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dammen8 · 03-09-2003, 02:24 PM

<BLOCKQUOTE class="ip-ubbcode-quote">quote:<HR>Originally posted by mistowomofo:
Hey Chad, could you tell me how much your car weighs and what kind of suspension your running?
I'm about to get to work on my '73 Formula, and I'm shooting for 9's.

Thanks Jeremy.<HR></BLOCKQUOTE>

Jeremy at the time of the 9.91 passes the car weighed 3520 with me in it and the suspension had the cheapy and old summit 3 way adjustable shocks on all 4 corners. I have moroso trick springs up front with global west bushings in the control arms and I have all caltrac stuff in the rear of the car...If you want to know more just let me know

. Talk to you later

Chad Dammen

ND's fastest Pontiac (I think) and Minot's fastest street car (not like that means much)

dammen8 · 03-09-2003, 03:35 PM

here is my new sheet with highest hp.

Chad Dammen

ND's fastest Pontiac (I think) and Minot's fastest street car (not like that means much)

slowbird · 03-09-2003, 03:46 PM

You said in the first post that you had a turtle to try, did you try it and did it make a difference. I have been thinking about doing something like this but have never seen any before and after test with it.

75bird 7.41 1/8mile at 92mph street car
73Ventura 11.88 at 113 streetcar
69GrandPrix 12.64 at 107 tow car
65GTO 10.14 at 129 tri-power dragcar

dammen8 · 03-09-2003, 04:43 PM

The dyno operator said that he has never seen a turtle work on a engine before, but I thought I would give it a try anyway. The turtle made absolutely no difference in hp but it did pick up 3 ftlbs of tq but it did this only after I put a 1" spacer on. Without the spacer the turtle did nothing. IMO a turtle is alot of money for 3ftlbs of tq, but on the other hand this is just my experience with it and this does not mean that it would not work better with a different engine or intake.

Chad Dammen

ND's fastest Pontiac (I think) and Minot's fastest street car (not like that means much)

tom s · 03-09-2003, 04:59 PM

FYI,I have a friend that ran a 672in W headed motor,they took out the 80 lb pump,went to a 60lb and picked up a bunch of HP.Also a old time pontiac engine builder told me 80lb pumps are VERY hard on dist gears.Tom

mistowomofo · 03-09-2003, 05:24 PM

Thanks for the info Chad.

Rob · 03-09-2003, 05:40 PM

I would look at your headers, I think you've out powered your exhaust.

-Rob

Tom Vaught · 03-09-2003, 06:54 PM

How high are you running the engine thru the mph
lights?

Lets say it is 7200 rpm, if you are reading the oil pressure at the top of the block and your sheet says you are averaging 85 psi up to 5800
rpm, around 100 psi at 6500 rpm, and possibly 115
psi at 7200 rpm, why do you need so much oil pressure?

There is some hp to be gained by sizing the pump
for 75 psi at 7200 rpm vs the much higher pressure. We have done testing where the actual pressure at the rod cap was only 15 psi at high rpm and the engines lived just fine. Even if your block pressure was 75 psi and the rod pressure was
1/2 that would still be 37 psi which many old pontiacs probably actually had at the top of the block with the old oil pumps with the 45 psi spring. Tom V.

What is the size of your headers?

Jack Ferris · 03-09-2003, 08:14 PM

I too had excessive oil pressure using the M54D(I think thats the #) 80 psi pump. Is the difference between the 80# pump and the 60# pump the spring? If I use the spring assy out of an M54DS will that make my 80# a 60#?

dammen8 · 03-09-2003, 09:04 PM

Tom,

I do realize that I have enough oil pressure for 2 engines and I am thinking about switching to the standard pump. I guess I have always had good luck with the ra4 pump but at the same time I have always had huge oil pressure. I am not taking it from the block, I am getting my reading from the "out" side one the oil filter housing, how much difference would I see if I switched the spots? And I am guessing I would be using the plug right by the distributor?

I have been wondering about my headers, I guess I did not think that they were that small but I guess I could be wrong. Anyway they are 2"x27"long with a 3 1/2"x10" collector this is from the hooker website.

With this engine build up I had expected more rpm on top end with the bigger intake and better carb but it went just the opposite

. I did expect a loss of lower rpm torque and I did like the fact that I made alot more torque up high but I did not care for the peak at 6200, when its that low its hard to gear for. I guess if it is the headers that is a simple and inexpensive fix compaired to alot of other stuff. Oh and Tom I used to finish the race at around 6600-6700rpm but this was when the engine was peaking at 6400-6500, so who knows now...

Chad Dammen

ND's fastest Pontiac (I think) and Minot's fastest street car (not like that means much)

dammen8 · 03-09-2003, 09:06 PM

<BLOCKQUOTE class="ip-ubbcode-quote">quote:<HR>Originally posted by Rob:
I would look at your headers, I think you've out powered your exhaust.

-Rob<HR></BLOCKQUOTE>

Like I said above I would be happy if this is whats holding me back. Is there a chart or some place that I can look at to see what size I should have?

Chad Dammen

ND's fastest Pontiac (I think) and Minot's fastest street car (not like that means much)

Larry Navarro · 03-10-2003, 07:13 AM

Jack....
M54F = 80lb.
M54D/DS = 60lb.

DS, IS PUMP W/SCREEN

1973 SD455 T/A
1979 S.E. T/A
http://community.webshots.com/album/16587603rOyvmFCiHs

Half-Inch Stud · 03-10-2003, 07:44 AM

Chad,

Glad to hear the Ring set was successful. HOw did you come about deciding on a GAPLESS Top-Ring ?!

You old motor and new motor make the same 661HP at 5500RPM. I was being generous by 20HP...or 2.8%

Good work Chad. 26 pulls sounds alot like a completely physically and emotionally exhaustive effort.
-------------------------------------------------
I have a warm feeling about my motor making 650+HP at 5500RPM. I think lots of fellas HERE are going to be pleased. Lots of fellas at "other sites" are gonna talk crap...when revealed how&what it took to get such numbers". I'm not talking about what&how because it's crap until I get some data.

Worked the Dana60s this weekend...gonna need it. May need the spool to toss the xxLb 4-pinion Dana60 posi.

Half-Inch Stud

"tbdET/1xxMPH/1.xx 60foot/28"/3.54:1/10"/469 #48/Flat HYD/DualQ-Jets/Offyl/3xx0Lbs
11.00/123MPH/1.50 60foot/29.5"/4.10:1/10"/469 #48/FlatHYD/DualQuad/Wenzler/3250Lbs
12.00/112MPH/1.61 60foot/26"/3.31:1/10"/469 #48/FlatHYD/Q-Jet/Torker/3650Lbs
12.70/103MPH/1.71 60foot/28"/4.10:1/12"/469 #48/FlatHYD/Q-Jet/Torker/3950Lbs"

Half-Inch Stud · 03-10-2003, 07:47 AM

WHOA, purpose of the turtle is to achieve/improve idle, and off-idle response. Something a Dyno can never show&tell you.

I'm all about turtles.

Half-Inch Stud

"tbdET/1xxMPH/1.xx 60foot/28"/3.54:1/10"/469 #48/Flat HYD/DualQ-Jets/Offyl/3xx0Lbs
11.00/123MPH/1.50 60foot/29.5"/4.10:1/10"/469 #48/FlatHYD/DualQuad/Wenzler/3250Lbs
12.00/112MPH/1.61 60foot/26"/3.31:1/10"/469 #48/FlatHYD/Q-Jet/Torker/3650Lbs
12.70/103MPH/1.71 60foot/28"/4.10:1/12"/469 #48/FlatHYD/Q-Jet/Torker/3950Lbs"

Rob · 03-10-2003, 05:35 PM

I don't have a chart, something that happened to 700+hp engines, the 3 1/2" collector low 700s, 2 inch tubes 720s.

That Torque curve is too flat even for a pontiac, something is a restriction and as you have a victor and a Dominator it's not the intake. If you had Full Throttle its not carb either. It's probably not worth re-dynoing to get the tune dead on, I would take that 4-500 bucks and make a set of headers. If you spray, 2 1/8 straight with 4 inch collector. Try both headers at the track. Re-dyno next year with more cam.

Never seen a turtle make any power either, if they only work at idle not much use on a drag car!

-Rob

Tom Vaught · 03-10-2003, 06:27 PM

My exhaust program which has proven to be very accurate in the past says 31 inches from the exhaust valve seat to the end of the primary tube
where it exits into the collector. Most exports are about 4 inches long so your pipe are close to the correct length. It also recommends a 2" tube diameter for 6600 rpm power peak. Based on this info plus your input, I think your header pipe diameter and length is fine assuming no spray!
If you spray the length stays the same but the diameter needs to be 1/8 inch larger.

Tom V.

Half-Inch Stud · 03-11-2003, 08:03 AM

...luxury for some.

I consider it a necessity for a race engine to idle cleanly, keeping the plugs clean during warmup in the pits.

GTOGURU · 04-08-2003, 07:54 AM

<BLOCKQUOTE class="ip-ubbcode-quote">quote:<HR>

I'm all about turtles.

<HR></BLOCKQUOTE>

Turtle,Turtle!

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