I am just curious how much 5-6 pounds would get me.

 

I would say about 12-15 for every pound

 

Well.. depends... i think that 10 is for a smaller engine.. 15is more likely for ours.. and 20-25 if intercooled...

 

You are referring to the rear wheels right? Doesn't seem right to get only 90 HP at the flywheel with 6#s.

 

Without any special tuning that's usually about right for non-intercooled. Having it dialed in to the Nth degree would net you about the same at the wheels. Intercooling will not make such a profound difference as one poster stated, but you could tack on an additional 10 - 15% as a rough guideline and not be too far off.

 

I beg to disagree.. I gained almost 55 rwhp with just the vortech aftercooler and loosing 1.5psi ... So.. you tell me...

 

So that is flywheel horsepower... 90 at the flywheel will net less 15% at the wheels... about 75 +/- ... doesn't seem like much for $3000. For a stock motor....

 

For $3150, I picked up over 100hp & 100TQ to the rear wheels. Stock motor.

 

Now that's what I wanted to hear... 100 RWHP & TQ. Is that with an 8# pulley?

 

Yes it is, and I'm only seeing 6-7lbs on the gauge.
Oh yea, and I'm gonna rebuild shortly(head gasket), after 2000 miles! WooHooo!

 

I picked up 150rwhp with my ATI tuner 8# with dual intercoolers, safely tuned to 91 octane gas maxing out at 17 degrees WOT timing. Even with 6# of boost, the ATI did almost 110rwhp over stock -before- we ever even tried to tune it.

That's one bit of data that might help you...

Mike M

 

Not fair... ls1 heads are far better stock than LT1...

 

So with 8#s you're already going into the rebuild phase. Yikes! I plan on rebuilding but one bite at a time. First, add the supercharger then save for a rebuild. Perhaps I should start off with 6#s to be "safe"?

ATI - P1SC 6#
High Flow Twin Intercoolers

That would let me grow when I build the bottom end later.

 

With this non-intercooled 6# I have now the cars runs GREAT... It pulls like no other. The way I'm doing it is blower, then ignition and fuel (walbro 340 going in Saturday), then top end heads/cam (coming very soon), and then rebuild bottom end 355 and leave it 6# until I upgrade to a 12-bolt and intercool it. I expect that will the heads/cam I won't make that full 6# that Im making now, which is actually what I want to happen. I want to eventually go with a custom front mount spearco then run my 11# pulley. Intercooling will make a more noticeable difference on higher boost apps....

So basically, keep the boost low on the stock engine and most importantly DO NOT DRIVE IT HARD ON THE STREET!!!!!! There is no reason to be in boost daily driving... I can easily pull on any honda some other BS without hitting any boost. You keep it cool and only push it when you need to and it will last you how long you need it to.

 

So is it safe to say on my LT4 head and LT4 hotcam car, I can reach 100 hp with 5-6 pounds of boost? I am dumping the nitrous, but I don't want to run more than 6 pounds of boost, but I don't want my car to be slower than when I used my 100 shot either.