I am getting rid of my 355 and putting in a 383 the motor is put together with 10.6 to 1 compression edelbrock roller cam with 548 538 lift and 294 300 duration and a set of world products sportsman heads with the 200 cc runners and 2.02 valves and my tuned port has the factory 22 lbs injectors but has a bbk 52mm throttle body. the question is if the tpi will give the motor enough or is there wasted potential with the motor. and the computer will b tuned by fastchips.com if the tpi can handle the 383

 

Leaving a lot on the table
See
http://xtremecarzone.com.au/index.php?showtopic=386

https://www.thirdgen.org/forums/tpi/...-how-much.html

 

so my best bet for street / a little racing would b to run ported plenum aftermarket runners and atleast a ported factory base if not a edelbrock or tpis ported base with a good tune on the computer

 

Yes... what are your goals with the car? I personally like the look of TPI and think it belongs in a thirdgen. Port work, big runners, etc help, BUT if your goal is HIGH hp numbers you woud be better off with osmething else.

 

will im not looking to have a race car i just wanna have something reliable that i can drive everyday and to have some pep and without having to spend to much more money cause i already have the motor ready to go in just didnt want to choke the motor with the tpi

 

Well, it will choke it some, but will still be plenty fine for what you are looking.

If money is tight, I'd port the plenum(open up the side ports to match the siamesed SLP runners), and stock base and get some SLP runners. Also open up the inlets on the plenum to match the 52mm TB you have...

 

That is a lot of cam for TPI. What's the LSA? (I'd look it up, but you need to go through the exercise more than I do.)

 

The cam is listed good to 6500; in the link I posted you can see the 383 w/TPI is flat after 4500
Will rev to 6K but doesn't make any more power after 4500; typical characteristics of all the long runner intakes tested

 

Actually the problem with the long tube runner intakes is the cross sectional area. It is just not there for higher rpm horsepower. The after market ones have a larger CSA and help as can be seen in the above mentioned article.

Now if one was to take the First TPI intake system and open it up to its potential you would have the best of both worlds. The First base can easily be opened up to a Felpro 1206 gasket and the CSA carried on through the base. Open the runners up to a ID of 1.875" or maybe 1.9" diameter then we are talking some cfm.

Depending on motor size and cam we are talking peak power in the 6000 to 6500 rpm range. Along the way we get a boost with the 4th harmonic, 3rd harmonic and last the 2nd harmonic wave. By the way here is a link showing the different harmonic waves and strengths depending on the total runner length.

http://www.bgsoflex.com/intakeln.html

Just type in the runner length such as 21 inches.

 

Just get a Holley/Weiand Stealth Ram.

 

yea no i think im gonna scratch the 383 idea and carburate it and put it in my 92 rs and put a bone stock 350 so i can get a reliable car that i can get as many mpg i can and put back in the 22lbs injectors. i think the 383 needs the 1050 dominator not the tpi but thanks for all the info just a little more than i wanted to do to put it in.

 

and the lsa is 112 btw

 

1050 dominator will be WAY too much for a 383!

 

when you put the 383 in the 92
i would use one of the rams mini super
they'll be a investment you wont regret
bit expensive but you can find them on ebay
or used ones on different forum classifieds

 

well the 92 came tbi and i turnued it over to carb two years ago and with the 383 i think the dominator will b good cause with a little bigger cam and my dart 235 it aught to b closer to 600 hp but with my 89 anyone have any suggestions on a roller cam for a bolt on 350 tpi that is on the kinda cheaper side kinda straped on cash for a 350 dollar cam

 

How many Dominators you seen on DD's

 

How many Dominators you seen on street cars ?

 

I agree, a dominator is way to big ..a 800 maybe, 850 is to big for a 383...hell a 454 has a 650 on it from factory on a boat and remember a boat has no tranny....so it needs all it can get thru out the band !!!!!

 

well the 383 wont b in my daily just the weekend car and would a 850 really b enough for that much hp.. and any suggestions for a cam for a stock 350 tpi

 

A 750 is more than enough for that cam.

 

its not the HP..its the air/fuel ratio u need !

 

At 100% VE , a 383 pumps 720cfm @ 6500
A 1050 Dominator would let it breath to 9500