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Thread: High compression NA DOHC motor swap to a TWIN TURBO car...

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    No BS Feedback Score 0 hotGTO's Avatar
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    High compression NA DOHC motor swap to a TWIN TURBO car...

    What are all the possible negative consequences of swapping the high compression NA motor into a TT car, and what could be done to avoid any possible negative side effects? Are there any possible positive outcomes from doing it?
    Dave


    91 Stealth TT- Pampena Stage 2 short block, rebuilt heads, Solid mounts, MBC, Vac reduc, hotwired, Blitz FATT, 4.5" FIPK, TurboXS BOV, Stainless Downpipe, Race pipe, Borla exhaust, AHDS, 500 lb clutch, JDM 25 spline 5 spd/tcase, Short Shifter, EVO leather knob, 18" Mazdaspeed wheels, Front Splitter, in dash touch screen bluetooth/navigation/DVD...

    94 3000GT DOHC - Nitrous express proton series w/ upgraded solenoids, dash mounted datalogger, in dash touch screen navi w/bluetooth, IPT end clutch, high performance trans cooler, Translab shift kit. SOLD

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    Now with more poop-smear Not Verified Feedback Score 8 (100%) IPD's Avatar
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    deathsled has done it. just make sure you re-tune it & you'll be fine.

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    1st ever COTM and COTY verified Feedback Score 9 (100%) green-lantern's Avatar
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    Negative, you can't run high boost

    Positive, you get more power than the 8:1 engines would at low boost.

    Negative side effects, You turn the boost up too high and blow the engine.

    Positive outcome, You keep the boost low and get some good power out of stock turbos running about 8psi.

    I've ran turbos on 10:1 NA engine and it's a lot of fun. The power is great down low and it always comes to life instantly. Of course you will be able to get more power out of an 8:1 TT engine by running more boost but if you're happy with modest power with great response there is nothing wrong with it.

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    My TT is currently running an N/A block at 10:1 and as long as the tune it good you won't have any issues. I'm currently running at 9-10psi and she runs strong as hell with no knock. I just installed a meth kit which should allow me to turn up the boost to 14-15 psi.

    All I have to tune with is an SAFC2 and it only needed minor adjustments in certain rpm ranges.

    Just make sure the N/A block is solid and it will handle the boost. Don't go crazy and tune slowly and safely.

    Check it out on Youtube!!


    93 Stealth TT - The Stealth Project

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