3000 launch, 20psi in slicks, shocks at 3 & 2

60': 1.9017
330': 5.5209
660': 8.5749
660' mph: 79.97
1000': 11.2126
1000' mph: none
1320': 13.5121
1320' mph: 97.76

3500 launch, 20psi in slicks, shocks at 3 & 2

60': 1.9062
330': 5.5338
660': 8.5929
660' mph: 79.92
1000': 11.2333
1000' mph: none
1320': 13.5383
1320' mph: 97.48

3500 launch, 17psi in slicks, shocks at 3 & 2

60': 1.9227
330': 5.5552
660': 8.6165
660' mph: 79.73
1000': 11.2631
1000' mph: none
1320': 13.5694
1320' mph: 97.46

What's the deal? My car should be faster than this. I had the slide-a-links at 1.5 and 1 turns for the passenger & driver side, respectively, yet I could only 60' a 1.90. Did I launch too high?

Did the tires spin off the line?
What slicks are you using?
The why/try headers are a bottleneck.
What's the timing set at?
How's the cam timed?
How much does the rear rise on launch?
How much does the front rise?
Front shocks at 90-10?
Lower the front shock towers by making flat mounts, for extended front end upward travel.
Take a leaf out of the 5 leaves rear springs and clamp the front of them.
And finally, make more power. 80mph in the 1/8 is pretty weak.

Tell us more and we'll be glad to help! Most of us have been there and done that.

Is your carb opening all the way when the peddle is floored?
That's for my buddy Glen.

quote:

---

Originally posted by steve'66:
A few comments and questions;

Did the tires spin off the line?
What slicks are you using?
The why/try headers are a bottleneck.
What's the timing set at?
How's the cam timed?
How much does the rear rise on launch?
How much does the front rise?
Front shocks at 90-10?
Lower the front shock towers by making flat mounts, for extended front end upward travel.
Take a leaf out of the 5 leaves rear springs and clamp the front of them.
And finally, make more power. 80mph in the 1/8 is pretty weak.

Tell us more and we'll be glad to help! Most of us have been there and done that.

SteveW

---

I felt the tires spin a little on the 2nd run. Not on any other, and my dad couldn't see them spin either.

Slicks are 26x8.5 inch ET Drags, and they went 1.78 60' with the 5-speed dumping the clutch at 5500.

Why-try's are coming off as soon as I figure out whether or not to get the Super Comps coated.

Timing is 36* in by 3k. Will be locked when I get the time.

Cam is as it came in the crate engine, I can only assume straight up.

Front shocks are 90-10, not sure about how high each end rises. Will have to ask my dad to watch that next time.

I was thinking about some mono-leaf springs, but I'll look in to removing a leaf & clamping.

This engine should be capable of quicker times than I am getting. I'd like to get it going as strong as I can before I drop the $$$ on a 347 kit, port the hell out of the heads, solid roller, etc.

The mph is low for the e.t. with those 60'ers.

How'd you like launching off the t-brake?

quote:

---

Originally posted by steve'66:
What was the weather like when you ran?
What was its best time before?

The mph is low for the e.t. with those 60'ers.

How'd you like launching off the t-brake?

SteveW

---

It's almost like it's being choked off at the upper rpms, to me. Maybe the headers will help. Do you know of any way to check the Pertronix and see if it is ok? The previous best time was 13.4, with a 1.83 60', IIRC. The weather was similar to last night, as the 13.4 was run in March.

The brake was interesting. I wasn't expecting the car to lurch when I got on the throttle. So I had to get on the throttle a little softer than before. Once, my finger slipped off the the button & I ended up with a .19X R/T! The other times, I had .512 & .52X, and this is with regular street tires, not skinnies. It hit hard, though. Not quite as hard as a 5500rpm clutch dump with a 3.27 first gear, but still pretty hard.

You sure the bands in that tranny aren't at 200ft lbs of torque? It sounds like a serious power defecit, or the track is at Kilamanjaro-ish altitude?

Whats the car weigh?

quote:

---

Originally posted by TomP:
Something is wrong, not in suspension.

You sure the bands in that tranny aren't at 200ft lbs of torque? It sounds like a serious power defecit, or the track is at Kilamanjaro-ish altitude?

Whats the car weigh?

My Ranger was 2915 with me in it last night. The engine is a 87 5.0L with stock heads, Perf RPM, B303 cam, 1 5/8" headers, 3" single exhaust and 3.73 gears. Completely dead almost to the cord 8.5x26 MT's and yet ran 1.70 60ft and 12.84 @ 104.

---

Car hasn't been weighed in a while. It weight 3100 with me, spare tire, jack, school books, gallon of antifreeze, 8" rear, A/C, 1/2 tank. Now, I have a 9" rear, but no A/C, and I race with none of that crap in the car.

Altitude is about 550ft. Well, the Tulsa Airport is 550ft, and the track is about 5 miles from it.

quote:

---

Originally posted by TomP:
Maybe it is the ignition? I run a Duraspark distributor with the MSD 6AL box. Otherwise it seems our engines are similar but you have better heads. I'd suspect a 65 Mustang to weigh near what my Ranger does but with much improved weight distribution (mines 1810 front and 1105 rear I also have the original front shocks (200,000+ miles)

---

I have wondered if the Pertronix works well with the Strip Annihilator. I wish I had an extra dizzy to test & see.

quote:

---

Originally posted by mustangboy:
I have to agree with Rory if the only thing you did was changed from the 5-speed to the c-4 than its not surprising the car is a little slower.Its still a pretty decent et for the mph your running.

---

The automatic absorbs power, this accounts for it slowing down. The T5 should have been much faster since the heads oughta allow that car to run well into the 12's.

quote:

---

Originally posted by TomP:
Thing to do is put the stick back in and practice

The automatic absorbs power, this accounts for it slowing down. The T5 should have been much faster since the heads oughta allow that car to run well into the 12's.

---

That's what I can't figure out. With the same engine, except for 1.6 roller rockers instead of stock ones, and a Road Demon carb, Car Craft dyno'ed 367 at the flywheel. This engine really should have enough to get 12's, assuming traction, which I have. But 97 mph? Something's not right.

quote:

---

Originally posted by 65_289:
Cam is as it came in the crate engine, I can only assume straight up.

---

Could this be your HP limit? Not knowing what your .050 is, I suspect it can't be much above 215*. I don't know how you got 360 RWHP with a cam that small though. I agree with you, something isn't adding up.

A 4K stall with a 215 cam will put you out of your launch power band. You probably don't have a 3K sitting around do you?

quote:

---

Originally posted by steve'66:
OH,

Is your carb opening all the way when the peddle is floored?
That's for my buddy Glen.

SteveW

---

I'm here for ya buddy.

quote:

---

Originally posted by mustangzrule:
Could this be your HP limit? Not knowing what your .050 is, I suspect it can't be much above 215*. I don't know how you got 360 RWHP with a cam that small though. I agree with you, something isn't adding up.

A 4K stall with a 215 cam will put you out of your launch power band. You probably don't have a 3K sitting around do you?

[This message has been edited by mustangzrule (edited 10-03-2002).]

---

The spec on the cam is 224* @ .050. On the dyno, it made peak torque at about 4100.

quote:

---

Originally posted by 65_289:
That's what I can't figure out. With the same engine, except for 1.6 roller rockers instead of stock ones, and a Road Demon carb, Car Craft dyno'ed 367 at the flywheel. This engine really should have enough to get 12's, assuming traction, which I have. But 97 mph? Something's not right.

---

This is where I got the HP, but your post actually says flywheel, not rear wheel. My bad.

A 224@050 cam sounds about right for a peak of 4100 RPM with 302CID. I still think your stall is a little high though. You could increase your cam or decrease your stall and probably gain bot top end and reduced ET.