I have a stock 305 5speed gta.

I am getting this 383

http://cgi.ebay.com/ebaymotors/Chevy...em290213005859

What do I need to change to get this to run properly?

This is the list I have so far:

1) Clutch
2) Injectors
3) ESC
4) Prom

Can anyone think of anything else? Also does anyone know where I can get a prom that would allow this car to run properly?

 

She's purdy. So what are you asking? You want to put your TPI set-up on this motor? It only says "GM heads" do you know which GM heads they are? Hopefully they're not Vortec(actually it would be kinda cool, but you'd need a new lower intake). I think you got everything listed. You will definately need a custom PROM to get the most out of it but it will be worth it.

 

your gonna put stock TPI on that motor correct? i'd upgrade the runners/base to get more flow for that thing, it could use it.

Not sure what heads are on it, i'd find that out first.

everything else looks good, you just need to put a knock sensor on that motor and a fan switch/temp sensor in the heads. then swap over the accessory bracket mounts from your stock heads and block to the new block...thats all the basic stuff you'll do in the swap

 

Yes I am definately going to put the TPI setup on it. I don't really have any extra for upgrades though. Essentials only.

Sounds like the change over is a pretty simple process. Do you think the car would run with the stock prom and injectors?

Do 1988 model intakes have a different angle for the center intake bolts? That was the only question the guy had for me.

 

it may start but i doubt it will run well with the stock prom and injectors.

i do believe 87+ manifolds had a different angle for the 4 center bolt holes. Its not straight up like on old style heads or the aluminum L98 heads. Not a problem tho as you can drill/grind them out to make it work.

 

Should make about 290 horse with a stock TPI set-up on it.

Which is about what a stock L98 made (since the L98 rating was net flywheel HP, and these crate engines always advertise gross flywheel HP). You'll get more kick down low over your 305, but it'll totally die above about 4000 RPMs without TPI upgrades.

Oh, and kiss your T5 goodbye unless you absolutely baby it.

 

Can I get an older lower tpi intake instead of drilling the heads? The guy I am going to buy this from says he can drill the heads when he builds it, but I would prefer to not do that.


So you're saying this is going to make no more power then a stock 350? Why get this over a reman motor then? I can get rebuilt l98's for 1300-1500.

T5s are that weak huh? When you say baby do you mean no gunning the car?

 

You got me wrong, i ment drill out the manifold to have flat faced bolt holes to match the iron heads. DO NOT DRILL THE HEADS. My HSR is build to fit both style heads, it has both bolt hole styles drilled into the face. It seals just fine so there is no worries

Else you can get a older TPI manifold from 85-86. Or possibly a corvette manifold.


you'll make alittle more power than stock L98 if those heads are somewhat ok heads. Mainly you'll make TONS more torque. BUT your leaving alot on the table with stock TPI. YOu can always upgrade intake parts later tho if you cant do it now

And yes T5's cases will flex alot and can easily throw gears out of alignment which will lead to broken gears and such. So you cant drive the car really hard all the time and expect it to hold. The biggest thing that will kill that trans is powershifting it, and drag strip launches on slicks/drag radials where you drop the clutch hard

 

Ok, I will definately tell him not to drill the heads. Is there a particular year corvette intake that I need to look for?

That's good to know I will make more power then an l98. I would not waste the money if I wasn't going to. Plus torque is what I really want. I love just pushing the pedle down halfway and still having a good pull.

Sounds like my t5 will be allright because I will NEVER use slicks or speed shift.

Thanks for all the help guys!

 

Any year Vette, and '85-'86 3rd gen. You just need the base, not the whole intake system.

And no high-RPM clutch dumps, even with street tires.

 

yep, go to ebay and you'll find stock vette bases all day long for 20 bucks. Else checkout Corvetteforum

I'd seriously consider porting it out abit and/or siamesing the base alittle to help that 383 breathe


And yes, no high rpm clutch dumps

The biggest thing you need to worry about now is getting a tune for it. Find out what heads they have on that thing, and the compression ratio/cam specs. You can try to find a mail order place to see if they can do it or get it close.