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Old 03-01-17, 06:55 AM   #11
tylerlieberman
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Default Re: engine mods for low-end torque

A low compression 2.5 liter will not have torque before the turbo starts cramming air into it.[/QUOTE]

This^

You could switch to a twin-scroll setup, which would cost a bit of money and maybe yield a couple hundred RPMs of response/spool. But at the end of the day, you need to be in the rev range where the turbo is working efficiently to feel any power.

Also mentioned, alternative fuels can help too.
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Old 03-02-17, 03:23 AM   #12
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Smile Re: engine mods for low-end torque

maybe i should have asked my question this way:

If I get some stronger pistons with slightly higher compression and mods needed to support them like head studs etc, would I then see the torque curve start to rise a little sooner? or have the tune start to bring on torque sooner safely?

this thread went the direction of I wanted a low-end V-8 like torque monster and I knew I couldn't get that all ready. Just want to know what is a wise approach to maximize what low-end is available.

obviously I need to try to find where some E-85 is available


thanks again for any info
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Old 03-02-17, 05:09 AM   #13
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Default Re: engine mods for low-end torque

Get a super small turbo or go hybrid supercharged turbocharged.

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Old 03-02-17, 07:32 AM   #14
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Default Re: engine mods for low-end torque

Quote:
Originally Posted by '12STi70 View Post
maybe i should have asked my question this way:

If I get some stronger pistons with slightly higher compression and mods needed to support them like head studs etc, would I then see the torque curve start to rise a little sooner? or have the tune start to bring on torque sooner safely? . . .
obviously I need to try to find where some E-85 is available

Is it possible? Yes. see the above post. Your aren't going to get a lot of power in any form out of small turbocharged 4 cylinder engine until the turbo spools. The diretion the thread took was appropriate because of this. The ideas in the above post will help get the turbo to spool earlier - as would higher compression or alternative fuels.

Also safely is safely a key word. Increasing torque at the very low end is not safe - at least not without a non-stock bottom end - and that you really wont get much improvement until you have boost.

I wrote more and deleted it. It's already been said - by me and everyone else. If you crave low end torque change platform. If you power including torque from 3500 up, just follow what others have done.
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Old 03-02-17, 10:06 AM   #15
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Default Re: engine mods for low-end torque

Quote:
Originally Posted by '12STi70 View Post
maybe i should have asked my question this way:

If I get some stronger pistons with slightly higher compression and mods needed to support them like head studs etc, would I then see the torque curve start to rise a little sooner? or have the tune start to bring on torque sooner safely?
Sure, you would gain torque down low, and elsewhere. For a given fuel (pump gas or E85) you would limit your high end power potential because you wouldn't be able to run as much boost.

I have read about people who put 9:1 pistons in, and the reviews and results were positive.
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Old 03-02-17, 10:26 AM   #16
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Default Re: engine mods for low-end torque

You can still make high end power with high compression, you just need proper fuel to do so. The fastest Taurus SHO is running 12.5:1 compression pistons on E85.
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Old 03-02-17, 01:16 PM   #17
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Default Re: engine mods for low-end torque

Think this is what you're looking for
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Old 03-02-17, 02:57 PM   #18
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Default Re: engine mods for low-end torque

talked with my builder today. For a bottom end rebuild to SAFELY build early torque they wanted a HUGE amount of $.

So awaiting a quote for their flex-fuel kit, ELH and up-pipe.

Thanks for the info everybody
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Old 03-02-17, 04:24 PM   #19
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Default Re: engine mods for low-end torque

Another approach would be to lighten up as much rotating mass as possible in an effort to get into the powerband faster. The gearing in these cars is so short it's really pretty easy to stay above boost threshhold if you're trying.
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Old 03-06-17, 07:19 AM   #20
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Default Re: engine mods for low-end torque

The ELH is well worth it for the low end torque you are looking for.
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