So all I have been reading here lately is how TPI sucks at higher RPM's, and how short runner intakes are the way to go for more HP. I'll try to make this short:

1989 Camaro RS (305 TBI originally)

swapped in a 350, with World Products S/R Torquer Heads (2.02/1.60) and a cam with something around 210-215 duration and .500 lift, lobe sep. 114.

I wanted the TPI because I knew nothing about the HSR or other intakes. I ported the stock intake and plenum.

I'm wondering if I should go to the High Flow TPI like Edelbrock or say screw it and go HSR? I've only spun it up to 6000 rpm once and that was by accident. Tranny sucks and TV cable wasn't hooked up at the time and it went from 4000 to 6000 in between gears.

So what is the major advantage/disadvantage of the swap?? Thanks-

 

Well i just did the swap, and it is very straight forward. The hardest part is actually getting tpi off. Then just reroute vacuum and fuel lines. The major advantage is superior top end performance and dont listen to what other people say, u dont lose very much tq down low. The only disadvantage is that tpi looks killer under the hood compared to HSR in my opinion and u lose egr function.so if u have a visual inspection u will fail,but if only sniffer u should be okay with some tunning. The HSR would be the best for price and performance. U can usually get one for 400-600 used compared to larger runners and base at about the same or higher. What ever you decide have fun with it!

 

I've read that the fuel lines can be a pain to connect. When I swapped from TBI to TPI it wasn't that bad, but this looks like a complete reroute.

I'd really like to try the stealth ram, but I don't have my TPI tuned properly yet either. Just don't like the brick wall effect around 4500 rpm.

 

The HSR will definitely knock out that "brick wall" of yours. It's just a tunnel ram for EFI. It'll move air like you wouldn't believe. Fuel lines aren't such a big deal, you just need a pair of braided stainless hoses and a couple of -AN adapters to fit your factory fuel lines. With the parts you've already got, the StealthRam will make a HUGE improvement over TPI. One way or the other it needs to be properly tuned if you want the best manners and the most power out of it.

Just watch out for hood clearance with the StealthRam. The Pontiac guys have problems with that, but you should be OK with an RS as long as you have stock-type motor mounts. Check it before you slam the hood.

 

Not really that hard depending how u run the lines. They sell a fuel line kit for it i believe, or just search this site and that will help u there. As for a tune, it would deff help, but i am still running stock tune and runs good still. It is cold and snowy here so i havent even seen the hiway with it, but cruising the back streets it pulls super hard now. Now at 2000rpms on sucked back in my seat untill i let off whereas with the tpi i was anticapating more and was always let down

 

thanks for the reply guys, you've really helped me out. I'm leaning towards the HSR more than ever now. There is a shop about 2 hours from here that will tune a custom install, but I'd have to trailer the car down there for that. Also what kind of exhuast are you guys running with these intakes? I' have the old standard _ Shorty Hedders, 2.5 y-pipe, single 3" into a Mangflow with dual outs.

 

My exhaust is basically the same as yours. 1 5/8" primary Hedman shorties into 2.5" collectors which go to 3" where they Y together, then a single-in, single-out 3-chamber Flowmaster in the back. No cat of course.

 

I have a factory 1989 distirbutor with external coil unit. Will I need a new dizzy or will this setup work with the HSR?

 

Im closing this. you post too many threads asking the same questions. Stick to one of them.