Opinions! TPIS 90mm LS6 int. or port stock TB
03-27-2013, 11:38 PM
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Opinions! TPIS 90mm LS6 int. or port stock TB Ok, so here's the deal that I need some opinions on. I have a LS1 TB with a LS6 intake (installed brand new LS6 intake 9 months ago). I also, however, have a brand new, never used, 90MM Holley TB that I bought 6 years ago but never used. I have two options.
1. Sell the Holley TB, send out the stock TB for P/P and keep the stock LS6 intake as is.
-or-
2. Send out the LS6 intake to TPIS for the 90mm conversion, install the Holley TB and sell the stock LS1 throttle body.
For a list of my mods, see my sig. Keep in mind, either way I go I will be getting it professionally tuned in a few weeks as its on a mail order tune right now. With that said, in your opinion, should I choose 1 or 2 and why? Thanks everyone!
1. Sell the Holley TB, send out the stock TB for P/P and keep the stock LS6 intake as is.
-or-
2. Send out the LS6 intake to TPIS for the 90mm conversion, install the Holley TB and sell the stock LS1 throttle body.
For a list of my mods, see my sig. Keep in mind, either way I go I will be getting it professionally tuned in a few weeks as its on a mail order tune right now. With that said, in your opinion, should I choose 1 or 2 and why? Thanks everyone!
03-28-2013, 10:47 PM
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I'm not sold on the FAST intakes. They are ungodly expensive for maybe 2-5 more horsepower over a modified LS6. I might be able to pick up a used FAST for.. $650, if I'm lucky. But oh yeah, don't forget you can't use stock LS1/LS6 fuel rails with it. So tack on another $200. The TPIS is $350.. so $390 after shipping both ways. The FAST would be $900-$1100 after shipping. So pay an extra $500-$700 for maybe 4 more HP over a TPIS. That's an expensive 4 ponies...
Plus with the setup I have, I make my power between 2200-6500RPM at which point the trans shifts. FAST's generally make their power in the higher RPM band, usually 6400RPM-7000, Which my motor will never see anyway. In my opinion, FAST is a great intake for a race engine and is designed for peak numbers. But it's not so great for a street engine that is used on a daily basis and designed for making better average power in the real world RPM range. But hey that's just me.
Plus with the setup I have, I make my power between 2200-6500RPM at which point the trans shifts. FAST's generally make their power in the higher RPM band, usually 6400RPM-7000, Which my motor will never see anyway. In my opinion, FAST is a great intake for a race engine and is designed for peak numbers. But it's not so great for a street engine that is used on a daily basis and designed for making better average power in the real world RPM range. But hey that's just me.
03-30-2013, 12:39 PM
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I think I'm going to do option 1 and save some cash. It would be under 200 to port my stock TB with shipping both ways included. Maybe I'll upgrade to a FAST intake if I get a 383 short block in a few years. A FAST is a bit too much to shell out right now for just a H/C stock 346 LS1 right now I think. Thanks for the tips though!
