Yah, thats another thing to consider, let me email 3800 and see what they have to say about replacing that item...

I personally love the idea of being able to redo my entire exhaust from headers to tips in one day without having anything welded, but if the flexpipe is more beneficial, then maybe that is the way to go...

-Keegan

 

higher lift means more stress on your valvetrain. It's harder on every component, from the lobe all the way to the valve seat. Higher lift doesn't always equate to more flow or power, but with the IS3 heads, you'll make good power with high lift, it's just more stressful.

My cam doesn't have a very high valve lift for 1.6 ratio rockers (528/544), but it still flows well. It all depends on how the heads are ported. On stock heads, the flow doesn't improve much past .500", as you can see in the chart below. The Stage 3 figures are from another competitor's Stage 3 heads, not ZZP, nor Intense. Notice that the flow doesn't improve as much past 550...

GM 3800 Series II V-6 Flow Figures
Flow numbers at 28" of water on a Superflow 600 Flowbench

Intake
Stock
Stage 3

Lift
.100"
55.0
62.0

.200"
114.3
128.0

.300"
155.7
185.9

.400"
177.5
213.0

.500"
184.7
225.8

.550"
186.3
230.0

.600"
188.9
232.5

Exhaust
Stock
Stage 3
.100"
45.3
52.0

.200"
98.2
107.6

.300"
132.1
154.9

.400"
145.5
166.9

.500"
148.1
173.4

.550"
151.6
176.6

.600"
152.6
178.2


So my theory behind this is: Why stress the valvetrain to risk breakage for such little gain? If you could gain 5-10cfm instead of only 2-3, then it might be worth it.

Our engines are built for power between 4-6k rpm.... that's where I like to keep the powerband instead of going with a cam that shifts that peak past 6000rpm.

 

Wow, alot to digest all at one time... So what you're saying is that it might be easier on the valvetrain to do something like a stage 2, and it would be alot less stressful on the valvesprings?

 

Hey Keegan I ran across this today while sitting home with the stomach flu. $200 and you get a simple bolt in deal.

http://www.wbodystore.com/grandprix/...ers-p-180.html

 

Holy Mackeral Dan, is that a high-flow cat and Downpipe/Ubend Delete all in one?!?!

 

Well, Just bought that, so It'll also be waiting for me at home. Next Month I'll buy the SLP Powerflo, and in October, the T.O.G. Headers. Then, once I get home, time for some fun.

Hope you're feeling better Dan. Stomach flu is NEVER any fun.

Thanks alot, also, for the point in the right direction for the flexpipe all in one deal.

 

your definetely going to have to let us know if all this does anything...well in respect to the amount of money put into it

 

Well, the plan is to take a full length video when I get home, of internals, engine bay, exhaust notes, and I will be installing the Aeroforce scanners before I start modifications, so that it can estimate the horsepower. So believe me, I will be tracing every single mod. I'll definitely keep you updated!

 

A little late, but yeah that is the whole kit. Flu is doing better today that's why I haven't been on.

Once you've got this done though you can kiss any more exhaust mods goodbye because you've got top notch equipment there.

Now just amatter of engine work.

 

I'm actually doublechecking that GenV mod for hood clearance as well. I so need to fall into $4 Grand just to see what happens.