First off im new here and dont even have a 3rdgen fbody but i felt this was the best place to get the info im looking for.

I have a 85 monte im thinking of putting a 355 carburated motor in but would like to swap to fuel injection and boost it. My options so far are either the Holley stealth ram intake or a tpi setup and slp runners. The car is going to be mostly a street car but see the track a few times a month. So basically i like the low end torque the tpi setup makes but is it going to take full advantage of boost at higher rpms. If the stealth ram will still give that low end torque but perform better in upper rpms than id prefer that.

So now that ive lost you all, will the HSR make similar low end torque and more hp in the mid and upper rpms?

Added pic of motor

 

hsr on a naturally aspirated motor will make more upper midrange/upper RPM tq and HP than a TPI, tpi will make a butt load of tq down low. when u boost either setup the flow characteristics totally change, the TPI doesnt become as restrictive when ur pushing air through it, im not sure how the HSR behaves under boost but someone i believe said something about boosting an HSR and it wasnt the best bc of the thin plenum walls or something, i could be wrong. the HSR does loose alil low end grunt but makes up for it in the increased HP and RPM's.

theres a 9s 1/4 mile trans am thats running a stock TPI (stock plenum, runners, base)with 58mm TB and a pair of small turbos, that things making over 600hp at the wheels. so basically its really up to u and wat fits ur budget. more important will be your head/cam combo and tuning

 

I used a run a 355 TPI with a Vortech Super Charger @ 8 lbs of boost for a while and was able to smoke the tires off.. The TPI will start falling on its face around 4500 rpm even under boost. You do like you say have a butt load of lower end torque. I converted to a TPIS Mini-ram and didn't notice any lower end torque loss, but noticed substantial mid and top end power. I have since changed the engine around and now am running @ 18 lbs of boost under a modified S/C from Vortech and Nitrous. But, since then I am running new 210 AFR 75cc heads, with new everything to include the engine.
I haven't seen on the other hand, a stock tpi engine, no matter what boost settings or turbo combination to ever run in 9 seconds. Maybe possible under boost with a severe butt load of N2O but only able to do that 1 time before he has to go back to the track and pick up the base pan and heads because they have been blown off the engine. Possible low 11's would be more reasonable.. A friend of mine has a 63 falcon that is twin turbo charged. The older engine was a 514cid and he was only running 9.54 @ 154mph.. Now with his 604 CID he is in the 7s bracket but he is running in between 2000 and 3000 hp. And his car is something from the future, and I know mine will run 7s class also only if he puts a tow bar from the back of his car and attach's to the front of mine. But it will suck when the parachute comes out.



http://www.460ford.com/viewtopic.php...ghlight=falcon

 

Search and you shall find that 9 second stock junkyard truck engine TA, that made multiple passes and dyno runs. You might also come across a 9 second Camaro with Vortech supercharged '305' as well... although that may have been a 10.0 he ran before the turbo swap put him into the 9's.

http://www.theturboforums.com/smf/in...?topic=61219.0

Thats one.

I think its going to end up personal preference or trying to reach an ultimate goal that will affect your intake choice.

 

This is not bone stock TPI with just a set of turbos.

(2) bolt 350 and a set of used 487x heads along with a comp 268 cam. The engine has been bored .040 at one time and ran well when pulled out of a truck 3 mos. ago. How long does you guys think this time bomb will last? I did this years ago with a 350 from the local wrecking yard and it ran 11.10 in a chevelle with a roots blower for 2 years! I have ran a best of 10.10 in my T/A with a 350, dart 200's and a 224 duration cam at 22 psi. The motor has at least .025 ring gap which is a vital part of this madness to ensure against ring butting.

If there are that many junk yard motors out there that run 9s in a quarter. Can you provide the proof with Engine type or vehicle that it come from. I know the Toyota Supra twin turbo and the Shelby Cobra were in the 9s bracket from factory.. And if you goto the track, why isn't everyone running in the 9s or less bracket. My friends Falcon ran in the 9s bracket after he put more money into his car that what I earn in 1 year. Remember that suspension, Gears, Car weight, engine plus everything else plays a major roll in getting into the 9s. Not being a newby, I do know that you can take any engine and put enough juice or forced air to it, Sure you can get some ponies from it for a while.. But plain and simple IT WON"T LAST!!! Isn't that a little counter productive! Just putting a set of turbos on is fun or squirting some juice, yes, I do both!!! but, is it worth the time changing engines because you want to have fun for a few weeks or days..

 

 

I dont intend to keep the tpi setup stock if thats the route i choose, most likely shorter runners and a big mouth base. The motor will recieve some better heads than the current 2.02 valved stockers and an appropriate cam and most like ~10lbs of boost depending on its final compression ratio. My goal is to peak into the 11s but retain good day to day characteristics.

With that in mind would the miniram be overkill? The cost of the new base and runners is going to cost close to the miniram so if its a better option without being too much id choose that instead.

Also since im converting from a carb to fuel injection what is a good program to use to manage the fuel delivery?

 

Verze, read this article. It will show you what kind of gains the different intakes can offer out there.

For the money, there is hardly a better intake out there if you want more top end, and the low-end loss is very minimal. In that test a HSR had about 40hp more on the top end than a built/ported TPI system using aftermarket runners and such. Against a stock TPI system it was nearly 100hp more, with only about a 30lb/ft loss under 4000rpm.

http://www.compcams.com/Community/Ar...?ID=1737510521

 

That is exactly what i needed thanks alot

 

I find this thread interesting because I am going to build a procharged tpi myself. I think the flow rate would not change even under boost because if you suck through a straw or blow through a straw it dont matter you are only going to get so much air to flow through that straw. However when you run forced induction through a TPI it will still reach it's limits at an early 4500 to 5000 rpm but you will get to those limits much quicker.

That being said I think running something like a HSR or a mini ram would unleash a whole new beast under boost. What would be a 80hp increase on a N/A car might be a 150hp increase on a forced induction car.

I wish they would run that same exact test with a procharged motor.

 

I found the article on the the above mentioned Firebird in a issue of car craft i had. Hewas using a stock truck block with the original 991 heads with 1.6 rockers a comp cam and two GN turbos and made 554rwhp which pushed the car to low 10sec ets. That is on a stock tpi setup aswell.

I think thats some impressive numbers and the HSR or miniram will only increase that. Now the decision making begins.

 

thank you VERZ thats the article i was talking about.
some engines can handle boost and nitros without blowing.... its really just luck and that parts, this article states that he build a motor for the turbos and it had forged parts and it blew almost instantly. he then just threw a truck junk motor in and its survived so far.... engines are wierd like that. some will last forver and some just cant take it. as Verz stated he put down that much rwhp which is way over 600crank hp, with a STOCK TPI, i know he later increased the stock buick turbos that where good for 375hp each to some others that where good for alot more and then started putting down over 600rwhp. so explain how hes running 9s now with a stock TPI with twin turbos thats peaking at 4500rpms???? i dont think so, i believe his shifts points where way higher... had to be

as far as intakes/heads changing under boosted applications... go to aftermarket intakes threads and look, there was a recent one i was on that stated they change, this guy had it all figured out.

 

thirdgen89GTA.... thats an amazing site wow, ive been looking for something like that to prove to myself that i picked the HSR for a good reason.... my setup is simular, with 195cc patriot heads, HSR ported, XFI280 cam.... i should def be putting out 500hp now yay!

 

Don't forget though, the engine they were testing has no accessories, an electric water pump, and probably dumps straight out of the headers. So the numbers are up a bit over norm.

 

yea i got kinda bumbed after i read that lol but u will gain hp/torque with a good exhuast over dumpin outa the collectors. still im only running alt, water pump, and powersteering. i got rid of all the other garbage and put on underdrive pullies so that should help

how much hp is taken from alt, a water pump, and powersteerin

i kno if u disconnect the alt before a drag run its worth a tenth. and an electric water pump is worth 25hp....