found some other results here digging around for info on this intake. Here is a comparison from Lingenfelter on a LS7 427 shortblock with 12:1 compression with the 65 cc chamber Edelbrock heads. First one is a ported LS2 vs a FAST 90 and the second one is the Ported LS2 vs the TPIS 90MM LS6.



SO 4HP and 2FT LBS TQ difference???

 

If I remember right, the LS6 is suppose to be better than the LS2. I wonder how close the ported LS2 flows compared to a stock LS6.


I figured being on a 427 the intake would have more of a gain. I'd be interested to see the comparison on a 346. I guess GM did do a pretty good job making the LS6 intake.

 

^^^^ good question. I was wondering the same thing . what we need to see is a stock LS6 V.S. a TPIS Modded one. I don't think it would be hard to make a 90 LS6 at home just need a LS2 mani and a LS6 one to cut up on.

 

wow the tpis did pretty good.

 

Exactly. I want to see a stock LS6 compared to the 90mm LS6. Screw the LS2 intake, I read somewhere that it sucked and was one of GM's worst designs. It's the LS1 intakes retarded cousin or something similar.

 

haha dude, i was just using that for comparisons sake next to a fast. Disregard WHAT intake it is and look at the diff. between the fast gains and the tpis. Not a whole lot.

 

heh....no, I wasn't dissing your post. I appreciate you posting it. It does show this little hopped up LS6 can hold it's own if you can believe dyno graphs. I put my order in and shipping mine off tomorrow for the upgrade. I only wish I would have done another dyno run since I last did my heads and cam to get a comparison. Oh well, once I swap in a Polluter cam in a few months, I'm hoping to be close to 450 hp in the end and that will be just fine with me for a nice street ride.

 

This is kinda off subject but does anyone have the part numbers to tell between buying a ls6 and a early ls1 intake off a vette w no egr?

 

Thats very true....the actual LS6 plenum is designed damn good....and it performs great once the they mod the LS6 to except a 90mm TB. Theres no bottom end tq missing and it rocks in the mid-range right on up!!! If i didn't install one myself and experience the increase i wouldn't think the TPIS intake would have made that much of a difference. But it does. I saw the comparo as well...they did it on a 427 and the Fast made only a few hp over the TPIS/Lingenfelter. And it only cost $350 for the mod if you dont mind sending in your intake, that way theres no core charge Great value and nice jump in power at a much better cost.

 

Anyone have airflow numbers for an intake with the TPIS 90 mod to compare to a regular LS6 intake & ported stock TB?

It would be really cool to see some flow bench data on this too.

 

for the 90mm snout, which tb would you guys go with?
does any here have this particular one that can take pics of it?
i tried googleing their website, but..no luck. (nevermind, found it!)

thanks!

 

Well i looked into making one at home too and i guess its almost impossible to fuse it together but i talked to TPIS and the **** they used is like $3,000 a quart probly some special mix **** we will never know how to get our hands on

 

guys, I have pictures from another member on here. I will upload them in a second here. They are the same ones from earlier in the thread, but bigger versions.

 

Pics would be awsome of TPIS intake!!!!!

 

 

yeah, that's a better size pic. thanks!
this is for the oval one.
wonder if anyone has the 90mm snout.

 

Nice pics does it look like they just used a new snout or is it a new snout and new tube behind it till it hits the actuall intake?

O ya wonder how hard it would be to make your own throttle body instead of buying one?

 

very hard. Would need access to autocad, and a cnc machine, let alone trying to fit the butterfly and arm, push in the bearings, etc. Lots of work.

 

Well guys i just bought a LS2 intake yesterday and i am goin to put it up against the tpis ls6 some how i am goin to port the ls2 just a bit to get it smooth and goin to hunt down the cheapest ls6 i can find and in march have tpis do the 90mm hhope fully i can use the same 4 bolt TB for both (i am goin to call and find out tomarrow) I can snag the dyno from school and tune the can in w the ls2 annd pull it off and tune it back in with the ls6 90mm and get you guys the results.......On TPIS web site the LS2 performed Like the LS6 90mm did on there site comparison on page 2 on this thread:
https://ls1tech.com/forums/generatio...intakes-2.html

Let me know what you guys think i know the head to head test was done on a big CI motor but the one i just posted the link to is on a 346 CI witch probly alot of us have.

 

Sounds good. Post the results. Here's some more pics of a TPIS modifed LS6 intake guys.

https://ls1tech.com/forums/showthrea...ferrerid=13535