2013 Cobra Jet Specs are up

[D.Johns]

Lol ok they seem to have it fixed now.

5.0 SCJ no longer says SS only and the pulley sizes are 3.75 upper and 8in lower. Had me worried there for a little bit with all this stuff. Maybe I need to also check the valve and other specs just in case! Lol

[Andrew Hill]

Originally Posted by 69Cobra

Cubic inch per hp the 363 is pretty close to your combo. 363/330 = 1.1 cu/hp vs. 350/325 = 1.07.

I'm sure it will eventually get hit but it looks like the best combo they've got for '13.

I don't have the cylinder heads, intake, cam, compression, or throttle body that 363 does lol.

[69Cobra]

Originally Posted by Andrew Hill

I don't have the cylinder heads, intake, cam, compression, or throttle body that 363 does lol.

Aaaahhhhh minor details lol

[Damn Yankee]

Anyone know of anybody building a 363 ?

[Dwight Southerland]

Originally Posted by 69Cobra

. . . 302/350 = .86 cubic inch per hp factored. Someone please show me a NA combo that came out of the box factored this hard. To be honest all for of the combo are factored hard in my opinion.

1964-65 Corvette 327 375hp = .872
1964-65 Shelby 289 325 hp = .889

FYI

If you are going to campaign, be consistent.

[69Cobra]

Originally Posted by Dwight Southerland

1964-65 Corvette 327 375hp = .872
1964-65 Shelby 289 325 hp = .889

FYI

If you are going to campaign, be consistent.

Thanks for the info Dwight I wasn't around in those days but can you tell me how many people actually campaign either of those combo's?

[Jeff Lee]

1969 AMX cross-ram SS package.
Factory rated at 340 HP, NHRA instantly made it 405 HP.
390/405= .9629.
Today it is 407 HP or .9582
Consistently campaigned for 44 years

[69Cobra]

Originally Posted by Dwight Southerland

1964-65 Corvette 327 375hp = .872
1964-65 Shelby 289 325 hp = .889

FYI

If you are going to campaign, be consistent.

Just a FYI the higher the number the softer the combo. In other words the .889 has more cube's per factored hp than the .86 of the 302/350 combo therefore the 302/350 combo is still the hardest factored N/A combo out of the box that I know of.

[Dwight Southerland]

Originally Posted by 69Cobra

Thanks for the info Dwight I wasn't around in those days but can you tell me how many people actually campaign either of those combo's?

The very reason why such combos were never considered by any racer is because of the high power factor. Of course those two cars are now such expensive collertor cars that it would be difficult to consider either as a race car. However, even "in the day" those would not have been considered good choices because of the high power factor.

The new 302/350 would be tough, but this is a VERY sophisticated engine when compared to engines from the 60s. Most currently competing combinations from all makes fall into a power factor/displacement range of .75-.92. Some high performance version go as high as 1.1. Then the actual power produced is 60%-80% above the power factor. Just using that info for comparison, the 302/350 would need to make actual power north of 570. Is that possible? That's approaching 2 hp/cu in.