Only if you bolt them onto a Non-PI car. Compression was the same with Non-PI and PI head cars. The compression bumped a little in '01 for 9.0:1 to 9.3:1.
If you bolt PI heads onto a NPI, the compression will go over 10.0:1.
The PI heads almost do nothing except increase compression, it is the intake and cams for the 'fault' in power.
The main reason you can 'feel' it, is because it was an old car, and doesn't have the luxuries/suspension/smoothness of a new car.
Ever been in a 'new' 14 second car and then been in an 'old' late 60-early 70's muscle car than ran 14 seconds?
The muscle car feels way faster...although they run the same time
My whole point in my post was how the cars feel, which is a very personal thing. 10 people will have 10 different opinions. I know the 4.6 on paper and on the track similarly equipped will outperform the 5.0 and that they have somewhat similar powerbands...it jst doesn't feel like it when I am behind the drivers seat if you know what I mean.
I don't think anyone had a problem with that. The point we were trying to argue was, simply because the 4.6 is a higher revving engine (both sohc & dohc) does not make it unfit for a mustang. In the same token, it does not make the mustang more like high revving imports.
The bottom line is muscle are all about strong low end torque.
To get low end torque you need "BIG" displacement! The 302 was too small, the 281 o well......................
I race cobras all the time. 281s have no bottom end, by the time they start making power my turbos have taken over. Going 351 would only make this gap wider. The 281 heads are amazing, but their is no replacement for displacement.
Let's not forget either that the block itself is far stronger than both 302W and 351W.
What can 4.6 blocks handle?
They have been known to handle upwards of 1000+ hp.
Thats ALL 4.6 blocks once u get forged internals?
Damn. I didnt realize the numbers were THAT high. What controls the variations? U mean like 96-98, 99-04, 05-present? Or do u mean DOHC vs. SOHC ?
Im not too 4.6 literate.
The difference are between all of them really. I myself am not 100% literate on it, but for starters there are 4.6l Romeo and 4.6l Windsor blocks which were different. There was also the 4.6l aluminum cobra block as well as a 4.6l iron block. Each one seems to be stronger/weaker in some regards. Here is a bit of info on some of it.... http://www.babcox.com/editorial/ar/eb40228.htm
I didnt mean to imply that the 4.6 is not a worthy Mustang engine...but I do think it will be outclassed by the Dodge 5.7 and 6.1 Hemi and the Chevy large displacement small block (I dont know what is going into the new camaros other than I know it has a lot of cubes). If they want to keep the 4.6 around then great, as I already admitted it is a great engine. I do think Ford should at least offer up the option of getting a GT with a lot more displacement without having to step up to a Shelby. What I personally would REALLY like to see Ford do is offer a stroked version of the 4.6 as the standard GT engine and then as a $1k-$4k option have a close to or over 6.0 motor that makes excellent naturally aspirated hp like Fords competitors will have.
And what I meant earlier when i said Mustang owners had to shell out an additional $10k in the 90's to be competitive with the GM cars was that if you wanted a from the factory Mustang that could at least come somewhat close to keeping up with the Camaros/Firechickens you had to spend an additional $10k and get a Cobra, and you would still be sucking tail pipe. And just to be clear when I say additional I mean that a Cobra cost about $10k more than what a Mustang GT or Camaro Z28 did. Yes the Mustang outsold the F-bodies, luckily for Ford performance does not necessarily equal high sales. I for one was embarassed that Ford stood back and did nothing to make the Mustang gain ground in the performance non-war of the 90's. I hope history does not repeat itself!
I really dont buy that Ford will have to spend THAT much more to drop a little biger engine in the Mustang to compete with its new American made competition. If Chevy and Dodge can both do it, so can Ford. Like you said, the bulk of sales come from 6 bangers anyway. And if Ford would have done something in the nineties to equal or surpass the performance of the GM's they still would have outsold them and quite possibly would have sold more since I am sure there were quite a few buyers out here that got one of the GM's just because they read in Motor Trend or R&T that they trounced the GT in performance and beat the Cobra whie costing around $10k less. I am not saying a majority of F-body sales were due to that, but I personally know a couple people that ended up with a Z28 just for that reason.
Pretty much…although there are different variations that are known to be slightly stronger/weaker.
I beleive the Teksid block in the 93-98 Mark 8's and 96-98 Cobras is the strongest 4.6L block. It will handle up to 1000HP.
That would be the block to base a 4.6L stroker motor on.
The regular iron GT block can handle up to 500HP. The internals can't though and must be upgraded
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