i want to ditch the TPI and go for something better... i like the MR, but if the LT1 intake gives the same power that the MR dishes out, i'd rather go with the LT1 intake. the HSR looks too ugly to me... but it's pretty cheap. i really don't plan on revving the iroc past 6 grand, and i don't want to waste a lot of money on the intake either... so here're my questions:

1] from 1k to 6k (rpm), which intake produces the most low end torque and highest top end hp?
2] i have ported stock heads... if i get the LT1 intake now and later wanted to get a set of AFR 195's, would there be a problem installing the intake on the AFR's?
3] look at my sig... which intake do you think i'd get the most gains from, and how much of a gain do you think that would be?
4] does anyone know how much more power there is to gain from porting out the LT1 intake?


i have a cam that's rpm range is from 1500 to 5500, but im sure i wont have a problem pulling it to 6k from time to time. the LT1 intake looks like the best bang for the buck, but if the HSR can pull more power up to 6k, then i'd spend the extra money on that.... i just wont pop the hood for ppl due to the fact that it looks like a silver brick ontop of the intake manifold, lol

im just getting tired of the limit tpi has... i want to run deep into the 12's, or maybe touch 11's without nitrous. i know you have to match your whole setup accordenly, so thats why im looking for an intake that would compliment my setup that i have so far. im planning on getting a TC after i get my intake, so i know what stall to get. im kinda iffy about the HSR because i've heard mixed reviews about it... i've heard of some ppl only gaining a couple tenths after the install, and some even losing power, so i don't know if i even want to go there at all, lol

thanks you guys for reading all my crap, and for your input... take care

 

Go to stealthram.com and see if any of those guys think it was a bad idea to purchase the HSR. Most everyone there have 350 engines. I think you will certainly break into the low 12's with the right combo. The HSR intake is a mid to high end intake. Some claim to lose a little lower end torque but I didnt notice any loss yet.

http://iroc.fbody.com/intake.html
http://www.stealthram.com/flowcomparison.html
http://www.stealthram.com/intakecompare.html

These three will give some comparisons for you. A few people with HSR have shaved the top off of theirs and polished them as well. They look great. Personally if the "brick" works better than the tpi setup...I'll show them the brick. Everyone has been impressed with my brick. Others like the LT1 as well. Hope this all helps.

 

im starting to look into the HSR for a few reasons... one of them is due to the fact that i read the LT1 intake has power limits, and that i'd have to do a lot of ghetto rigging to make things work perfect... lord knows that i dont wanna rig anything in fear that if i mess up, it's just going to give me a bigger headach that i dont need. dont think i'll be going MR because it's peak power is 7k and i wont be spinning that high... damn, i wish someone had time slips showing the difference between the hsr and the lt1 intake on the same motor... what kind of gains do you think i'd get with the hsr if i get the timing and fp at the right spot, along with a custom prom? thanks guys

 

Each choice has it's pros and cons...some might mean more to others..


I like the looks of the TPI....plus if you shop around, you can hop up the TPI to support a good bit of power.

There is a local guy here with a LTR TPI setup that runs 12.40's in street trim, and it's his driver.

That's with a 383, Brodix heads, Aftermarket base ( home ported and gasket matched ), big tube runners, ported plenum, 52mm TB, shorty headers, full exhaust. The cam is pretty mild roller. But it's all made to work together. Before he started putting in more money for another intake / etc, he spent time and money getting the car to hook up with what he has now.

That's on street tires and full weight. All his parts except the short block hard parts, were swap meet / online / Ebay deals. He added up receipts last season, said he had about $2800 tied up in the engine from oil pan up.

His biggest problem was blowing up 700's, since he didn't want to shell out the $$$ for a good rebuild, so last I hear he was swapping in a T56 he nabbed at Carlisle.

My preference would depend on what I had available to me at the time, since I like the challenge of going fast on the cheap LOL

 

I'll be swapping my TPI over to the modified LT1 intake this week. I'll let you know what I think.

 

Basically, all three intakes are upper RPM manifolds, but the stealthram is better suited to operate at or below 6000 rpm than the other two. With that being said, my 350 pulls hard to ~7k, which is where I shift while racing. I also noticed no drop in low-end power, and in fact, I cut 1.66 60 foot times which is considerably better than the 1.8x to 1.9x I pulled with the LTR. It comes down to your personal preference, but I think I'd go with the 6" runners of the stealthram for a motor that is going to peak at ~6000 rpm. The LT1 intake has 3" runners, the miniram has 3 1/2" runners. The rule of thumb is the shorter the runners, the higher the rpm POTENTIAL.

 

The following link is a HUGE thread (7 or 8 pages long), but the moral of the story is that Mike Crews went ~12.30's with a mild vortec headed TPI 383 !!

I would stay TPI (but you allready know that)!!

If you feel like reading a novel, then click the following link:



https://www.thirdgen.org/techbb2/sho...threadid=84340