Well im starting the 305-350 swap, As soon as I can get this damn 305 to just blow up! lol

Here is what I have in mind

355/357 not for sure any input on what is better, It will have forged internals , Will be running n2o (150-175) But anybody know of a good cheap set of heads? I have looked at the world heads seem to be the cheapest give or take 800, Looking to spend about 1200 on heads and a cam.

Me and my brother just installed a zz4 cam in his mostley stock 350 tpi it sounds good but im looking for a little more, ( he only hase 1.5 rockers maybe with my 1.6 rr it will sound a little bigger( with 1.6rr makes it 505/544 lift)

And from what I have read is all that I need for the

Injectors
Knock sensors
prom

Also would a stock 91 350 tpi prom work ok ? or does it need to be modified.

So pretty much what I need to know what is a good cam and heads combo that are pretty cheap, I will be running a TPI on it, I think that is all any suggestions or answer would be great.

 

Build the 350 before you're walking.
Neither. One just has .010" more bore.
Which do you want, good, or cheap? With nitrous, you shouldn't plan on anything being cheap. Modified Vortecs are probably your best bang-for-buck. $1200 is going to be a little short if you have a roller block and go with a roller cam.
Modified.

 

Since you said modified . Where can I get a modified 350 prom?

Also what is a good brand of heads at a good price?

and the same question with the cam.

Im looking to run 13.0 or really close to that all motor. with this.

355/357 one of them

aftermarket heads
mild cam
stall
1.6 rr
drag radials
fully ported tpi setup
3.73
long tubes / true duals


Anything else ?

 

Check the TPI and DIY PROM forums for information about PROM tuning.

www.sdpc2000.com Check their engine components link for Vortec cylinder heads. They're GM castings. Go with the modified heads for more lift than stock. Aftermarket = more expense than necessary to get 13.0's.

Comp XE268 cam. 1.6 rockers unnecessary.

What's with the "355/357" stuff? A "355" is a 350 that's been bored .030" over to clean up the cylinder walls. A "357" is a 350 that's been bored .040" over to clean up the cylinder walls. They're rebuilt 350's, that's all.

Long tubes aren't necessary. O2 sensor is necessary. Duals kill ground clearance. Just go with emissions-legal shorty headers, y-pipe, and stock 3" routing exhaust. 13.0's aren't that hard to get.

 

When I say 355/357 that just means one or the other not for sure on which one yet.

I have shorties now (edelbrock) But Im thinking these pacesetter mid tubes with the o2, I prob will be taking my air stuff off the car anyways.

What about a set of tpi vette heads? Are they good heads maybe some info on them. And thanks for the replys I would be lost without this.

 

They're the same engine. There's no meaningful distinction to be made between them, they're still 350s.

 

I no that there is no diff im just telling you that it will be one or the other.

I dont think I want to go with vortec heads cause I dont want to buy a new intake.

Any ideas on heads and a cam ?

 

Then don't bother with it.

It's a 350. Not some other number. As has been said, those other numbers are merely the CIDs you come up with depending on how much maintenance has to be done to a 350 block; not some other size of engine. It's still a 350.

A used Performer RPM is about $100-125. Certainly not an obstacle to buying better heads. If it is, you need to just stick with what you've got and forget about how fast it will go.

For cheeep and fast, it's hard to beat Vortec heads, a Performer RPM, a Holley 750, and a Comp XE268 (or XE262 if you want something a little more "mild"). If you're keeping your TPI setup, forget all about "cheep", because you're going to have a tough time getting anywhere near 13.0 without spending some serious $$$$$ on aftermarket stuff.

 

Who cares 350/355/357 it doesnt make a diff

Im not goin to make my car carbed, Just a personal thing that I would never run a carb over f.i. I just really like f.i better than carbed.

 

That's exactly the point.

 

Hey, as long as the guy isn't considering a 335.... That gets you 10 internet lashes

FI is fine and dandy, but your budget is all of a sudden ridiculously low. FI costs a whole ton more to go fast with, that's why all of us love carburetors. It's not that we enjoy getting less mileage and harder starting, it's that it's SO much cheaper.

 

Yea well can you help me with a good set of heads and a good cam idea?

Any suggestions?

 

That depends on EXACTLY what displacement it's going on

sofakingdom gave you one of the most popular (for a reason) combos out there, vortec heads, xe268, performer RPM intake, holley carb. You can do that with TPI, but you'd need a vortec TPI base, and an xe268-14 (higher LSA makes tuning it easier).

If you're against vortec, then the price jumps pretty noticeably. Aftermarket heads (aside from vortecs) are in the $900-$1300 range. Vortecs are the $500 head set, that's what makes them so popular. $400 buys a lot of gas/groceries/slurpees/lap dances, whatever floats your boat.

 

Yea then how much does the intake cost that goes with the heads? And where can I buy one?

The only rason I really didnt want to go votec is b/c The cam is only 480 lift And im guessing that is with 1.5 rockers. And I have 1.6rr.

What is a good cam for vortec heads?

 

i believe the vortec base is something like $300 so to go with upgraded vortec heads (which will allow more than .480" lift cams) and that base, you would be right at the same price as the stock tpi manifold and some good aluminum heads. If it were me, i'd just get some pro-action or RHS aluminum heads, and they can handle that cam with 1.6 RR's

EDIT the vortec base from scoggin dickey is $460...

 

I have found a set of heads that doesnt seem to be that bad, They flow better than the vortec's they are 185cc to the vortec's 160cc

And they will work with my stock intake

Have anybody heard of bowtie heads?? good or bad?

 

With TPI, bad. Vortecs better.

 

Really I have read alot of good things about them? What is so bad about them on a tpi motor.

I dont see how you can say vortec is the cheapest way to get heads b/c you have to tac on the intake to that, and with total cost you might as well just buy some aftermarket heads b/c the price will be about the same?

Heads= 599.99
intake=460.00
+tax/shipping

$1100

When I could find a nice set of heads for the same price? dont make sense to me and I can even run a bigger cam with a diff set of heads?

 

TPI is too restrictive and can't flow enough air to fill the Bowtie heads.

 

TPI is a tuned pulse system that in intended to give good seat-of-the-pants off-the-showroom-floor feel. It isn't made for power. To get that low RPM torque, it uses small runners that keep flow velocity high. That set-up with Bowtie heads would have the flow dashing down the TPI system and dieing in the large Bowtie heads.

Might work okay with one of the aftermarket EFI manifolds like Miniram.

Most any aftermarket head you could get that would make better power than Vortecs would not be a good match with stock-like TPI.

 

So it would be bad to run bowtie heads on a fully ported intake,plenium, slp runner?

 

"Bad" probably isn't the right word. "No better than Vortecs" is probably a better way to put it.

I haven't heard glowing reports regarding fully porting a stock TPI base. I can't see it being a good match with the Bowtie heads.

The Vortec base is based on the Edelbrock high-flow TPI base. With shorter, fatter runners, ported plenum, the Edelbrock base does alright. Up to a point.

Ported L98 heads would probably do as well as anything under a ported stock base. You're going to spray it, anyway, so that's where your real power is going to come from.