I've got a line on a 383 minus heads, distributor, water pump, and maybe a couple of other small parts.. but the core only has a couple k on it since build.. it was in a car that burnt down, so a few of the externals are torched. Also if I can't get it to run, it's free, so I might as well give it a shot. I've also got a line on a 305 that was rebuilt, but never reassembled.. includes heads, dist, exhaust manifolds, carb, intake.. just about everything I'd need to get the 383 to fire up.. problem is I'm kinda new to this and I'm not sure what parts are similar enough to work.. while I expect the 305's heads to be able to bolt on, I'm worried as to how high this will bump the compression ratio, etc.. flat out unsure about distributor and other parts.. info appreciated.

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'86 Camaro SC, black /w silver racing stripes
2.8l MPFI/700r4
In search of new v8 engine & transmission
MSD coil, Accel 8mm wires, SplitFire plugs, Gabriel hijackers

 

It will bump up the compression but will also choke the engine. 305 heads won't flow enough air for a 383 to be any good.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
454 Big Block almost ready for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Altitude corrected rear wheel HP based on power to weight ratio: 476.5
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

 

i think the compression will be high granted, but 305 heads dodnt flow past about 3500-4500, so i wouldnt use them just get some good 350 heads!

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1989 firebird formula

Mods: converted from T.B.I. to a carburator 305 to a 350. Flowmater exhaust,hedman shortie hedders,202 heads,350 horse cam,bored.40 over, Edlebrock torker2 and a 600 edlebrock manual choke.

Future mods performer rpm air gap intake (polished) comp roller cam, and way better headsa 400 defintely in the works!

 

I can't afford much else.. the 305 would be basically free (trade of a computer for the engine)...

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'86 Camaro SC, black /w silver racing stripes
2.8l MPFI/700r4
In search of new v8 engine & transmission
MSD coil, Accel 8mm wires, SplitFire plugs, Gabriel hijackers

 

In this case, "free" is actually a waste of money. Whatever you spend on gaskets, a transmission, fluids, etc. etc. etc. will be largely wasted by attempting to run that combo. It would be a little like going out and buying a Mylex RAID controller and hooking up 2 330M Seagate SCSI drives from a 386 Novell 2.x server to it. Sure they fit, but why bother?

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"So many Mustangs, so little time..."
ICON Motorsports

 

Rb, Because its Cool!

Running Old Hardware beyond its limits always appealed to me


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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype

 

i once tried to put win95 on a 386 and it puked on me ;\ on the other hand now it serves as a ... um, ashtray?

 

I'm just asking if it will run, not if it will run anywhere near its abilities. I've got a dying car on my hands and I'm in desperate times.. I need a point A to point B.. even relativly short term plans don't include leaving these heads on it.. only for a couple months. Would porting them to their limits bring this posibility up?

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'86 Camaro SC, black /w silver racing stripes
2.8l MPFI/700r4
In search of new v8 engine & transmission
MSD coil, Accel 8mm wires, SplitFire plugs, Gabriel hijackers

 

the pistons will probably interfere with the heads since the bore on a 305 is sooo small.
it is true that they don't flow well.

and the comment above about 305s not revving is not quite true. With pocket-ported stock heads and a nice cam, my 305 runs to 6000+ it really is a screamer!!

 

well, it would probably run but not very long because you'd detonate it to death unless you ran 110 octane or so. I wouldn't try it. You can pick up a descent set of heads that would work better for little money. first thing you need to do is determine what type of pistons the 383 has and then search for a set of heads that will gain you a liveable compression ratio. More than likely you'd end up with 11.5:1 or higher compression with the setup you speak of.

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Kyle Osterholt
Okarche, Oklahoma
ASE Master Certified
86 T/A 383 TPI
89 TTA #1002 T-top/Leather
89 TTA #1358 Hardtop/Leather
80 T/A Pace Car
73 Opel GT
73 bronco

 

Physically they will fit but as snake said, it will bump up the CR ratio so high that you can't run anything less than like 100 or higher octane. You can thank the small 58cc combustion chambers on the 305 heads. To run 93 octane pump gas you can't have a CR above 10:1. You will need to buy VP racing fuel which is like $4-8 a gallon if you can find it. Its usually at race tracks only.. I've only seen one gas station with it before. You need to find at least a 64cc SBC head. Those heads would be a waste of money to install and would cause damage to you motor if you run pump gas with them.

 

Oh yeah and to save money I have tried the octane booster once on my 327 with a 10:1 CR which needs 93 octane. I tried the 87 and octane booster to save money and well I will never use it again. Anytime I accelerated hard it would detionate bad. So personally I don't think it works.