i have a 350 88 iroc with tpi. i have pure bolt ons like, exhaust, headers, pulleys, msd, and so forth. ive taken my entire tpi system off and im ooking to replace it to somehting better. still wana keep tpi, car will stay as a regular street car. i rarely drive the car, as its not my main transportatin, but i just wanna beef up the tpi for a bit more performance and drivebility in the street. first thing to replace is intake, theres tons of info here and its somewhat confusing which directionto head. im torn between the tpi big mouth the eldelbrock intake, or the super ram intake. and with this what runners to use, with either i plan on using slp runners. my ? realy is what stuff to buy for my needs and also i have 3.73 rear end, a rebuilt beefy 350 tranny, and next mods will be rebuilding the 350 with better heads and internals, so i do not want to spend money on the tpi now and have to replace things later when i do further mods, any help is apreciate it thanks

 

the holley stealth ram is a NICE complete set up! the problem is that it costs like $2300!!!!!! the TPiS mini ram is only like $880 or so but u need to get their fuel rails which i think is like another $400? the holley and edelbrock hi flow intake manifolds from summit are like $750 or so and u can get a bigger throttle body like 58mm and port your plenum. any way u go, youre probably gunna spend over a grand.

 

yea im looking @ maybe a grand limit, considering i shop around and looks for better deals, i was maybe loking towards going eldelbrock intake, slp runners, bbk fuel regulator, a holley 58mm throttle, port my own base which ive begun to do, and get a new maf sensor, take the screens off and try and get the most ouf of it, maybe new injectors but im sure my 24lbs should be ok for now just looking to get 300 so horsepower eventually, i figure with 300 horses, with a lightened car and a nice working suspension the car should be nice and fast enough for the street

 

I picked up the HSR, including intake gaskets, fuel rails, fuel lines, adapter fittings, etc., for under $700, from Summit. I will need to also purchase a water outlet and vacuum fitting or two, so more $$ will be spent. I think the HSR setup you were looking at was including the ECM and associated wiring harness and a throttle body, which you do not need if you are converting from TPI. There is a very good thread on the HSR swap in the Alternative Intakes forum. Also, checkout www.stealthram.com. -Bill

 

I would go with the TPIS mini ram. I saw 45 horse increase with that. I would not buy a 58mm throttle body. That flows 1100 cfm, which in theory 1.5 cfm per horsepower. You would need a 58mm throttle body if you make 600 horse or more, other than that no one should have a 58 throttle body. I make 470 horse at the motor and i have a 52 throttle body.

 

If you are not going to do any work on the runners the SLP's would be my last choice. The Edelbrock runners are better out of the box flow wise. Those from AS&M are better yet.

If you can find a used set of the first design SLP runners they flow pretty good.

 

85projectZ28; You are way off,,, the HSR does NOT cost $2300. You are talking about the complete ECM HSR system which you would buy to convert a carb car to EFI. If a person has a '88 350 TPI, the HSR option costs $310.

godreject: If you want to keep the "TPI" look, then you will want to simply buy large tube runners and a high flow intake base (from Accel or Edlebrock), and port the factory plenum. Put this together and you will have noticably kicked up your performance and it will look completely factory.

But, lets keep things defined here correctly. The TPI intake system is made up of three parts, the intake manifold (or also called intake base), the runners, and the plenum. The plenum is the upper most piece.

The Holley Stealth Ram (HSR) is not a TPI type system. However, the Accel SuperRam (SR) is because it has the Intake base, runners, and the plenum. The plenum on the SR is huge. Also, the SR has a completely different look to it than the factory system. This is the system that I am running right now.

And depending on what you want to spend, you could install aluminum heads and a cam. It just depends on how far you want to go (and spend).

 

doc... you said the hsr is a 310 option with tpi...are the oe fuel lines compatible with the hsr or do you have to buy hsr fuel rails? thanks sorry for jackin the thread.

 

by no means am i trying to hit 600 or so horsepower, im just looking to tune up my current setup and yes aluminum heads are the next mod so im lookign towards a system which will be compatible once i pick up some better heads and cam. by no means is this car meant to be a beast, just lookign for some more power, eventually i plan on redoing my suspension so i canmake the little power i have stick, which i believe is most important. but the hrs looks promising again i have a bout a 1k limit what about a fuel pressure regulator, i was just looking into the bbk i know these arent so expensive so not a big deal but will the bbk do the job or is there anything better thanks 4 the replies so far

 

Holley offers 2 fuel rail kits for the HSR, 1 with an adjustable regulator, 1 with non-adjustable regulator. www.stealthram.com.
Bill

 

from the posts Ive searched on hsr to tpi your stock fuel rails will work with some rerouting mods to the supply and return lines.

 

I think i will go with the hsr system, i will order the hsr intake and adjustable fuel rails first to start off install that and later get the 58mm throttle body once a good deal comes around. i will order items from summit besides the hsr intake and duel rails what else do i need to order to do a direct swap, will my stock 22lbs injectors work with the new fuel rails

 

Your 22#/hr injectors will work just fine.

And I agree that it is far better to get the HSR with the adjustable fuel pressure regulator (AFPR). You are providing yourself with an important tuning tool. BTW: You will want to get a fuel pressure gauge, also. Measure your current fuel pressure before you take anything apart, if you can. After installing the HSR, set the AFPR to the same pressure you had before making these changes.

HSR is alot easier to install than the SR, you should be satisfied with it.

However, I would buy the 52mm TB with an airfoil. The 52mm TB will flow more air than you need. The 58mm TB is way out of line with you other choses. You said that you will be running a screenless MAF, this will flow about 652 CFM. The 52mm TB will flow about 899 CFM, the 58mm TB is well over 1000 CFM.

Good luck on your project, sounds like fun! I learned a number of things, one important point is to purchase the right & good tools to do this job.