PI HAT

Just splurged on some Texas Speed PRC LS6 heads with the valvejob, and wanted some feedback on guys who got the 90MM LSX. Obviously, the better the motor breaths, the better, but. Money dont grow on trees ya know! While Im on it, anyone run those heads? F*^ck mustangs!!! F*^ck mustangs!!!

Formula_Power

iTrader: (18)

I have heard nothing but gains from a 90/90 setup and will have on installed on my new 408....however it would be worth it to get the intake ported as well to reap full power. it is not cheap though..new intake with porting and new TB should be near 1700-1800 dollars but with supporting mods should be worth around 20Hp over the LS6. I usually suggest people getting the 90/90 after you have most of the other things. The LS6 flow pretty well so you just have to decide if 20 or so HP is going to be worth the money

It does look like you do have most of the supporting mods in your sig so maybe a 90/90 would be a compliment to your setup now

VH5150

for a street car its awesome.... well worth the money, why choke the motor with a **** ls6 intake??? I know the fast is steep, but its a good upgrade... for a street car... 6500rpm's max....

red beast

I have seen other test and the gains where closer to 10hp...I wouldn't spend the money for that power gain...I had one on my old 402, I wish I would have spent to money on something else, if you are going to run a fogger system then the fast has the bosses in them which is nice...just my two cents...

ls2 bait

iTrader: (11)

unless u r tryign to get the last little bit out of your car or find a killer deal on one i say stick w/ the ls6. it will pick up power yes but the ls6 is a good intake and many people have run serious e.t.'s w/ one. its a big chunk of change to buy a new fast/ tb combo.

Mssingkid

iTrader: (7)

Couldn't have said it better myself. If your going to drop that much cash, why not get a nice nitrous kit??Even if it's a small shot, it'll be more effective than an extra 10hp up top..

100HP > 10 HP

The Alchemist

iTrader: (19)

Read any article about top na 346 motors or look at any of the cars making big power and they all are running a ported FAST 90/90 combo. It may not be absolutely neccesary, but won't be a restriction until you go big cubes (ie 427 and bigger).

It's my next mod. I may not get 30hp out of it, but at least I know that the intake won't be a restriction if I go to a bigger cam or even a bigger motor one day.

The reason some people see different gains is because the ls6 intake flows well up until you hit around 265-270 cfm. Alot of people's cylinder heads don't flow this until 550-600 lift and a cam doesn't spend much time at those lifts.

Now if your heads flow killer mid lift numbers, say 450-550, then you will see a bigger gain since the cam spends a great deal more time in this area, and can utilize the better flowing intake.

Tainted

iTrader: (9)

is over 1,000$ worth a 20hp gain?


you be the judge of that, I'd jsut get a metal intake and port it out

DSkyles

iTrader: (1)

LS2 intake?????? How about one of those. 3 of my friends have them on their cars.

Sideways240sx

iTrader: (22)

ls6 > ls2 > ls1

I believe it has been proven ls6 intake flows better then ls2 intake.
With the heads on the car, and the ms4 you have you will definatly get a decent gain with it. Especially if you get it ported. My buddy on a bolt on z06 picked up 18hp with the fast 90 90 combo.

Good luck. Chris

krobinson123

iTrader: (4)

What makes you say that? Just curious. My car's rev limiter has been bumped up to 6700 because of the h/c combo. I'm not questioning you, I', just looking for some info because i'm fairly new to the technical stuff

LS1-450

iTrader: (33)

This may be true ls6 vs a stock LS2 intake. However, I'd find it hard to believe that an LS6 intake would out perform a gutted, smoothed, & filled LS2 intake w/ a 90mm throttle body. About 30-40 posts down I posted pics of a gutted, smoothed, & filled LS2 intake next to a Weiand. A stock LS2 intake has many internal restrictions in stock form that can removed to achieve its' maximum performance. It takes a lot of work & patience, but, for the total of $280.00, including gaskets & an LS1 to LS2 "o"-ring kit from Katech, that I spent on a 90/90 set up, may be something others want to look into.

If interested, the thread is titled (LS1/LS6) ported Weiand vs modified LS2...

SSwt00SS

iTrader: (18)

it's completely worth it. this is what a ported FAST 90/90 and additional porting done by me, did for my car, over the Ls6 intake I had previously installed on my car...

https://ls1tech.com/forums/appearance-detailing/761478-porting-prepping-painting-fast-90-intake-write-up-tons-pics.html

nexvctm2001ss

iTrader: (8)

good numbers...but was that in the same weather conditions???

SSwt00SS

iTrader: (18)

no it was 60's and rainy when i had the dyno pull for the LS6 intake at RPM in Jan, 2007 (408/388)...

it was cloudy and mid 70's for the LG Dyno Day May 5th, 2007 (408/386)...

it was sunny and high 80's/low 90's for the dyno pull and retune for the FAST 90/90...

if you click on the link in my sig there is a video walk through of my build up that you can watch in order...

GR33N GoblinM6

iTrader: (14)

unless you already have a midsize cam, headers, exhaust, or heads... and you dont race, then you really cant justify the price tag for the intake.

If you have all that, and do race (be it drag or road or such) and you need that cam and heads to breathe.. then yes its justified..

to the other guys saying "look at all the big HP cars and blah blah blah".. look at the dick harrell cars.. they come with a wieand intake which is NOT ported but only slightly cleaned up on the casting flash.. and those are at the 600hp mark..

so unless you have over 420rwhp (which is about 480 @ the motor given 15% drivetrain loss) you really dont need it..

but its your money.. you do with it as you will... as for me.. im at 372rwhp.. my cam loves to breathe up top.. would i see a gain with a 90/90.. probably.. but for $1200 i would rather buy a set of Patriot Heads to get me the 30-40hp i need.. instead of the "MAYBE" 15hp i might get with a 90/90 as my car sits now...