69LT1Bird

iTrader: (1)

The sad part is that none of those results are worth the money ($1000-$1500 with TB), all it does is look good on paper (dyno queen).

At the track you could pull your seats out and lose weight and gain more in the 1/4, heck leave them in and you still won't see any gain in ET or trap speed from the 15 hp. By the time drag and friction come into play driving the car, that 15 is now down to 5. At least people are helping some of the vendors move stock so they can recoup their losses.

But they do look nice.

82cetuner

iTrader: (9)

This should not be the first thing you put on a ls3. especially a stock cube one.

The ls3 intake is more than needed to handle the stock cubes and airflow.

However you should have netted SOME gain and not lost 30 freakin hp. What you should have done is did a dyno on stock tune/intake, then a dyno on stock tune/Fast intake then a dyno on non stock tune/Fast you added in more than one factor by not doing that. I say your tuner is not that good and he probably would of lost you power on the stock intake after a tune as well.

have a 102 mm intake still only limits it to the size of the T/B. the only way you will see good gains is if the intake runners themselfs are a better design than stock, because you engine is still getting the same amount of air

Louis

iTrader: (7)

Listen- Do you see me selling these intakes? NO. Would I post in a thread and say I made 5/5 at the wheels over a stock LS3, and then post another and say Hey, group buy on LS3 FAST 102s?


As for the TB, Has anyone ever tried to put one on a car, with an electronic Drive by wire TB? Its a royal pain to get them to run right.

at the 675 rwhp Level, the TB is worth 11 rwhp, NA. To me, the time spent, and headache that comes with it, is REALLY not worth it.

Port your stock LS3, save your money, go home happy.

Louis

Low_LSX

iTrader: (33)

Thanks Louis. We just sold the SLOW intake and installed the stock one back.
Who do you recommend to port the Stock intake?

94 guy

iTrader: (125)

speedinc, needs to show us who gained 20.

ss dave

When this intake first hit the market Katech did a side by side by side comparison and posted it on this site.
I trust Katech and their numbers, Jason even posted the dyno graphs.
It showed HP gains but it really shined with the TQ curve.
https://ls1tech.com/forums/generatio...omparison.html

69LT1Bird

iTrader: (1)

Here is a good test by a guy who bracket races. This is at least a real world test. He gain just over .10 and just over 1 mph, very expensive gain.
Post #64
https://ls1tech.com/forums/generatio...s3-here-4.html

mike c.

iTrader: (1)

The fast 102mm made no gain on my car with a 402ci and ported l92 heads. I had some issues with it,but they seem to of fixed that. Will know more in a few weeks. Still on a back to back run it made no gain. I did use my 90mm th body and 85mm massair. I will now be testing a ported ls3 intake over my stock l76 some time in the weeks to come when all else is done and solved. I was real excited thinking the intake would gain like the fast of old days. I'm just happy I didn't have to pay for the intake to see the results.

69LT1Bird

iTrader: (1)

Nobody has ever disputed the gains of the LS7 manifold, the issue is the LS3.

LSWNDR

Well for the money you spend for these negative gains it's pointless to fire the trigger just to chase a number. My question is did you retune & dyno the car after putting your old intake on the car to see if you gained what you lost? Should of had the 102TB without a doubt. Well let us know what you gain back from the stock intake???

SIC LSX

iTrader: (10)

same dyno? same tune? same weather? did you dyno on same day? you dyno it again with stock intake? They all come into effect. you can have the baddest intake but if its tb is like breathing through a straw an to small u will have no gains.

ss dave

Sorry I posted the wrong dyno comparisons link.
Tried to find the initial Katech test but could not find it.

8ByGoat

iTrader: (2)

I swear you work for them LOL.

All the gains you state above are gains made against a stock LS3 intake. Subtract 10-15 from the numbers above (the gains achieved by porting the stocker) and the gains you get from the 102 ar nil.

Stangkilr

iTrader: (47)

LOST 30RWHP?! Something else is going on besides the intake bud.

SIC LSX

iTrader: (10)

What he said! vacuum leak maybe? i bet they didn't adjust the tune too. Dyno # have to be compared on the same dyno around the same day. Do a pull on dyno then put new intake on and dyno again then tune on dyno to get 100% results.

CBIII

iTrader: (6)

i was wondering the same thing..did you bother tweaking the tune at all? or just throw it on there, dyno, get pissed, call it a waste of money and then this?

smok'nZ

iTrader: (160)

i decided to keep my lsxr and buy a 105mm tb and run it on my 408 with nitrous i will keep the L76 as well to do a true back to back test ill swap them at the shop i hope there is a 15 rwhp difference on my 408 with spray

Slowhawk

iTrader: (12)

A 30hp loss point's at some other problem.I've found that all the cars we put them on liked to run less total timing to make power than with the stock intakes.

For LG -The 102mm TB is very easy to tune in,well after you figure out the tune on the first one.

94 guy

iTrader: (125)

slowhawk, have youseen any power with this intake on a 408? also smokinz, when do you plan to do the swap?

Slowhawk

iTrader: (12)

Haven't done any stroker motors with them.We tend to stay with the older style heads on stroker motors.