well you have made a vary remarkable statement. The only way i think everyone is going to believe you is whith a dyno slip...

 

yep the dyno slip! boring a 3.2 to 3.6 is on the extreme!

 

I am not saying it is impossible (cause it definitely isn't), but the way you word your posts makes me think that I will have to see proof to believe.
Does anyone know the stock bore and/or stroke to the engine so I can compute the overbore.

By throwing in a generic guestimated stroke, I came up with some outrageously high overbore specs. Hmmmmmm... maybe he had it stroked????

One last thing-- Who makes a vortec supercharger; I have never heard of it. I thought GM was the only manufacturer to use that term.

 

i tryed to find 3.2 bore specs but thats a joke and i got 3.0 specs 3.504 bore and 3.1496 stroke. At .080 a 3.0 becomes a 3.1. He said it was bored but i first said it would need stroked! who knows but its not bored from 3.2 to 3.6 i know that much.

 

fordeverpower-- I just reread the first part of my post, and it may have sounded like it was directed at your post right above mine. I wasn't doubting your knowledge; sorry if it sounded that way. What I was doubting was the original poster's claims.

Wow! At .080 over it only gains a liter. Yeah, something's fishy.
thanks alot for the info
brad

 

Another way to add displacement is to add stroke. In order to accomplish this the factory forged crankshaft has to be welded and offset ground with 3.5’’ stroke vs. 3.15’’. When combined with 3.622’’ overbore total displacement reaches 3.6L, a 20% increase.

Kit comes with following:

3.622" Bore Lightweight Forged Aluminum Pistons Piston Pins and Retainers
Custom Welded Forged Crank w/ 3.5" Stroke Set of Chrome-Moly Rings
Set of Main Bearings Set of Connecting Rod Bearings
Oil Pan Gaskets and Seals New Oil Pump



Supercharging, on the other hand, is fairly maintenance free, it never needs refills, offers power at every throttle position.

Supercharging is a great way to add HP and TQ. On a properly built engine, gains of up to 100% are possible. In our kits we use a Vortech S-trim supercharger. This unit is renowned for it’s efficiency and power production. This supercharger has airflow capacity to produce 700 HP. And although it is not an inexpensive way to add power, it is best evaluated on HP-per-dollar basis. Nothing comes close. If you are serious about performance, supercharging is the way to go.

Stage III is a purely racing setup. It can be driven on the street with octane booster or 100 Octane gas. With proper Brake, Suspension and Drivetrain Upgrades your SHO can be the ultimate sleeper.

 

Hmmm.. Just for the heck of it, I tried to find out the overbore for a 3.0 to go to a 3.6. (I know he claimed it was originaly a 3.2, but since we don't have those specs......) I came up with a crazy high number. Your bore/stroke specs are in inches right? I think I am converting from metric to standard wrong. 1 cubic centimeter=1 milliliter, and 1 inch equals 2.54 centimeters, right? I'll have to look it up....

 

bore x bore x stroke x .7854 x # cylinders. so the motor has a stroker crank? that would be needed to get to 3.6.

 

84 f250 you should have explained your setup because nobody believes a 650 hp sho. This far fetched and very expensive to do. And with 650 hp you should beat a 405hp zo6.

 

I still don't see a dyno slip...

 

seriously if it made 650 hp it would make much more than 300 ft lbs of torque the claims are false, to add to the insult he has copied and pasted a supercharging article from some SHO Stores Website, the 302 is a bear to get 640 hp out of it and the breathing and building blocks are everywhere, there are no good intakes available for the sho your stuck with that weird yamaha dual length runner set up which has serious HP limitations


Furthermore the transaxles had problems holding up to the power that was there stock, you could build that transaxle strong enough to handle 400 hp IMHO

 

yeah otto i was thinking the same thing. Its harder then hell to 650 out of a highly modifed 302. The 650hp would make more torque. And theres no way the drivetrain would hold up. I've been very skeptical as many others on a 650 hp sho. And the cost of doing something like this would cost a good $10,000 in no time.

 

There was never a 302 SHO. 650hp is possible if you have alot of money. And I mean alot. Most likely it would have to be with nitrous. The 3.6L is a stroked motor. They use the 3.2 block iirc. There are a bunch of supercharged SHO's out there and most are around 300-400hp range with a little less in torque. There is also a turbo SHO pushing over 400hp. You can go to www.SHOforum.com and find out alot about these cars. Also 84 f-250 just copied his replies from the SHO Shop website.

 

thats why i was talking about 380 hp max with a supercharger and headers!

 

I think that there is a lot of BS going on here. That Yamaha motor is capable of 650 horses.
And if you have ever built a 302, its relly pretty easy to get 650 horses. I refuse to give build specs and a dyno sheet, cause its currently being raced. However I will say that it does have 14.45 CR, and runs on a 2 barrel Holley 600, to 9500 RPM with a wild custom grind cam and 126 octane jet fuel. Its a real corvette killer.