hey guys, im gonna swap out my crap 305 LB9 for a 350. what are all the options i have for 350's? like any corvette motors i can put in? L98's? what are my options, im gonna convert whatever needed over to the 350 anyway. any help would be appreciated.

 

Any 350 is a good 350 - as long as it runs. They are all the same for the most part - heads, cams, and other various items change, but the blocks are all the same - part of the beauty of SBC.

 

With the ever increasing competition, I wouldn't bother with an L98, or any 350, for that matter. I would definitely consider going the 383 and up route...

 

you need a 350 to make a 383........but yes i see what your saying.

 

305 to 350 is a good choice let me start with this observation because i just did this mod myself before buying a block an heading down to your local machine shop take a look at some crate motors it sounds to me like this maybe the way to go prformance an cost wise you can save serious time an money taking this route my buddy recently put a zz4 motor in his car has about 4 grand start to finish an is running in the high12s verse me having 6500 in mine sure i have a ton of forged parts an aluminum heads but all that got me was about a half second. dont get me wrong i love having bragging rights but all im sayin is he is 2500 closer to his paint job an lovin his car im glad to have him as a friend an im glad he listened to me. you are going in the right direction buy asking ?s just think the hole project through and have fun

 

Really? Didn't know that... j/k

Yes, I'm aware that you need a 350 to make a 383, as well as a 406, for that matter. My point was in reference to cubic inch displacement, of course.

More cubes, more torque.

 

Like everything in life, depends on how much you want and how much you got. If your wallet is deep, you don't mind 10 mpg, go for it! I had a shallow wallet, had no desire to lose my license on the street, and no time for the track thing (I wanted a daily driver) - so I settled for an $800 used (1969) but freshly built 350 (pan to carb) - which after all the goodies to swap cost me about $2000 total including a tranny rebuild to handle it. But it made all the difference in the world to me over the 305, fit in my wallet, and made me happy

Getting happiness from Your Wallet is all that really counts! In the end, no matter what you do, someone will come along and top it.

 

ah totally what i was tryin to say and a mistake that i made many times i took the same approach you did and had a lot of fun with the car and then seein my buddy approach his in that light. and then the way i did it demanded alot of sittin around beatin my head on the wall wandering if id ever get it done alot of little things that you dont think about untill your knee deep just remember tink the project through what do you want and what kind of time frame are you wanting to get it done. an amen to those 1969 350 small blocks im running a 1984 cutlass with one backed with a 700r4 an 2:73 gears with a auburn an knockin down about 25 miles per gallon thank god for the quadra jet

 

i know j/p, lol

 

if your serious iroc man im in your neighborhood been down the road your talkin bout you shanga east or west

 

i live in wisconsin buddy, lol.

 

oh fort wayne has a strip club shangri la lol i thought you were gettin down being on probation and all

 

 

Shizzz, this kid oughta be on parole with his antics! But dude, sell the 305 and pick up an old 400 SB. Rebuild the shortblock with new parts and throw a decent cam and a ported set of iron heads on it. Then... slide it under Your TPI setup, match it with a decent exhaust setup, get a chip calibrated for Your setup... and You should have a torque monster under the twitch of Your foot. Were talkin 425 lb feet on a minimum budget. Just an idea, because 400's are relatively cheap and 350's ain't all that!!!

 

i agree a 400 would be a nice motor to pick up if you can find one the reason i stay away from the 400 is the fact it is hard to find a good one these motor ran warm and cracked but if you can find a good one id grab it up over a 350 but i used a 350 because of past experience and high cost of getting blocks fixed

 

with camaronewbie People are going to tell you everything from carbed 350-383-406 LS1. I was in the same problem you are in and I was going LS1 then LT1 then LS1........ so to cut a long story short I am going LT1 I know some of you might/will say nah But then again I agree with camaronewbie

 

i think you made a good choice if your running fuel injection if your a carb guy still a good choice havent seen a ls1 with a carb on it yet and lots of parts for this motor at decent price good choice but what can i say i like workin with the older stuff

 

ya, i know a guy who has a 400 engine out of a race car. if i got that, would all of my TPI stuff needed to convert, work? and how much hp/torque would i get out of a stock 400 engine with ported heads and my TPI stuff?

 

anybody?

 

"400 engine out of a race car"

"stock 400 engine with ported heads"

Those are pretty ill-defined terms. A race car could have any sort of 400 in it, from box factory stock to maxed-out. You really have to know which it is in order to answer the question.

Stock 400 heads are pretty much junk. Porting doesn't help much. Ported LB9 heads with 1.94/1.60" valves would flow better.

TPI is about big enough for a 305. Putting it on larger engines serves to choke them off. It will run, but a stock TPI on a well-modified 400 is going to be a severe limitation. You might get over 400 lb-ft out of it with a mild cam, but more than 275 HP would be incredible.

 

well might not be perfect definitions for you, but if you look it says a stock 400, not a race one, not a modified one, i mean a stock chevy 400 small block engine. with ported 350 heads on it, and a ported plenum and larger intake runners, with just that stuff on the a "stock 400 chevy small block" how much hp and torque do you think i would get out of it?

 

hey five7kid, i just found out it has 202 racing heads or something like that.

 

so basically in all, its a chevy 400 with 202 racing heads and i want to convert it to TPI, so if i port the plenum and the runners, and get a edelbrock hi flo intake, how much hp and torque will i be looking at with just that?

 

Without knowing your dynamic compression, as well as cam specs, it's impossible to even take a guesstimate. Also, I would seriously consider a Holley Stealth Ram if it really does have 2.02 heads...

 

where would i get a cheap one that would go well with my application? cause i really dont wanna go to carb.

 

would this work with my application?


Holley Stealth Ram EFI Intake Manifolds: HLY-7540 - summitracing.com

 

Just be sure to go with the HSR manifold only, and not the entire kit. Your stock ECM system will be fine, just be sure to go with bigger injectors though... as well as an L98 (or custom) chip. As for camshafts, how much rear wheel horsepower are you looking to achieve?

 

so only get the manifold in that kit but not the entire kit? i dont understand what you said man. and you said go with bigger fuel injectors?

 

i dont think they sell just the manifold do they? i think it comes with everything. but why wont the whole kit work?

 

as for real wheel hp, and torque, i want as much as possible for a lower price.

 

You said a 400 out of a race car, and then you asked about a stock 400. It could be assumed that you were talking about the same engine, but it wasn't clear that you were. Assumptions usually lead to improper conclusions, so I wasn't going to assume anything.

"202 heads" probably means they have 2.02" intake and 1.60" exhaust valves. That is commonly done and was even done by the factory in stock 400 882 casting heads. That doesn't make them "race heads", and in fact they still aren't very good heads. A TPI with the typical "RV" cam would actually work pretty well on a stock headed 400, because the heads and cam are going to keep it from flowing well enough to overwhelm the TPI. A Stealth Ram would be pearls on a swine on such an engine. Unnecessary. Unproductive.

In order to justify a Stealth Ram, you need real performance heads, whether it's a 350, 383, or 400. Ported stock 400 2.02"/1.60" 882 casting heads ain't gunna cut it. But, a stock TPI with mild cam would probably work well on it.

 

so i wouldnt need anything? just swap my tpi stuff from my 305 to the 400 and thats it? wouldnt i be better off getting a new intake and stuff? or atleast porting the plenum?

 

i thought you justed posted a while ago that it would "choke it off"?

 

oooo nvm, you said on a moddified engine, sorry. so with all the info i gave you, a chevy 400, with 202 heads, stock TPI system and mild cam, how much hp and torque and i looking at? around?

 

you are only looking at around 325hp and 325 - 375 Torque, which is good, but u better upgrade tranny and driveshaft and rearend with it!!

 

i'll be fine as long as i dont beat on it.....to much. hey 325 is awsome hp compared to the crap 305 i got now.

 

The Holley Stealth Ram kit is not necessary, as the kit comes with fuel pump and ECM. Its pretty expensive, especially when the stock ECM is adaptable. The intake alone (unpolished) is only a few hundred dollars, and lately, I've seen them selling for used pretty cheap...

You'll need bigger injectors to compensate for the additional cubic inches. 400 is a pretty big step over 305, and the stock setup simply won't cut it. You'll need, at the minimum, L98 injectors, along with a L98 chip. An ajustable fuel pressure regulator is favorable, as you'll want to be able to control the pressure, because you'll more than likely have to bump it up to get it running just right...

Your 400 heads might not be the best heads at the moment, but this is why you'll need to determine dynamic and static compression. They already setup to flow decently, but I would highly suggest a three angle valve job. With the right compression, and cam selection (trust me, invest in a custom camshaft, today's lobes are very advanced), and tuning, you'll be pushing way over 400 rear wheel horsepower...

This is why I asked you how much power you are looking for, as the potential of your new setup is great. It's all in the heads and cam, as well as your tuning abilities. Be sure to complement everything with a free flowing exhaust system...

 

A 400 is a pretty nice way to get 12's out of a 3rd Gen. I used L98 heads that the machine shop drilled the steam holes in. Only port matching was done.

A cam almost the same as a Performer RPM cam and 1 3/4 headers (slp type); don't forget the custom chip work you need!

Your TPI is too little flow; you need the stealth ram intake. You can get it separate. Just keep looking; and there's always ebay!!

Good luck!!

 

that kit is only $300 though, cant i use the runners and plenum that comes with that intake to? or will i need to use my stock ones?

 

i think this kit comes with manifold, plenum, and runners for $300.
Holley Stealth Ram EFI Intake Manifolds: HLY-7540 - summitracing.com

thats what i want dont i?

 

Well, that appears to be it!

Don't forget that you need the LT1 or aftermarket throttle body. It says that at the bottom right hand of the page with all of the descriptions in your link.

I have seen many guys rave about that thing after changing it and nothing else! I think you're gonna be happy with it. If I was gonna build a small block chevy, I'd probably use it. I love TPI except for the manifold. I have customized manifolds to get rid of the runners on TPI units and everything I've done (even some aweful backyard stuff) has given an improvement over those things.

You should be golden with that setup!

By the way? Why are you on probation? (Please don't say anything that will get you into more trouble!!!)

 

so i need to use the stock fuel rails or something? and do i need to use anything else of my stock stuff?

 

Man, I'm looking at your summit link again and now I'm not so sure...

Will that thing fit under your hood? I thought Holley made one that replaces the TPI intake and fits under the hood...

Anyone else know for sure????

 

im planning on getting another hood anyway, or cut a hole in the middle of mine, lol.

 

The Holley Stealth Ram is a direct replacement for your TPI. The stock throttle body will bolt right up, but I highly suggest to step up to an aftermarket throttle body with at least 52mm (58mm would be ideal) if possible...

You'll want to order the Satin Intake Manifold (p/n HLY-7540), which is $299.95, along with the Fuel Rail Kit with adjustable regulator (p/n HLY-534-186), which runs for $219.95. This kit will definitely clear your stock Iroc's hood (its the Corvette's that have hood clearance issues)...

Once this kit is installed, again, bigger injectors, set your fuel pressure to stock psi, then raise accordingly (when tuning), L98 (or custom) chip. The MAF will compensate somewhat for the rest, and it will run and drive fine (so long as you don't go too crazy with your cam selection) but to get it running right, I highly suggest a good tune from a reputable source...

As you work on your heads, be sure to install some very good valve springs. Todays lobes will make mush out of the stockers, especially if you go the LSK lobe route. Remember though, dynamic compression, duration, lift and LSA, will help catapult you into the 11's with absolute ease... provided the rest of the car is up to it, that is.

 

so this kit from summit wont work then? cant i get that kit and then get the fuel rail kit?

 

nvm its the same kit, my bad

 

thanks street, i got all the info i need for now!

 

one more thing, how would this cam work for my application?

COMP Cams®: Chevy 262-400 Xtreme Energy Computer Controlled XE268H Cam & Kit=

 

I would seriously consider contacting the people over at Thunder Racing as they can custom tailor any camshaft you'd like, for less than what that CompCam is being offered for, trust me.