Intercooler2

iTrader: (24)

I'm trying to hit the edge of the roll bar rule 11.50. I am basically doing or have done "FULL" bolt-ons below:

- 3600 Circle-D
- Ported TB
- LT's
- 3":4" custom Y into Flowmaster merge
- 4" exhaust with dump
- Full suspension
- 1.85 roller rockers
- 25% underdrive
- Lid

The last thing I see that can be done without heads/cam is the intake. What increase would I see over my LS-6 and is it even worth it?

massls1guy

iTrader: (9)

there are a few responses to that question in this thread:
https://ls1tech.com/forums/generatio...t-92-92-a.html

looks familiar

Intercooler2

iTrader: (24)

Looks familiar but not much data. I know someone has done the swap and even has dyno data. What I am looking for here. Pulled the trigger on the 1.85's.

massls1guy

iTrader: (9)

Did you see this thread. Bolt on car, fast picked up 10rwhp peak but lost everywhere below 5500rpm:https://ls1tech.com/forums/dynamomet...0-results.html

Intercooler2

iTrader: (24)

Nope but that explains it. Also puts an end to bolt-ons! Guess my only other route is lighten it if I don't get there.

w3s1c0a5t

iTrader: (3)

How much you weighing in at now sir? By the way The car is ****... You havent cut corners and it shows. Great looking car.

Intercooler2

iTrader: (24)

Thanks! I need to weigh it again but 3580 was the last time I weighed it.

chrs1313

iTrader: (24)

not going to hit 11.50s, gotta drop some weight to do it SI...

although i think with 1.85s you really are not stock internal anymore...

drop some weight and get some cold air...

dont forget about the ram air...look up sux2bu, my custom ram air, or a FTRA/SSRA...best systems out there

SidewayzOZ

iTrader: (11)

I wouldn't do it on a bolt on car. If you add a cam then you should do it. At that point you can pickup top end without sacrificing low end.

SweetS10V8

iTrader: (4)

Take a minute to honestly research for yourself. Your taking one graph and taking it as the gospel when there are 100s of dyno graphs that read differently. Plus the guy taking you to all these negative threads is a FAST hater for some reason.

Dont just look at who responds to your thread. Read up, research, look for people who really have experience. Take Tony Mamo for example. Ask him how much the FAST gives up. Just look through his posts, he is an airflow expert! He designs the ports for airflow reasearch's heads, see what he thinks, he has no ties to FAST. He has just figured out how to make the best a little bit better. Here's something to remember too...
You cant simply take one dyno graph and say "well that explains it". Especially when that graph is the exception to the rule. Was anything wrong with that run? Its so far off of the results I have seen in the months of research I put into buying the FAST vs the LS6. I didn't have the cash either but I waited, and while saving researched. The moment I bolted my 92mm intake on and went for a drive. It felt...WOW, better than I hoped. I gained torque and power everywhere.

Personally I have seen great things with the FAST, sure, buy the LS6 if your short on cash and simply can not wait.

Heck, just got back from reading a thread where a guy took his FAST 78mm(which are typically cheap), and opened the throttle body to 85mm! That's what you do when the funds aren't there, that's ingenuity!. Used parts can be a great way to make good power.

massls1guy

iTrader: (9)

I'm not a fast hater. Here is the first line in a post I made to you:
Here's another part that I think is pretty reasonable:
The post is over here if anyone else cares to read more:
https://ls1tech.com/forums/generatio...e-exhaust.html

SweetS10V8 - you're the guy who put a fast intake on a 300rwhp car with no bolt on's. Maybe you should do more research sir.

Detoxx03

iTrader: (14)

I would get it

SweetS10V8

iTrader: (4)

And gained torque and power the entire dyno pull, with a peak gain of 21rwhp. Yup, terrible move on my part how could I be so stupid!......

I even did and A-B-A test.

teke184

iTrader: (5)

nice gains Sweet.....but you have to admit...you have a couple more cubes with that LS2. and did you go from an ls6 or the ls2 intake?

isn't the ls2 intake about as good as the ls1?


but to the OP...if you are absolutely going for every bolt on possible...i say go for it. pull it apart, bolt it up and port match it to your heads.

while its possible you may lose a smidgen of pwer down low, when racing you're rarely below 4000rpms for long. so a 10hp gain above 5000 would be a benefit.

and i say get track numbers before and after....

YOU can become that informational post that other guys will look at when thinking of doing the same thing.



i've heard so many people put down the FAST on bolt on or cam only cars....so i ponied up and got a ported FAST 90/90. and i tracked down a shop to do a before/after dyno run of the setup.
they are gonna touch up the current tune (needs it) and get dyno numbers (this is with the ls6). they swap in the ported FAST, retune and redyno.

scheduled for Feb 14th....so keep an eye out.

01Z0H6

iTrader: (63)

I agree with some of the others here with regard to "Is it worth it, or not"..

I too am running a "Bolted A4".. All of the bolt's... a decent cam (G5X3),LS6 heads (unported),pulley,SVO's,headers,exhaust, LS6 intake w/ pp tb, built RPM4 tranny,Vig3600

I too have purchased a FAST 90/90, 85mm Delphi MAF,FT85mm lid, that i will have intalled @ the end of this month.

I will also post before,after numbers.. Every car is different, I am confident that "for me", i made the right choice when purchasing the FAST combo.. We'll see..

To the "OP", personally, i would do a cam first, heads, FAST.. you already have the bolts, you already have the stall, tie them together with a nice cam..

Just my .02, and i am NO EXPERT...!

Intercooler2

iTrader: (24)

Trying to wring everything I can out of it without going inside. Rockers is kind of a cam upgrade for me.

w3s1c0a5t

iTrader: (3)

So do you think your going cam after this? OR going to take out a little weight?

So i got my exhaust finished btw sir. Im very happy with it. Im looking to get someone who can take a decent sound clip of it.

massls1guy

iTrader: (9)

I'll bet you $1 that an LS6 intake would have given you more across the board gains with your current setup.

I think you fall into one of two categories:

- You will eventually add more mods and take advantage of the performance gain that the fast has to offer.

- You just like the look of it. Looks good with the hood open, red vette covers on there too. Nice picture of it posted in your sig.

Either one is fine with me. Good luck to you sir.

Bad Blue WS6

iTrader: (41)

id guess you'd lose some low end torque with a fast on that set up....

fueledpassion

I'm confident that you made the right choice, too! That cam is far more than "decent". Crap dude, any bigger and you'd be too big on a stock cube motor. You'll see phenomenal gains especially mid-range and top-end..if the LS6 heads don't run out of breath. Pretty much all you need is a good set of AFR's and your maxed out.