TVS without e85 or meth - Saturn ION RedLine Forums
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post #1 of 22 (permalink) Old 03-04-2018, 01:06 PM Thread Starter
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TVS without e85 or meth

I'm looking at upgrading to a used TVS 1320. I currently have opt b, dual pass, phenolic spacer, fmhe, header, downpipe, trans mounts. I realize that running a full cat back would be beneficial but wanted to see where I went with the car before upgrading that.

I don't have access to E85. I run 91 because it's the most abundant, there is 94 but not at most gas stations. Currently I do not run methanol injection either.

Ive read a lot of mixed reviews about tvs. Would it still be beneficial to run a TVS 1320? Would it make much more power than an m62 with a 2.9, or a 2.9 with meth?

I'd like to eventually land in the 300-320 whp area. Not interested in going turbo.
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post #2 of 22 (permalink) Old 03-04-2018, 01:44 PM
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The TV'S will get you to 300 with a 3.0 pulley and head and cam work getting a full exhaust would be better then just a cat back.. but be prepared for your exhaust to be significantly louder no matter what modifications you make..
The m62 is really inefficient with a 2.9 pulley and if your considering a TVS i wouldn't think of doing anything with the m62..

Water/meth is for running hard pulls really... helps with keeping temps down so you can keep your timing advanced and with a slight octane boost..
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post #3 of 22 (permalink) Old 03-04-2018, 03:19 PM
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Should be fine to get in the neighborhood of 300 on 94 alone. You'll need a good tune and a way to monitor knock.

Every cooling mod should be on the car, and plugs should be gapped to 0.032.

Exhaust work should be done from the head back. Catback is the least restriction. And oh yes, it will be loud and nasty.

Best exhaust mod on an LSJ is a turbo.

ETA: The M62 is less efficient than a TVS, even on stock pulley. Anything less than a 3.0 is has diminishing returns on a M62 due to charge heating.

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Last edited by Rebel Redline; 03-04-2018 at 03:23 PM.
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post #4 of 22 (permalink) Old 03-04-2018, 07:23 PM Thread Starter
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My understanding is that head and exhaust work can be done after installing the TVS, you just wouldn't get the full potential of TVS until it's done. Correct?
If a TVS has run a smaller pulley (2.7") would you be concerned?
The current owner is also unsure if methanol has been run through it. Ive read mixed reviews about the effect of meth on bearings and rotors. Is that something to be concerned about?
The reason I'm asking is that I won't be able to see the supercharger prior to purchasing, it would have be shipped.
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post #5 of 22 (permalink) Old 03-04-2018, 07:43 PM Thread Starter
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Would running the TVS without a full exhaust and head work put excessive strain on the engine?
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post #6 of 22 (permalink) Old 03-04-2018, 07:59 PM
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You can always just pulley up from the 2.7 until you're ready.

From what I read when coming to the decision to go turbo, the TVS shines the most when the car has a ported head, cams, header/downpipe, and of course E85.

Now on a 3.1 or 2.9 pulley, the car will still be stout, but you'll be limited on how much timing you can run by your fuel. More timing = more power. From what I've seen, TVS cars make the most power by dropping pulley size and revving high. Keep in mind however, that any supercharger is a parasitic drag, and the air-to-water aftercooler is no match for a air-to-air intercooler and a turbo when it comes to charge temps. Efficiency is the name of the game.

As far as exhaust, I'd at least go mid-length header/downpipe if not long tube. The catback can stay stock for now. I didn't see any dyno proven gain when I swapped from the stocker to the ZZP 2.5" catback. Also, one of the highest horsepower TVS cars had a 2.5" exhaust for a while. You don't need a sewer pipe with a supercharger like you do with a turbo.
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post #7 of 22 (permalink) Old 03-04-2018, 10:24 PM Thread Starter
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Ya, I currently have all of the cooling mods, and a ceramic coated midlength header and a downpipe.
Thats basically the info that i foubd too. I appreciate the info, it's hard to find good info because there are lot of mixed opinions in the archives on the forum.
The owner said that the TVS now has a 3", but I've heard that 2.7" can over spin the blower. Do you have any knowledge about that?
I've also been trying to pick through the forums to figure out if meth ruins rotors and bearings.
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post #8 of 22 (permalink) Old 03-04-2018, 10:29 PM Thread Starter
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This blower previously had a 2.7" but he doesn't know how long it was run for or if methanol was run through it because it was before he owned it.
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post #9 of 22 (permalink) Old 03-05-2018, 01:21 AM
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Running meth has been said to ruin engines and it really depends on a lot of factors.. the ecotec engine block is mostly aluminum and a lot of the components in the supercharger are aluminium as well.. when your using meth its actually a mixture of water and methanol... it's the water that will cause corrosion over time but aluminum is resistant to it... there have been many people in this forum that run meth and i haven't seen any negative posts about using it...

With your concerns about the 2,7 pulley on the m62 you should be fine but that really depends on the tune that the car currently has...

If your looking for really good info on comparisons between the m62 and TVS and accompanying mods GMredline did a lot of write ups about his car with dyno results... I will try to dig thru the forums later and post a link in this thread
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post #10 of 22 (permalink) Old 03-05-2018, 06:45 AM
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As far as overspinning the blower, people do that on the M62 with any pulley smaller than a 2.8. It happens for a few seconds at a time, and I've never seen any data that says it hurts them.

Now sustained operation at 7,000 rpm... that's another story. Yeah, don't do that.

The main concern with methanol is whether or not it was sprayed pre-blower. The water/methanol mixture can supposedly strip the rotors of their coating. I haven't seen any conclusive data to show whether or not it does so.

If you have any concerns, you can always send the blower off and have it rebuilt before install.
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