infinitely better. When people say the 355 is dead below 5000rpm these mods change that. Being in the right gear is not as important when you have more power all along the power band. Max numbers do not tell the whole story.
     
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  18. Four7EightBHP

    Four7EightBHP Formula Junior
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    Yes on the torque. It would be good to see the new torque curve. Torque gets you there and horsepower keeps you there. It's why the Audi diesel was so dominant.
     
  19. Carmellini

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    surely someone has tried the Fabspeed ECU ExperTune software?? anyone....???? +25 HP and no more CEL is using CAT deletes; sounds like a deal
     
  20. INTMD8

    INTMD8 F1 Veteran
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    ^ I would be very surprised to see someone test that at a 25hp gain but only one way to find out.
     
  21. SoCal1

    SoCal1 F1 Veteran
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    I agree 1000% not going to happen with the 5.2. Had those suckers wide open. Only a few things to change short of a complete makeover that wont cause issues.
    Here is the CC460 chip I pulled out of the ECU and had my way with. :)
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  22. Carmellini

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    not sure I understand?
     

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