I have a 350 tpi setup now and converting it to a 383 stroker. What are good manifolds that I can use on this setup along with injectors. Any info is helpful since I am a beginner at doing this. Thanks

 

First I would suggest you ask yourself. How am I going to drive it, street, strip, weekends, restoration, show,...etc. Do you want to race, race and win because how you use it determines how much money you need, or want to spend.
Once you decide you can start planning the build, or you can just throwing parts at it and see what you end up with.
These days you can have 600+ horses and still be streetable.
I use a Scoggin-Dickey Hi-Flow Vortec lower intake base.

 

Well I did decide that I wanted to drive it on the street and street only. Am I able to use my current TPI setup with the 383 stroker, i have had a few people saw I need to upgrade the manifold and injectors, what are your thoughts. I know I what fuel injection, no carburation.

 

Keeping the TPI system, you would be lucky to get 400hp without some heavy porting on the intake and bigger runners. You would need at least 24lb injectors, a custom tune in the ECM. I would suggest, with the extra money needed to port the intake and buy bigger runners, to just upgrade to a better intake. Maybe a Holley, or mini ram. Here is a little comparison; https://www.eecis.udel.edu/~davis/z2...age021105.html

 

383 will run with the stock tpi but not very efficient. You will need a hi flow base manifold, runners and ported plenum. 24-30lbs injectors depending on how mild or wild the cam,heads and intake you decide to go with. Your only going to be making power up until 4600 rpm with the stock intake. Then the car will feel like it hit a wall. A mini ram or super ram will pair well with a 383. So it comes down to how much you want to spend.

 

I am leaning towards the FIRST for my 400 TPI build. $1200 shipped. Waiting till I save some more funds. Check out FIRST performance.
https://www.firstfuelinjection.com/services.html

 

If you're stuck on TPI, like me, then yes, you'll want a manifold and runners. I don't think anyone sells them anymore, but edelbrock made their 3860 and 3861 manifolds and shouldn't be tough to find used if you keep your eyes open. ...and of course even a ported stocker will run well. ...and then of course some higher flowing runners. ...as some have suggested though, really an HSR, miniram, or FIRST is a better choice.

Call Southbay Fuel Injectors. They've helped a LOT of members here including myself. Tell em what you've got and they'll hook you up. I went with 30 pounders for my 383.

 

Getting back to the ecm problem, when i bought the engine the guy I bought it from gave me a moates tuning setup to program my ecm so I dont think ill have a problem with that. Knowing what you guys have provided for me i am leaning towards an aftermarket manifold, what are some prices for the manifolds that you guys are talking about? What kind of injectors are good ones, I do currently have bosch injectors. With these aftermarket manifolds can I use the stock fuel rail with the manifolds and the upgraded injectors?

 

Also do you guys have any preference on stroker kits? I am looking for it to be balanced but with good quality products? Thanks

 

You will get a whole lot of opinions on stroker kits. You will need a good engine machine shop, so i would check with a local engine builder, they will probably offer better deals on kits. As for after market manifolds, you will need to get the fuel rails separately. Your stock fuel rails will only work on Accel, Edelbrock,TPI intakes. TPIS mini ram offers their own fuel rail kits. Holley HSR requires a aftermarket fuel rail. Bosch 3 injectors are very good, but with an aftermarket intake, you would need at least 30lb injectors. With new 1 3/4" headers, new intake, rails injectors, 383 machining and rotating assembly, new water pump, new distributor gear, new roller rockers, new heads, new cam, new valve covers, etc, etc, etc, your looking at around $7-$9000. Otherwise you will have a 383 with about 350hp, which you might as well stick with your stock 350. HP=$$$$$

 

Thanks for all the info guys, been doing a lot of research on the things you have been giving me, I appreciate it. One thing is I don't want to get too crazy with the horse power, I was thinking 400-450 with maintaining a somewhat stock appearance, plus I don't want to get crazy money deep into it. Would sticking with the 350 CID or the 383 CID help me with getting that much power but not using a lot of money, I know I sound like a baby with money...

 

Check out the July issue of Car Craft. Great article on a 383 TPI

 

You can get over 400hp with just your 350sb, but then your back to a intake issue again. Your stock intake will be hard pressed to get 400hp as it is. You would then have way less money stuck into it with just your 350 block.

 

Forced Induction. intake becomes a lot less of an issue that way.

 

Has anyone heard of Indmar intakes? Any comments or more information on them? All I heard is that they are used on ski boats like moomba and create tons of horsepower.

 

There's no magic in an intake. Bottom line is air in, and air out. The cubic inches, then heads, then cam, determine your potential. The intake for the most part merely supports the engine or it doesn't. Kinda like headers. They don't really MAKE power, they simply allow the engine to function without LOSING power.

...pretty sure that indmar is just a GM Ramjet. Similar, although probably not quite as good as the holley stealthram. Uses an LS throttlebody I think.

 

If you can do your own porting, fully porting the base and plenum along with grinding on a set of used SLP runner will “work”. I shifted a 355 at 5300 rpm and it ran high 12s – swapped to a StealthRam (6400/6200 shifts) and ran low 12.6s, then to a FIRST TPI (shifted 5800/5600) and ran high 12.5s in mid-80 degree temps. So the aftermarket intakes are definitely worth considerable power over even the best of conventionally ported stock intakes. That said, if you’re not planning to race the car, running the stock intake will give you the impression the car is making a lot more power than it is up until around the 5000 rpm mark. Also, if you can’t do your own porting and would have to pay someone to do the porting, the aftermarket intakes become more appealing.

If you do plan to buy an aftermarket intake, I’d skip the stock type replacements – even if you can find one used, since they’re not making them anymore. The HSR with an aftermarket throttle-body will cost around $900 by the time you’re through buying everything to make it work (fittings, fuel lines, fuel rails and regulator) and the FIRST will run in the $1,200 range (that includes a 780cfm throttle body, fuel rails, fittings, fuel lines, and regulator). They will ET about the same, but the FIRST will generate much more midrange torque and be a bit more fun to play around with. The StealthRam will be no slouch on the 383, providing about the same midrange power as a really good dual plane intake with the top-end of a single plane.

After running all three, I tend to make a very general statement that if I never raced the car, I’d been “happy” with the ported stock intake with the SLP runners (dividers removed as far as a 6” shank bit could reach). If all I did was race the car, I’d been happiest with the StealthRam – with the 3.23 gears, 3000 stall, TH350, and 26x11.5 ET Streets I had no traction issues (heat the “slicks” and floor it). In my particular application, the FIRST was the best fit for me – it had 90+% of the throttle response and midrange rush of the modified stock TPI and actually ET’ed a little better than the StealthRam (although the StealthRam trapped about 1.2mph more).

 

Just for your info; https://www.thirdgen.org/forums/engi...ow-intake.html

 

Do you still have this for sale?

 

I'm sorry, no I don't. It sold within a couple of weeks of listing it.

 

I have a 383 TPI but, like the others have said I used after market base plate, throttle body, runners and ported the plenum to match. I also had a new chip made, and changed the injectors to 30lbs. It's not a cheap under taking. But, if you like your TPI it's worth it. They are so much fun to drive.