From what I've read, the LS2 and the LS6 intakes are virtually identical in performance and either could be bolted on to an LS1 engine. I have a couple of quick questions.
1. Is it true that both will go on the LS1?
2. If #1 is true, then is the primary difference the fact that the LS6 intake uses the 3 bolt throttle body and the LS2 uses the larger 4 bolt throttle body?
3. If #2 is true, then the logical conclusion is that you'd want to use an LS2 intake to allow the use of say, the 90mm LS2 throttle body on an LS1. Yes? No?
Thanks

 

what you read is wrong, LS2 intake is a dog!

you want an LS6 intake or go with a FAST intake

 

Appreciate the reply. Indeed, I already have a FAST 102 for my upcoming engine mods. Not going to be using either the LS2 or the LS6. My question was generic. I'd seen someone ask earlier about using an LS2 and the response was the there would be very little difference if they already had an LS6 intake. If replacing the LS1 intake though, it would be an increase in performance. Therefore, following that reasoning, I guessed that the LS2 and LS6 were similar in performance with the difference being the 3 bolt or 4 bolt throttle bodies. Thanks for helping out.

 

The FAST 102 has issues with fitting on a C5. You will need new fuel rails, and shim the cradle to allow for extra clearances needed. You also should use a Nick Williams 102 TB to get the most out of it. It adds up to a lot of money. Some have said that the FAST102 on a stock cube C5 is not worth it at all with all the extra parts/work needed. Do your homework on this intake before you purchase and find out you need a lot more parts to make it work.

http://forums.corvetteforum.com/c5-t...102-on-c5.html

The FAST 92 might be a better option. FAST brought the 92 back after so many complaints from C5 owners. I emailed FAST directly myself and pointed them to the above post which they told me they had not seen before. The FAST92 is more of a bolt on part, where the FAST 102 is not. I got a brand new stock 90mm LS2 TB off Amazon for $201 shipped too. Easy peasy !

I have a full procedure on my install if your curious to do it yourself on my web site below.
www.ToqueZ06.com

Hope this helps.
Toque

 

^^
Thats not 100% accurate. Mine fit just fine, no need to shim anything. All i had to ro was grind a bit of material from the top of the water pump to clear the 102tb but as for the intake, it fit just fine. If youre gonna spend the money might as well go 102. Before paying for a 92 you might as well have a ported LS6.

 

Mark, thanks. I've read your website many times. Love your Vette and HIGHLY respect your advice and knowledge. If/when I have a problem or issue, I typically go to the forum and your site to see if the fix is there and you've helped out many more times than you can know. I have researched the FAST 102 vs 92 a ton. I know what the possibilities of fitment issues are and ended up going with the FAST 102 for one reason and one reason only... (well, I got a really good deal too!) More HP... Have seen several studies and the 102 will simply make more HP. I was able to pick up a ported 102 for $800 which is as good or better price than any 92s that I've seen. I have a set of brand new LS2 fuel rails and injectors that I'll be using on it. I have a ported LS2 tb going on it. I'll be running a big cam and new PP 243 heads, milled to 11:1 compression. New dual springs, trunions, new headers, xpipe, whole enchilada.... While engine is apart, will be using some new shorter motor mounts from Hinson to alleviate the clearance issue and my current mounts are a little mushy anyway. The 98 has 119K on it right now and some of these parts need replacing anyway. I've been waiting a long time for this and I'm going to do what it takes, even if it costs a few more $$. Your advice is not lightly put away. If I could find someone willing to trade a ported 92 for my ported 102, I might do that but I haven't seen any good prices on the 92 anywhere. New 92s for $850 but not ported which would cost another $150-ish (?).... Thank you very much for chipping in. And tell Ed to quit studying so much... Oh, and C5Natie, I picked up an LS2 water pump which does not have the bump that needs grinding down. Just bolt it on and no clearance issues with the LS2 TB.

 

Sounds like you are on the right track, However my choice on the FAST 92mm intake was from a few dynos I have seen that showed it gave the best gains on a stock cube LS1. The 102 was overkill from what I gathered. Also according to TPiS, the 102 loses on the low end and is meant for upwards of 500whp. The 92mm keeps all low end as well as flowing more than enough for a heads and cam LS1/6 car.

I think both are a great choice though. Just wanted to point out that more flow does not mean more power in allot of cases. Velocity must be maintained to keep torque. Thats why you dont see heads offered for the LS1 with as big of intake and exhaust runner volume etc. as for a larger displacement engine. Just my two cents.

 

Cactus

I'm glad to hear your doing your homework on this. Many people just jump in and buy parts without understanding what "other" parts and or labor might be involved. Having ALL the information laid out in front of you is the BEST way to approach performing mods on our cars.

I'm glad my web site has helped you out here and there. I try to give back to the forum as much as I can.

Your right... Ed does study too much. I hope it pays off for him, but I'm sure it will !

Toque