Torqhead setup - is it worth it? - Chevy Impala SS Forum
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post #1 of 55 (permalink) Old 05-01-2019, 09:18 AM Thread Starter
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Torqhead setup - is it worth it?

I've been happy for the most part at how the old Opti and Ignition have performed over the years on the LT1/L99 setup. I was recently looking at the setup from Torqhead....

https://www.torqhead.com/index.html

and also a series of Video's on the Swap this guy did.....


While it seems like a slick setup that a lot of time and effort went into designing, I'm just wondering if it's really worth the $1600+ investment.

With other options like fine tuning your original LT1/Opti/PCM setup or even going to a full blown LS swap, is this worth the effort/cost and if you did the Swap how do you like it??

Soooo, is there anyone here who has done this conversion and if so what are your thoughts on this setup and was it worth your investment OR just thoughts in general??

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post #2 of 55 (permalink) Old 05-01-2019, 10:11 AM
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I'm going with TH on my build. The 411 PCM is just SOOOOO much faster than the LTx computer and allows for a lot more fine tuning since it can read sensors so much faster. My end goal with mine is to open me up to more tuning options. Here in Arizona, we have some of the best tuners, but they all tune the LS platform, so going with TH allows me to use their services.

As for whether it is worth in on a bolt on car? I'm not so sure on that. A solid running Opti setup is probably more than sufficient.

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post #3 of 55 (permalink) Old 05-01-2019, 11:04 AM
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I've gone back and forth on the TH setup ever since it hit the market. I know my engine can make use of it and will perform better, but I just don't think its a priority purchase until I'm literally out of stuff to spend my $ on with this car. Its a "cool to have" thing and not a "must have" thing for me given that my car is a DD and not a race car. I also do not like that you are beholden to a boutique PCM that's only available from a single manufacturer.

They do look cool as hell though....
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post #4 of 55 (permalink) Old 05-01-2019, 11:54 AM
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I can't say much about this but I think KW has it on one of his cars. I would wait for him to weigh in with his informed opinion. It might help you with a go/no go.

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post #5 of 55 (permalink) Old 05-01-2019, 07:20 PM
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Quote:
Originally Posted by 4DoorSS View Post
…..I was recently looking at the setup from Torqhead...…...While it seems like a slick setup that a lot of time and effort went into designing, I'm just wondering if it's really worth the $1600+ investment.

With other options like fine tuning your original LT1/Opti/PCM setup or even going to a full blown LS swap, is this worth the effort/cost and if you did the Swap how do you like it??

Soooo, is there anyone here who has done this conversion and if so what are your thoughts on this setup and was it worth your investment OR just thoughts in general??
Quote:
Originally Posted by gbhs72 View Post
I can't say much about this but I think KW has it on one of his cars. I would wait for him to weigh in with his informed opinion. It might help you with a go/no go.

Mark: Snowman-33
From all that I read, you cannot expect more than 10-15 HP/TQ at the wheels with the TorqHead….BUT….you'll have this increase virtually every point through the entire power curve versus an 'opti' engine. I found this to pretty much be the case.

That said.....the TorqHead will allow you to cleanly spin the engine to whatever RPM limit that your engine has the capability of spinning to. No crazy high RPM misfires, no 6900 (or so) PCM induced RPM limitations since the kit uses a modified LS2 ECM.

If I were just tooling around town at 40 mph, two days out of the week.....or had a near stock set-up, I would've passed on the kit.

But I have a stroked LTx with a fairly aggressive solid roller valve train....and I ALWAYS drive 'spiritedly' and race it occasionally. SO FOR ME…..it was worth it.

Best of luck with whatever you do!

KW

1996 BBB SS, 398ci Solid Roller LT4, TorqHead 24x Conversion


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post #6 of 55 (permalink) Old 05-01-2019, 11:07 PM
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So I don't have torqhead and I have not tuned an LS (though I've seen HPTuners and the 411 PCM is indeed very powerful). But I have tuned a number of LT1s and the gifted enthusiasts who have developed eehack and the $EE definition in TunerPro have really opened up a lot of abilities with the stock '94-95 LT1 PCM including built-in wideband support, real-time spark and fuel adjustment, and adjustable injection timing which can help cure low rpm closed loop fueling instability.

The other challenge is that you most likely have to learn how to tune it yourself since tuners don't want to mess with non-LS stuff. That said, if you can read, do basic wiring and are familiar with Microsoft Excel, you can tune.

If I was running high-rpm or forced induction, I would definitely move away from the stock 94-95 LT1 PCM. Forced induction can be done using the half-MAF trick but it's still a band-aid. The LT1 does run out of MAF resolution headroom over 475hp or so, just based on my own tuning experience. Again, there's ways around it, but that is a capability limit.

For a normally aspirated street car that doesn't see high rpm, I think you could better spend $1600 elsewhere.

"The unexamined life is not worth living." - Socrates

Last edited by sherlock9c1; 05-06-2019 at 07:58 AM.
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post #7 of 55 (permalink) Old 05-01-2019, 11:36 PM
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I believe either 24x conversion is worth it.
If you can build/modify your own harness save yourself a boatload of $.
But good tuning is expensive if you have to pay someone to have it done.
I don't believe in mail order tunes or one size fits all tunes.
Every engine runs a little different even if same specs.

I bought the EFIconnection kit, and can do harness/tuning myself.
Personally I'd never pay for the full TH kit, but I'm a cheapass, and enjoy doing things myself.
I went with EFIConnection because parts are internal, not 100% sold on having sensors hanging on front of engine.
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post #8 of 55 (permalink) Old 05-02-2019, 08:24 AM
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Quote:
Originally Posted by FaSSt9602 View Post
I'm going with TH on my build. The 411 PCM is just SOOOOO much faster than the LTx computer and allows for a lot more fine tuning since it can read sensors so much faster. My end goal with mine is to open me up to more tuning options. Here in Arizona, we have some of the best tuners, but they all tune the LS platform, so going with TH allows me to use their services..
That's interesting to read about the use of the 411 PCM. That PCM is also used on an upgrade for my year and model of Tahoe ('98). I'm not sure what makes that PCM a choice for an upgrade over stock, but it's something the truck forum guys do too.

Also regarding tuning, I'm pretty sure with that PCM you can get yourself into an HP Tuners dongle from what I understand, and then play around with the programming on your own. They've got a good forum as well.

That's what I've been doing with my Tahoe since I completed an engine rebuild. I found a JET (P/N: 14005) tuning hardware on eBay for CHEAP last month, and have been doing little changes here-and-there above and beyond what I initially had Bryan Herter do at his house one weekend about 10 years ago.

It's truly AMAZING as to the possibilities of what's available to tweak in the Truck (As well as the Caprice) PCM. For example, I can increase the alternator output, which I did, from 550-1,000RPM since I have stereo installed. I can also modify the output/display for the fuel gauge. There's some cool stuff beside engine and transmission tables too!

Okay, back to the 411 PCM.....

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post #9 of 55 (permalink) Old 05-02-2019, 08:50 AM
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Quote:
Originally Posted by atlantadan View Post
I also do not like that you are beholden to a boutique PCM that's only available from a single manufacturer.
This is the biggest drawback as well as the custom made cam/crank sensor.
The 24x system from EFIconnection is a lot cleaner and uses all factory parts.

Nab
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post #10 of 55 (permalink) Old 05-02-2019, 10:14 AM
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Hey i just picked up my TH kit today and i went with the basic kit it was about $900usd i have to make my own brakits and get my own coils. I had some coils from my 03 2500 thatvim going to scrap so i saved some money. After talk to the guys at TH i think its a great mod to do if you have work done to the car. I think to see and feel the difference you would need more then just bolt ons. Also the TH guys willl telll you whats the best kit for you and if you dont need some parts they dont try and sell you extra ****, justvto make money off you.Put that just my 2cents.
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