Tell me truth about aftermarket heads

[PaceFever79]

I'll let you have the last word. You need it!

[TooFast98Cobra]

You boost guys are so grandiose you miss half the sport!

All you do is point and shoot! Point and shoot! All it takes is big balls.

Tweaking a few HP from a high strung NA motor, or a few tenths off your time,
takes real thought, real engineering, and real driving skills.

But you're not so worried about that!

I'm a boost guy, I'd love to take off the boost and run you N/A. you up for it? Its just a little SBF

[Mark Aubele]

I'll let you have the last word. You need it!

Didn't think you'd have anything else to say.

[PaceFever79]

I'm a boost guy, I'd love to take off the boost and run you N/A. you up for it?

Why go through all that trouble?

Just take your boost pipe off and beat me over the head!

[TooFast98Cobra]

Why go through all that trouble?

Just take your boost pipe off and beat me over the head!

lol, just having fun with you

[cemnt guy]

took me a long time to get boost. i will not be without it, its great

[went9s]

[QUOTE=PaceFever79;289072]Naturally aspirated HP is my thing.....

So how fast or slow are you?

[RSbeast]

I sure love boost. Probably about the same as I can apprecate a strong n/a build. An engine running a quarter mile pass sees redline 3-4 times tops with a sustained load as the weight of the car gets accelerated once. Hillclimbs are WAY harder as that weight is having to be moved over and over with varying load. I'm not saying its a surfire thing its going to live; but a high strung engine needs rpm to make power. If the block is the only weakpoint given both engines are allowed to upgrade internals; the boost engine will live longer simply because it can make its power at a lower rpm. The cylinder pressure doesn't Kill them; its near always rpm. Detonation can happen to any engine. If you can control temps and provide ample cooling; id venture the boost motor can be made to have consistent iat's that are lower.

A easy way to tell someone is losing an argument is when they can no longer interject with decisivve fact; but rather retort to 2nd grade 'youre wrong cause you're dumb'. Make some valid points or gtfo

[PaceFever79]

It's uncommon to see engines blow at hillclimbs. It's fairly common to see engines
blow at the drag strip. Either way, that is way off topic here.

You're right, RPM+HP is what kills stock blocks (harmonic distortion and cap walk),
that's what I said. Short blasts of low rpm high HP are less stressful providing that
you're on a good ECU tune with good gas and no detonation.

The original poster is running a truck block. I do believe that means cast pistons?
This all started because I said, with a 6-71 blower, that ported GT40 heads were
enough to safely exceed the capacity of his shortblock with no ECU or fancy tune.
It's all relative, and I'll stand by my original statement.

The rest is just grandstanding.

[PaceFever79]

Naturally aspirated HP is my thing.....

So how fast or slow are you?

Though I've raced all my life, in many sports from motorcycles to cars, from
road racing, to hillclimb racing, to drag racing, these days I'm into a different
game; my car is a period modified nostalgic hot rod. It's not built to impress
anyone but me and my nostalgia for when I was 17.

79 Pace Car
Numbers matching
79 302 with forged internals
Ported DOE 1.94 Windsor heads
Solid lifter flat tappet cam (vintage)
R4B cobra intake, 650 vacuum carb
C4, shift kit, 2800 converter
31 spline 8.8, 3.73 gears
Stock TRX suspension

I've only taken it to the strip a few times. Best time is 13.1 on street tires,
12.7 on drag radials. It could run low 12s with a better converter or lower
gears, but it's not a race car, it's just a street machine.

This was quick for a 302 Mustang in 1979....

[ame="http://www.youtube.com/watch?v=9gwW3FVStXk"]Pace Car Walk Around (Idle) - YouTube[/ame]

[mrevilracing]

It's uncommon to see engines blow at hillclimbs. It's fairly common to see engines
blow at the drag strip. Either way, that is way off topic here.

You're right, RPM+HP is what kills stock blocks (harmonic distortion and cap walk),
that's what I said. Short blasts of low rpm high HP are less stressful providing that
you're on a good ECU tune with good gas and no detonation.

The original poster is running a truck block. I do believe that means cast pistons?
This all started because I said, with a 6-71 blower, that ported GT40 heads were
enough to safely exceed the capacity of his shortblock with no ECU or fancy tune.
It's all relative, and I'll stand by my original statement.

The rest is just grandstanding.

Excuse me but where are you getting your info from? Just the simple fact that you think that a motor blowing at a drag strip equates to more stress on it than at a hillclimb is totally off base. They blow more often at the drag strip because they are over rev'd or the timing is beyond where it should be or the AF is way beyond where it should be or faulty parts - same way a motor blows at a hillclimb. Either way, a 9sec run or a 13 sec run is way less stress than a hillclimb. My spinning tires in all gears(shit A6s, RR suspension and 134 track temp), drag strip run, showed my IATs at 124 at the end of the 1/4. My IAT at the end of Giants Despair was over 160 and at Duryea it was 176. I think you need to re-think your logic regarding the stresses. These are not short bursts of low RPM high hp. I am over 6400rpm/600hp+ between corners. Yes, I have data logs to prove it. Where is your proof other than a simple statement?

Sure, this has nothing to do with whether or not a stock 5.0 block can handle 500hp or more. It's more of someone making a crazy statement with no hard evidence to back it up.

[John4cam]

Thats the best 1st post in scs history.

[mrevilracing]

Just to back up what I state, I have included screen shots of inside the data log.

Here's what it is at the start line.


IATs are only 100degrees. Rpm is @ 6400+. Load is 1.7 which is perfect but will drop due to heat. And HP is approx 530rwhp. This is only at the top of 1st gear.





By turn 1, you can see what's going on.



By the finish line, things are really rough.



At the point I cross the finish line, just look at the IATs. RWHP due to heat and belt slip has dropped to approx 450+. What I can't data log is oil temp, which is approx 230 and that started at under 180.

This is way more stress than you can possibly put in the 1/4. If I am incorrect, present the evidence.

[mrevilracing]

Just in case, here are the effects of a 2.3 mile run. Pay close attention to the coolant temps (ect) and IATs.

Start line:



Finish line:



I rest my case.

[TooFast98Cobra]

owned!

[PaceFever79]

When I used to climb, 1998-2001 there was maybe 2 or 3 out of 200 cars that had big
boost. Usually they were small import turbos. We simply did not have very many cars
with big boost running hill climbs. So I admit that my observations are outdated. But
rarely did motors blow and usually they were turbos.

I still stand by my advice about boosting a stock ford truck motor.

Owned? I suppose in your little world, yes.

[TooFast98Cobra]

Owned? I suppose in your little world, yes.[/QUOTE]

[PaceFever79]

I've come to realize I don't like the conduct of most people on this forum. It's just not
my kind of company. Too much smack talking, too many out of control egos. You guys
seem to have something to prove but mostly you impress yourselves. I'm just looking
for Mustang Camaraderie. So I've decided to stop coming here.

A round of chest pumping wolf pack applause will follow.

You guys are still legends in your own mind.

[383taman]

I've come to realize I don't like the conduct of most people on this forum. It's just not
my kind of company. Too much smack talking, too many out of control egos. You guys
seem to have something to prove but mostly you impress yourselves. I'm just looking
for Mustang Camaraderie. So I've decided to stop coming here.

A round of chest pumping wolf pack applause will follow.

You guys are still legends in your own mind.

Ouch Man down HAHAHA