So, I took her to the track

[OVERKILL]

Well, in order to establish a baseline to compare to when I'm done with the H/C/I swap, I figured I'd take the old girl to the track today and see what she does. Keep in mind, its a stock engine, with the original transmission, stock gears out back on stock-sized tires on stock rims, and with 297,000Km on the odometer.

The best I got out of her was an 18.0064 @ 76Mph.

Not too bad for a tank of a car.

Cars I can now say my TC is faster than:

Volkswagen Jetta
Pontiac Sunfire
4-cylinder Fox-body Mustang
4-cylinder Chevy S10
Hyundai Accel

As they were all at the track and posted slower times than me :)

[v8_dave]

:rof: very nice about the boat faster than some cars. Soon you will be dipping into the 14's?

[OVERKILL]

MAYBE 15's :)

[Elemino]

I'm sorry, I'mma have to ask you to come up with better cars than that. :D I've beaten cars on the street with better preputations. I like the jetta though..

Does your car have dual or single exhaust?

[pro-five-oh]

Yup, 18s sound about right. Plenty of room for improvement with a little money and a lot of time, though.

[Mr Wiggl3s]

Its kinda hard to get a car, thats got the aerodynamics of a brick, going fast

[gadget73]

18 flat in a Townie with stock gearing is actually not bad. Low 18s on a Grand Marq/Crown Vic are expected, and about an 18.2-18.4 on a Townie from the extra weight. I know of an HO powered Townie with 3.73 gears and ported heads that runs 15.99. Thats also with a tranny that has 196k miles on it and slips the 1-2 shift. Depending on the work you're doing, 15s are entirely possible with an NA engine.

[OVERKILL]

I'm sorry, I'mma have to ask you to come up with better cars than that. :D I've beaten cars on the street with better preputations. I like the jetta though..

Does your car have dual or single exhaust?

Duals :)

And, its getting E7's, stock Mustang cam, 1.7 roller rockers and an Explorer intake.

[Elemino]

Duals :)

And, its getting E7's, stock Mustang cam, 1.7 roller rockers and an Explorer intake.Nice upgrades

[Four Eyed Stangs]

Fun!

It takes nerve to run one down the track!

You're only a second behind mine(HO).

The HO conversion will help you a lot!

[Mr Wiggl3s]

Have yall had anyone to put some extra power in a HO town car here?

All i remeber is some people talk about a dude who put a wing on his lol

[Four Eyed Stangs]

E7's plus 1.7 rockers on a factory flat top short block will really be pushing the PTVC.

You better check the clearance carefully.

[OVERKILL]

Actually, no, it won't be.

Rocker ratio only affects lift at near or close to near max valve lift and lift doesn't cause P2V issues. Piston to valve clearance issues occur when the piston is chasing the valve up the cylinder, or the valve is chasing the piston down the cylinder, in either instance, its not a function of LIFT that causes issues, but rather duration, since that is what dictates at what time the valve starts to chase the piston or when the the valve starts to close as the piston begins to chase it.

[Four Eyed Stangs]

Lift will be affected as soon as the arm moves.
The only time total lift will be the same as 1.6's will be at 0 cam lift.

E7's are a close fit with 1.6's as it is.

I'd still try the 1.7's on mine though.

[OVERKILL]

If you plot the lift at valve vs piston position in the bore, you will see that lift make no real difference in terms of piston to valve clearance, it is duration.

1.6 vs 1.7 lift at valve (this is what I was getting at with the rocker comparison):
Remember, .010-0.030 variance can exist just in tolerance differences between the lifters and pre-load on them and you are supposed have a MINIMUM of 0.080 clearance at the point closest to interference between piston and valve.

MAX Lift at cam: 0.2775 (stock HO camshaft)

Cam 1.6 1.7
0.05 .08 .085
0.10 .16 .17
0.15 .24 .255
0.20 .32 .34
0.25 .40 .425
0.27 .432 .459
max .444 .472

Now, just looking at the above chart, P2V interference issues occur as stated earlier, when the piston is chasing the valve, or when the valve is chasing the piston, in NEITHER instance, is the valve at or even near max lift. When the cam is around .1 to .15, that's when (on a higher duration camshaft) interference can become an issue. At those lift numbers, the variance between a 1.6 ratio rocker and a 1.7 ratio rocker is 0.010, which is NOTHING, the plunger depression difference between any two lifters on the engine can be more than that! THAT was why I said the difference between 1.6's and 1.7's, at the valve, is ONLY relevant when the valve is nearing max lift, that is when the biggest variances between the two ratios is observable, otherwise, the only other observable differences are the slight faster opening and closing rates that the higher ratio provides.

[Four Eyed Stangs]

I've had an '86 Mustang since '86.
I am well aware of the hazzards of swapping from e6 heads.

Have fun!

[OVERKILL]

Well, the person who first told me about this grinds cams for a living, and, after looking at what he told me, it makes perfect sense.

And yes, with flat-tops, P2V is definitely something that needs to be checked, period.

[sam_sayz]

i guess it all about speed.. Right? upgrading you engines...etc... i have a Volswagen Jetta...and i want to make it run faster than yours..But i need first to change my Volkswagen Alternator (http://www.dubautoparts.com/volkswagen-alternator.html)...any advice on upgrade i can do & what i will replace with my alternator that would be in line with the upgrade...

[87 town]

Well, in order to establish a baseline to compare to when I'm done with the H/C/I swap, I figured I'd take the old girl to the track today and see what she does. Keep in mind, its a stock engine, with the original transmission, stock gears out back on stock-sized tires on stock rims, and with 297,000Km on the odometer.

The best I got out of her was an 18.0064 @ 76Mph.

Not too bad for a tank of a car.

Cars I can now say my TC is faster than:

Volkswagen Jetta
Pontiac Sunfire
4-cylinder Fox-body Mustang
4-cylinder Chevy S10
Hyundai Accel

As they were all at the track and posted slower times than me :)

I found that right off the line, she is a bit slow, although you did pretty well, but once I get my momentum going and pushing on the gas, my townie gets to be "really" moving. Like in the movie X-Men, I think it was X-Men, there was one huge character knick named "momentum" and once he got his momentum going he was able to run through buildings and walls and so on... That is how I see the TC...lol....just have to be sure your brakes are good....:eek:

[gadget73]

My HO car has run a best of 17.25 and a worst of 17.88 in the quarter. Considering thats barely better than stock, I'm not pleased. Oh well, new ported heads getting installed this weekend, and it better move when I'm done.

[hotrod88tc]

Ive run my hotrod at the track for a best of 18.8@ 72 sounds kinda crappy as compared to what some of yall are doin but im workin on changin that

[clem]

Motor trend said the 90 302 tc did 17.5-80 0-60 10.2



89 cv 17.3-80.6 9.7


90 cv police 18.5-78.1 11.4 121.3


90 caprice 17.5-79.6 9.9 130
police


At least you can beat this;


90 caprice 19.1-71 12.6
305 wagon

[gadget73]

Funny, there was a recent thread on another forum asking about whether the 351 police cars were faster than a 5.0 car. I guess the answer is no. Probably in the earlier 80s they were faster than a CFI model but the SEFI really does good things for a 302.