is it worth it vs porting stock? trying to accomplish 350-375 hp with slp runners, 2032 cam, new aluminum heads, hooker headers no cat / exhaust cut out and Tuned Performance's custom tune. I've read somewhere that even at full port the stockers cant flow as good as edelbrock out of the box, but would it be worth it?

 

375rwhp? I don't know about the flow of Edelbrock's base vs a ported stock one, but I can tell you that 375rwhp ain't happening with TPI and a 2032 cam.

 

Send it to Dr Jay's for porting then it's worth it.

 

$1200 later lol. Yes it will move some air!
Good work cost money though

If you can DIY maybe worth it. Was supposed tohave some #s on this whole thing by now myself ugh. Soon.

An aftermarket with some work would be noticeable

 

I bought a Vortec version and did a light clean up on it. I would of went with a HSR but I got a set of extremely ported/siamesed SLP runners for free so it made sense $ wise.

If you have to buy the runners it is not worth it. I have a 350 with vortec heads, XE274H cam, Edelbrock tpi lower and the ported/siamesed runners and I don't think it would make 375hp. It would be close though because with a rpm air gap intake and carb the engine made 386hp.

As said above the 2032 cam won't cut it.

 

well hoping for in the range of 350 - 375. even if it means having to find more mods in the future, this is just the prelim build. i looked up comp cams though, although they might open a bit more, i'm not willing to pay for head work on brand new $1000 heads (summit heads, been told theyre re-badged AFR's).
would it be worth while to get the edelbrock? is it that big of a cfm difference? i wouldnt be able to port all the way through though, just the first like 4 inches either way. i have my SLP runners on the way, plan is to clean them up a bit, maybe send them out for siamese later on. i'm also throwing 27 lb injectors on when i get closer.

 

Carburetor motors make more power...WHY because most good intakes flow in excess of 300 CFM.
So....if you want to make power with a TPI, you have to get the intake to flow 300+ CFM

 

how much work does that require on a stock TPI manifold? I have someone who wants to sell me a stock tpi manifold for cheap, but i dont want to buy it if i should just buy an edelbrock intake later on

 

Don't buy any stock manifold, they are in the area of 240 CFM. (I throw them out for scrap)
The Edelbrock, out of the box is about 260.
It needs major rework to get to 300+

 

You could have the SLP runners and Edlebrock base Extrude honed and get close to 300 CFM.Look up Bonehead performance.The SLP's will cost you $270 to have done.

 

are the stock at 240 cfm stock or with porting? I'm leaning toward the edelbrock, i had already ordered the SLP runners a week ago. any idea where the cheapest place to buy them is? summit and jegs have it listed at like 460

 

basically, i'm just trying to find out if the edelbrock in take manifold will net me any gains. I understand more cfm can mean more power, but i'm having a difficult time finding any reviews or threads anywhere of folks saying if it netted any power or not. like i said, my project is to try and make 350-375 hp, but i'm curious if the edelbrock intake will help or if i just have the stock manifold ported fully would it have the same amount of increase of power, if any.

 

20 cfm difference -yes a gain wont feel much
Had a friend yrs ago who did dyno/track testing with that and got 12rwhp. Not much but something
Not completely going through the SLPs not worth it.
Some put a big ol gaping hole up top hoping it will do something just makes a big ol gaping hole.

20cfm doesnt sound like much. Ifyou look at the 2 bases side by side the difference visually is huge. Takes a LOT to get a little gain out of a Tpi intake via grinding.

 

You won't make 375 crank with a stock base.

You will be 30 hp short with a unmolested edlebrock.

 

ok, then i think i'll try going for it when i save up enough. i had a lead on a stock intake manifold for like 25 bucks, (would have needed work cuz it was an 86 manifold) but i've got bitten by the "i want to make more power" bug. other than slp runners, intake manifold, crane cam, 27lb fuel injectors, custom tune by tuned performance, headers, summit aluminum heads, and of course and aerofoil......any other bolt on suggestions for power? (no i'm not going to do a HSR)

 

You need to read the thread on here.The one for[ In search of a better flowing TPI] all the info you will need is in that thread.It's long but well worth reading.

 

Iv got a stage 4 MAX-port (1.75" ports)

READY to bolt and go.

$650 shipped

-will post more spec later if your interested.

 

Why are you so against the HSR? If you have to buy a TPI base and runners then mod them, you will be into it almost double of what the HSR costs.

 

$650 for a base, is it coated in white gold !

 

Here is a write up of different tpi bases tested against each other.

I went with the TPIS bigmouth and sent it out to Dr. J's performance to have it ported and welded by them.

http://www.americanmusclecarsaustral...p?topic=2373.0

 

What? No, its the WHOLE intake...

 

thanks guys for all the input, firstly, i've dipped into the "quest for a better flowing tpi" thread a couple times, i just dont have the patience to read through all of it honestly. I'm not against the HSR, i think that it is nice, i am just not looking to get into any more work than i'm already in with swapping motors (first time doing a motor swap) and i dont want to have to modify more such as cutting fuel lines and such. I like the look and the torque you get out of a TPI, its just a personal preference really. I was just trying to get your guys opinions on if its more worthwhile to get a stock intake manifold and eventually send it out for boring or to just get the edelbrock and do DIY gasket match basically. This isnt going to be a race car, i just caught the "power bug" and wanted to keep the stock TPI look with the runners and all.
at this point, i'm starting to think maybe going with the stock manifold for $25 bucks and seeing if i can barter my 4 stock cast iron heads at a local machine shop to have them open up the stock manifold as large as it'll go.

 

Here ya go, it was 2 post below yours. https://www.thirdgen.org/forums/engi...lo-ported.html

 

looks like a good setup, unfortunately its out of my price range since i already got the slp runners in yesterday.

 

Heres a accel base
https://www.thirdgen.org/forums/engi...stom-fuel.html

 

took a look at the listing, it looks solid, i then took a look at my checking account before PM'ing him (just to find out what my best offer would be) and to my surprise, found a little minus before a grand total in my checking, apparently a couple of purchases took a few days to go through and my bank decided to hit me with the service charge 4 times....looks like i'll be going with the stock intake manifold afterall lol
thank you guys for all the help and insight to this stuff, hopefully i can take the knowledge i gained and apply it in the future to an HSR or better intake manifold. dont know if you guys want to keep the thread alive or not, thanks again for the help

 

Home port the base and plenum and if you get a deal buy some runners or maybe a base. Otherwise buy a diff intake, tpi can be a lot of $ with poor return. TPI also can perform w/o big $ parts, but unless your willing to research and do the work go another route. Ignore most the false claims and scrutiny.