Warren928

I have been carefully considering my options for a high HP shark. My 85-86 US model is itching for more power. Can anyone show me specifically the parts combination to use for a SC kit along with engine bolt on's to make 600-650 Crank HP?

BC

650 crank? So about 575 to the rear wheels.

Well, tim's kit with a few changes is 550 I think to the rears. Thats 14psi - and the original injection and ignition system, which is stretching its bandaid nature at that point (IMO)

I'll be coating my pistons, and running an AEM, with no MAF (but MAP) - and I hope for about that number.
Maybe some bigger valves in those 85/86 heads. (I know people will say otherwise).

pvoth

427 ci small block chevy makes around 600 ponies

mspiegle

I don't think any of the SC guys have tested their kits for that much power on an 85/86. What do you plan to use the shark for?

blau928

The real answer is "it depends on what you will use the car for." Will you run 91 octane gas, and drive on the street? or will you use 100 Octane and run on the Track..? Manual or Auto trans... There are many more questions that you should ask before bolting on such an advanced power setup...

For a street car on low octane gas, You will need to use lower compression pistons for sure.. At that point, you should also think about heads and cams etc.. The trans will grenade if it is not an auto.. You should seriously rebuild the engine before going to that power level, as you will certainly get addicted quickly, and if the internals are not in order, you will have to rebuild the motor anyway...

Either system is capable of making the power if set up correctly.... So, you see, it really depends on what you want to use the car for... At least you will be starting with the thick wall block...

Good Luck,

blau928

Oh,

I almost forgot... How much can you spend is the real "short" answer to your question...! If you have a budget large enough, you can get any amount of power you want...

Cheers,

Shane

I'm buying a spare engine, Warren, so I'll be interested in the answers you get. I plan to try for 500rwhp on my 5sp with stock configuration.

Z

His last dyno was 556rwhp at 12-12.5psi. The car's at 14 psi now, but hasn't dynoed at that boost level.

Warren,
It depends on what you mean by "engine bolt on's". Usually that means just stuff that's bolted on without going into the engine to any great extent. Don't get your expectations up too high on reaching that 650 crank hp without getting more involved than just bolt on stuff and a supercharger.

Mike LaBranche

427 would be a big block. Largest small block is 400 ci. good for 425/425 stock with a 4 barrel. Add a cam, headers,etc and you're looking at about 500.

600 rwhp? Geez.... in a 928. I'd say a stroker, plus a conservative blower. Or you can push the envelope and bump the boost on stock displacement, intercooling required. But what do I know? 250 rw ponies exiting a corner at the limit is a lot of fun too...

sublimate

Nah, you can get small blocks up to 454ci:
http://www.jegs.com/cgi-bin/ncommerc...22&prmenbr=361
The new Vet is supposed to have a 427 SB too.

GoRideSno

Unfortunately the answer is no. No one can show you this because it has never been done for an 85-86. All attempts to answer would be speculation.

You could install an S4 engine, wiring, computer, then do full exaust and get up to 513rwhp/604CHP with Tim's kit. This is the highest using stock engine and only bolt ons (exhaust) yet.

As far as I know Shane has the highest powered SCed 85-86 with only bolt ons using my intercooled twin-screw setup at 402rwhp/503CHP. I'll add that Shane's is the quickest 85-86 that I know of too at 0-60 in 4.6 sec and 1/4mi in 12.5 and 108mph on street tires and automatic trans.
The only bolt ons that will get him any higher are headers and full exhaust. He can and will get some more power from the SC setup this spring though.

I'll add too that I make the only intercooled SC setup of any kind that fits the 85-86 engine.


Andy K

BC

Have Shane turn up the boost and lets watch.

Shane

Funny!! .....but true as that is what I'm going to do!

Will probably need to reinstall the 30lb injectors to run more boost but

IcemanG17

Warren
600+Crank HP will be a bit of a challenge for an 85-86. Possible with an S4+ (after lots & lots of work). In theory a 6.0 to 6.5L supercharged engine should easily blow past those numbers...but that would take months and probably 30K+ to make it run right...but damm would it fly....probably 700+whp!

Warren928

I had some thoughts on the 600-650 crank hp setup. I dont know if it will work, but here goes...

1) One murph or Supermodel intercooled SC running 8-9 psi
2) Dual 3" exhaust with high flow cats, all stainless.
3) MSD Headers
All this is maybe worth 550-575 crank hp, or at least I am speculating here.

4) Finally, add a 50-75 "wet" shot of nitrous to add hp and cool the air coming in that is heated from the SC. This will eliminate further stress on the ECU and injectors to manage more fuel for that HP increase.

Anybody see potential problems with this setup?

BTW, my budget is expandable with the parts needed, but my goal is to tweak the 928 out to make the first "stock block and heads" 600+ CHP 86' 928. My car is an Automatic.

My purpose is to have a car that goes like a bat out of hell. I've owned a 2600 lb car with 400 hp and it was alot of fun, and to get the same performance I am looking at 525 chp for the 928. But I want to move the bar up a notch and go even faster. It will see the track and will definately see the street.